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Message-ID: <202409301043.629bea78-oliver.sang@intel.com>
Date: Mon, 30 Sep 2024 10:21:27 +0800
From: kernel test robot <oliver.sang@...el.com>
To: Lorenzo Stoakes <lorenzo.stoakes@...cle.com>
CC: <oe-lkp@...ts.linux.dev>, <lkp@...el.com>, <linux-kernel@...r.kernel.org>,
	Andrew Morton <akpm@...ux-foundation.org>, Mark Brown <broonie@...nel.org>,
	"Liam R. Howlett" <Liam.Howlett@...cle.com>, Vlastimil Babka
	<vbabka@...e.cz>, Bert Karwatzki <spasswolf@....de>, Jeff Xu
	<jeffxu@...omium.org>, Jiri Olsa <olsajiri@...il.com>, Kees Cook
	<kees@...nel.org>, Lorenzo Stoakes <lstoakes@...il.com>, Matthew Wilcox
	<willy@...radead.org>, "Paul E. McKenney" <paulmck@...nel.org>, Paul Moore
	<paul@...l-moore.com>, Sidhartha Kumar <sidhartha.kumar@...cle.com>, "Suren
 Baghdasaryan" <surenb@...gle.com>, <linux-mm@...ck.org>,
	<ying.huang@...el.com>, <feng.tang@...el.com>, <fengwei.yin@...el.com>,
	<oliver.sang@...el.com>
Subject: [linus:master] [mm]  cacded5e42:  aim9.brk_test.ops_per_sec -5.0%
 regression



Hello,

kernel test robot noticed a -5.0% regression of aim9.brk_test.ops_per_sec on:


commit: cacded5e42b9609b07b22d80c10f0076d439f7d1 ("mm: avoid using vma_merge() for new VMAs")
https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git master

testcase: aim9
test machine: 48 threads 2 sockets Intel(R) Xeon(R) CPU E5-2697 v2 @ 2.70GHz (Ivy Bridge-EP) with 64G memory
parameters:

	testtime: 300s
	test: brk_test
	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@...el.com>
| Closes: https://lore.kernel.org/oe-lkp/202409301043.629bea78-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/20240930/202409301043.629bea78-oliver.sang@intel.com

=========================================================================================
compiler/cpufreq_governor/kconfig/rootfs/tbox_group/test/testcase/testtime:
  gcc-12/performance/x86_64-rhel-8.3/debian-12-x86_64-20240206.cgz/lkp-ivb-2ep2/brk_test/aim9/300s

commit: 
  fc21959f74 ("mm: abstract vma_expand() to use vma_merge_struct")
  cacded5e42 ("mm: avoid using vma_merge() for new VMAs")

fc21959f74bc1138 cacded5e42b9609b07b22d80c10 
---------------- --------------------------- 
         %stddev     %change         %stddev
             \          |                \  
   1322908            -5.0%    1256536        aim9.brk_test.ops_per_sec
    201.54            +2.9%     207.44        aim9.time.system_time
     97.58            -6.0%      91.75        aim9.time.user_time
      0.04 ± 82%    -100.0%       0.00        perf-sched.sch_delay.avg.ms.__cond_resched.down_write.do_brk_flags.__do_sys_brk.do_syscall_64
      0.10 ± 60%    -100.0%       0.00        perf-sched.sch_delay.max.ms.__cond_resched.down_write.do_brk_flags.__do_sys_brk.do_syscall_64
      0.04 ± 82%    -100.0%       0.00        perf-sched.wait_time.avg.ms.__cond_resched.down_write.do_brk_flags.__do_sys_brk.do_syscall_64
      0.10 ± 60%    -100.0%       0.00        perf-sched.wait_time.max.ms.__cond_resched.down_write.do_brk_flags.__do_sys_brk.do_syscall_64
  8.33e+08            +3.9%  8.654e+08        perf-stat.i.branch-instructions
      1.15            -0.1        1.09        perf-stat.i.branch-miss-rate%
  12964626            -1.9%   12711922        perf-stat.i.branch-misses
      1.11            -7.4%       1.03        perf-stat.i.cpi
 3.943e+09            +6.0%   4.18e+09        perf-stat.i.instructions
      0.91            +7.9%       0.98        perf-stat.i.ipc
      0.29 ±  2%      -9.1%       0.27 ±  4%  perf-stat.overall.MPKI
      1.56            -0.1        1.47        perf-stat.overall.branch-miss-rate%
      1.08            -6.8%       1.01        perf-stat.overall.cpi
      0.92            +7.2%       0.99        perf-stat.overall.ipc
 8.303e+08            +3.9%  8.627e+08        perf-stat.ps.branch-instructions
  12931205            -2.0%   12678170        perf-stat.ps.branch-misses
  3.93e+09            +6.0%  4.167e+09        perf-stat.ps.instructions
 1.184e+12            +6.1%  1.256e+12        perf-stat.total.instructions
      7.16 ±  2%      -0.4        6.76 ±  4%  perf-profile.calltrace.cycles-pp.entry_SYSRETQ_unsafe_stack.brk
      5.72 ±  2%      -0.4        5.35 ±  3%  perf-profile.calltrace.cycles-pp.perf_event_mmap_event.perf_event_mmap.do_brk_flags.__do_sys_brk.do_syscall_64
      6.13 ±  2%      -0.3        5.84 ±  3%  perf-profile.calltrace.cycles-pp.perf_event_mmap.do_brk_flags.__do_sys_brk.do_syscall_64.entry_SYSCALL_64_after_hwframe
      0.83 ± 11%      -0.1        0.71 ±  5%  perf-profile.calltrace.cycles-pp.__vm_enough_memory.do_brk_flags.__do_sys_brk.do_syscall_64.entry_SYSCALL_64_after_hwframe
      0.00            +0.6        0.58 ±  5%  perf-profile.calltrace.cycles-pp.mas_leaf_max_gap.mas_update_gap.mas_store_prealloc.vma_expand.vma_merge_new_range
     16.73 ±  2%      +0.6       17.34        perf-profile.calltrace.cycles-pp.do_brk_flags.__do_sys_brk.do_syscall_64.entry_SYSCALL_64_after_hwframe.brk
      0.00            +0.7        0.66 ±  6%  perf-profile.calltrace.cycles-pp.mas_wr_store_type.mas_preallocate.vma_expand.vma_merge_new_range.do_brk_flags
     24.21            +0.7       24.90        perf-profile.calltrace.cycles-pp.do_syscall_64.entry_SYSCALL_64_after_hwframe.brk
     23.33            +0.7       24.05 ±  2%  perf-profile.calltrace.cycles-pp.__do_sys_brk.do_syscall_64.entry_SYSCALL_64_after_hwframe.brk
      0.00            +0.8        0.82 ±  4%  perf-profile.calltrace.cycles-pp.vma_complete.vma_expand.vma_merge_new_range.do_brk_flags.__do_sys_brk
      0.00            +0.9        0.87 ±  5%  perf-profile.calltrace.cycles-pp.mas_update_gap.mas_store_prealloc.vma_expand.vma_merge_new_range.do_brk_flags
      0.00            +1.1        1.07 ±  9%  perf-profile.calltrace.cycles-pp.vma_prepare.vma_expand.vma_merge_new_range.do_brk_flags.__do_sys_brk
      0.00            +1.1        1.10 ±  6%  perf-profile.calltrace.cycles-pp.mas_preallocate.vma_expand.vma_merge_new_range.do_brk_flags.__do_sys_brk
      0.00            +2.3        2.26 ±  5%  perf-profile.calltrace.cycles-pp.mas_store_prealloc.vma_expand.vma_merge_new_range.do_brk_flags.__do_sys_brk
      0.00            +7.6        7.56 ±  3%  perf-profile.calltrace.cycles-pp.vma_expand.vma_merge_new_range.do_brk_flags.__do_sys_brk.do_syscall_64
      0.00            +8.6        8.62 ±  4%  perf-profile.calltrace.cycles-pp.vma_merge_new_range.do_brk_flags.__do_sys_brk.do_syscall_64.entry_SYSCALL_64_after_hwframe
      7.74 ±  2%      -0.4        7.30 ±  4%  perf-profile.children.cycles-pp.entry_SYSRETQ_unsafe_stack
      5.81 ±  2%      -0.4        5.43 ±  3%  perf-profile.children.cycles-pp.perf_event_mmap_event
      6.18 ±  2%      -0.3        5.88 ±  3%  perf-profile.children.cycles-pp.perf_event_mmap
      3.93            -0.2        3.73 ±  3%  perf-profile.children.cycles-pp.perf_iterate_sb
      0.22 ± 29%      -0.1        0.08 ± 17%  perf-profile.children.cycles-pp.may_expand_vm
      0.96 ±  3%      -0.1        0.83 ±  4%  perf-profile.children.cycles-pp.vma_complete
      0.61 ± 14%      -0.1        0.52 ±  7%  perf-profile.children.cycles-pp.percpu_counter_add_batch
      0.15 ±  7%      -0.1        0.08 ± 20%  perf-profile.children.cycles-pp.brk_test
      0.08 ± 11%      +0.0        0.12 ± 14%  perf-profile.children.cycles-pp.mas_prev_setup
      0.17 ± 12%      +0.1        0.27 ± 10%  perf-profile.children.cycles-pp.mas_wr_store_entry
      0.00            +0.2        0.15 ± 11%  perf-profile.children.cycles-pp.mas_next_range
      0.19 ±  8%      +0.2        0.38 ± 10%  perf-profile.children.cycles-pp.mas_next_slot
      0.34 ± 17%      +0.3        0.64 ±  6%  perf-profile.children.cycles-pp.mas_prev_slot
     23.40            +0.7       24.12 ±  2%  perf-profile.children.cycles-pp.__do_sys_brk
      0.00            +7.6        7.59 ±  3%  perf-profile.children.cycles-pp.vma_expand
      0.00            +8.7        8.66 ±  4%  perf-profile.children.cycles-pp.vma_merge_new_range
      1.61 ± 10%      -0.9        0.69 ±  8%  perf-profile.self.cycles-pp.do_brk_flags
      7.64 ±  2%      -0.4        7.20 ±  4%  perf-profile.self.cycles-pp.entry_SYSRETQ_unsafe_stack
      0.22 ± 30%      -0.1        0.08 ± 17%  perf-profile.self.cycles-pp.may_expand_vm
      0.57 ± 15%      -0.1        0.46 ±  6%  perf-profile.self.cycles-pp.percpu_counter_add_batch
      0.15 ±  7%      -0.1        0.08 ± 20%  perf-profile.self.cycles-pp.brk_test
      0.20 ±  5%      -0.0        0.18 ±  4%  perf-profile.self.cycles-pp.anon_vma_interval_tree_insert
      0.07 ± 18%      +0.0        0.10 ± 18%  perf-profile.self.cycles-pp.mas_prev_setup
      0.00            +0.1        0.09 ± 12%  perf-profile.self.cycles-pp.mas_next_range
      0.36 ±  8%      +0.1        0.45 ±  6%  perf-profile.self.cycles-pp.perf_event_mmap
      0.15 ± 13%      +0.1        0.25 ± 14%  perf-profile.self.cycles-pp.mas_wr_store_entry
      0.17 ± 11%      +0.2        0.37 ± 11%  perf-profile.self.cycles-pp.mas_next_slot
      0.34 ± 17%      +0.3        0.64 ±  6%  perf-profile.self.cycles-pp.mas_prev_slot
      0.00            +0.3        0.33 ±  5%  perf-profile.self.cycles-pp.vma_merge_new_range
      0.00            +0.8        0.81 ±  9%  perf-profile.self.cycles-pp.vma_expand




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


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