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@xxxxxxxxx>
| Closes: https://lore.kernel.org/oe-lkp/202409301043.629bea78-oliver.sang@xxxxxxxxx
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@xxxxxxxxx
=========================================================================================
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
