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X-OriginatorOrg: intel.com Hello, kernel test robot noticed a 23.8% improvement of fio.write_iops on: commit: 1ad0f42823291bcac371dafd37533f5e8d92acc3 ("ext4: move pagecache_isize_extended() out of active handle") https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git master 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/20260430/202604301021.faab1f8a-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: 116c0bdac2 ("ext4: remove ctime/mtime update from ext4_alloc_file_blocks()") 1ad0f42823 ("ext4: move pagecache_isize_extended() out of active handle") 116c0bdac2ec059d 1ad0f42823291bcac371dafd375 ---------------- --------------------------- %stddev %change %stddev \ | \ 0.11 ± 5% -0.0 0.08 ± 7% fio.latency_2us% 0.07 ± 3% -0.0 0.05 ± 6% fio.latency_4us% 34.79 -19.1% 28.14 fio.time.elapsed_time 34.79 -19.1% 28.14 fio.time.elapsed_time.max 24.17 -26.0% 17.90 fio.time.system_time 3736 -18.7% 3037 fio.time.voluntary_context_switches 3812 +23.8% 4720 fio.write_bw_MBps 850.67 -22.7% 657.33 fio.write_clat_90%_ns 857.33 -22.4% 665.33 fio.write_clat_95%_ns 872.00 -22.5% 676.00 fio.write_clat_99%_ns 835.45 -22.7% 645.60 fio.write_clat_mean_ns 192.67 ± 28% +122.3% 428.28 ± 20% fio.write_clat_stddev 975889 +23.8% 1208502 fio.write_iops 1.13 -7.7% 1.05 iostat.cpu.system 146867 -17.0% 121930 turbostat.IRQ 2.317e+09 -17.6% 1.908e+09 cpuidle..time 121665 ± 9% -11.5% 107660 ± 5% cpuidle..usage 1.13 -0.1 1.04 mpstat.cpu.all.sys% 0.54 ± 2% +0.1 0.62 ± 2% mpstat.cpu.all.usr% 124.09 ± 2% -6.1% 116.50 uptime.boot 7577 ± 2% -6.3% 7099 uptime.idle 1507 ± 4% +13.8% 1714 vmstat.io.bo 1.58 ± 3% +9.7% 1.73 ± 2% vmstat.procs.r 256506 -3.5% 247467 proc-vmstat.numa_hit 281823 -4.4% 269466 proc-vmstat.pgalloc_normal 166349 -7.9% 153190 proc-vmstat.pgfault 159495 -7.7% 147154 proc-vmstat.pgfree 7811 ± 20% -45.1% 4288 proc-vmstat.pgpgout 7649 -8.2% 7019 ± 2% proc-vmstat.pgreuse 4.74 ± 63% -4.7 0.00 perf-profile.calltrace.cycles-pp.do_mprotect_pkey.__x64_sys_mprotect.do_syscall_64.entry_SYSCALL_64_after_hwframe 3.64 ±104% -3.1 0.56 ±223% perf-profile.calltrace.cycles-pp.acpi_idle_do_entry.acpi_idle_enter.cpuidle_enter_state.cpuidle_enter.cpuidle_idle_call 3.64 ±104% -3.1 0.56 ±223% perf-profile.calltrace.cycles-pp.acpi_idle_enter.cpuidle_enter_state.cpuidle_enter.cpuidle_idle_call.do_idle 3.64 ±104% -3.1 0.56 ±223% perf-profile.calltrace.cycles-pp.acpi_safe_halt.acpi_idle_do_entry.acpi_idle_enter.cpuidle_enter_state.cpuidle_enter 3.64 ±104% -3.1 0.56 ±223% perf-profile.calltrace.cycles-pp.cpuidle_enter.cpuidle_idle_call.do_idle.cpu_startup_entry.start_secondary 3.64 ±104% -3.1 0.56 ±223% perf-profile.calltrace.cycles-pp.cpuidle_enter_state.cpuidle_enter.cpuidle_idle_call.do_idle.cpu_startup_entry 3.64 ±104% -3.1 0.56 ±223% perf-profile.calltrace.cycles-pp.cpuidle_idle_call.do_idle.cpu_startup_entry.start_secondary.common_startup_64 4.95 ± 81% -3.4 1.54 ±149% perf-profile.children.cycles-pp.__split_vma 3.64 ±104% -3.1 0.56 ±223% perf-profile.children.cycles-pp.acpi_idle_do_entry 3.64 ±104% -3.1 0.56 ±223% perf-profile.children.cycles-pp.acpi_idle_enter 3.64 ±104% -3.1 0.56 ±223% perf-profile.children.cycles-pp.acpi_safe_halt 3.64 ±104% -3.1 0.56 ±223% perf-profile.children.cycles-pp.cpuidle_enter 3.64 ±104% -3.1 0.56 ±223% perf-profile.children.cycles-pp.cpuidle_enter_state 3.64 ±104% -3.1 0.56 ±223% perf-profile.children.cycles-pp.cpuidle_idle_call 3.64 ±104% -3.1 0.56 ±223% perf-profile.children.cycles-pp.pv_native_safe_halt 1.82 ±148% +5.8 7.59 ± 39% perf-profile.children.cycles-pp.__mmap_region 1.82 ±148% +6.5 8.34 ± 44% perf-profile.children.cycles-pp.do_mmap 1.82 ±148% +6.5 8.34 ± 44% perf-profile.children.cycles-pp.vm_mmap_pgoff 0.03 ± 7% +21.8% 0.04 ± 4% perf-stat.i.MPKI 0.26 +0.1 0.32 perf-stat.i.branch-miss-rate% 4548711 +21.7% 5537175 perf-stat.i.branch-misses 274432 ± 6% +20.4% 330549 ± 4% perf-stat.i.cache-misses 1860596 +8.1% 2011597 perf-stat.i.cache-references 0.47 +2.1% 0.48 perf-stat.i.cpi 2398 +3.0% 2470 perf-stat.i.minor-faults 2398 +3.0% 2470 perf-stat.i.page-faults 0.03 ± 6% +22.3% 0.04 ± 4% perf-stat.overall.MPKI 0.26 +0.1 0.32 perf-stat.overall.branch-miss-rate% 14.77 ± 6% +1.7 16.46 ± 4% perf-stat.overall.cache-miss-rate% 0.47 +1.8% 0.48 perf-stat.overall.cpi 14177 ± 6% -16.9% 11783 ± 5% perf-stat.overall.cycles-between-cache-misses 2.12 -1.8% 2.08 perf-stat.overall.ipc 8603 -19.7% 6911 perf-stat.overall.path-length 1.69e+09 -1.7% 1.662e+09 perf-stat.ps.branch-instructions 4424559 +21.0% 5353882 perf-stat.ps.branch-misses 267376 ± 6% +19.9% 320480 ± 4% perf-stat.ps.cache-misses 1810896 +7.5% 1947007 perf-stat.ps.cache-references 7.998e+09 -2.0% 7.838e+09 perf-stat.ps.instructions 2334 +2.5% 2393 perf-stat.ps.minor-faults 2334 +2.5% 2393 perf-stat.ps.page-faults 2.887e+11 -19.7% 2.319e+11 perf-stat.total.instructions 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