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X-OriginatorOrg: intel.com Hello, kernel test robot noticed a 22.1% improvement of fio.write_iops on: commit: 7cdd1682909c26fb8784755a37688215e8bfbc50 ("[PATCH v4 12/13] ext4: move pagecache_isize_extended() out of active handle") url: https://github.com/intel-lab-lkp/linux/commits/Zhang-Yi/ext4-add-did_zero-output-parameter-to-ext4_block_zero_page_range/20260328-162522 base: https://git.kernel.org/cgit/linux/kernel/git/tytso/ext4.git dev patch link: https://lore.kernel.org/all/20260327102939.1095257-13-yi.zhang@huaweicloud.com/ patch subject: [PATCH v4 12/13] ext4: move pagecache_isize_extended() out of active handle testcase: fio-basic config: x86_64-rhel-9.4 compiler: gcc-14 test machine: 64 threads 2 sockets Intel(R) Xeon(R) Gold 6346 CPU @ 3.10GHz (Ice Lake) with 256G memory parameters: runtime: 300s disk: 1HDD fs: ext4 nr_task: 1 test_size: 128G rw: write bs: 4k ioengine: falloc cpufreq_governor: performance Details are as below: --------------------------------------------------------------------------------------------------> The kernel config and materials to reproduce are available at: https://download.01.org/0day-ci/archive/20260331/202603312104.b8cce0af-lkp@intel.com ========================================================================================= bs/compiler/cpufreq_governor/disk/fs/ioengine/kconfig/nr_task/rootfs/runtime/rw/tbox_group/test_size/testcase: 4k/gcc-14/performance/1HDD/ext4/falloc/x86_64-rhel-9.4/1/debian-13-x86_64-20250902.cgz/300s/write/lkp-icl-2sp9/128G/fio-basic commit: ac5088c694 ("ext4: remove ctime/mtime update from ext4_alloc_file_blocks()") 7cdd168290 ("[PATCH v4 12/13] ext4: move pagecache_isize_extended() out of active handle") ac5088c694659c49 7cdd1682909c26fb8784755a376 ---------------- --------------------------- %stddev %change %stddev \ | \ 0.01 -0.0 0.00 fio.latency_250us% 0.11 ± 3% -0.0 0.08 ± 7% fio.latency_2us% 0.07 ± 2% -0.0 0.05 ± 3% fio.latency_4us% 34.85 ± 2% -18.0% 28.58 fio.time.elapsed_time 34.85 ± 2% -18.0% 28.58 fio.time.elapsed_time.max 24.00 -24.1% 18.22 fio.time.system_time 3744 ± 2% -17.8% 3078 fio.time.voluntary_context_switches 3807 ± 2% +22.1% 4649 fio.write_bw_MBps 846.67 -20.9% 669.33 fio.write_clat_90%_ns 854.67 -21.1% 674.67 fio.write_clat_95%_ns 870.67 -21.0% 688.00 fio.write_clat_99%_ns 834.60 -21.3% 656.75 fio.write_clat_mean_ns 974606 ± 2% +22.1% 1190280 fio.write_iops 2.331e+09 ± 2% -17.4% 1.926e+09 cpuidle..time 1.10 -5.8% 1.03 iostat.cpu.system 112890 ± 2% -14.9% 96120 turbostat.IRQ 1472 ± 4% +15.6% 1702 vmstat.io.bo 1.10 -0.1 1.04 mpstat.cpu.all.sys% 0.54 ± 2% +0.1 0.64 ± 3% mpstat.cpu.all.usr% 49.52 ± 21% -31.3% 34.03 ± 33% perf-sched.total_wait_time.max.ms 49.52 ± 21% -31.3% 34.03 ± 33% perf-sched.wait_time.max.ms.[unknown].[unknown].[unknown].[unknown].[unknown] 123.26 -5.1% 116.96 uptime.boot 7526 -5.3% 7128 uptime.idle 0.03 ± 7% +17.9% 0.03 ± 5% perf-stat.i.MPKI 0.29 ± 8% +0.1 0.38 perf-stat.i.branch-miss-rate% 4759878 ± 7% +33.3% 6346860 perf-stat.i.branch-misses 201390 ± 4% +19.8% 241185 ± 6% perf-stat.i.cache-misses 891976 +14.7% 1023336 perf-stat.i.cache-references 0.48 ± 2% +3.1% 0.49 perf-stat.i.cpi 3.807e+09 +1.5% 3.866e+09 perf-stat.i.cpu-cycles 70.29 +2.0% 71.71 perf-stat.i.cpu-migrations 382.22 ± 3% +19.4% 456.21 ± 4% perf-stat.i.minor-faults 382.22 ± 3% +19.4% 456.20 ± 4% perf-stat.i.page-faults 0.03 ± 6% +21.4% 0.03 ± 6% perf-stat.overall.MPKI 0.28 ± 9% +0.1 0.38 perf-stat.overall.branch-miss-rate% 18830 ± 5% -15.0% 16001 ± 5% perf-stat.overall.cycles-between-cache-misses 8436 -19.3% 6810 perf-stat.overall.path-length 4633589 ± 7% +32.5% 6139073 perf-stat.ps.branch-misses 197159 ± 5% +18.9% 234444 ± 6% perf-stat.ps.cache-misses 871990 +13.9% 993519 perf-stat.ps.cache-references 68.47 +1.4% 69.43 perf-stat.ps.cpu-migrations 379.37 ± 3% +18.3% 448.62 ± 3% perf-stat.ps.minor-faults 379.37 ± 3% +18.3% 448.62 ± 3% perf-stat.ps.page-faults 2.831e+11 -19.3% 2.285e+11 perf-stat.total.instructions 8.95 ± 91% -6.7 2.23 ±141% perf-profile.calltrace.cycles-pp.do_file_open.do_sys_openat2.__x64_sys_openat.do_syscall_64.entry_SYSCALL_64_after_hwframe 8.95 ± 91% -6.7 2.23 ±141% perf-profile.calltrace.cycles-pp.path_openat.do_file_open.do_sys_openat2.__x64_sys_openat.do_syscall_64 6.48 ± 86% -5.4 1.04 ±223% perf-profile.calltrace.cycles-pp.__x64_sys_openat.do_syscall_64.entry_SYSCALL_64_after_hwframe 6.48 ± 86% -5.4 1.04 ±223% perf-profile.calltrace.cycles-pp.do_sys_openat2.__x64_sys_openat.do_syscall_64.entry_SYSCALL_64_after_hwframe 5.42 ±109% -4.6 0.79 ±223% perf-profile.calltrace.cycles-pp.lruvec_stat_mod_folio.folio_remove_rmap_ptes.zap_present_ptes.zap_pte_range.zap_pmd_range 5.46 ± 47% -3.6 1.84 ±143% perf-profile.calltrace.cycles-pp.tlb_finish_mmu.exit_mmap.__mmput.exit_mm.do_exit 4.28 ± 73% -3.2 1.04 ±223% perf-profile.calltrace.cycles-pp.open_last_lookups.path_openat.do_file_open.do_sys_openat2.__x64_sys_openat 4.28 ± 73% -2.4 1.84 ±143% perf-profile.calltrace.cycles-pp.__tlb_batch_free_encoded_pages.tlb_finish_mmu.exit_mmap.__mmput.exit_mm 4.28 ± 73% -2.4 1.84 ±143% perf-profile.calltrace.cycles-pp.free_pages_and_swap_cache.__tlb_batch_free_encoded_pages.tlb_finish_mmu.exit_mmap.__mmput 3.40 ±101% -2.4 1.04 ±223% perf-profile.calltrace.cycles-pp.lookup_open.open_last_lookups.path_openat.do_file_open.do_sys_openat2 2.99 ±101% -1.2 1.84 ±143% perf-profile.calltrace.cycles-pp.folios_put_refs.free_pages_and_swap_cache.__tlb_batch_free_encoded_pages.tlb_finish_mmu.exit_mmap 2.99 ±101% -0.6 2.43 ±143% perf-profile.calltrace.cycles-pp.vfs_statx.vfs_fstatat.__do_sys_newfstatat.do_syscall_64.entry_SYSCALL_64_after_hwframe 8.96 ± 91% -6.7 2.23 ±141% perf-profile.children.cycles-pp.do_file_open 8.96 ± 91% -6.7 2.23 ±141% perf-profile.children.cycles-pp.path_openat 5.46 ± 47% -3.6 1.84 ±143% perf-profile.children.cycles-pp.tlb_finish_mmu 4.28 ± 73% -3.2 1.04 ±223% perf-profile.children.cycles-pp.open_last_lookups 3.40 ±101% -2.4 1.04 ±223% perf-profile.children.cycles-pp.lookup_open 3.40 ±101% -2.2 1.19 ±223% perf-profile.children.cycles-pp.link_path_walk 4.14 ±102% -2.0 2.18 ±149% perf-profile.children.cycles-pp.lruvec_stat_mod_folio 3.88 ±105% -1.7 2.18 ±149% perf-profile.children.cycles-pp.kernfs_fop_readdir 3.92 ±109% -1.5 2.43 ±143% perf-profile.children.cycles-pp.__do_sys_newfstatat 3.92 ±109% -1.5 2.43 ±143% perf-profile.children.cycles-pp.vfs_fstatat 2.99 ±101% -0.6 2.43 ±143% perf-profile.children.cycles-pp.vfs_statx 5.80 ± 74% +6.5 12.30 ± 22% perf-profile.children.cycles-pp.exc_page_fault 3.88 ±105% -3.9 0.00 perf-profile.self.cycles-pp.kernfs_fop_readdir 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