* [linux-next:master] [btrfs] 14f9161e87: fio.write_iops 13.1% improvement
@ 2026-06-15 14:50 kernel test robot
0 siblings, 0 replies; only message in thread
From: kernel test robot @ 2026-06-15 14:50 UTC (permalink / raw)
To: Mark Harmstone; +Cc: oe-lkp, lkp, David Sterba, linux-btrfs, oliver.sang
Hello,
kernel test robot noticed a 13.1% improvement of fio.write_iops on:
commit: 14f9161e872072075284b8afa4c3f929e199a0f6 ("btrfs: don't force DIO writes to be serialized")
https://git.kernel.org/cgit/linux/kernel/git/next/linux-next.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: btrfs
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/20260615/202606152223.d5cf620b-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/btrfs/falloc/x86_64-rhel-9.4/1/debian-13-x86_64-20250902.cgz/300s/write/lkp-icl-2sp9/128G/fio-basic
commit:
9bce95edb1 ("btrfs: move large data folios out of experimental features")
14f9161e87 ("btrfs: don't force DIO writes to be serialized")
9bce95edb1b4d280 14f9161e872072075284b8afa4c
---------------- ---------------------------
%stddev %change %stddev
\ | \
6154 +13.1% 6960 fio.write_bw_MBps
464.67 -16.1% 390.00 fio.write_clat_90%_ns
468.00 -16.1% 392.67 fio.write_clat_95%_ns
474.00 -15.8% 399.33 fio.write_clat_99%_ns
458.34 -15.9% 385.59 fio.write_clat_mean_ns
1575465 +13.1% 1781998 fio.write_iops
134710 ± 4% -7.6% 124437 ± 2% numa-numastat.node1.numa_hit
134733 ± 4% -7.6% 124458 ± 2% numa-vmstat.node1.numa_hit
156867 ± 2% -10.6% 140262 turbostat.IRQ
1.473e+09 -10.6% 1.317e+09 cpuidle..time
103066 ± 3% -11.2% 91502 cpuidle..usage
84.50 +5.2% 88.91 ± 2% perf-stat.i.cpu-migrations
80.85 +4.7% 84.65 ± 2% perf-stat.ps.cpu-migrations
323.49 ± 2% -7.4% 299.52 ± 4% sched_debug.cfs_rq:/.runnable_avg.stddev
323.01 ± 2% -7.3% 299.39 ± 4% sched_debug.cfs_rq:/.util_avg.stddev
253020 ± 5% -5.1% 240055 ± 3% proc-vmstat.numa_hit
186828 ± 7% -6.9% 173889 ± 5% proc-vmstat.numa_local
273378 ± 5% -5.8% 257473 ± 4% proc-vmstat.pgalloc_normal
156448 ± 9% -10.3% 140365 ± 6% proc-vmstat.pgfault
147056 ± 10% -10.6% 131405 ± 9% proc-vmstat.pgfree
8024 ± 22% -20.8% 6358 ± 11% proc-vmstat.pgreuse
43.66 ±101% -37.0 6.70 ±199% perf-profile.calltrace.cycles-pp.zap_pmd_range.__zap_vma_range.unmap_vmas.exit_mmap.__mmput
43.66 ±101% -37.0 6.70 ±199% perf-profile.calltrace.cycles-pp.zap_pte_range.zap_pmd_range.__zap_vma_range.unmap_vmas.exit_mmap
43.48 ±101% -36.9 6.61 ±202% perf-profile.calltrace.cycles-pp.__zap_vma_range.unmap_vmas.exit_mmap.__mmput.exit_mm
43.48 ±101% -36.7 6.79 ±196% perf-profile.calltrace.cycles-pp.unmap_vmas.exit_mmap.__mmput.exit_mm.do_exit
43.48 ±101% -35.4 8.12 ±206% perf-profile.calltrace.cycles-pp.__mmput.exit_mm.do_exit.do_group_exit.get_signal
43.48 ±101% -35.4 8.12 ±206% perf-profile.calltrace.cycles-pp.exit_mm.do_exit.do_group_exit.get_signal.arch_do_signal_or_restart
44.01 ± 99% -33.8 10.18 ±196% perf-profile.calltrace.cycles-pp.exit_mmap.__mmput.exit_mm.do_exit.do_group_exit
43.48 ±101% -33.2 10.31 ±163% perf-profile.calltrace.cycles-pp.arch_do_signal_or_restart.exit_to_user_mode_loop.do_syscall_64.entry_SYSCALL_64_after_hwframe
43.48 ±101% -33.2 10.31 ±163% perf-profile.calltrace.cycles-pp.do_exit.do_group_exit.get_signal.arch_do_signal_or_restart.exit_to_user_mode_loop
43.48 ±101% -33.2 10.31 ±163% perf-profile.calltrace.cycles-pp.do_group_exit.get_signal.arch_do_signal_or_restart.exit_to_user_mode_loop.do_syscall_64
43.48 ±101% -33.2 10.31 ±163% perf-profile.calltrace.cycles-pp.exit_to_user_mode_loop.do_syscall_64.entry_SYSCALL_64_after_hwframe
43.48 ±101% -33.2 10.31 ±163% perf-profile.calltrace.cycles-pp.get_signal.arch_do_signal_or_restart.exit_to_user_mode_loop.do_syscall_64.entry_SYSCALL_64_after_hwframe
26.09 ±111% -21.1 5.00 ±200% perf-profile.calltrace.cycles-pp.zap_present_ptes.zap_pte_range.zap_pmd_range.__zap_vma_range.unmap_vmas
12.03 ±120% -10.4 1.61 ±208% perf-profile.calltrace.cycles-pp.__tlb_batch_free_encoded_pages.tlb_flush_mmu.zap_pte_range.zap_pmd_range.__zap_vma_range
12.03 ±120% -10.4 1.61 ±208% perf-profile.calltrace.cycles-pp.free_pages_and_swap_cache.__tlb_batch_free_encoded_pages.tlb_flush_mmu.zap_pte_range.zap_pmd_range
12.03 ±120% -10.4 1.61 ±208% perf-profile.calltrace.cycles-pp.tlb_flush_mmu.zap_pte_range.zap_pmd_range.__zap_vma_range.unmap_vmas
9.05 ± 94% -9.0 0.00 perf-profile.calltrace.cycles-pp.folio_remove_rmap_ptes.zap_present_ptes.zap_pte_range.zap_pmd_range.__zap_vma_range
4.48 ±102% -2.1 2.34 ±150% perf-profile.calltrace.cycles-pp.asm_exc_page_fault
43.66 ±101% -37.0 6.70 ±199% perf-profile.children.cycles-pp.__zap_vma_range
43.66 ±101% -37.0 6.70 ±199% perf-profile.children.cycles-pp.zap_pmd_range
43.66 ±101% -37.0 6.70 ±199% perf-profile.children.cycles-pp.zap_pte_range
43.66 ±101% -36.8 6.88 ±193% perf-profile.children.cycles-pp.unmap_vmas
44.01 ± 99% -33.8 10.18 ±196% perf-profile.children.cycles-pp.exit_mm
44.19 ± 98% -33.7 10.46 ±190% perf-profile.children.cycles-pp.__mmput
44.19 ± 98% -33.7 10.46 ±190% perf-profile.children.cycles-pp.exit_mmap
43.48 ±101% -33.2 10.31 ±163% perf-profile.children.cycles-pp.arch_do_signal_or_restart
43.48 ±101% -33.2 10.31 ±163% perf-profile.children.cycles-pp.exit_to_user_mode_loop
43.48 ±101% -33.2 10.31 ±163% perf-profile.children.cycles-pp.get_signal
28.12 ±105% -23.1 5.00 ±200% perf-profile.children.cycles-pp.zap_present_ptes
12.03 ±120% -10.4 1.61 ±208% perf-profile.children.cycles-pp.tlb_flush_mmu
12.21 ±117% -10.3 1.88 ±176% perf-profile.children.cycles-pp.__tlb_batch_free_encoded_pages
12.21 ±117% -10.3 1.88 ±176% perf-profile.children.cycles-pp.free_pages_and_swap_cache
8.87 ± 98% -8.9 0.00 perf-profile.children.cycles-pp.folio_remove_rmap_ptes
4.84 ±101% -2.1 2.70 ±143% perf-profile.children.cycles-pp.asm_exc_page_fault
4.13 ±107% -2.0 2.15 ±158% perf-profile.children.cycles-pp.handle_mm_fault
4.13 ±107% -1.9 2.24 ±153% perf-profile.children.cycles-pp.do_user_addr_fault
4.13 ±107% -1.8 2.34 ±150% perf-profile.children.cycles-pp.exc_page_fault
19.24 ±114% -17.5 1.79 ±185% perf-profile.self.cycles-pp.zap_present_ptes
8.70 ±101% -8.7 0.00 perf-profile.self.cycles-pp.folio_remove_rmap_ptes
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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