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Date: Mon, 11 Mar 2024 21:12:57 +0800
From: kernel test robot <oliver.sang@intel.com>
To: Filipe Manana <fdmanana@suse.com>
CC: <oe-lkp@lists.linux.dev>, <lkp@intel.com>, <linux-kernel@vger.kernel.org>,
	David Sterba <dsterba@suse.com>, <linux-btrfs@vger.kernel.org>,
	<ying.huang@intel.com>, <feng.tang@intel.com>, <fengwei.yin@intel.com>,
	<oliver.sang@intel.com>
Subject: [linus:master] [btrfs]  e06cc89475:  aim7.jobs-per-min -12.9%
 regression
Message-ID: <202403112002.cc4b1158-oliver.sang@intel.com>
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Hello,

kernel test robot noticed a -12.9% regression of aim7.jobs-per-min on:


commit: e06cc89475eddc1f3a7a4d471524256152c68166 ("btrfs: fix data races when accessing the reserved amount of block reserves")
https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git master

[test failed on linus/master 09e5c48fea173b72f1c763776136eeb379b1bc47]


testcase: aim7
test machine: 128 threads 2 sockets Intel(R) Xeon(R) Gold 6338 CPU @ 2.00GHz (Ice Lake) with 256G memory
parameters:

	disk: 1BRD_48G
	fs: btrfs
	test: disk_cp
	load: 1500
	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/202403112002.cc4b1158-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/20240311/202403112002.cc4b1158-oliver.sang@intel.com

=========================================================================================
compiler/cpufreq_governor/disk/fs/kconfig/load/rootfs/tbox_group/test/testcase:
  gcc-12/performance/1BRD_48G/btrfs/x86_64-rhel-8.3/1500/debian-12-x86_64-20240206.cgz/lkp-icl-2sp2/disk_cp/aim7

commit: 
  5897710b28 ("btrfs: send: don't issue unnecessary zero writes for trailing hole")
  e06cc89475 ("btrfs: fix data races when accessing the reserved amount of block reserves")

5897710b28cabab0 e06cc89475eddc1f3a7a4d47152 
---------------- --------------------------- 
         %stddev     %change         %stddev
             \          |                \  
     13.71            -6.3%      12.84        iostat.cpu.idle
     86109 ?  5%     -10.3%      77204 ?  2%  meminfo.Mapped
      0.29 ?  2%      -0.0        0.25 ?  2%  mpstat.cpu.all.usr%
    249.60           +12.6%     280.99 ?  2%  uptime.boot
    148704 ?  3%     +11.9%     166363 ?  3%  numa-vmstat.node0.nr_written
    148026 ?  4%     +10.5%     163536 ?  3%  numa-vmstat.node1.nr_written
     83929            -8.8%      76554        vmstat.system.cs
    202906            -4.6%     193642        vmstat.system.in
     21940 ?  5%     -10.2%      19706 ?  2%  proc-vmstat.nr_mapped
    296731 ?  4%     +11.2%     329900 ?  3%  proc-vmstat.nr_written
    971976            +6.8%    1037759        proc-vmstat.pgfault
   1190113 ?  4%     +11.2%    1323358 ?  3%  proc-vmstat.pgpgout
     61472 ?  3%      +9.8%      67507 ?  3%  proc-vmstat.pgreuse
     45149           -12.9%      39308 ?  2%  aim7.jobs-per-min
    199.49           +14.9%     229.19 ?  2%  aim7.time.elapsed_time
    199.49           +14.9%     229.19 ?  2%  aim7.time.elapsed_time.max
    106461 ?  3%     +20.1%     127873 ?  2%  aim7.time.involuntary_context_switches
    153317            +4.7%     160598        aim7.time.minor_page_faults
     22001           +16.1%      25542 ?  2%  aim7.time.system_time
   8341344            +4.7%    8730263        aim7.time.voluntary_context_switches
      1.52           +10.0%       1.67        perf-stat.i.MPKI
 7.428e+09            -2.7%  7.229e+09        perf-stat.i.branch-instructions
      0.62 ?  2%      -0.1        0.56        perf-stat.i.branch-miss-rate%
  27712058           -10.6%   24784125 ?  2%  perf-stat.i.branch-misses
     24.15            +1.3       25.40        perf-stat.i.cache-miss-rate%
  51305985            +5.9%   54318013        perf-stat.i.cache-misses
     84790            -8.9%      77275        perf-stat.i.context-switches
      8.56            +5.1%       9.00        perf-stat.i.cpi
      3464            -3.4%       3346        perf-stat.i.cpu-migrations
      5494            -4.1%       5271        perf-stat.i.cycles-between-cache-misses
 3.253e+10            -3.4%  3.141e+10        perf-stat.i.instructions
      0.18            -7.5%       0.17        perf-stat.i.ipc
      4301 ?  3%      -6.5%       4022 ?  2%  perf-stat.i.minor-faults
      4303 ?  3%      -6.5%       4024 ?  2%  perf-stat.i.page-faults
      1.58            +9.6%       1.73        perf-stat.overall.MPKI
      0.37            -0.0        0.34        perf-stat.overall.branch-miss-rate%
     24.56            +1.3       25.83        perf-stat.overall.cache-miss-rate%
      8.90            +4.6%       9.31        perf-stat.overall.cpi
      5642            -4.5%       5386        perf-stat.overall.cycles-between-cache-misses
      0.11            -4.4%       0.11        perf-stat.overall.ipc
 7.412e+09            -2.6%  7.216e+09        perf-stat.ps.branch-instructions
  27605707 ?  2%     -10.4%   24743238        perf-stat.ps.branch-misses
  51201807            +5.9%   54221492        perf-stat.ps.cache-misses
     84459            -8.8%      77008        perf-stat.ps.context-switches
 2.889e+11            +1.1%   2.92e+11        perf-stat.ps.cpu-cycles
      3468            -3.4%       3349        perf-stat.ps.cpu-migrations
 3.246e+10            -3.4%  3.135e+10        perf-stat.ps.instructions
      4534            -6.7%       4228        perf-stat.ps.minor-faults
      4537            -6.8%       4230        perf-stat.ps.page-faults
 6.503e+12           +11.0%  7.221e+12        perf-stat.total.instructions
     33.78            -0.2       33.57        perf-profile.calltrace.cycles-pp._raw_spin_lock.btrfs_block_rsv_release.btrfs_inode_rsv_release.btrfs_buffered_write.btrfs_do_write_iter
     33.84            -0.2       33.66        perf-profile.calltrace.cycles-pp.btrfs_block_rsv_release.btrfs_inode_rsv_release.btrfs_buffered_write.btrfs_do_write_iter.vfs_write
     33.84            -0.2       33.66        perf-profile.calltrace.cycles-pp.btrfs_inode_rsv_release.btrfs_buffered_write.btrfs_do_write_iter.vfs_write.ksys_write
     33.66            -0.2       33.49        perf-profile.calltrace.cycles-pp.native_queued_spin_lock_slowpath._raw_spin_lock.btrfs_block_rsv_release.btrfs_inode_rsv_release.btrfs_buffered_write
      1.00 ?  4%      -0.1        0.88 ?  2%  perf-profile.calltrace.cycles-pp.btrfs_set_extent_delalloc.btrfs_dirty_pages.btrfs_buffered_write.btrfs_do_write_iter.vfs_write
      0.94 ?  4%      -0.1        0.83 ?  2%  perf-profile.calltrace.cycles-pp.btrfs_get_extent.btrfs_set_extent_delalloc.btrfs_dirty_pages.btrfs_buffered_write.btrfs_do_write_iter
      0.77 ?  4%      -0.1        0.68 ?  2%  perf-profile.calltrace.cycles-pp.btrfs_search_slot.btrfs_lookup_file_extent.btrfs_get_extent.btrfs_set_extent_delalloc.btrfs_dirty_pages
      0.77 ?  4%      -0.1        0.68 ?  2%  perf-profile.calltrace.cycles-pp.btrfs_lookup_file_extent.btrfs_get_extent.btrfs_set_extent_delalloc.btrfs_dirty_pages.btrfs_buffered_write
      0.57            -0.1        0.52 ?  3%  perf-profile.calltrace.cycles-pp.btrfs_read_lock_root_node.btrfs_search_slot.btrfs_lookup_file_extent.btrfs_get_extent.btrfs_set_extent_delalloc
     27.57            +0.1       27.71        perf-profile.calltrace.cycles-pp.btrfs_dirty_pages.btrfs_buffered_write.btrfs_do_write_iter.vfs_write.ksys_write
     98.02            +0.2       98.16        perf-profile.calltrace.cycles-pp.write
     97.96            +0.2       98.12        perf-profile.calltrace.cycles-pp.do_syscall_64.entry_SYSCALL_64_after_hwframe.write
     97.96            +0.2       98.12        perf-profile.calltrace.cycles-pp.entry_SYSCALL_64_after_hwframe.write
     97.92            +0.2       98.08        perf-profile.calltrace.cycles-pp.ksys_write.do_syscall_64.entry_SYSCALL_64_after_hwframe.write
     97.82            +0.2       97.98        perf-profile.calltrace.cycles-pp.btrfs_buffered_write.btrfs_do_write_iter.vfs_write.ksys_write.do_syscall_64
     97.90            +0.2       98.07        perf-profile.calltrace.cycles-pp.vfs_write.ksys_write.do_syscall_64.entry_SYSCALL_64_after_hwframe.write
     97.85            +0.2       98.02        perf-profile.calltrace.cycles-pp.btrfs_do_write_iter.vfs_write.ksys_write.do_syscall_64.entry_SYSCALL_64_after_hwframe
     34.80            +0.3       35.06        perf-profile.calltrace.cycles-pp._raw_spin_lock.__reserve_bytes.btrfs_reserve_metadata_bytes.btrfs_delalloc_reserve_metadata.btrfs_buffered_write
     34.69            +0.3       34.96        perf-profile.calltrace.cycles-pp.native_queued_spin_lock_slowpath._raw_spin_lock.__reserve_bytes.btrfs_reserve_metadata_bytes.btrfs_delalloc_reserve_metadata
     26.02            +0.3       26.31        perf-profile.calltrace.cycles-pp._raw_spin_lock.btrfs_block_rsv_release.btrfs_inode_rsv_release.btrfs_clear_delalloc_extent.clear_state_bit
     26.39            +0.3       26.68        perf-profile.calltrace.cycles-pp.__clear_extent_bit.btrfs_dirty_pages.btrfs_buffered_write.btrfs_do_write_iter.vfs_write
     26.34            +0.3       26.63        perf-profile.calltrace.cycles-pp.clear_state_bit.__clear_extent_bit.btrfs_dirty_pages.btrfs_buffered_write.btrfs_do_write_iter
     35.09            +0.3       35.38        perf-profile.calltrace.cycles-pp.__reserve_bytes.btrfs_reserve_metadata_bytes.btrfs_delalloc_reserve_metadata.btrfs_buffered_write.btrfs_do_write_iter
     35.09            +0.3       35.38        perf-profile.calltrace.cycles-pp.btrfs_reserve_metadata_bytes.btrfs_delalloc_reserve_metadata.btrfs_buffered_write.btrfs_do_write_iter.vfs_write
     26.33            +0.3       26.63        perf-profile.calltrace.cycles-pp.btrfs_clear_delalloc_extent.clear_state_bit.__clear_extent_bit.btrfs_dirty_pages.btrfs_buffered_write
     26.07            +0.3       26.37        perf-profile.calltrace.cycles-pp.btrfs_block_rsv_release.btrfs_inode_rsv_release.btrfs_clear_delalloc_extent.clear_state_bit.__clear_extent_bit
     26.08            +0.3       26.38        perf-profile.calltrace.cycles-pp.btrfs_inode_rsv_release.btrfs_clear_delalloc_extent.clear_state_bit.__clear_extent_bit.btrfs_dirty_pages
     35.18            +0.3       35.50        perf-profile.calltrace.cycles-pp.btrfs_delalloc_reserve_metadata.btrfs_buffered_write.btrfs_do_write_iter.vfs_write.ksys_write
     25.94            +0.3       26.26        perf-profile.calltrace.cycles-pp.native_queued_spin_lock_slowpath._raw_spin_lock.btrfs_block_rsv_release.btrfs_inode_rsv_release.btrfs_clear_delalloc_extent
      1.01 ?  4%      -0.1        0.88 ?  2%  perf-profile.children.cycles-pp.btrfs_set_extent_delalloc
      0.94 ?  4%      -0.1        0.83 ?  2%  perf-profile.children.cycles-pp.btrfs_get_extent
      0.83 ?  4%      -0.1        0.74 ?  2%  perf-profile.children.cycles-pp.btrfs_search_slot
      0.77 ?  4%      -0.1        0.68 ?  2%  perf-profile.children.cycles-pp.btrfs_lookup_file_extent
      0.36 ?  3%      -0.1        0.30 ?  5%  perf-profile.children.cycles-pp.read
      0.58            -0.1        0.52 ?  3%  perf-profile.children.cycles-pp.btrfs_read_lock_root_node
      0.56            -0.1        0.51 ?  2%  perf-profile.children.cycles-pp.__btrfs_tree_read_lock
      0.56            -0.1        0.51 ?  2%  perf-profile.children.cycles-pp.down_read
      0.54            -0.1        0.49 ?  2%  perf-profile.children.cycles-pp.rwsem_down_read_slowpath
      0.11 ?  4%      -0.0        0.06 ?  9%  perf-profile.children.cycles-pp.calc_available_free_space
      0.28 ?  4%      -0.0        0.24 ?  5%  perf-profile.children.cycles-pp.ksys_read
      0.36 ?  2%      -0.0        0.31 ?  2%  perf-profile.children.cycles-pp.prepare_pages
      0.26 ?  4%      -0.0        0.22 ?  6%  perf-profile.children.cycles-pp.vfs_read
      0.45 ?  2%      -0.0        0.42        perf-profile.children.cycles-pp.__schedule
      0.43 ?  2%      -0.0        0.40        perf-profile.children.cycles-pp.schedule
      0.23 ?  3%      -0.0        0.20 ?  2%  perf-profile.children.cycles-pp.__set_extent_bit
      0.14 ?  4%      -0.0        0.11 ?  4%  perf-profile.children.cycles-pp.btrfs_space_info_update_bytes_may_use
      0.42 ?  2%      -0.0        0.40        perf-profile.children.cycles-pp.schedule_preempt_disabled
      0.19            -0.0        0.16 ?  3%  perf-profile.children.cycles-pp.pagecache_get_page
      0.36 ?  2%      -0.0        0.34        perf-profile.children.cycles-pp.load_balance
      0.19 ?  3%      -0.0        0.16 ?  3%  perf-profile.children.cycles-pp.__filemap_get_folio
      0.37 ?  2%      -0.0        0.35        perf-profile.children.cycles-pp.newidle_balance
      0.31 ?  2%      -0.0        0.28        perf-profile.children.cycles-pp.cpu_startup_entry
      0.31 ?  2%      -0.0        0.28        perf-profile.children.cycles-pp.do_idle
      0.31 ?  3%      -0.0        0.29        perf-profile.children.cycles-pp.find_busiest_group
      0.31 ?  2%      -0.0        0.28        perf-profile.children.cycles-pp.secondary_startup_64_no_verify
      0.38 ?  2%      -0.0        0.35        perf-profile.children.cycles-pp.pick_next_task_fair
      0.30            -0.0        0.28 ?  2%  perf-profile.children.cycles-pp.start_secondary
      0.29 ?  3%      -0.0        0.27        perf-profile.children.cycles-pp.update_sg_lb_stats
      0.35            -0.0        0.33        perf-profile.children.cycles-pp.__close
      0.27 ?  2%      -0.0        0.25 ?  2%  perf-profile.children.cycles-pp.cpuidle_idle_call
      0.34            -0.0        0.32        perf-profile.children.cycles-pp.btrfs_evict_inode
      0.14            -0.0        0.12 ?  4%  perf-profile.children.cycles-pp.btrfs_read_folio
      0.34            -0.0        0.32        perf-profile.children.cycles-pp.evict
      0.15 ?  2%      -0.0        0.13 ?  5%  perf-profile.children.cycles-pp.prepare_uptodate_page
      0.35            -0.0        0.33        perf-profile.children.cycles-pp.__x64_sys_close
      0.20 ?  2%      -0.0        0.18 ?  2%  perf-profile.children.cycles-pp.acpi_idle_enter
      0.34            -0.0        0.33        perf-profile.children.cycles-pp.__dentry_kill
      0.35            -0.0        0.33        perf-profile.children.cycles-pp.__fput
      0.34            -0.0        0.33        perf-profile.children.cycles-pp.dentry_kill
      0.35            -0.0        0.33        perf-profile.children.cycles-pp.dput
      0.31            -0.0        0.29        perf-profile.children.cycles-pp.update_sd_lb_stats
      0.20            -0.0        0.18 ?  2%  perf-profile.children.cycles-pp.acpi_safe_halt
      0.12 ?  3%      -0.0        0.10 ?  3%  perf-profile.children.cycles-pp.alloc_extent_state
      0.12            -0.0        0.10 ?  4%  perf-profile.children.cycles-pp.kmem_cache_alloc
      0.15 ?  3%      -0.0        0.14 ?  3%  perf-profile.children.cycles-pp.set_extent_bit
      0.21            -0.0        0.20 ?  2%  perf-profile.children.cycles-pp.cpuidle_enter
      0.09 ?  5%      -0.0        0.07 ?  5%  perf-profile.children.cycles-pp.lock_and_cleanup_extent_if_need
      0.21            -0.0        0.19 ?  2%  perf-profile.children.cycles-pp.cpuidle_enter_state
      0.07 ?  6%      -0.0        0.06        perf-profile.children.cycles-pp.btrfs_folio_clamp_clear_checked
      0.11            -0.0        0.10 ?  4%  perf-profile.children.cycles-pp.btrfs_do_readpage
      0.08 ?  5%      -0.0        0.07        perf-profile.children.cycles-pp.btrfs_drop_pages
      0.09 ?  4%      -0.0        0.08        perf-profile.children.cycles-pp.truncate_inode_pages_range
      0.08 ?  5%      -0.0        0.07 ?  6%  perf-profile.children.cycles-pp.btrfs_write_check
      0.07            -0.0        0.06        perf-profile.children.cycles-pp.btrfs_create_new_inode
      0.08            -0.0        0.07        perf-profile.children.cycles-pp.lock_extent
      0.06            -0.0        0.05        perf-profile.children.cycles-pp.kmem_cache_free
      0.15            -0.0        0.14        perf-profile.children.cycles-pp.asm_sysvec_call_function_single
     99.48            +0.0       99.52        perf-profile.children.cycles-pp.do_syscall_64
     99.49            +0.0       99.53        perf-profile.children.cycles-pp.entry_SYSCALL_64_after_hwframe
      0.21            +0.1        0.26        perf-profile.children.cycles-pp.need_preemptive_reclaim
     60.25            +0.1       60.37        perf-profile.children.cycles-pp.btrfs_block_rsv_release
     59.96            +0.1       60.07        perf-profile.children.cycles-pp.btrfs_inode_rsv_release
     27.57            +0.1       27.71        perf-profile.children.cycles-pp.btrfs_dirty_pages
     98.06            +0.1       98.21        perf-profile.children.cycles-pp.write
     97.95            +0.2       98.11        perf-profile.children.cycles-pp.ksys_write
     97.83            +0.2       97.99        perf-profile.children.cycles-pp.btrfs_buffered_write
     97.94            +0.2       98.10        perf-profile.children.cycles-pp.vfs_write
     97.86            +0.2       98.02        perf-profile.children.cycles-pp.btrfs_do_write_iter
     26.57            +0.3       26.84        perf-profile.children.cycles-pp.__clear_extent_bit
     26.44            +0.3       26.72        perf-profile.children.cycles-pp.clear_state_bit
     35.50            +0.3       35.79        perf-profile.children.cycles-pp.__reserve_bytes
     26.37            +0.3       26.67        perf-profile.children.cycles-pp.btrfs_clear_delalloc_extent
     35.23            +0.3       35.52        perf-profile.children.cycles-pp.btrfs_reserve_metadata_bytes
     35.19            +0.3       35.50        perf-profile.children.cycles-pp.btrfs_delalloc_reserve_metadata
     95.80            +0.4       96.18        perf-profile.children.cycles-pp._raw_spin_lock
     95.21            +0.4       95.60        perf-profile.children.cycles-pp.native_queued_spin_lock_slowpath
      0.70            -0.0        0.67        perf-profile.self.cycles-pp._raw_spin_lock
      0.13 ?  2%      -0.0        0.11 ?  3%  perf-profile.self.cycles-pp.btrfs_space_info_update_bytes_may_use
      0.07 ?  5%      -0.0        0.06        perf-profile.self.cycles-pp.btrfs_folio_clamp_clear_checked
      0.08 ?  4%      -0.0        0.07        perf-profile.self.cycles-pp.kmem_cache_alloc
      0.07            -0.0        0.06        perf-profile.self.cycles-pp.memset_orig
      0.00            +0.1        0.08 ?  6%  perf-profile.self.cycles-pp.btrfs_block_rsv_release
     94.48            +0.4       94.88        perf-profile.self.cycles-pp.native_queued_spin_lock_slowpath


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.


-- 
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https://github.com/intel/lkp-tests/wiki