LinuxLists.cc - [linus:master] [x86/syscall] 1e3ad78334: will-it-scale.per_process

2024-04-19 05:56:19

Subject: [linus:master] [x86/syscall] 1e3ad78334: will-it-scale.per_process_ops 1.4% improvement

Hi Linus,

We noticed that commit various micro benchmarks. instructions do have result of this commit. and hope it can be further investigation. Thanks.

kernel test robot
commit: 1e3ad78334a69b36e1 ========================== compiler/cpufreq_governor/ gcc-13/performance/x86_6
commit:
0cd01ac5dc ("x86/bugs: 1e3ad78334 ("x86/syscall:
0cd01ac5dcb1e18e ---------------- %stddev %change \ | 860611 753301 21797058 1362315 21797058 0.04 ? 7% -7.4% 1.98e+09 1.47 -1.2 30820475 3.45 -4.4% 1.504e+10 0.29 +4.5% 0.05 ? 2% -4.2% 1.56 -1.2 3.43 -4.3% 0.29 +4.5% 208138 1.973e+09 30729762 1.499e+10 4.537e+12 12.23 -0.6 10.09 -0.6 22.31 -0.4 9.25 +0.2 8.79 +0.2 7.13 +0.2 8.37 +0.3 12.38 -0.6 10.12 -0.5 22.63 -0.4 0.48 ? 2% -0.0 0.00 +0.2 9.11 +0.2 8.88 +0.2 7.13 +0.2 8.43 +0.3 1.20 -0.7 1.46 -0.2 0.51 -0.1 0.38 ? 5% -0.1 0.48 ? 2% -0.0 0.00 +0.1 7.97 +0.1 10.43 +0.2 0.72 ? 3% +0.2

************************** lkp-icl-2sp8: 64 ========================== compiler/cpufreq_governor/ gcc-13/performance/1HDD/
commit:
0cd01ac5dc ("x86/bugs: 1e3ad78334 ("x86/syscall:
0cd01ac5dcb1e18e ---------------- %stddev %change \ | 136026 ? 3% 5.516e+10 5.427e+10 137060 ? 23% 50345 ? 26% -56.2% 289383 ? 9% 15965 ? 85% +177.3% 136562 ? 23% 50345 ? 26% -56.2% 288523 ? 9% 15965 ? 85% +177.3% 1.71 -0.5 43.01 -0.3 23.61 -0.3 26.52 -0.2 16.22 -0.2 13.89 -0.2 39.07 -0.2 16.75 -0.2 15.77 -0.2 10.55 -0.2 13.78 -0.2 9.48 -0.2 29.46 -0.1 25.18 -0.1 21.74 -0.1 27.48 -0.1 43.89 -0.1 17.24 -0.1 27.21 -0.1 17.10 -0.1 18.02 -0.1 3.82 -0.1 0.57 -0.0 1.61 -0.0 2.91 -0.0 2.43 -0.0 45.81 +0.1 45.27 +0.2 79.22 -0.7 57.10 -0.5 70.66 -0.4 36.81 -0.3 31.75 -0.3 20.12 -0.2 17.70 -0.2 16.79 -0.2 29.54 -0.1 18.34 -0.1 19.31 -0.1 4.47 -0.1 1.32 -0.1 3.38 -0.1 2.56 -0.0 2.08 -0.0 2.33 -0.0 2.44 -0.0 1.07 -0.0 1.30 -0.0 0.84 +0.0 0.00 +0.6 27.25 -0.2 1.30 -0.1 0.24 -0.0 0.12 +0.0 0.84 +0.0 0.92 +0.1 0.00 +0.5

************************** lkp-icl-2sp7: 64 ========================== compiler/cpufreq_governor/ gcc-13/performance/x86_6
commit:
0cd01ac5dc ("x86/bugs: 1e3ad78334 ("x86/syscall:
0cd01ac5dcb1e18e ---------------- %stddev %change \ | 5.631e+10 5.54e+10 55177 ? 10% +36.4% 55177 ? 10% +36.4% 46.20 -0.5 35.83 -0.4 20.24 -0.3 20.87 -0.3 1.66 -0.1 0.66 ? 3% -0.1 0.63 ? 4% -0.0 4.29 -0.0 2.20 -0.0 1.88 -0.0 4.33 ? 3% +0.3 3.66 ? 3% +0.4 46.41 -0.5 48.17 -0.5 36.13 -0.5 20.30 -0.3 20.97 -0.3 55.86 -0.3 24.71 -0.2 2.62 -0.2 4.54 -0.1 5.33 -0.0 4.40 -0.0 2.28 -0.0 2.06 -0.0 0.08 ? 8% -0.0 0.78 +0.0 59.97 +0.3 58.28 +0.3 18.84 +0.5 0.00 +1.2 20.09 -0.3 24.32 -0.2 2.65 -0.2 4.84 -0.0 5.16 -0.0 4.27 -0.0 0.08 ? 6% -0.0 1.82 -0.0 0.70 +0.0 0.00 +1.1

************************** lkp-icl-2sp7: 64 ========================== compiler/cpufreq_governor/ gcc-13/performance/x86_6
commit:
0cd01ac5dc ("x86/bugs: 1e3ad78334 ("x86/syscall:
0cd01ac5dcb1e18e ---------------- %stddev %change \ | 19402 ? 14% +63.7% 3272 ? 10% +40.4% 3241 +10.1% 162368 6303220 6236896 6341375 6171078 6144519 19272 2.902e+09 48365768 5809136 2394 +1.6% 1324 -2.7% 3.529e+10 0.24 ? 3% -0.1 85202098 ? 4% 3168 ? 2% +11.4% 1.03 -2.7% 1.897e+11 0.97 +2.7% 3.14 -3.8% 100663 100663 0.24 ? 3% -0.1 1.03 -2.7% 0.97 +2.7% 3.471e+10 83783190 ? 3% 3114 ? 2% +11.0% 1.866e+11 98965 98966 1.139e+13 4.88 ? 2% -0.3 4.94 ? 2% -0.2 3.29 ? 2% -0.2 3.26 -0.1 3.30 -0.1 2.48 -0.1 2.34 ? 2% -0.1 2.12 -0.1 0.84 ? 2% -0.1 0.86 ? 2% -0.1 0.89 ? 3% -0.1 1.63 ? 2% -0.1 0.86 ? 3% -0.1 2.40 ? 2% -0.1 1.26 -0.1 0.58 ? 3% -0.1 1.45 -0.1 0.55 +0.0 0.86 ? 3% +0.1 3.11 +0.1 1.50 ? 2% +0.1 0.70 +0.1 1.15 ? 2% +0.1 1.41 ? 2% +0.1 1.18 ? 2% +0.2 3.90 ? 2% +0.2 3.95 ? 2% +0.2 1.36 ? 2% +0.2 4.08 ? 2% +0.2 4.66 ? 3% +0.3 4.06 ? 3% +0.3 4.58 +0.3 5.07 +0.3 4.20 ? 3% +0.3 6.71 ? 2% +0.4 0.17 ?141% +0.4 0.00 +0.5 8.22 -0.6 16.53 -0.6 16.36 -0.6 5.04 -0.2 5.14 ? 2% -0.2 9.50 -0.2 3.54 -0.1 2.62 -0.1 2.56 -0.1 1.89 -0.1 1.74 -0.1 1.38 -0.1 1.54 -0.1 0.44 ? 4% -0.1 0.42 ? 4% -0.1 0.42 ? 4% -0.1 0.40 ? 4% -0.0 2.46 -0.0 0.42 ? 4% -0.0 0.32 ? 4% -0.0 0.24 ? 3% -0.0 0.31 ? 3% -0.0 0.22 ? 3% -0.0 0.55 -0.0 0.75 -0.0 0.29 ? 3% -0.0 0.28 ? 3% -0.0 0.22 ? 2% -0.0 0.20 ? 3% -0.0 0.56 -0.0 0.53 -0.0 0.18 ? 3% -0.0 0.15 ? 7% -0.0 0.16 ? 3% -0.0 0.12 ? 6% -0.0 0.07 -0.0 3.28 +0.1 7.43 +0.1 4.15 +0.1 1.07 +0.1 2.93 +0.4 52.11 +1.6 47.02 +1.9 0.00 +3.4 8.38 -0.7 15.83 -0.6 5.47 -0.3 5.17 -0.2 4.64 -0.2 4.24 -0.1 4.36 -0.1 1.94 -0.1 2.02 -0.1 2.18 -0.1 2.01 -0.1 1.33 -0.1 1.54 -0.1 1.19 -0.1 1.34 -0.1 2.30 -0.0 1.97 -0.0 0.97 -0.0 0.56 -0.0 0.39 -0.0 0.30 -0.0 0.36 -0.0 0.44 +0.0 0.34 +0.0 4.14 +0.1 1.57 +0.1 2.61 +0.4 0.00 +2.9

************************** lkp-icl-2sp7: 64 ========================== compiler/cpufreq_governor/ gcc-13/performance/x86_6
commit:
0cd01ac5dc ("x86/bugs: 1e3ad78334 ("x86/syscall:
0cd01ac5dcb1e18e ---------------- %stddev %change \ | 1.74 -0.1 1.411e+13 2838242 7122323 3972723 1.016e+08 6407021 7374513 3962914 1108 +1.8% 3.02 -0.3 3.40 ? 2% -0.2 2.93 ? 3% -0.2 17.72 -0.2 0.94 -0.0 3.13 -0.0 2.07 -0.0 0.56 -0.0 43.17 +0.5 34.06 +0.5 13.54 +0.8 10.40 +1.0 0.00 +1.4 3.94 -0.4 3.85 ? 2% -0.2 3.15 ? 2% -0.2 7.88 -0.1 4.44 -0.1 1.18 -0.1 2.10 -0.0 2.38 -0.0 2.32 -0.0 35.10 +0.6 27.59 +0.7 25.10 +0.7 0.00 +1.6 3.90 -0.2 2.90 ? 2% -0.2 7.64 -0.1 2.08 -0.1 0.95 -0.0 2.76 -0.0 1.64 -0.0 2.05 -0.0 0.00 +1.4

************************** lkp-icl-2sp8: 64 ========================== compiler/cpufreq_governor/ gcc-13/performance/1HDD/
commit:
0cd01ac5dc ("x86/bugs: 1e3ad78334 ("x86/syscall:
0cd01ac5dcb1e18e ---------------- %stddev %change \ | 4.408e+10 0.21 -0.0 4.336e+10 1.054e+08 1756286 879217 38.90 -0.6 31.84 -0.5 40.48 -0.4 19.84 -0.4 22.29 -0.4 16.32 -0.3 26.13 -0.3 23.37 -0.3 47.74 -0.2 0.52 -0.2 2.06 -0.1 1.33 -0.1 0.64 ? 2% -0.1 2.62 -0.0 1.02 -0.0 0.66 -0.0 1.48 -0.0 0.66 -0.0 1.06 +0.0 0.83 ? 3% +0.1 1.60 +0.1 0.71 ? 2% +0.1 3.00 +0.2 5.63 +0.2 2.37 +0.2 2.65 +0.2 10.09 +0.3 4.37 +0.4 4.84 +0.4 59.21 -1.0 48.48 -0.9 40.60 -0.4 22.42 -0.4 26.21 -0.3 47.88 -0.2 3.21 -0.1 2.62 -0.1 2.07 -0.1 4.34 -0.1 1.28 -0.0 0.69 -0.0 1.06 -0.0 0.84 ? 2% -0.0 0.76 -0.0 0.65 -0.0 0.81 -0.0 5.70 +0.2 2.03 ? 2% +0.3 4.83 +0.3 10.18 +0.3 0.00 +1.1 2.68 -0.1 4.24 -0.1 2.04 -0.0 4.80 -0.0 1.67 -0.0 0.66 ? 2% -0.0 0.72 -0.0 0.68 ? 3% -0.0 0.50 -0.0 0.59 +0.1 0.96 +0.1 0.57 +0.1 1.87 ? 2% +0.3 0.00 +1.0

Disclaimer:
Results have been for informational design or configuration

--
0-DAY CI Kernel Test Service
https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git master
threads 2 sockets (Skylake) with 192G memory
the commit also has significant impact on the following tests:
-------------------------------------------------------------------------------------+
| stress-ng: stress-ng.null.ops_per_sec -4.0% regression |
| 64 threads 2 sockets Intel(R) Xeon(R) Gold 6346 CPU @ 3.10GHz (Ice Lake) with 256G memory |
| cpufreq_governor=performance |
|
|
|
-------------------------------------------------------------------------------------+
| stress-ng: stress-ng.fpunch.ops_per_sec -1.6% regression |
| 64 threads 2 sockets Intel(R) Xeon(R) Gold 6346 CPU @ 3.10GHz (Ice Lake) with 256G memory |
| cpufreq_governor=performance |
|
|
|
|
|
-------------------------------------------------------------------------------------+
| unixbench: unixbench.throughput -1.4% regression |
| 64 threads 2 sockets Intel(R) Xeon(R) Gold 6346 CPU @ 3.10GHz (Ice Lake) with 256G memory |
| cpufreq_governor=performance |
|
|
|
-------------------------------------------------------------------------------------+
| will-it-scale: will-it-scale.per_process_ops -1.1% regression |
| 64 threads 2 sockets Intel(R) Xeon(R) Gold 6346 CPU @ 3.10GHz (Ice Lake) with 256G memory |
| cpufreq_governor=performance |
|
|
|
-------------------------------------------------------------------------------------+
| will-it-scale: will-it-scale.per_thread_ops -3.4% regression |
| 64 threads 2 sockets Intel(R) Xeon(R) Gold 6346 CPU @ 3.10GHz (Ice Lake) with 256G memory |
| cpufreq_governor=performance |
|
|
|
-------------------------------------------------------------------------------------+
and materials to reproduce are available at:
.01.org/0day-ci/archive/20240419/202404191333.178a0eed-yujie.liu@intel.com">https://download.01.org/0day-ci/archive/20240419/[email protected]
===============================================================
kconfig/mode/nr_task/rootfs/tbox_group/test/testcase:
4-rhel-8.3/process/16/debian-12-x86_64-20240206.cgz/lkp-skl-fpga01/futex4/will-it-scale
Change commas to semicolons in 'spectre_v2' sysfs file")
Don't force use of indirect calls for system calls")
1e3ad78334a69b36e107232e337
---------------------------
%stddev
\
-1.4% 848885 proc-vmstat.numa_hit
-1.6% 741136 proc-vmstat.numa_local
+1.4% 22102512 will-it-scale.16.processes
+1.4% 1381406 will-it-scale.per_process_ops
+1.4% 22102512 will-it-scale.workload
0.04 perf-stat.i.MPKI
+19.2% 2.36e+09 perf-stat.i.branch-instructions
0.30 perf-stat.i.branch-miss-rate%
-70.4% 9118612 perf-stat.i.branch-misses
3.30 perf-stat.i.cpi
+5.1% 1.58e+10 perf-stat.i.instructions
0.31 perf-stat.i.ipc
0.04 perf-stat.overall.MPKI
0.39 perf-stat.overall.branch-miss-rate%
3.28 perf-stat.overall.cpi
0.30 perf-stat.overall.ipc
+3.4% 215312 perf-stat.overall.path-length
+19.2% 2.353e+09 perf-stat.ps.branch-instructions
-70.4% 9109071 perf-stat.ps.branch-misses
+5.1% 1.575e+10 perf-stat.ps.instructions
+4.9% 4.759e+12 perf-stat.total.instructions
11.60 perf-profile.calltrace.cycles-pp.do_syscall_64.entry_SYSCALL_64_after_hwframe.syscall
9.51 perf-profile.calltrace.cycles-pp.__x64_sys_futex.do_syscall_64.entry_SYSCALL_64_after_hwframe.syscall
21.88 perf-profile.calltrace.cycles-pp.entry_SYSCALL_64_after_hwframe.syscall
9.43 perf-profile.calltrace.cycles-pp.entry_SYSCALL_64.syscall
9.02 perf-profile.calltrace.cycles-pp.do_futex.__x64_sys_futex.do_syscall_64.entry_SYSCALL_64_after_hwframe.syscall
7.36 perf-profile.calltrace.cycles-pp.__futex_wait.futex_wait.do_futex.__x64_sys_futex.do_syscall_64
8.63 perf-profile.calltrace.cycles-pp.futex_wait.do_futex.__x64_sys_futex.do_syscall_64.entry_SYSCALL_64_after_hwframe
11.78 perf-profile.children.cycles-pp.do_syscall_64
9.57 perf-profile.children.cycles-pp.__x64_sys_futex
22.20 perf-profile.children.cycles-pp.entry_SYSCALL_64_after_hwframe
0.46 perf-profile.children.cycles-pp.get_futex_key
0.18 ? 2% perf-profile.children.cycles-pp.x64_sys_call
9.29 perf-profile.children.cycles-pp.entry_SYSCALL_64
9.11 perf-profile.children.cycles-pp.do_futex
7.36 perf-profile.children.cycles-pp.__futex_wait
8.70 perf-profile.children.cycles-pp.futex_wait
0.47 perf-profile.self.cycles-pp.__x64_sys_futex
1.27 perf-profile.self.cycles-pp.do_syscall_64
0.44 perf-profile.self.cycles-pp.do_futex
0.32 ? 4% perf-profile.self.cycles-pp.syscall_exit_to_user_mode
0.45 perf-profile.self.cycles-pp.get_futex_key
0.15 ? 2% perf-profile.self.cycles-pp.x64_sys_call
8.12 perf-profile.self.cycles-pp.entry_SYSCALL_64
10.60 perf-profile.self.cycles-pp.entry_SYSCALL_64_after_hwframe
0.94 ? 3% perf-profile.self.cycles-pp.__futex_wait
*************************************************************************
threads 2 sockets Intel(R) Xeon(R) Gold 6346 CPU @ 3.10GHz (Ice Lake) with 256G memory
===============================================================
disk/fs/kconfig/nr_threads/rootfs/tbox_group/test/testcase/testtime:
btrfs/x86_64-rhel-8.3/100%/debian-12-x86_64-20240206.cgz/lkp-icl-2sp8/utime/stress-ng/60s
Change commas to semicolons in 'spectre_v2' sysfs file")
Don't force use of indirect calls for system calls")
1e3ad78334a69b36e107232e337
---------------------------
%stddev
\
+20.6% 164016 ? 11% meminfo.DirectMap4k
+1.5% 5.598e+10 perf-stat.i.branch-instructions
+1.5% 5.508e+10 perf-stat.ps.branch-instructions
+35.5% 185722 ? 7% numa-numastat.node0.local_node
22060 ? 77% numa-numastat.node0.other_node
-17.6% 238445 ? 6% numa-numastat.node1.local_node
44264 ? 38% numa-numastat.node1.other_node
+35.6% 185165 ? 7% numa-vmstat.node0.numa_local
22060 ? 77% numa-vmstat.node0.numa_other
-17.7% 237526 ? 6% numa-vmstat.node1.numa_local
44264 ? 38% numa-vmstat.node1.numa_other
1.18 perf-profile.calltrace.cycles-pp.mnt_want_write.vfs_utimes.do_utimes.__x64_sys_utimensat.do_syscall_64
42.68 perf-profile.calltrace.cycles-pp.user_path_at_empty.do_utimes.__x64_sys_utimensat.do_syscall_64.entry_SYSCALL_64_after_hwframe
23.34 perf-profile.calltrace.cycles-pp.do_utimes.__x64_sys_utimensat.do_syscall_64.entry_SYSCALL_64_after_hwframe.utimensat
26.27 perf-profile.calltrace.cycles-pp.__x64_sys_utimensat.do_syscall_64.entry_SYSCALL_64_after_hwframe.utimensat
16.00 perf-profile.calltrace.cycles-pp.do_utimes.__x64_sys_utime.do_syscall_64.entry_SYSCALL_64_after_hwframe.syscall
13.68 perf-profile.calltrace.cycles-pp.user_path_at_empty.do_utimes.__x64_sys_utime.do_syscall_64.entry_SYSCALL_64_after_hwframe
38.87 perf-profile.calltrace.cycles-pp.do_utimes.__x64_sys_utimensat.do_syscall_64.entry_SYSCALL_64_after_hwframe
16.56 perf-profile.calltrace.cycles-pp.__x64_sys_utime.do_syscall_64.entry_SYSCALL_64_after_hwframe.syscall
15.58 perf-profile.calltrace.cycles-pp.filename_lookup.user_path_at_empty.do_utimes.__x64_sys_utimensat.do_syscall_64
10.37 perf-profile.calltrace.cycles-pp.getname_flags.user_path_at_empty.do_utimes.__x64_sys_utime.do_syscall_64
13.60 perf-profile.calltrace.cycles-pp.path_lookupat.filename_lookup.user_path_at_empty.do_utimes.__x64_sys_utimensat
9.31 perf-profile.calltrace.cycles-pp.strncpy_from_user.getname_flags.user_path_at_empty.do_utimes.__x64_sys_utime
29.32 perf-profile.calltrace.cycles-pp.utimensat
25.05 perf-profile.calltrace.cycles-pp.getname_flags.user_path_at_empty.do_utimes.__x64_sys_utimensat.do_syscall_64
21.62 perf-profile.calltrace.cycles-pp.strncpy_from_user.getname_flags.user_path_at_empty.do_utimes.__x64_sys_utimensat
27.35 perf-profile.calltrace.cycles-pp.entry_SYSCALL_64_after_hwframe.utimensat
43.77 perf-profile.calltrace.cycles-pp.__x64_sys_utimensat.do_syscall_64.entry_SYSCALL_64_after_hwframe
17.13 perf-profile.calltrace.cycles-pp.entry_SYSCALL_64_after_hwframe.syscall
27.11 perf-profile.calltrace.cycles-pp.do_syscall_64.entry_SYSCALL_64_after_hwframe.utimensat
17.00 perf-profile.calltrace.cycles-pp.do_syscall_64.entry_SYSCALL_64_after_hwframe.syscall
17.93 perf-profile.calltrace.cycles-pp.syscall
3.76 perf-profile.calltrace.cycles-pp.__check_object_size.strncpy_from_user.getname_flags.user_path_at_empty.do_utimes
0.54 perf-profile.calltrace.cycles-pp.syscall_exit_to_user_mode.do_syscall_64.entry_SYSCALL_64_after_hwframe
1.58 perf-profile.calltrace.cycles-pp.check_heap_object.__check_object_size.strncpy_from_user.getname_flags.user_path_at_empty
2.88 perf-profile.calltrace.cycles-pp.filename_lookup.user_path_at_empty.do_utimes.__x64_sys_utime.do_syscall_64
2.40 perf-profile.calltrace.cycles-pp.path_lookupat.filename_lookup.user_path_at_empty.do_utimes.__x64_sys_utime
45.96 perf-profile.calltrace.cycles-pp.entry_SYSCALL_64_after_hwframe
45.45 perf-profile.calltrace.cycles-pp.do_syscall_64.entry_SYSCALL_64_after_hwframe
78.54 perf-profile.children.cycles-pp.do_utimes
56.56 perf-profile.children.cycles-pp.user_path_at_empty
70.29 perf-profile.children.cycles-pp.__x64_sys_utimensat
36.49 perf-profile.children.cycles-pp.getname_flags
31.45 perf-profile.children.cycles-pp.strncpy_from_user
19.91 perf-profile.children.cycles-pp.filename_lookup
17.50 perf-profile.children.cycles-pp.path_lookupat
16.60 perf-profile.children.cycles-pp.__x64_sys_utime
29.40 perf-profile.children.cycles-pp.utimensat
18.25 perf-profile.children.cycles-pp.syscall
19.22 perf-profile.children.cycles-pp.vfs_utimes
4.40 perf-profile.children.cycles-pp.__check_object_size
1.26 perf-profile.children.cycles-pp.syscall_exit_to_user_mode
3.34 perf-profile.children.cycles-pp.walk_component
2.52 perf-profile.children.cycles-pp.lookup_fast
2.04 perf-profile.children.cycles-pp.__d_lookup_rcu
2.30 perf-profile.children.cycles-pp.check_heap_object
2.41 perf-profile.children.cycles-pp.complete_walk
1.05 perf-profile.children.cycles-pp.make_vfsuid
1.28 perf-profile.children.cycles-pp.path_put
0.88 perf-profile.children.cycles-pp.syscall_return_via_sysret
0.63 perf-profile.children.cycles-pp.x64_sys_call
27.02 perf-profile.self.cycles-pp.strncpy_from_user
1.22 perf-profile.self.cycles-pp.do_syscall_64
0.23 perf-profile.self.cycles-pp.may_setattr
0.15 ? 3% perf-profile.self.cycles-pp.__x64_sys_utime
0.88 perf-profile.self.cycles-pp.syscall_return_via_sysret
1.04 perf-profile.self.cycles-pp.__x64_sys_utimensat
0.55 perf-profile.self.cycles-pp.x64_sys_call
*************************************************************************
threads 2 sockets Intel(R) Xeon(R) Gold 6346 CPU @ 3.10GHz (Ice Lake) with 256G memory
===============================================================
kconfig/nr_threads/rootfs/tbox_group/test/testcase/testtime:
4-rhel-8.3/100%/debian-12-x86_64-20240206.cgz/lkp-icl-2sp7/readahead/stress-ng/60s
Change commas to semicolons in 'spectre_v2' sysfs file")
Don't force use of indirect calls for system calls")
1e3ad78334a69b36e107232e337
---------------------------
%stddev
\
+2.8% 5.787e+10 perf-stat.i.branch-instructions
+2.8% 5.695e+10 perf-stat.ps.branch-instructions
75281 ? 12% sched_debug.cfs_rq:/.avg_vruntime.stddev
75281 ? 12% sched_debug.cfs_rq:/.min_vruntime.stddev
45.74 perf-profile.calltrace.cycles-pp.vfs_read.__x64_sys_pread64.do_syscall_64.entry_SYSCALL_64_after_hwframe.__libc_pread
35.38 perf-profile.calltrace.cycles-pp.filemap_read.vfs_read.__x64_sys_pread64.do_syscall_64.entry_SYSCALL_64_after_hwframe
19.90 perf-profile.calltrace.cycles-pp._copy_to_iter.copy_page_to_iter.filemap_read.vfs_read.__x64_sys_pread64
20.54 perf-profile.calltrace.cycles-pp.copy_page_to_iter.filemap_read.vfs_read.__x64_sys_pread64.do_syscall_64
1.58 perf-profile.calltrace.cycles-pp.__fdget.ksys_readahead.do_syscall_64.entry_SYSCALL_64_after_hwframe.readahead
0.60 ? 2% perf-profile.calltrace.cycles-pp.syscall_exit_to_user_mode.do_syscall_64.entry_SYSCALL_64_after_hwframe.readahead.stress_run
0.58 ? 2% perf-profile.calltrace.cycles-pp.syscall_exit_to_user_mode.do_syscall_64.entry_SYSCALL_64_after_hwframe.readahead
4.25 perf-profile.calltrace.cycles-pp.__fsnotify_parent.vfs_read.__x64_sys_pread64.do_syscall_64.entry_SYSCALL_64_after_hwframe
2.16 perf-profile.calltrace.cycles-pp.touch_atime.filemap_read.vfs_read.__x64_sys_pread64.do_syscall_64
1.85 perf-profile.calltrace.cycles-pp.atime_needs_update.touch_atime.filemap_read.vfs_read.__x64_sys_pread64
4.68 ? 3% perf-profile.calltrace.cycles-pp.entry_SYSCALL_64_after_hwframe.readahead
4.05 ? 3% perf-profile.calltrace.cycles-pp.do_syscall_64.entry_SYSCALL_64_after_hwframe.readahead
45.94 perf-profile.children.cycles-pp.vfs_read
47.71 perf-profile.children.cycles-pp.__x64_sys_pread64
35.68 perf-profile.children.cycles-pp.filemap_read
19.96 perf-profile.children.cycles-pp._copy_to_iter
20.64 perf-profile.children.cycles-pp.copy_page_to_iter
55.60 perf-profile.children.cycles-pp.__libc_pread
24.48 perf-profile.children.cycles-pp.stress_readahead
2.46 perf-profile.children.cycles-pp.syscall_exit_to_user_mode
4.45 perf-profile.children.cycles-pp.ksys_readahead
5.28 perf-profile.children.cycles-pp.entry_SYSRETQ_unsafe_stack
4.36 perf-profile.children.cycles-pp.__fsnotify_parent
2.26 perf-profile.children.cycles-pp.touch_atime
2.04 perf-profile.children.cycles-pp.atime_needs_update
0.05 ? 8% perf-profile.children.cycles-pp.ktime_get_update_offsets_now
0.81 perf-profile.children.cycles-pp.posix_fadvise
60.27 perf-profile.children.cycles-pp.entry_SYSCALL_64_after_hwframe
58.60 perf-profile.children.cycles-pp.do_syscall_64
19.32 perf-profile.children.cycles-pp.readahead
1.22 perf-profile.children.cycles-pp.x64_sys_call
19.76 perf-profile.self.cycles-pp._copy_to_iter
24.08 perf-profile.self.cycles-pp.stress_readahead
2.47 perf-profile.self.cycles-pp.do_syscall_64
4.80 perf-profile.self.cycles-pp.filemap_read
5.11 perf-profile.self.cycles-pp.entry_SYSRETQ_unsafe_stack
4.22 perf-profile.self.cycles-pp.__fsnotify_parent
0.05 ? 7% perf-profile.self.cycles-pp.ktime_get_update_offsets_now
1.80 perf-profile.self.cycles-pp.entry_SYSCALL_64_after_hwframe
0.72 perf-profile.self.cycles-pp.__x64_sys_pread64
1.06 perf-profile.self.cycles-pp.x64_sys_call
*************************************************************************
threads 2 sockets Intel(R) Xeon(R) Gold 6346 CPU @ 3.10GHz (Ice Lake) with 256G memory
===============================================================
kconfig/nr_threads/rootfs/tbox_group/test/testcase/testtime:
4-rhel-8.3/100%/debian-12-x86_64-20240206.cgz/lkp-icl-2sp7/null/stress-ng/60s
Change commas to semicolons in 'spectre_v2' sysfs file")
Don't force use of indirect calls for system calls")
1e3ad78334a69b36e107232e337
---------------------------
%stddev
\
31762 ? 28% sched_debug.cpu.nr_switches.max
4595 ? 21% sched_debug.cpu.nr_switches.stddev
3569 ? 9% vmstat.system.cs
-0.9% 160961 vmstat.system.in
-3.7% 6068707 proc-vmstat.numa_hit
-3.8% 6002419 proc-vmstat.numa_local
-3.7% 6107478 proc-vmstat.pgalloc_normal
-3.7% 5941105 proc-vmstat.pgfault
-3.8% 5913179 proc-vmstat.pgfree
-3.3% 18627 stress-ng.null.MB_per_sec_/dev/null_write_rate
-4.0% 2.787e+09 stress-ng.null.ops
-4.0% 46449880 stress-ng.null.ops_per_sec
-3.9% 5580207 stress-ng.time.minor_page_faults
2431 stress-ng.time.system_time
1289 stress-ng.time.user_time
+18.8% 4.19e+10 perf-stat.i.branch-instructions
0.19 ? 3% perf-stat.i.branch-miss-rate%
-9.4% 77223454 ? 3% perf-stat.i.branch-misses
3529 ? 10% perf-stat.i.context-switches
1.00 perf-stat.i.cpi
+2.7% 1.949e+11 perf-stat.i.instructions
1.00 perf-stat.i.ipc
3.03 perf-stat.i.metric.K/sec
-3.8% 96871 perf-stat.i.minor-faults
-3.8% 96871 perf-stat.i.page-faults
0.18 ? 3% perf-stat.overall.branch-miss-rate%
1.00 perf-stat.overall.cpi
1.00 perf-stat.overall.ipc
+18.7% 4.121e+10 perf-stat.ps.branch-instructions
-9.8% 75603241 ? 3% perf-stat.ps.branch-misses
3457 ? 10% perf-stat.ps.context-switches
+2.7% 1.916e+11 perf-stat.ps.instructions
-3.8% 95242 perf-stat.ps.minor-faults
-3.8% 95242 perf-stat.ps.page-faults
+2.6% 1.169e+13 perf-stat.total.instructions
4.62 perf-profile.calltrace.cycles-pp.entry_SYSCALL_64.llseek
4.74 perf-profile.calltrace.cycles-pp.vfs_write.ksys_write.do_syscall_64.entry_SYSCALL_64_after_hwframe.write
3.12 perf-profile.calltrace.cycles-pp.entry_SYSCALL_64.ioctl
3.13 perf-profile.calltrace.cycles-pp.setfl.do_fcntl.__x64_sys_fcntl.do_syscall_64.entry_SYSCALL_64_after_hwframe
3.17 perf-profile.calltrace.cycles-pp.entry_SYSCALL_64.fallocate64
2.36 perf-profile.calltrace.cycles-pp.do_vfs_ioctl.__x64_sys_ioctl.do_syscall_64.entry_SYSCALL_64_after_hwframe.ioctl
2.21 perf-profile.calltrace.cycles-pp.do_fcntl.__x64_sys_fcntl.do_syscall_64.entry_SYSCALL_64_after_hwframe
2.01 perf-profile.calltrace.cycles-pp.entry_SYSCALL_64
0.75 ? 2% perf-profile.calltrace.cycles-pp.syscall_exit_to_user_mode.do_syscall_64.entry_SYSCALL_64_after_hwframe
0.76 ? 2% perf-profile.calltrace.cycles-pp.syscall_exit_to_user_mode.do_syscall_64.entry_SYSCALL_64_after_hwframe.llseek
0.80 perf-profile.calltrace.cycles-pp.syscall_exit_to_user_mode.do_syscall_64.entry_SYSCALL_64_after_hwframe.llseek.stress_run
1.55 perf-profile.calltrace.cycles-pp.entry_SYSCALL_64.write
0.79 ? 2% perf-profile.calltrace.cycles-pp.syscall_exit_to_user_mode.do_syscall_64.entry_SYSCALL_64_after_hwframe.stress_run
2.33 perf-profile.calltrace.cycles-pp.do_fcntl.__x64_sys_fcntl.do_syscall_64.entry_SYSCALL_64_after_hwframe.stress_run
1.20 perf-profile.calltrace.cycles-pp.__put_user_4.do_vfs_ioctl.__x64_sys_ioctl.do_syscall_64.entry_SYSCALL_64_after_hwframe
0.52 perf-profile.calltrace.cycles-pp.syscall_exit_to_user_mode.do_syscall_64.entry_SYSCALL_64_after_hwframe.ioctl
1.40 perf-profile.calltrace.cycles-pp._raw_spin_lock.setfl.do_fcntl.__x64_sys_fcntl.do_syscall_64
0.58 perf-profile.calltrace.cycles-pp.syscall_exit_to_user_mode.do_syscall_64.entry_SYSCALL_64_after_hwframe.fallocate64
0.91 ? 2% perf-profile.calltrace.cycles-pp.__fdget_raw.__x64_sys_fcntl.do_syscall_64.entry_SYSCALL_64_after_hwframe.stress_run
3.19 perf-profile.calltrace.cycles-pp.__x64_sys_fallocate.do_syscall_64.entry_SYSCALL_64_after_hwframe.fallocate64
1.60 ? 2% perf-profile.calltrace.cycles-pp.entry_SYSCALL_64_after_hwframe.fdatasync
0.83 perf-profile.calltrace.cycles-pp.__fdget.__x64_sys_fallocate.do_syscall_64.entry_SYSCALL_64_after_hwframe.fallocate64
1.29 ? 2% perf-profile.calltrace.cycles-pp.do_syscall_64.entry_SYSCALL_64_after_hwframe.fdatasync
1.55 ? 2% perf-profile.calltrace.cycles-pp.entry_SYSCALL_64_after_hwframe.fdatasync.stress_run
1.35 ? 2% perf-profile.calltrace.cycles-pp.do_syscall_64.entry_SYSCALL_64_after_hwframe.fdatasync.stress_run
4.08 ? 2% perf-profile.calltrace.cycles-pp.do_syscall_64.entry_SYSCALL_64_after_hwframe.write.stress_run
4.14 perf-profile.calltrace.cycles-pp.do_syscall_64.entry_SYSCALL_64_after_hwframe.ioctl
1.55 ? 2% perf-profile.calltrace.cycles-pp.__fdget.__x64_sys_ioctl.do_syscall_64.entry_SYSCALL_64_after_hwframe.ioctl
4.31 perf-profile.calltrace.cycles-pp.do_syscall_64.entry_SYSCALL_64_after_hwframe.llseek
4.91 perf-profile.calltrace.cycles-pp.entry_SYSCALL_64_after_hwframe.ioctl.stress_run
4.36 perf-profile.calltrace.cycles-pp.do_syscall_64.entry_SYSCALL_64_after_hwframe.ioctl.stress_run
4.91 perf-profile.calltrace.cycles-pp.do_syscall_64.entry_SYSCALL_64_after_hwframe.fallocate64
5.40 perf-profile.calltrace.cycles-pp.entry_SYSCALL_64_after_hwframe.fallocate64
4.54 ? 2% perf-profile.calltrace.cycles-pp.do_syscall_64.entry_SYSCALL_64_after_hwframe.llseek.stress_run
7.07 perf-profile.calltrace.cycles-pp.do_syscall_64.entry_SYSCALL_64_after_hwframe.stress_run
0.58 ? 2% perf-profile.calltrace.cycles-pp.__x64_sys_fdatasync.do_syscall_64.entry_SYSCALL_64_after_hwframe.fdatasync.stress_run
0.55 ? 2% perf-profile.calltrace.cycles-pp.__x64_sys_fdatasync.do_syscall_64.entry_SYSCALL_64_after_hwframe.fdatasync
7.61 perf-profile.children.cycles-pp.syscall_exit_to_user_mode
15.94 perf-profile.children.cycles-pp.entry_SYSCALL_64
15.80 perf-profile.children.cycles-pp.entry_SYSRETQ_unsafe_stack
4.83 perf-profile.children.cycles-pp.do_fcntl
4.95 perf-profile.children.cycles-pp.vfs_write
9.31 perf-profile.children.cycles-pp.__x64_sys_fcntl
3.40 perf-profile.children.cycles-pp.setfl
2.48 perf-profile.children.cycles-pp.do_vfs_ioctl
2.47 perf-profile.children.cycles-pp.stress_null
1.80 perf-profile.children.cycles-pp.amd_clear_divider
1.65 perf-profile.children.cycles-pp.__libc_fcntl64
1.30 perf-profile.children.cycles-pp.__put_user_4
1.49 perf-profile.children.cycles-pp._raw_spin_lock
0.39 perf-profile.children.cycles-pp.__munmap
0.37 perf-profile.children.cycles-pp.__vm_munmap
0.37 perf-profile.children.cycles-pp.__x64_sys_munmap
0.36 perf-profile.children.cycles-pp.do_vmi_align_munmap
2.41 perf-profile.children.cycles-pp.syscall_exit_to_user_mode_prepare
0.38 perf-profile.children.cycles-pp.do_vmi_munmap
0.28 perf-profile.children.cycles-pp.unmap_region
0.22 ? 2% perf-profile.children.cycles-pp.asm_exc_page_fault
0.29 perf-profile.children.cycles-pp.__mmap
0.19 perf-profile.children.cycles-pp.do_user_addr_fault
0.52 perf-profile.children.cycles-pp.fcntl64@plt
0.72 perf-profile.children.cycles-pp.security_file_fcntl
0.27 perf-profile.children.cycles-pp.vm_mmap_pgoff
0.25 perf-profile.children.cycles-pp.do_mmap
0.20 ? 2% perf-profile.children.cycles-pp.exc_page_fault
0.18 ? 2% perf-profile.children.cycles-pp.mmap_region
0.54 perf-profile.children.cycles-pp.null_lseek
0.51 perf-profile.children.cycles-pp.security_file_ioctl
0.16 ? 2% perf-profile.children.cycles-pp.handle_mm_fault
0.13 ? 2% perf-profile.children.cycles-pp.tlb_finish_mmu
0.15 ? 3% perf-profile.children.cycles-pp.__handle_mm_fault
0.10 perf-profile.children.cycles-pp.__tlb_batch_free_encoded_pages
0.06 perf-profile.children.cycles-pp.__anon_vma_prepare
3.35 perf-profile.children.cycles-pp.__x64_sys_fallocate
7.51 perf-profile.children.cycles-pp.fdatasync
4.23 perf-profile.children.cycles-pp.syscall_return_via_sysret
1.22 perf-profile.children.cycles-pp.__x64_sys_fdatasync
3.35 ? 2% perf-profile.children.cycles-pp.__fdget
53.71 perf-profile.children.cycles-pp.entry_SYSCALL_64_after_hwframe
48.87 perf-profile.children.cycles-pp.do_syscall_64
3.40 perf-profile.children.cycles-pp.x64_sys_call
7.68 perf-profile.self.cycles-pp.do_syscall_64
15.27 perf-profile.self.cycles-pp.entry_SYSRETQ_unsafe_stack
5.20 perf-profile.self.cycles-pp.entry_SYSCALL_64_after_hwframe
4.98 perf-profile.self.cycles-pp.entry_SYSCALL_64
4.49 perf-profile.self.cycles-pp.llseek
4.10 perf-profile.self.cycles-pp.ioctl
4.22 perf-profile.self.cycles-pp.syscall_exit_to_user_mode
1.84 perf-profile.self.cycles-pp.stress_null
1.93 perf-profile.self.cycles-pp.fdatasync
2.10 perf-profile.self.cycles-pp.fallocate64
1.94 perf-profile.self.cycles-pp.setfl
1.26 perf-profile.self.cycles-pp.__put_user_4
1.47 perf-profile.self.cycles-pp.do_fcntl
1.14 ? 2% perf-profile.self.cycles-pp.do_vfs_ioctl
1.29 perf-profile.self.cycles-pp._raw_spin_lock
2.26 perf-profile.self.cycles-pp.__x64_sys_fcntl
1.93 perf-profile.self.cycles-pp.syscall_exit_to_user_mode_prepare
0.94 perf-profile.self.cycles-pp.amd_clear_divider
0.54 perf-profile.self.cycles-pp.security_file_fcntl
0.37 perf-profile.self.cycles-pp.fcntl64@plt
0.29 perf-profile.self.cycles-pp.rw_verify_area
0.35 perf-profile.self.cycles-pp.security_file_ioctl
0.48 ? 2% perf-profile.self.cycles-pp.__x64_sys_fallocate
0.37 ? 6% perf-profile.self.cycles-pp.__x64_sys_fdatasync
4.23 perf-profile.self.cycles-pp.syscall_return_via_sysret
1.66 ? 2% perf-profile.self.cycles-pp.__fdget_raw
3.06 ? 2% perf-profile.self.cycles-pp.__fdget
2.89 perf-profile.self.cycles-pp.x64_sys_call
*************************************************************************
threads 2 sockets Intel(R) Xeon(R) Gold 6346 CPU @ 3.10GHz (Ice Lake) with 256G memory
===============================================================
kconfig/nr_threads/rootfs/tbox_group/test/testcase/testtime:
4-rhel-8.3/100%/debian-12-x86_64-20240206.cgz/lkp-icl-2sp7/monte-carlo/stress-ng/60s
Change commas to semicolons in 'spectre_v2' sysfs file")
Don't force use of indirect calls for system calls")
1e3ad78334a69b36e107232e337
---------------------------
%stddev
\
1.62 perf-stat.overall.branch-miss-rate%
+1.2% 1.427e+13 perf-stat.total.instructions
-1.6% 2793803 stress-ng.monte-carlo.samples/sec,_e_using_arc4
-1.2% 7036665 stress-ng.monte-carlo.samples/sec,_exp_using_arc4
-1.5% 3911813 stress-ng.monte-carlo.samples/sec,_pi_using_arc4
-1.3% 1.004e+08 stress-ng.monte-carlo.samples/sec,_pi_using_lcg
-1.4% 6319313 stress-ng.monte-carlo.samples/sec,_sin_using_arc4
-1.3% 7277983 stress-ng.monte-carlo.samples/sec,_sqrt_using_arc4
-1.5% 3904274 stress-ng.monte-carlo.samples/sec,_squircle_using_arc4
1128 stress-ng.time.system_time
2.69 perf-profile.calltrace.cycles-pp.syscall_exit_to_user_mode.do_syscall_64.entry_SYSCALL_64_after_hwframe.__getpid.stress_mc_arc4_rand
3.16 ? 2% perf-profile.calltrace.cycles-pp.__x64_sys_getpid.do_syscall_64.entry_SYSCALL_64_after_hwframe.__getpid.stress_mc_arc4_rand
2.71 ? 3% perf-profile.calltrace.cycles-pp.__task_pid_nr_ns.__x64_sys_getpid.do_syscall_64.entry_SYSCALL_64_after_hwframe.__getpid
17.52 perf-profile.calltrace.cycles-pp.entry_SYSCALL_64.__getpid.stress_mc_arc4_rand
0.91 perf-profile.calltrace.cycles-pp.syscall_exit_to_user_mode_prepare.syscall_exit_to_user_mode.do_syscall_64.entry_SYSCALL_64_after_hwframe.__getpid
3.10 perf-profile.calltrace.cycles-pp.stress_mc_mwc64_rand
2.04 perf-profile.calltrace.cycles-pp.stress_mwc64.stress_mc_mwc64_rand
0.53 perf-profile.calltrace.cycles-pp.stress_monte_carlo_sqrt.stress_mc_arc4_rand
43.65 perf-profile.calltrace.cycles-pp.stress_mc_arc4_rand
34.58 perf-profile.calltrace.cycles-pp.__getpid.stress_mc_arc4_rand
14.33 perf-profile.calltrace.cycles-pp.entry_SYSCALL_64_after_hwframe.__getpid.stress_mc_arc4_rand
11.40 perf-profile.calltrace.cycles-pp.do_syscall_64.entry_SYSCALL_64_after_hwframe.__getpid.stress_mc_arc4_rand
1.38 perf-profile.calltrace.cycles-pp.x64_sys_call.do_syscall_64.entry_SYSCALL_64_after_hwframe.__getpid.stress_mc_arc4_rand
3.58 perf-profile.children.cycles-pp.syscall_exit_to_user_mode
3.61 ? 2% perf-profile.children.cycles-pp.__x64_sys_getpid
2.93 ? 3% perf-profile.children.cycles-pp.__task_pid_nr_ns
7.76 perf-profile.children.cycles-pp.entry_SYSRETQ_unsafe_stack
4.37 perf-profile.children.cycles-pp.stress_mc_xorshift_rand
1.13 perf-profile.children.cycles-pp.syscall_exit_to_user_mode_prepare
2.06 perf-profile.children.cycles-pp.stress_monte_carlo_pi
2.35 perf-profile.children.cycles-pp.stress_monte_carlo_sqrt
2.29 perf-profile.children.cycles-pp.stress_mwc64
35.66 perf-profile.children.cycles-pp.__getpid
28.32 perf-profile.children.cycles-pp.entry_SYSCALL_64_after_hwframe
25.84 perf-profile.children.cycles-pp.do_syscall_64
1.61 perf-profile.children.cycles-pp.x64_sys_call
3.68 perf-profile.self.cycles-pp.do_syscall_64
2.69 ? 3% perf-profile.self.cycles-pp.__task_pid_nr_ns
7.52 perf-profile.self.cycles-pp.entry_SYSRETQ_unsafe_stack
2.00 perf-profile.self.cycles-pp.syscall_exit_to_user_mode
0.90 perf-profile.self.cycles-pp.syscall_exit_to_user_mode_prepare
2.72 perf-profile.self.cycles-pp.stress_mc_xorshift_rand
1.60 perf-profile.self.cycles-pp.stress_monte_carlo_pi
2.02 perf-profile.self.cycles-pp.stress_mwc64
1.37 perf-profile.self.cycles-pp.x64_sys_call
*************************************************************************
threads 2 sockets Intel(R) Xeon(R) Gold 6346 CPU @ 3.10GHz (Ice Lake) with 256G memory
===============================================================
disk/fs/kconfig/nr_threads/rootfs/tbox_group/test/testcase/testtime:
ext4/x86_64-rhel-8.3/100%/debian-12-x86_64-20240206.cgz/lkp-icl-2sp8/fpunch/stress-ng/60s
Change commas to semicolons in 'spectre_v2' sysfs file")
Don't force use of indirect calls for system calls")
1e3ad78334a69b36e107232e337
---------------------------
%stddev
\
+4.9% 4.623e+10 perf-stat.i.branch-instructions
0.19 ? 3% perf-stat.overall.branch-miss-rate%
+4.9% 4.547e+10 perf-stat.ps.branch-instructions
-1.6% 1.037e+08 stress-ng.fpunch.ops
-1.6% 1727644 stress-ng.fpunch.ops_per_sec
-2.0% 861604 stress-ng.time.voluntary_context_switches
38.29 perf-profile.calltrace.cycles-pp.vfs_write.__x64_sys_pwrite64.do_syscall_64.entry_SYSCALL_64_after_hwframe.__libc_pwrite
31.30 perf-profile.calltrace.cycles-pp.generic_file_write_iter.vfs_write.__x64_sys_pwrite64.do_syscall_64.entry_SYSCALL_64_after_hwframe
40.04 perf-profile.calltrace.cycles-pp.__x64_sys_pwrite64.do_syscall_64.entry_SYSCALL_64_after_hwframe.__libc_pwrite
19.48 perf-profile.calltrace.cycles-pp.vfs_write.ksys_write.do_syscall_64.entry_SYSCALL_64_after_hwframe.write
21.94 perf-profile.calltrace.cycles-pp.ksys_write.do_syscall_64.entry_SYSCALL_64_after_hwframe.write
16.01 perf-profile.calltrace.cycles-pp.generic_file_write_iter.vfs_write.ksys_write.do_syscall_64.entry_SYSCALL_64_after_hwframe
25.87 perf-profile.calltrace.cycles-pp.write
23.11 perf-profile.calltrace.cycles-pp.entry_SYSCALL_64_after_hwframe.write
47.50 perf-profile.calltrace.cycles-pp.__libc_pwrite
0.34 ? 70% perf-profile.calltrace.cycles-pp.__mutex_unlock_slowpath.ksys_write.do_syscall_64.entry_SYSCALL_64_after_hwframe.write
1.98 perf-profile.calltrace.cycles-pp.up_write.generic_file_write_iter.vfs_write.__x64_sys_pwrite64.do_syscall_64
1.28 perf-profile.calltrace.cycles-pp.rwsem_wake.up_write.generic_file_write_iter.vfs_write.__x64_sys_pwrite64
0.59 perf-profile.calltrace.cycles-pp.syscall_exit_to_user_mode.do_syscall_64.entry_SYSCALL_64_after_hwframe.__libc_pwrite
2.58 perf-profile.calltrace.cycles-pp.simple_write_end.generic_perform_write.generic_file_write_iter.vfs_write.__x64_sys_pwrite64
0.99 perf-profile.calltrace.cycles-pp.up_write.generic_file_write_iter.vfs_write.ksys_write.do_syscall_64
0.64 perf-profile.calltrace.cycles-pp.rwsem_wake.up_write.generic_file_write_iter.vfs_write.ksys_write
1.46 perf-profile.calltrace.cycles-pp.simple_write_end.generic_perform_write.generic_file_write_iter.vfs_write.ksys_write
0.64 perf-profile.calltrace.cycles-pp.security_file_permission.rw_verify_area.vfs_write.ksys_write.do_syscall_64
1.08 perf-profile.calltrace.cycles-pp.vfs_fallocate.__x64_sys_fallocate.do_syscall_64.entry_SYSCALL_64_after_hwframe.syscall
0.91 perf-profile.calltrace.cycles-pp.__fdget.__x64_sys_pwrite64.do_syscall_64.entry_SYSCALL_64_after_hwframe.__libc_pwrite
1.71 perf-profile.calltrace.cycles-pp.__x64_sys_fallocate.do_syscall_64.entry_SYSCALL_64_after_hwframe.syscall
0.82 perf-profile.calltrace.cycles-pp.__fdget.__x64_sys_fallocate.do_syscall_64.entry_SYSCALL_64_after_hwframe.fallocate64
3.18 perf-profile.calltrace.cycles-pp.__x64_sys_fallocate.do_syscall_64.entry_SYSCALL_64_after_hwframe.fallocate64
5.85 perf-profile.calltrace.cycles-pp.syscall
2.60 perf-profile.calltrace.cycles-pp.do_syscall_64.entry_SYSCALL_64_after_hwframe.syscall
2.89 perf-profile.calltrace.cycles-pp.entry_SYSCALL_64_after_hwframe.syscall
10.44 perf-profile.calltrace.cycles-pp.fallocate64
4.74 perf-profile.calltrace.cycles-pp.do_syscall_64.entry_SYSCALL_64_after_hwframe.fallocate64
5.21 perf-profile.calltrace.cycles-pp.entry_SYSCALL_64_after_hwframe.fallocate64
58.23 perf-profile.children.cycles-pp.vfs_write
47.62 perf-profile.children.cycles-pp.generic_file_write_iter
40.17 perf-profile.children.cycles-pp.__x64_sys_pwrite64
22.06 perf-profile.children.cycles-pp.ksys_write
25.96 perf-profile.children.cycles-pp.write
47.65 perf-profile.children.cycles-pp.__libc_pwrite
3.10 perf-profile.children.cycles-pp.up_write
2.52 perf-profile.children.cycles-pp.syscall_exit_to_user_mode
2.00 perf-profile.children.cycles-pp.rwsem_wake
4.27 perf-profile.children.cycles-pp.simple_write_end
1.24 perf-profile.children.cycles-pp.wake_up_q
0.66 perf-profile.children.cycles-pp.wake_q_add
1.03 ? 2% perf-profile.children.cycles-pp.__mutex_unlock_slowpath
0.81 perf-profile.children.cycles-pp.syscall_exit_to_user_mode_prepare
0.73 perf-profile.children.cycles-pp._raw_spin_lock_irqsave
0.62 perf-profile.children.cycles-pp.rwsem_mark_wake
0.79 perf-profile.children.cycles-pp.try_to_wake_up
5.92 perf-profile.children.cycles-pp.syscall
2.29 perf-profile.children.cycles-pp.__fdget
5.10 perf-profile.children.cycles-pp.__x64_sys_fallocate
10.52 perf-profile.children.cycles-pp.fallocate64
1.12 perf-profile.children.cycles-pp.x64_sys_call
2.55 perf-profile.self.cycles-pp.do_syscall_64
4.13 perf-profile.self.cycles-pp.fault_in_readable
1.99 perf-profile.self.cycles-pp.simple_write_end
4.76 perf-profile.self.cycles-pp.vfs_write
1.64 perf-profile.self.cycles-pp.entry_SYSCALL_64_after_hwframe
0.63 perf-profile.self.cycles-pp.wake_q_add
0.70 perf-profile.self.cycles-pp._raw_spin_lock_irqsave
0.66 ? 2% perf-profile.self.cycles-pp.syscall_exit_to_user_mode_prepare
0.48 perf-profile.self.cycles-pp.wake_up_q
0.66 perf-profile.self.cycles-pp.__x64_sys_fallocate
1.05 perf-profile.self.cycles-pp.__fdget_pos
0.68 perf-profile.self.cycles-pp.__x64_sys_pwrite64
2.14 perf-profile.self.cycles-pp.__fdget
0.96 perf-profile.self.cycles-pp.x64_sys_call
estimated based on internal Intel analysis and are provided
purposes only. Any difference in system hardware or software
may affect actual performance.
om/intel/lkp-tests/wiki">https://github.com/intel/lkp-tests/wiki

2024-04-19 07:33:55

by Josh Poimboeuf

[permalink] [raw]

Subject: Re: [linus:master] [x86/syscall] 1e3ad78334: will-it-scale.per_process_ops 1.4% improvement

On Fri, Apr 19, 2024 at 01:49:26PM +0800, kernel test robot wrote:
> Hi Linus,
>
> We noticed that commit 1e3ad78334a6 caused performance fluctuations in
> various micro benchmarks. The perf stat metrics related with branch
> instructions do have noticeable changes, which may be an expected
> result of this commit. We are sending this report to provide these data
> and hope it can be helpful for the awareness of overall impact or any
> further investigation. Thanks.
>
> kernel test robot noticed a 1.4% improvement of will-it-scale.per_process_ops on:
>
> commit: 1e3ad78334a69b36e107232e337f9d693dcc9df2 ("x86/syscall: Don't force use of indirect calls for system calls")
> https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git master

Thanks, these are significant regressions.

Since this is on Skylake (with IBRS enabled, presumably) I'd expect that
these regressions are fixed by my "Only harden syscalls when needed"
patch. I'm planning on posting a new version of that tomorrow, but v3
[*] should be good enough to fix it. Could you run these tests on the
same Skylake system with my patch added?

Also it would be helpful to see the same tests on Cascade/Ice Lake, or
some other system for which the 'spectre_v2' sysfs vulnerabilities file
shows "BHI: SW loop". On such a system it shouldn't matter whether my
patch is added as it won't disable Linus' syscall change. But it would
be very helpful to see the performance impact of that combination.

[*] https://lkml.kernel.org/lkml/eda0ec65f4612cc66875aaf76e738643f41fbc01.1713296762.git.jpoimboe@kernel.org

--
Josh

2024-04-22 07:48:34

by kernel test robot

[permalink] [raw]

Subject: Re: [linus:master] [x86/syscall] 1e3ad78334: will-it-scale.per_process_ops 1.4% improvement

Hi Josh,

On Fri, Apr 19, 2024 at 12:33:46AM -0700, Josh Poimboeuf wrote:
> On Fri, Apr 19, 2024 at 01:49:26PM +0800, kernel test robot wrote:
> > Hi Linus,
> >
> > We noticed that commit 1e3ad78334a6 caused performance fluctuations in
> > various micro benchmarks. The perf stat metrics related with branch
> > instructions do have noticeable changes, which may be an expected
> > result of this commit. We are sending this report to provide these data
> > and hope it can be helpful for the awareness of overall impact or any
> > further investigation. Thanks.
> >
> > kernel test robot noticed a 1.4% improvement of will-it-scale.per_process_ops on:
> >
> > commit: 1e3ad78334a69b36e107232e337f9d693dcc9df2 ("x86/syscall: Don't force use of indirect calls for system calls")
> > https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git master
>
> Thanks, these are significant regressions.

First we need to clarify that by running this specific will-it-scale
futex4 benchmark on a Skylake machine, we observed a +1.4% performance
improvement, not a regression.

> Since this is on Skylake (with IBRS enabled, presumably) I'd expect that
> these regressions are fixed by my "Only harden syscalls when needed"
> patch. I'm planning on posting a new version of that tomorrow, but v3
> [*] should be good enough to fix it. Could you run these tests on the
> same Skylake system with my patch added?

The v3 patch [*] cannot be applied on commit 1e3ad78334a6. Seems the
code base has changed a lot, so we are not able to directly compare
1e3ad78334a6 and 1e3ad78334a6+v3_patch.

The patch is good to apply on v6.9-rc4, so we tested v6.9-rc4 and
v6.9-rc4+v3_patch. Here are the test results for your reference:

Skylake
=========================================================================================
tbox_group/testcase/rootfs/kconfig/compiler/nr_task/mode/test/cpufreq_governor:
lkp-skl-fpga01/will-it-scale/debian-12-x86_64-20240206.cgz/x86_64-rhel-8.3/gcc-13/16/process/futex4/performance

commit:
0cd01ac5dcb1 ("x86/bugs: Change commas to semicolons in 'spectre_v2' sysfs file")
1e3ad78334a6 ("x86/syscall: Don't force use of indirect calls for system calls")
v6.9-rc4
v6.9-rc4+v3_patch

0cd01ac5dcb1 1e3ad78334a6 v6.9-rc4 v6.9-rc4+v3_patch
---------------- --------------------------- --------------------------- ---------------------------
%stddev %change %stddev %change %stddev %change %stddev
\ | \ | \ | \
1362315 +1.4% 1381406 +1.5% 1382652 +0.5% 1369778 will-it-scale.per_process_ops
21797058 +1.4% 22102512 +1.5% 22122442 +0.5% 21916453 will-it-scale.workload
0.04 ? 7% -7.4% 0.04 -6.1% 0.04 ? 2% -4.0% 0.04 perf-stat.i.MPKI
1.98e+09 +19.2% 2.36e+09 +19.2% 2.359e+09 +1.7% 2.014e+09 perf-stat.i.branch-instructions
1.47 -1.2 0.30 -1.2 0.30 ? 3% -0.0 1.45 perf-stat.i.branch-miss-rate%
30820475 -70.4% 9118612 -71.0% 8945551 +0.5% 30985854 perf-stat.i.branch-misses
7767463 -1.2% 7676829 -1.0% 7686158 -1.3% 7664542 perf-stat.i.cache-references
3.45 -4.4% 3.30 -4.4% 3.30 -0.4% 3.43 perf-stat.i.cpi
1.504e+10 +5.1% 1.58e+10 +5.2% 1.582e+10 +1.2% 1.522e+10 perf-stat.i.instructions
0.29 +4.5% 0.31 +4.6% 0.31 +0.4% 0.29 perf-stat.i.ipc
1.01 ?100% -0.6% 1.00 ?100% +104.1% 2.06 +0.3% 1.01 ?100% perf-stat.i.metric.K/sec
0.05 ? 2% -4.2% 0.04 -3.9% 0.04 ? 2% +0.4% 0.05 perf-stat.overall.MPKI
1.56 -1.2 0.39 -1.2 0.38 -0.0 1.54 perf-stat.overall.branch-miss-rate%
3.43 -4.3% 3.28 -4.4% 3.28 -0.5% 3.41 perf-stat.overall.cpi
0.29 +4.5% 0.30 +4.6% 0.30 +0.5% 0.29 perf-stat.overall.ipc
208138 +3.4% 215312 +3.5% 215474 +0.5% 209279 perf-stat.overall.path-length
1.973e+09 +19.2% 2.353e+09 +19.1% 2.351e+09 +1.8% 2.008e+09 perf-stat.ps.branch-instructions
30729762 -70.4% 9109071 -71.0% 8918595 +0.6% 30911752 perf-stat.ps.branch-misses
7745419 -1.1% 7663567 -1.1% 7663740 -1.3% 7647834 perf-stat.ps.cache-references
1.499e+10 +5.1% 1.575e+10 +5.2% 1.577e+10 +1.2% 1.517e+10 perf-stat.ps.instructions
4.537e+12 +4.9% 4.759e+12 +5.1% 4.767e+12 +1.1% 4.587e+12 perf-stat.total.instructions
12.23 -0.6 11.60 -0.6 11.64 -0.0 12.21 perf-profile.calltrace.cycles-pp.do_syscall_64.entry_SYSCALL_64_after_hwframe.syscall
10.09 -0.6 9.51 -0.5 9.56 -0.1 10.01 perf-profile.calltrace.cycles-pp.__x64_sys_futex.do_syscall_64.entry_SYSCALL_64_after_hwframe.syscall
22.31 -0.4 21.88 -0.4 21.94 +0.0 22.36 perf-profile.calltrace.cycles-pp.entry_SYSCALL_64_after_hwframe.syscall
19.15 +0.2 19.30 +0.2 19.38 -0.1 19.04 perf-profile.calltrace.cycles-pp.syscall_return_via_sysret.syscall
9.25 +0.2 9.43 +0.0 9.25 -0.0 9.23 perf-profile.calltrace.cycles-pp.entry_SYSCALL_64.syscall
8.79 +0.2 9.02 +0.3 9.07 -0.1 8.72 perf-profile.calltrace.cycles-pp.do_futex.__x64_sys_futex.do_syscall_64.entry_SYSCALL_64_after_hwframe.syscall
7.13 +0.2 7.36 +0.3 7.41 -0.1 7.07 perf-profile.calltrace.cycles-pp.__futex_wait.futex_wait.do_futex.__x64_sys_futex.do_syscall_64
8.37 +0.3 8.63 +0.3 8.68 -0.1 8.28 perf-profile.calltrace.cycles-pp.futex_wait.do_futex.__x64_sys_futex.do_syscall_64.entry_SYSCALL_64_after_hwframe
12.38 -0.6 11.78 -0.5 11.84 -0.0 12.38 perf-profile.children.cycles-pp.do_syscall_64
10.12 -0.5 9.57 -0.5 9.63 -0.1 10.04 perf-profile.children.cycles-pp.__x64_sys_futex
22.63 -0.4 22.20 -0.4 22.24 +0.0 22.65 perf-profile.children.cycles-pp.entry_SYSCALL_64_after_hwframe
0.48 ? 2% -0.0 0.46 -0.0 0.47 ? 2% -0.0 0.46 perf-profile.children.cycles-pp.get_futex_key
19.34 +0.1 19.49 +0.2 19.57 -0.1 19.24 perf-profile.children.cycles-pp.syscall_return_via_sysret
0.00 +0.2 0.18 ? 2% +0.2 0.18 ? 3% +0.0 0.00 perf-profile.children.cycles-pp.x64_sys_call
9.11 +0.2 9.29 +0.0 9.12 +0.0 9.12 perf-profile.children.cycles-pp.entry_SYSCALL_64
8.88 +0.2 9.11 +0.3 9.16 -0.1 8.81 perf-profile.children.cycles-pp.do_futex
7.13 +0.2 7.36 +0.3 7.41 -0.1 7.07 perf-profile.children.cycles-pp.__futex_wait
8.43 +0.3 8.70 +0.3 8.75 -0.1 8.34 perf-profile.children.cycles-pp.futex_wait
1.20 -0.7 0.47 -0.7 0.46 ? 3% -0.0 1.20 ? 2% perf-profile.self.cycles-pp.__x64_sys_futex
1.46 -0.2 1.27 -0.2 1.26 ? 2% +0.0 1.48 ? 2% perf-profile.self.cycles-pp.do_syscall_64
0.51 -0.1 0.44 -0.1 0.45 ? 2% +0.0 0.52 perf-profile.self.cycles-pp.do_futex
0.38 ? 5% -0.1 0.32 ? 4% -0.1 0.32 ? 5% +0.0 0.39 ? 7% perf-profile.self.cycles-pp.syscall_exit_to_user_mode
0.48 ? 2% -0.0 0.45 -0.0 0.45 ? 2% -0.0 0.46 ? 2% perf-profile.self.cycles-pp.get_futex_key
1.21 +0.0 1.24 ? 2% +0.0 1.23 ? 3% -0.0 1.18 perf-profile.self.cycles-pp.futex_wait
0.09 ? 14% +0.0 0.12 ? 8% +0.0 0.13 ? 6% +0.0 0.12 ? 5% perf-profile.self.cycles-pp.syscall_exit_to_user_mode_prepare
0.00 +0.1 0.15 ? 2% +0.2 0.15 ? 3% +0.0 0.00 perf-profile.self.cycles-pp.x64_sys_call
7.97 +0.1 8.12 -0.0 7.95 -0.0 7.96 perf-profile.self.cycles-pp.entry_SYSCALL_64
19.28 +0.2 19.44 +0.2 19.53 -0.1 19.21 perf-profile.self.cycles-pp.syscall_return_via_sysret
10.43 +0.2 10.60 +0.2 10.59 +0.0 10.46 perf-profile.self.cycles-pp.entry_SYSCALL_64_after_hwframe
0.72 ? 3% +0.2 0.94 ? 3% +0.2 0.93 ? 4% +0.0 0.74 perf-profile.self.cycles-pp.__futex_wait

> Also it would be helpful to see the same tests on Cascade/Ice Lake, or
> some other system for which the 'spectre_v2' sysfs vulnerabilities file
> shows "BHI: SW loop". On such a system it shouldn't matter whether my
> patch is added as it won't disable Linus' syscall change. But it would
> be very helpful to see the performance impact of that combination.

The test results on Cascade/Ice Lake are as follows:

Intel Xeon Platinum 8260L (Cascade Lake)
=========================================================================================
tbox_group/testcase/rootfs/kconfig/compiler/nr_task/mode/test/cpufreq_governor:
lkp-csl-2sp3/will-it-scale/debian-12-x86_64-20240206.cgz/x86_64-rhel-8.3/gcc-13/16/process/futex4/performance

commit:
0cd01ac5dcb1 ("x86/bugs: Change commas to semicolons in 'spectre_v2' sysfs file")
1e3ad78334a6 ("x86/syscall: Don't force use of indirect calls for system calls")
v6.9-rc4
v6.9-rc4+v3_patch

0cd01ac5dcb1 1e3ad78334a6 v6.9-rc4 v6.9-rc4+v3_patch
---------------- --------------------------- --------------------------- ---------------------------
%stddev %change %stddev %change %stddev %change %stddev
\ | \ | \ | \
3237910 -0.3% 3229309 -10.1% 2911031 -11.0% 2882769 will-it-scale.per_process_ops
51806565 -0.3% 51668961 -10.1% 46576504 -11.0% 46124311 will-it-scale.workload
0.02 ? 7% -6.4% 0.02 ? 3% -9.5% 0.02 ? 2% -2.4% 0.02 ? 12% perf-stat.i.MPKI
4.649e+09 +17.4% 5.459e+09 +76.1% 8.186e+09 +75.4% 8.156e+09 perf-stat.i.branch-instructions
0.72 -0.6 0.15 ? 4% -0.6 0.12 -0.6 0.12 ? 2% perf-stat.i.branch-miss-rate%
34188248 -74.0% 8872232 ? 3% -69.9% 10285664 -70.0% 10244122 perf-stat.i.branch-misses
1.70 -4.2% 1.63 -8.0% 1.56 -8.3% 1.56 perf-stat.i.cpi
3.326e+10 +3.6% 3.444e+10 +9.1% 3.628e+10 +8.2% 3.599e+10 perf-stat.i.instructions
0.59 +4.3% 0.61 +8.7% 0.64 +9.0% 0.64 perf-stat.i.ipc
0.18 ? 16% -11.5% 0.16 ? 22% -33.9% 0.12 ? 46% -58.6% 0.08 ? 49% perf-stat.i.major-faults
0.02 ? 7% -6.3% 0.02 ? 4% -11.0% 0.02 ? 3% -2.3% 0.02 ? 13% perf-stat.overall.MPKI
0.74 -0.6 0.16 ? 3% -0.6 0.13 -0.6 0.13 perf-stat.overall.branch-miss-rate%
1.70 -4.1% 1.63 -8.0% 1.56 -8.3% 1.56 perf-stat.overall.cpi
0.59 +4.3% 0.61 +8.7% 0.64 +9.0% 0.64 perf-stat.overall.ipc
193210 +3.9% 200708 +21.4% 234594 +21.5% 234812 perf-stat.overall.path-length
4.633e+09 +17.4% 5.441e+09 +76.1% 8.159e+09 +75.4% 8.129e+09 perf-stat.ps.branch-instructions
34084869 -74.0% 8860998 ? 2% -69.9% 10274305 -70.0% 10220106 perf-stat.ps.branch-misses
3.315e+10 +3.6% 3.433e+10 +9.1% 3.616e+10 +8.2% 3.587e+10 perf-stat.ps.instructions
0.18 ? 16% -11.5% 0.16 ? 22% -33.8% 0.12 ? 46% -58.6% 0.08 ? 49% perf-stat.ps.major-faults
1.001e+13 +3.6% 1.037e+13 +9.2% 1.093e+13 +8.2% 1.083e+13 perf-stat.total.instructions
18.55 -0.3 18.23 -1.1 17.45 -1.1 17.46 perf-profile.calltrace.cycles-pp.__x64_sys_futex.do_syscall_64.entry_SYSCALL_64_after_hwframe.syscall
1.82 -0.1 1.74 -0.2 1.60 -0.2 1.57 perf-profile.calltrace.cycles-pp.futex_q_unlock.futex_wait_setup.__futex_wait.futex_wait.do_futex
3.58 -0.1 3.51 -0.5 3.11 -0.5 3.11 perf-profile.calltrace.cycles-pp.futex_get_value_locked.futex_wait_setup.__futex_wait.futex_wait.do_futex
17.39 -0.1 17.32 -1.1 16.32 -1.1 16.30 perf-profile.calltrace.cycles-pp.do_futex.__x64_sys_futex.do_syscall_64.entry_SYSCALL_64_after_hwframe.syscall
0.68 ? 2% -0.0 0.66 -0.1 0.60 ? 2% -0.1 0.60 ? 2% perf-profile.calltrace.cycles-pp.entry_SYSCALL_64_safe_stack.syscall
2.73 -0.0 2.72 -0.3 2.40 -0.3 2.40 perf-profile.calltrace.cycles-pp.__get_user_nocheck_4.futex_get_value_locked.futex_wait_setup.__futex_wait.futex_wait
0.60 ? 2% +0.0 0.60 ? 2% -0.0 0.57 -0.0 0.59 ? 2% perf-profile.calltrace.cycles-pp.hrtimer_interrupt.__sysvec_apic_timer_interrupt.sysvec_apic_timer_interrupt.asm_sysvec_apic_timer_interrupt.cpuidle_enter_state
0.00 +0.0 0.00 +6.3 6.26 +6.2 6.22 perf-profile.calltrace.cycles-pp.clear_bhb_loop.syscall
0.61 ? 2% +0.0 0.61 ? 2% -0.0 0.58 -0.0 0.60 ? 2% perf-profile.calltrace.cycles-pp.__sysvec_apic_timer_interrupt.sysvec_apic_timer_interrupt.asm_sysvec_apic_timer_interrupt.cpuidle_enter_state.cpuidle_enter
72.70 +0.0 72.72 +0.1 72.78 +0.1 72.80 perf-profile.calltrace.cycles-pp.syscall
1.78 +0.0 1.80 -0.2 1.59 -0.2 1.58 perf-profile.calltrace.cycles-pp._raw_spin_lock.futex_q_lock.futex_wait_setup.__futex_wait.futex_wait
16.67 +0.0 16.71 -1.1 15.61 -1.1 15.59 perf-profile.calltrace.cycles-pp.futex_wait.do_futex.__x64_sys_futex.do_syscall_64.entry_SYSCALL_64_after_hwframe
20.50 +0.0 20.55 -0.5 20.04 -0.5 20.01 perf-profile.calltrace.cycles-pp.do_syscall_64.entry_SYSCALL_64_after_hwframe.syscall
21.76 +0.0 21.81 -0.5 21.22 -0.5 21.24 perf-profile.calltrace.cycles-pp.entry_SYSCALL_64_after_hwframe.syscall
2.07 +0.1 2.13 -0.2 1.90 -0.2 1.91 perf-profile.calltrace.cycles-pp.futex_hash.futex_q_lock.futex_wait_setup.__futex_wait.futex_wait
0.76 +0.1 0.84 ? 3% -0.0 0.74 -0.0 0.74 perf-profile.calltrace.cycles-pp.syscall_exit_to_user_mode.do_syscall_64.entry_SYSCALL_64_after_hwframe.syscall
5.09 +0.1 5.17 -0.5 4.60 -0.5 4.62 perf-profile.calltrace.cycles-pp.futex_q_lock.futex_wait_setup.__futex_wait.futex_wait.do_futex
7.85 +0.1 7.94 -0.7 7.10 -0.8 7.07 perf-profile.calltrace.cycles-pp.entry_SYSCALL_64.syscall
0.91 ? 2% +0.1 1.04 +0.0 0.92 +0.0 0.92 perf-profile.calltrace.cycles-pp.get_futex_key.futex_wait_setup.__futex_wait.futex_wait.do_futex
39.86 +0.2 40.02 -4.4 35.46 -4.4 35.48 perf-profile.calltrace.cycles-pp.entry_SYSRETQ_unsafe_stack.syscall
14.13 +0.2 14.35 -0.9 13.20 -1.0 13.18 perf-profile.calltrace.cycles-pp.__futex_wait.futex_wait.do_futex.__x64_sys_futex.do_syscall_64
12.44 +0.3 12.70 -1.1 11.33 -1.1 11.34 perf-profile.calltrace.cycles-pp.futex_wait_setup.__futex_wait.futex_wait.do_futex.__x64_sys_futex
18.62 -0.3 18.30 -1.1 17.57 -1.0 17.58 perf-profile.children.cycles-pp.__x64_sys_futex
17.59 -0.1 17.46 -1.0 16.54 -1.1 16.52 perf-profile.children.cycles-pp.do_futex
1.82 -0.1 1.74 -0.2 1.60 -0.2 1.57 perf-profile.children.cycles-pp.futex_q_unlock
3.19 -0.1 3.13 -0.4 2.77 -0.4 2.77 perf-profile.children.cycles-pp.__get_user_nocheck_4
0.68 ? 2% -0.0 0.66 -0.1 0.60 ? 2% -0.1 0.60 ? 2% perf-profile.children.cycles-pp.entry_SYSCALL_64_safe_stack
3.58 -0.0 3.57 -0.4 3.16 -0.4 3.16 perf-profile.children.cycles-pp.futex_get_value_locked
0.80 -0.0 0.79 ? 4% -0.0 0.76 ? 2% -0.1 0.75 ? 3% perf-profile.children.cycles-pp.hrtimer_interrupt
0.81 -0.0 0.80 ? 4% -0.0 0.77 ? 2% -0.0 0.76 ? 3% perf-profile.children.cycles-pp.__sysvec_apic_timer_interrupt
0.46 ? 2% -0.0 0.45 ? 5% -0.0 0.43 ? 2% -0.0 0.42 ? 4% perf-profile.children.cycles-pp.tick_nohz_handler
0.35 -0.0 0.34 -0.0 0.30 ? 3% -0.0 0.30 ? 2% perf-profile.children.cycles-pp.testcase
0.66 -0.0 0.65 ? 4% -0.0 0.62 -0.0 0.62 ? 2% perf-profile.children.cycles-pp.__hrtimer_run_queues
0.38 ? 2% -0.0 0.38 ? 5% -0.0 0.36 -0.0 0.35 ? 5% perf-profile.children.cycles-pp.update_process_times
0.14 ? 5% -0.0 0.14 ? 5% -0.0 0.12 ? 4% -0.0 0.12 ? 5% perf-profile.children.cycles-pp.amd_clear_divider
0.00 +0.0 0.00 +6.3 6.32 +6.3 6.29 perf-profile.children.cycles-pp.clear_bhb_loop
0.28 ? 6% +0.0 0.28 ? 4% -0.0 0.25 ? 3% -0.0 0.24 ? 2% perf-profile.children.cycles-pp.syscall_exit_to_user_mode_prepare
0.90 +0.0 0.91 ? 3% -0.1 0.80 -0.1 0.81 perf-profile.children.cycles-pp.syscall_exit_to_user_mode
1.88 +0.0 1.90 ? 2% -0.2 1.69 -0.2 1.68 perf-profile.children.cycles-pp._raw_spin_lock
0.17 ? 4% +0.0 0.20 ? 2% -0.1 0.12 ? 3% -0.1 0.12 ? 7% perf-profile.children.cycles-pp.futex_setup_timer
20.64 +0.0 20.69 -0.5 20.18 -0.4 20.21 perf-profile.children.cycles-pp.do_syscall_64
21.90 +0.0 21.94 -0.5 21.41 -0.5 21.43 perf-profile.children.cycles-pp.entry_SYSCALL_64_after_hwframe
2.07 +0.1 2.13 -0.2 1.90 -0.2 1.91 perf-profile.children.cycles-pp.futex_hash
5.13 +0.1 5.20 -0.5 4.64 -0.5 4.64 perf-profile.children.cycles-pp.entry_SYSCALL_64
16.84 +0.1 16.91 -1.1 15.73 -1.1 15.71 perf-profile.children.cycles-pp.futex_wait
5.30 +0.1 5.37 -0.5 4.79 -0.5 4.80 perf-profile.children.cycles-pp.futex_q_lock
0.91 ? 2% +0.1 1.05 +0.0 0.92 +0.0 0.92 perf-profile.children.cycles-pp.get_futex_key
42.79 +0.2 42.98 -4.6 38.15 -4.6 38.18 perf-profile.children.cycles-pp.entry_SYSRETQ_unsafe_stack
14.13 +0.2 14.36 -0.9 13.20 -1.0 13.18 perf-profile.children.cycles-pp.__futex_wait
12.58 +0.3 12.83 -1.1 11.44 -1.1 11.44 perf-profile.children.cycles-pp.futex_wait_setup
0.00 +0.4 0.41 ? 2% +0.6 0.56 ? 2% +0.6 0.58 ? 3% perf-profile.children.cycles-pp.x64_sys_call
4.04 -0.3 3.77 -0.7 3.36 -0.7 3.33 perf-profile.self.cycles-pp.syscall
1.03 ? 2% -0.3 0.76 ? 2% -0.0 1.00 -0.0 1.02 perf-profile.self.cycles-pp.__x64_sys_futex
0.88 -0.3 0.62 +0.0 0.91 +0.0 0.91 perf-profile.self.cycles-pp.do_futex
2.50 -0.1 2.42 -0.2 2.30 -0.2 2.31 perf-profile.self.cycles-pp.futex_wait
1.74 -0.1 1.68 -0.2 1.55 -0.2 1.52 perf-profile.self.cycles-pp.futex_q_unlock
3.18 -0.1 3.12 -0.4 2.76 -0.4 2.76 perf-profile.self.cycles-pp.__get_user_nocheck_4
0.54 -0.1 0.48 ? 3% -0.1 0.43 -0.1 0.44 ? 3% perf-profile.self.cycles-pp.syscall_exit_to_user_mode
1.48 -0.0 1.45 ? 2% +0.2 1.69 ? 2% +0.2 1.67 perf-profile.self.cycles-pp.__futex_wait
0.68 ? 2% -0.0 0.66 -0.1 0.60 ? 2% -0.1 0.60 ? 2% perf-profile.self.cycles-pp.entry_SYSCALL_64_safe_stack
0.35 -0.0 0.34 -0.0 0.30 ? 3% -0.0 0.30 ? 2% perf-profile.self.cycles-pp.testcase
0.00 +0.0 0.00 +6.3 6.26 +6.2 6.22 perf-profile.self.cycles-pp.clear_bhb_loop
1.33 +0.0 1.33 -0.1 1.23 -0.1 1.22 perf-profile.self.cycles-pp.entry_SYSCALL_64_after_hwframe
1.44 +0.0 1.44 -0.1 1.30 -0.1 1.30 perf-profile.self.cycles-pp.futex_q_lock
1.03 +0.0 1.05 ? 2% +0.2 1.22 +0.3 1.28 perf-profile.self.cycles-pp.do_syscall_64
1.80 +0.0 1.84 ? 2% -0.2 1.62 -0.2 1.62 perf-profile.self.cycles-pp._raw_spin_lock
2.42 +0.0 2.46 -0.2 2.19 -0.2 2.20 perf-profile.self.cycles-pp.entry_SYSCALL_64
0.38 ? 6% +0.1 0.44 +0.0 0.38 -0.0 0.38 ? 3% perf-profile.self.cycles-pp.futex_get_value_locked
2.00 +0.1 2.06 -0.2 1.83 -0.2 1.84 perf-profile.self.cycles-pp.futex_hash
0.21 ? 6% +0.1 0.28 ? 4% +0.0 0.25 ? 3% +0.0 0.24 ? 2% perf-profile.self.cycles-pp.syscall_exit_to_user_mode_prepare
1.11 ? 3% +0.1 1.22 ? 3% -0.0 1.08 ? 2% -0.0 1.10 perf-profile.self.cycles-pp.futex_wait_setup
0.90 ? 2% +0.1 1.04 +0.0 0.92 +0.0 0.92 ? 2% perf-profile.self.cycles-pp.get_futex_key
42.61 +0.2 42.81 -4.6 38.00 -4.6 38.02 perf-profile.self.cycles-pp.entry_SYSRETQ_unsafe_stack
0.00 +0.4 0.41 ? 2% +0.6 0.55 ? 2% +0.5 0.52 ? 3% perf-profile.self.cycles-pp.x64_sys_call

Intel Xeon Gold 6346 (Ice Lake)
=========================================================================================
tbox_group/testcase/rootfs/kconfig/compiler/nr_task/mode/test/cpufreq_governor:
lkp-icl-2sp9/will-it-scale/debian-12-x86_64-20240206.cgz/x86_64-rhel-8.3/gcc-13/16/process/futex4/performance

commit: 0cd01ac5dcb1 ("x86/bugs: Change commas to semicolons in 'spectre_v2' sysfs file") 1e3ad78334a6 ("x86/syscall: Don't force use of indirect calls for system calls") v6.9-rc4 v6.9-rc4+v3_patch

0cd01ac5dcb1 1e3ad78334a6 v6.9-rc4 v6.9-rc4+v3_patch
---------------- --------------------------- --------------------------- ---------------------------
%stddev %change %stddev %change %stddev %change %stddev
\ | \ | \ | \
7907214 -1.8% 7763496 -15.4% 6686457 -15.5% 6678350 will-it-scale.per_process_ops
1.265e+08 -1.8% 1.242e+08 -15.4% 1.07e+08 -15.5% 1.069e+08 will-it-scale.workload
1.112e+10 +16.0% 1.29e+10 +67.3% 1.86e+10 +68.0% 1.868e+10 perf-stat.i.branch-instructions
0.06 ? 2% -0.0 0.06 ? 2% -0.0 0.05 -0.0 0.05 perf-stat.i.branch-miss-rate%
6858604 ? 2% +0.6% 6900573 ? 2% +8.4% 7434422 +7.7% 7388238 perf-stat.i.branch-misses
0.72 -2.0% 0.71 -2.7% 0.70 -2.7% 0.70 perf-stat.i.cpi
8.004e+10 +2.1% 8.17e+10 +2.8% 8.231e+10 +2.8% 8.232e+10 perf-stat.i.instructions
1.38 +2.1% 1.41 +2.8% 1.42 +2.8% 1.42 perf-stat.i.ipc
0.06 ? 2% -0.0 0.05 ? 2% -0.0 0.04 -0.0 0.04 perf-stat.overall.branch-miss-rate%
0.72 -2.0% 0.71 -2.8% 0.70 -2.8% 0.70 perf-stat.overall.cpi
1.38 +2.1% 1.41 +2.8% 1.42 +2.8% 1.42 perf-stat.overall.ipc
190470 +3.9% 197929 +21.7% 231786 +21.8% 231973 perf-stat.overall.path-length
1.108e+10 +16.0% 1.286e+10 +67.3% 1.854e+10 +68.0% 1.862e+10 perf-stat.ps.branch-instructions
6893534 ? 2% +0.5% 6924998 ? 2% +8.3% 7462919 +7.5% 7410265 perf-stat.ps.branch-misses
7.978e+10 +2.1% 8.143e+10 +2.8% 8.204e+10 +2.8% 8.205e+10 perf-stat.ps.instructions
2.41e+13 +2.0% 2.459e+13 +2.9% 2.48e+13 +2.9% 2.479e+13 perf-stat.total.instructions
48.06 -2.8 45.31 -9.9 38.20 ? 3% -9.1 38.94 perf-profile.calltrace.cycles-pp.__futex_wait.futex_wait.do_futex.__x64_sys_futex.do_syscall_64
42.93 -2.5 40.41 -8.8 34.12 ? 4% -8.1 34.84 perf-profile.calltrace.cycles-pp.futex_wait_setup.__futex_wait.futex_wait.do_futex.__x64_sys_futex
56.45 -2.4 54.10 -12.0 44.44 -11.4 45.05 perf-profile.calltrace.cycles-pp.futex_wait.do_futex.__x64_sys_futex.do_syscall_64.entry_SYSCALL_64_after_hwframe
58.78 -2.3 56.48 -12.5 46.31 -11.9 46.86 perf-profile.calltrace.cycles-pp.do_futex.__x64_sys_futex.do_syscall_64.entry_SYSCALL_64_after_hwframe.syscall
61.14 -2.3 58.86 -12.9 48.20 -12.5 48.67 perf-profile.calltrace.cycles-pp.__x64_sys_futex.do_syscall_64.entry_SYSCALL_64_after_hwframe.syscall
71.08 -1.4 69.71 -12.1 58.96 -12.1 58.95 perf-profile.calltrace.cycles-pp.entry_SYSCALL_64_after_hwframe.syscall
68.07 -1.2 66.88 -11.8 56.28 -11.8 56.26 perf-profile.calltrace.cycles-pp.do_syscall_64.entry_SYSCALL_64_after_hwframe.syscall
17.13 -1.1 16.06 -3.8 13.38 ? 7% -2.9 14.20 ? 5% perf-profile.calltrace.cycles-pp.futex_q_lock.futex_wait_setup.__futex_wait.futex_wait.do_futex
100.03 -0.8 99.22 -1.0 99.01 -1.4 98.60 perf-profile.calltrace.cycles-pp.syscall
15.22 -0.8 14.42 -2.7 12.53 ? 5% -2.7 12.52 perf-profile.calltrace.cycles-pp.futex_get_value_locked.futex_wait_setup.__futex_wait.futex_wait.do_futex
12.02 -0.6 11.37 -2.1 9.89 ? 6% -2.1 9.92 perf-profile.calltrace.cycles-pp.__get_user_nocheck_4.futex_get_value_locked.futex_wait_setup.__futex_wait.futex_wait
3.12 ? 9% -0.5 2.61 -0.9 2.22 ? 10% -1.0 2.08 ? 7% perf-profile.calltrace.cycles-pp.syscall_exit_to_user_mode.do_syscall_64.entry_SYSCALL_64_after_hwframe.syscall
7.38 ? 2% -0.4 6.99 -1.9 5.44 ? 5% -1.6 5.76 ? 5% perf-profile.calltrace.cycles-pp.futex_hash.futex_q_lock.futex_wait_setup.__futex_wait.futex_wait
5.12 -0.3 4.78 -0.9 4.20 ? 10% -0.6 4.47 ? 5% perf-profile.calltrace.cycles-pp._raw_spin_lock.futex_q_lock.futex_wait_setup.__futex_wait.futex_wait
4.99 ? 2% -0.3 4.66 -1.0 4.00 ? 5% -1.2 3.79 ? 6% perf-profile.calltrace.cycles-pp.futex_q_unlock.futex_wait_setup.__futex_wait.futex_wait.do_futex
3.02 ? 3% -0.2 2.80 -0.9 2.17 -0.8 2.25 ? 3% perf-profile.calltrace.cycles-pp.get_futex_key.futex_wait_setup.__futex_wait.futex_wait.do_futex
1.58 ? 3% -0.1 1.51 -0.3 1.29 ? 10% -0.4 1.22 ? 7% perf-profile.calltrace.cycles-pp.syscall_return_via_sysret.syscall
0.94 ? 3% -0.1 0.87 -0.2 0.75 ? 9% -0.2 0.70 ? 8% perf-profile.calltrace.cycles-pp.syscall_exit_to_user_mode_prepare.syscall_exit_to_user_mode.do_syscall_64.entry_SYSCALL_64_after_hwframe.syscall
0.69 ? 3% -0.0 0.65 -0.2 0.47 ? 46% -0.3 0.36 ? 71% perf-profile.calltrace.cycles-pp.amd_clear_divider.syscall_exit_to_user_mode.do_syscall_64.entry_SYSCALL_64_after_hwframe.syscall
0.68 ? 3% -0.0 0.66 -0.3 0.38 ? 71% -0.2 0.45 ? 45% perf-profile.calltrace.cycles-pp.entry_SYSRETQ_unsafe_stack.syscall
0.00 +0.0 0.00 +15.2 15.21 ? 2% +14.8 14.83 perf-profile.calltrace.cycles-pp.clear_bhb_loop.syscall
1.04 ? 2% +0.1 1.13 ? 2% -0.1 0.96 ? 3% -0.0 1.00 ? 5% perf-profile.calltrace.cycles-pp.testcase
1.57 +0.1 1.70 -0.1 1.48 ? 9% -0.0 1.54 ? 5% perf-profile.calltrace.cycles-pp.entry_SYSCALL_64_safe_stack.syscall
0.00 +1.3 1.29 +1.6 1.62 ? 8% +1.3 1.34 ? 4% perf-profile.calltrace.cycles-pp.x64_sys_call.do_syscall_64.entry_SYSCALL_64_after_hwframe.syscall
16.18 +1.6 17.80 -0.6 15.63 ? 7% +0.0 16.22 ? 6% perf-profile.calltrace.cycles-pp.entry_SYSCALL_64.syscall
48.52 -2.8 45.75 -10.0 38.57 ? 2% -9.2 39.30 perf-profile.children.cycles-pp.__futex_wait
44.20 -2.6 41.60 -9.1 35.12 ? 3% -8.4 35.84 perf-profile.children.cycles-pp.futex_wait_setup
57.11 -2.4 54.75 -12.1 44.98 -11.5 45.58 perf-profile.children.cycles-pp.futex_wait
59.22 -2.3 56.91 -12.7 46.54 -12.1 47.10 perf-profile.children.cycles-pp.do_futex
61.79 -2.3 59.51 -13.0 48.74 -12.6 49.19 perf-profile.children.cycles-pp.__x64_sys_futex
69.05 -1.5 67.59 -12.1 56.90 -12.2 56.85 perf-profile.children.cycles-pp.do_syscall_64
71.36 -1.4 70.00 -11.9 59.44 -11.9 59.43 perf-profile.children.cycles-pp.entry_SYSCALL_64_after_hwframe
17.82 -1.1 16.70 -3.9 13.94 ? 7% -3.0 14.79 ? 5% perf-profile.children.cycles-pp.futex_q_lock
14.54 -0.8 13.76 -2.6 11.96 ? 5% -2.6 11.98 perf-profile.children.cycles-pp.futex_get_value_locked
13.16 -0.7 12.46 -2.3 10.83 ? 5% -2.3 10.84 perf-profile.children.cycles-pp.__get_user_nocheck_4
3.96 ? 3% -0.5 3.46 -1.0 2.95 ? 10% -1.2 2.78 ? 7% perf-profile.children.cycles-pp.syscall_exit_to_user_mode
7.61 ? 2% -0.4 7.21 -2.0 5.62 ? 4% -1.6 5.96 ? 5% perf-profile.children.cycles-pp.futex_hash
5.35 -0.4 5.00 -1.0 4.40 ? 10% -0.7 4.67 ? 5% perf-profile.children.cycles-pp._raw_spin_lock
5.22 ? 2% -0.3 4.88 -1.0 4.19 ? 5% -1.3 3.97 ? 6% perf-profile.children.cycles-pp.futex_q_unlock
3.26 ? 3% -0.2 3.02 -0.9 2.35 ? 2% -0.8 2.44 ? 3% perf-profile.children.cycles-pp.get_futex_key
98.50 -0.1 98.40 +0.1 98.60 +0.1 98.55 perf-profile.children.cycles-pp.syscall
1.81 ? 3% -0.1 1.73 -0.3 1.47 ? 10% -0.4 1.40 ? 7% perf-profile.children.cycles-pp.syscall_return_via_sysret
1.17 ? 3% -0.1 1.09 -0.2 0.94 ? 9% -0.3 0.87 ? 8% perf-profile.children.cycles-pp.syscall_exit_to_user_mode_prepare
0.93 ? 3% -0.1 0.86 ? 2% -0.2 0.73 ? 10% -0.2 0.70 ? 8% perf-profile.children.cycles-pp.amd_clear_divider
0.16 ? 2% -0.0 0.15 -0.0 0.15 ? 5% -0.0 0.15 ? 4% perf-profile.children.cycles-pp.__sysvec_apic_timer_interrupt
0.16 ? 3% -0.0 0.14 ? 3% -0.0 0.14 ? 3% -0.0 0.14 ? 5% perf-profile.children.cycles-pp.hrtimer_interrupt
9.15 ? 2% -0.0 9.14 -1.5 7.65 ? 7% -1.6 7.54 ? 3% perf-profile.children.cycles-pp.entry_SYSRETQ_unsafe_stack
0.65 ? 4% -0.0 0.64 -0.1 0.54 ? 7% -0.1 0.54 ? 2% perf-profile.children.cycles-pp.futex_setup_timer
0.00 +0.0 0.00 +15.4 15.40 ? 2% +15.0 15.01 perf-profile.children.cycles-pp.clear_bhb_loop
0.62 ? 2% +0.0 0.66 ? 2% -0.1 0.56 ? 5% -0.0 0.58 ? 5% perf-profile.children.cycles-pp.syscall@plt
1.45 +0.1 1.57 -0.1 1.33 ? 2% -0.1 1.39 ? 5% perf-profile.children.cycles-pp.testcase
1.59 +0.1 1.72 -0.1 1.49 ? 9% -0.0 1.56 ? 5% perf-profile.children.cycles-pp.entry_SYSCALL_64_safe_stack
9.45 +0.9 10.37 -0.3 9.12 ? 7% +0.0 9.45 ? 5% perf-profile.children.cycles-pp.entry_SYSCALL_64
0.00 +1.5 1.51 +1.8 1.81 ? 8% +1.5 1.51 ? 4% perf-profile.children.cycles-pp.x64_sys_call
12.90 -0.7 12.23 -2.3 10.63 ? 5% -2.3 10.64 perf-profile.self.cycles-pp.__get_user_nocheck_4
7.38 ? 2% -0.4 6.99 -1.9 5.43 ? 5% -1.6 5.76 ? 5% perf-profile.self.cycles-pp.futex_hash
5.09 -0.4 4.70 -1.0 4.11 ? 8% -0.7 4.35 ? 6% perf-profile.self.cycles-pp.futex_q_lock
5.11 -0.3 4.78 -0.9 4.21 ? 10% -0.6 4.47 ? 5% perf-profile.self.cycles-pp._raw_spin_lock
4.86 ? 2% -0.3 4.54 -0.9 3.92 ? 5% -1.1 3.71 ? 7% perf-profile.self.cycles-pp.futex_q_unlock
3.68 -0.2 3.45 -0.1 3.62 ? 9% -0.1 3.56 ? 7% perf-profile.self.cycles-pp.do_syscall_64
3.02 ? 3% -0.2 2.80 -0.9 2.16 ? 2% -0.8 2.25 ? 3% perf-profile.self.cycles-pp.get_futex_key
4.33 ? 3% -0.2 4.14 -0.9 3.45 ? 6% -0.9 3.45 ? 2% perf-profile.self.cycles-pp.__futex_wait
4.17 -0.2 3.99 ? 3% -0.9 3.32 -0.9 3.32 perf-profile.self.cycles-pp.futex_wait_setup
2.09 ? 3% -0.2 1.93 -0.4 1.64 ? 9% -0.5 1.56 ? 7% perf-profile.self.cycles-pp.syscall_exit_to_user_mode
1.39 ? 2% -0.1 1.29 -0.3 1.13 ? 2% -0.3 1.12 ? 2% perf-profile.self.cycles-pp.futex_get_value_locked
1.81 ? 3% -0.1 1.73 -0.3 1.47 ? 10% -0.4 1.40 ? 7% perf-profile.self.cycles-pp.syscall_return_via_sysret
0.94 ? 3% -0.1 0.88 -0.2 0.75 ? 10% -0.2 0.70 ? 8% perf-profile.self.cycles-pp.syscall_exit_to_user_mode_prepare
0.46 ? 2% -0.0 0.43 ? 2% -0.1 0.37 ? 11% -0.1 0.34 ? 6% perf-profile.self.cycles-pp.amd_clear_divider
0.43 ? 4% +0.0 0.43 ? 2% -0.1 0.36 ? 7% -0.1 0.36 ? 2% perf-profile.self.cycles-pp.futex_setup_timer
0.00 +0.0 0.00 +15.2 15.22 ? 2% +14.8 14.81 perf-profile.self.cycles-pp.clear_bhb_loop
8.92 ? 2% +0.0 8.92 -1.4 7.47 ? 7% -1.6 7.36 ? 2% perf-profile.self.cycles-pp.entry_SYSRETQ_unsafe_stack
0.20 +0.0 0.22 ? 3% -0.0 0.18 ? 8% -0.0 0.20 ? 7% perf-profile.self.cycles-pp.syscall@plt
2.76 +0.0 2.81 -0.4 2.38 ? 10% -0.5 2.27 ? 7% perf-profile.self.cycles-pp.__x64_sys_futex
1.90 ? 3% +0.0 1.95 -0.7 1.23 ? 11% -0.7 1.22 ? 8% perf-profile.self.cycles-pp.do_futex
2.50 ? 2% +0.1 2.61 +0.1 2.56 ? 8% +0.1 2.60 ? 4% perf-profile.self.cycles-pp.entry_SYSCALL_64_after_hwframe
1.24 +0.1 1.35 ? 2% -0.1 1.14 ? 3% -0.0 1.19 ? 5% perf-profile.self.cycles-pp.testcase
1.59 +0.1 1.72 -0.1 1.49 ? 9% -0.0 1.56 ? 5% perf-profile.self.cycles-pp.entry_SYSCALL_64_safe_stack
2.72 +0.2 2.94 ? 2% -0.1 2.61 ? 9% -0.0 2.69 ? 6% perf-profile.self.cycles-pp.entry_SYSCALL_64
8.15 ? 3% +0.4 8.56 -2.0 6.18 ? 10% -2.1 6.04 ? 3% perf-profile.self.cycles-pp.futex_wait
11.95 +1.0 12.92 -1.0 10.97 ? 4% -0.6 11.35 ? 4% perf-profile.self.cycles-pp.syscall
0.00 +1.3 1.30 +1.6 1.62 ? 8% +1.3 1.33 ? 4% perf-profile.self.cycles-pp.x64_sys_call

BTW, we did observe some regressions by running other benchmarks on
commit 1e3ad78334a6, but these regressions are on Ice Lake, not Skylake.
Please kindly contact us if you are interested in looking into them.

stress-ng.null.ops_per_sec -4.0% regression on Intel Xeon Gold 6346 (Ice Lake)
unixbench.fsbuffer.throughput -1.4% regression on Intel Xeon Gold 6346 (Ice Lake)

Thanks,
Yujie

>
> [*] https://lkml.kernel.org/lkml/eda0ec65f4612cc66875aaf76e738643f41fbc01.1713296762.git.jpoimboe@kernel.org
>
> --
> Josh
>