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 /iNSq6Tk 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 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: Hello, kernel test robot noticed a 15.1% improvement of stress-ng.lockofd.ops_per_sec on: commit: e47c897a29491ade20b27612fdd3107c39a07357 ("slab: add sheaves to most caches") https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git master testcase: stress-ng config: x86_64-rhel-9.4 compiler: gcc-14 test machine: 256 threads 2 sockets Intel(R) Xeon(R) 6768P CPU @ 2.4GHz (Granite Rapids) with 64G memory parameters: nr_threads: 100% disk: 1SSD testtime: 60s fs: xfs test: lockofd cpufreq_governor: performance Details are as below: --------------------------------------------------------------------------------------------------> The kernel config and materials to reproduce are available at: https://download.01.org/0day-ci/archive/20260318/202603181437.2b4fc5d4-lkp@intel.com ========================================================================================= compiler/cpufreq_governor/disk/fs/kconfig/nr_threads/rootfs/tbox_group/test/testcase/testtime: gcc-14/performance/1SSD/xfs/x86_64-rhel-9.4/100%/debian-13-x86_64-20250902.cgz/lkp-gnr-2sp4/lockofd/stress-ng/60s commit: 4b038a9670 ("slub: keep empty main sheaf as spare in __pcs_replace_empty_main()") e47c897a29 ("slab: add sheaves to most caches") 4b038a9670154e8b e47c897a29491ade20b27612fdd ---------------- --------------------------- %stddev %change %stddev \ | \ 1.912e+09 ± 3% +15.1% 2.201e+09 ± 2% stress-ng.lockofd.ops 31892971 ± 3% +15.1% 36721113 ± 2% stress-ng.lockofd.ops_per_sec 0.28 ± 2% +0.0 0.31 ± 2% mpstat.cpu.all.irq% 0.33 ± 3% +12.5% 0.38 ± 2% turbostat.IPC 17.77 ± 2% -19.2% 14.36 ± 5% turbostat.RAMWatt 6374 ± 13% -91.1% 568.33 ± 47% perf-c2c.DRAM.local 209276 ± 12% -69.0% 64817 ± 40% perf-c2c.DRAM.remote 475369 ± 14% -64.4% 169285 ± 36% perf-c2c.HITM.local 24507 ± 12% -49.3% 12424 ± 40% perf-c2c.HITM.remote 499876 ± 13% -63.6% 181710 ± 36% perf-c2c.HITM.total 4.03 ± 11% -49.8% 2.02 ± 10% perf-stat.i.MPKI 7.069e+10 ± 3% +14.3% 8.083e+10 perf-stat.i.branch-instructions 0.40 -0.1 0.33 perf-stat.i.branch-miss-rate% 22.12 ± 13% -6.0 16.15 ± 10% perf-stat.i.cache-miss-rate% 1.229e+09 ± 7% -43.2% 6.977e+08 ± 9% perf-stat.i.cache-misses 5.599e+09 ± 5% -22.7% 4.329e+09 ± 2% perf-stat.i.cache-references 2.99 ± 3% -10.6% 2.67 ± 2% perf-stat.i.cpi 748.51 ± 7% +78.5% 1336 ± 9% perf-stat.i.cycles-between-cache-misses 3.062e+11 ± 3% +12.9% 3.456e+11 perf-stat.i.instructions 0.33 ± 3% +11.8% 0.37 ± 2% perf-stat.i.ipc 4.03 ± 11% -49.9% 2.02 ± 10% perf-stat.overall.MPKI 0.40 -0.1 0.33 perf-stat.overall.branch-miss-rate% 22.10 ± 13% -6.0 16.11 ± 10% perf-stat.overall.cache-miss-rate% 2.99 ± 3% -10.6% 2.67 ± 2% perf-stat.overall.cpi 748.41 ± 7% +78.6% 1336 ± 9% perf-stat.overall.cycles-between-cache-misses 0.34 ± 3% +11.8% 0.37 ± 2% perf-stat.overall.ipc 6.915e+10 ± 3% +13.8% 7.871e+10 ± 2% perf-stat.ps.branch-instructions 1.201e+09 ± 7% -43.5% 6.784e+08 ± 9% perf-stat.ps.cache-misses 5.475e+09 ± 5% -23.0% 4.216e+09 ± 2% perf-stat.ps.cache-references 2.995e+11 ± 3% +12.4% 3.366e+11 ± 2% perf-stat.ps.instructions 1.829e+13 ± 3% +10.2% 2.015e+13 ± 4% perf-stat.total.instructions 3.09 ± 2% -1.6 1.52 ± 2% perf-profile.calltrace.cycles-pp.kmem_cache_alloc_noprof.posix_lock_inode.fcntl_setlk.do_fcntl.__x64_sys_fcntl 3.25 ± 2% -1.2 2.06 ± 3% perf-profile.calltrace.cycles-pp.kmem_cache_free.posix_lock_inode.fcntl_setlk.do_fcntl.__x64_sys_fcntl 93.17 -0.5 92.64 perf-profile.calltrace.cycles-pp.posix_lock_inode.fcntl_setlk.do_fcntl.__x64_sys_fcntl.do_syscall_64 95.62 -0.3 95.36 perf-profile.calltrace.cycles-pp.fcntl_setlk.do_fcntl.__x64_sys_fcntl.do_syscall_64.entry_SYSCALL_64_after_hwframe 1.15 ± 4% -0.1 1.00 ± 2% perf-profile.calltrace.cycles-pp.locks_insert_lock_ctx.posix_lock_inode.fcntl_setlk.do_fcntl.__x64_sys_fcntl 0.72 -0.1 0.58 ± 2% perf-profile.calltrace.cycles-pp.locks_release_private.posix_lock_inode.fcntl_setlk.do_fcntl.__x64_sys_fcntl 1.04 ± 4% -0.1 0.92 ± 2% perf-profile.calltrace.cycles-pp._raw_spin_lock.locks_insert_lock_ctx.posix_lock_inode.fcntl_setlk.do_fcntl 96.32 -0.1 96.21 perf-profile.calltrace.cycles-pp.do_fcntl.__x64_sys_fcntl.do_syscall_64.entry_SYSCALL_64_after_hwframe 97.45 +0.1 97.54 perf-profile.calltrace.cycles-pp.do_syscall_64.entry_SYSCALL_64_after_hwframe 0.66 ± 4% +0.1 0.76 ± 7% perf-profile.calltrace.cycles-pp.stress_lockofd_contention 97.61 +0.1 97.71 perf-profile.calltrace.cycles-pp.entry_SYSCALL_64_after_hwframe 0.74 ± 2% +0.3 1.07 perf-profile.calltrace.cycles-pp.kmem_cache_free.fcntl_setlk.do_fcntl.__x64_sys_fcntl.do_syscall_64 3.66 ± 3% -1.6 2.10 perf-profile.children.cycles-pp.kmem_cache_alloc_noprof 1.66 ± 3% -1.5 0.15 ± 9% perf-profile.children.cycles-pp.___slab_alloc 1.66 ± 4% -1.2 0.42 ± 8% perf-profile.children.cycles-pp.__slab_free 4.08 -0.9 3.16 ± 2% perf-profile.children.cycles-pp.kmem_cache_free 0.97 ± 5% -0.9 0.06 ± 9% perf-profile.children.cycles-pp._raw_spin_lock_irqsave 0.69 ± 5% -0.6 0.08 ± 8% perf-profile.children.cycles-pp.get_partial_node 93.45 -0.6 92.87 perf-profile.children.cycles-pp.posix_lock_inode 0.62 ± 4% -0.5 0.07 ± 12% perf-profile.children.cycles-pp.__put_partials 95.72 -0.2 95.48 perf-profile.children.cycles-pp.fcntl_setlk 0.46 ± 5% -0.2 0.29 perf-profile.children.cycles-pp.syscall_return_via_sysret 1.16 ± 4% -0.1 1.01 ± 2% perf-profile.children.cycles-pp.locks_insert_lock_ctx 0.82 -0.1 0.70 ± 2% perf-profile.children.cycles-pp.locks_release_private 0.31 -0.1 0.21 ± 2% perf-profile.children.cycles-pp.__locks_delete_block 96.34 -0.1 96.24 perf-profile.children.cycles-pp.do_fcntl 0.15 ± 3% -0.0 0.11 ± 14% perf-profile.children.cycles-pp.__libc_fcntl64 0.16 ± 3% -0.0 0.13 ± 5% perf-profile.children.cycles-pp.stress_mwc16 0.12 ± 3% -0.0 0.10 ± 5% perf-profile.children.cycles-pp.locks_copy_lock 0.18 -0.0 0.17 ± 2% perf-profile.children.cycles-pp.tick_nohz_handler 0.15 -0.0 0.14 perf-profile.children.cycles-pp.entry_SYSCALL_64_safe_stack 0.07 +0.0 0.08 perf-profile.children.cycles-pp.locks_get_lock_context 0.10 ± 3% +0.0 0.11 perf-profile.children.cycles-pp.x64_sys_call 0.13 ± 5% +0.0 0.16 ± 3% perf-profile.children.cycles-pp.entry_SYSCALL_64 0.07 +0.0 0.10 ± 4% perf-profile.children.cycles-pp.stress_mwc64 0.15 ± 3% +0.0 0.18 ± 3% perf-profile.children.cycles-pp.flock64_to_posix_lock 0.29 +0.0 0.32 ± 2% perf-profile.children.cycles-pp.arch_exit_to_user_mode_prepare 0.11 ± 4% +0.0 0.15 ± 2% perf-profile.children.cycles-pp.__init_waitqueue_head 0.23 ± 4% +0.1 0.28 perf-profile.children.cycles-pp.fdget_raw 0.32 ± 4% +0.1 0.37 perf-profile.children.cycles-pp.entry_SYSRETQ_unsafe_stack 0.71 ± 3% +0.1 0.78 ± 7% perf-profile.children.cycles-pp.stress_lockofd_contention 97.58 +0.1 97.66 perf-profile.children.cycles-pp.do_syscall_64 0.42 ± 4% +0.2 0.58 perf-profile.children.cycles-pp.__pi_memset 0.00 +0.2 0.22 ± 9% perf-profile.children.cycles-pp.__kmem_cache_alloc_bulk 0.00 +0.2 0.23 ± 7% perf-profile.children.cycles-pp.__pcs_replace_empty_main 1.59 ± 3% -1.2 0.42 ± 8% perf-profile.self.cycles-pp.__slab_free 0.95 ± 2% -0.9 0.06 ± 7% perf-profile.self.cycles-pp.___slab_alloc 0.24 ± 2% -0.2 0.06 ± 13% perf-profile.self.cycles-pp.get_partial_node 1.42 ± 3% -0.2 1.24 ± 2% perf-profile.self.cycles-pp.kmem_cache_alloc_noprof 0.46 ± 5% -0.2 0.29 perf-profile.self.cycles-pp.syscall_return_via_sysret 0.79 -0.2 0.64 ± 2% perf-profile.self.cycles-pp.locks_release_private 0.30 -0.1 0.20 ± 2% perf-profile.self.cycles-pp.__locks_delete_block 0.51 ± 8% -0.1 0.43 ± 5% perf-profile.self.cycles-pp.locks_unlink_lock_ctx 0.09 -0.1 0.02 ± 99% perf-profile.self.cycles-pp.__put_partials 0.13 ± 3% -0.0 0.09 ± 17% perf-profile.self.cycles-pp.__libc_fcntl64 0.15 ± 3% -0.0 0.12 ± 4% perf-profile.self.cycles-pp.stress_mwc16 0.12 ± 6% -0.0 0.08 ± 4% perf-profile.self.cycles-pp.locks_insert_lock_ctx 0.18 ± 2% -0.0 0.15 ± 3% perf-profile.self.cycles-pp.entry_SYSCALL_64_after_hwframe 0.12 -0.0 0.09 ± 4% perf-profile.self.cycles-pp.locks_copy_lock 0.11 ± 4% -0.0 0.10 perf-profile.self.cycles-pp.entry_SYSCALL_64_safe_stack 0.06 +0.0 0.07 perf-profile.self.cycles-pp.locks_get_lock_context 0.09 ± 4% +0.0 0.10 perf-profile.self.cycles-pp.x64_sys_call 0.13 ± 5% +0.0 0.16 ± 3% perf-profile.self.cycles-pp.entry_SYSCALL_64 0.13 ± 5% +0.0 0.16 ± 3% perf-profile.self.cycles-pp.flock64_to_posix_lock 0.06 ± 6% +0.0 0.09 perf-profile.self.cycles-pp.stress_mwc64 0.27 ± 2% +0.0 0.30 ± 2% perf-profile.self.cycles-pp.arch_exit_to_user_mode_prepare 0.14 ± 4% +0.0 0.18 ± 2% perf-profile.self.cycles-pp.do_fcntl 0.08 ± 4% +0.0 0.11 ± 4% perf-profile.self.cycles-pp.__init_waitqueue_head 0.22 ± 4% +0.1 0.27 perf-profile.self.cycles-pp.fdget_raw 0.31 ± 4% +0.1 0.36 ± 2% perf-profile.self.cycles-pp.entry_SYSRETQ_unsafe_stack 0.24 ± 4% +0.1 0.29 perf-profile.self.cycles-pp.do_syscall_64 0.24 ± 2% +0.1 0.30 ± 2% perf-profile.self.cycles-pp.__x64_sys_fcntl 0.42 ± 2% +0.1 0.48 perf-profile.self.cycles-pp.fcntl_setlk 0.00 +0.1 0.06 ± 7% perf-profile.self.cycles-pp.__kmem_cache_alloc_bulk 0.67 ± 4% +0.1 0.75 ± 7% perf-profile.self.cycles-pp.stress_lockofd_contention 0.40 ± 4% +0.2 0.56 ± 2% perf-profile.self.cycles-pp.__pi_memset 1.57 +1.0 2.56 perf-profile.self.cycles-pp.kmem_cache_free 60.77 +1.9 62.63 perf-profile.self.cycles-pp.posix_lock_inode 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