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Date:   Fri, 24 Nov 2023 08:40:52 +0800
From:   kernel test robot <oliver.sang@intel.com>
To:     Kumar Kartikeya Dwivedi <memxor@gmail.com>
CC:     <oe-lkp@lists.linux.dev>, <lkp@intel.com>,
        <linux-kernel@vger.kernel.org>,
        Alexei Starovoitov <ast@kernel.org>, <bpf@vger.kernel.org>,
        <ying.huang@intel.com>, <feng.tang@intel.com>,
        <fengwei.yin@intel.com>, <oliver.sang@intel.com>
Subject: [linus:master] [bpf]  f18b03faba:  stress-ng.seccomp.ops_per_sec
 -2.0% regression
Message-ID: <202311231458.61e2502f-oliver.sang@intel.com>
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Hello,

kernel test robot noticed a -2.0% regression of stress-ng.seccomp.ops_per_sec on:


commit: f18b03fabaa9b7c80e80b72a621f481f0d706ae0 ("bpf: Implement BPF exceptions")
https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git master

testcase: stress-ng
test machine: 36 threads 1 sockets Intel(R) Core(TM) i9-10980XE CPU @ 3.00GHz (Cascade Lake) with 128G memory
parameters:

	nr_threads: 1
	disk: 1HDD
	testtime: 60s
	fs: ext4
	class: os
	test: seccomp
	cpufreq_governor: performance


If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <oliver.sang@intel.com>
| Closes: https://lore.kernel.org/oe-lkp/202311231458.61e2502f-oliver.sang@intel.com


Details are as below:
-------------------------------------------------------------------------------------------------->


The kernel config and materials to reproduce are available at:
https://download.01.org/0day-ci/archive/20231123/202311231458.61e2502f-oliver.sang@intel.com

=========================================================================================
class/compiler/cpufreq_governor/disk/fs/kconfig/nr_threads/rootfs/tbox_group/test/testcase/testtime:
  os/gcc-12/performance/1HDD/ext4/x86_64-rhel-8.3/1/debian-11.1-x86_64-20220510.cgz/lkp-csl-d02/seccomp/stress-ng/60s

commit: 
  335d1c5b54 ("bpf: Implement support for adding hidden subprogs")
  f18b03faba ("bpf: Implement BPF exceptions")

335d1c5b545284d7 f18b03fabaa9b7c80e80b72a621 
---------------- --------------------------- 
         %stddev     %change         %stddev
             \          |                \  
     13890 ?  7%      -9.4%      12579 ?  3%  turbostat.POLL
      0.01 ? 13%     +48.4%       0.01 ? 16%  perf-sched.sch_delay.avg.ms.syslog_print.do_syslog.kmsg_read.vfs_read
      0.01 ? 11%     +70.3%       0.01 ? 16%  perf-sched.sch_delay.max.ms.syslog_print.do_syslog.kmsg_read.vfs_read
      0.78 ? 23%      -0.2        0.55 ? 11%  mpstat.cpu.all.irq%
      0.05 ? 17%      -0.0        0.03 ? 12%  mpstat.cpu.all.soft%
      2.39 ?  8%      +0.3        2.65 ?  2%  mpstat.cpu.all.sys%
     27256            -2.0%      26712        stress-ng.seccomp.ops
    454.26            -2.0%     445.19        stress-ng.seccomp.ops_per_sec
     54565            -1.9%      53516        stress-ng.time.voluntary_context_switches
      7.07 ?  4%      -1.7        5.36 ? 11%  perf-profile.calltrace.cycles-pp.emit_mov_imm32.do_jit.bpf_int_jit_compile.bpf_prog_select_runtime.bpf_prepare_filter
      6.01 ?  5%      -1.4        4.64 ? 10%  perf-profile.children.cycles-pp.emit_mov_imm32
      0.21 ? 15%      -0.0        0.16 ? 15%  perf-profile.children.cycles-pp.mod_objcg_state
      4.91 ?  5%      -1.0        3.90 ? 10%  perf-profile.self.cycles-pp.emit_mov_imm32
   3921440            -2.3%    3831836        proc-vmstat.numa_hit
   3921405            -2.3%    3829327        proc-vmstat.numa_local
  19214848            -2.1%   18810333        proc-vmstat.pgalloc_normal
  19165012            -2.1%   18760451        proc-vmstat.pgfree
    116766 ?  8%      -6.0%     109716        proc-vmstat.pgreuse
     25902            -2.0%      25381        proc-vmstat.thp_fault_alloc
      1.73 ? 59%      -1.3        0.48 ? 41%  perf-stat.i.branch-miss-rate%
  23564234 ?  2%      -5.6%   22236469        perf-stat.i.cache-references
    331079 ? 18%     -27.3%     240834 ?  9%  perf-stat.i.dTLB-load-misses
      0.07 ? 45%      -0.0        0.03 ? 26%  perf-stat.i.dTLB-store-miss-rate%
     53.82 ?  4%      -4.7       49.17        perf-stat.i.iTLB-load-miss-rate%
    679766 ?  6%     +11.1%     755158        perf-stat.i.iTLB-loads
      9620 ?  7%     +13.6%      10932 ?  2%  perf-stat.i.instructions-per-iTLB-miss
      2454 ?  2%      +4.3%       2560        perf-stat.overall.cycles-between-cache-misses
      0.03 ?  6%      -0.0        0.03 ?  2%  perf-stat.overall.dTLB-store-miss-rate%
     52.10            -2.3       49.76        perf-stat.overall.iTLB-load-miss-rate%
      9654 ?  3%      +6.5%      10286        perf-stat.overall.instructions-per-iTLB-miss
  23233597 ?  2%      -5.8%   21887967        perf-stat.ps.cache-references
    326645 ? 18%     -27.4%     237090 ?  9%  perf-stat.ps.dTLB-load-misses
    669939 ?  6%     +10.9%     743269        perf-stat.ps.iTLB-loads
 4.987e+11            -3.2%  4.829e+11        perf-stat.total.instructions


Disclaimer:
Results have been estimated based on internal Intel analysis and are provided
for informational purposes only. Any difference in system hardware or software
design or configuration may affect actual performance.


-- 
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki