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X-OriginatorOrg: intel.com Hello, kernel test robot noticed a 6.0% regression of fio.write_iops on: commit: aed9dfbe32e50cd99a0022529d54a1a9fd035aca ("btrfs: inhibit extent buffer writeback to prevent COW amplification") https://git.kernel.org/cgit/linux/kernel/git/next/linux-next.git master [still regression on linux-next/master b5d083a3ed1e2798396d5e491432e887da8d4a06] 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: randwrite bs: 4k ioengine: sync cpufreq_governor: performance In addition to that, the commit also has significant impact on the following tests: +------------------+--------------------------------------------+ | testcase: change | fio-basic: fio.write_iops 8.2% regression | | test parameters | bs=4k | | | cpufreq_governor=performance | | | disk=1HDD | | | fs=btrfs | | | ioengine=posixaio | | | nr_task=1 | | | runtime=300s | | | rw=randwrite | | | test_size=128G | +------------------+--------------------------------------------+ 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 | Closes: https://lore.kernel.org/oe-lkp/202603221745.e399d455-lkp@intel.com Details are as below: --------------------------------------------------------------------------------------------------> The kernel config and materials to reproduce are available at: https://download.01.org/0day-ci/archive/20260322/202603221745.e399d455-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/sync/x86_64-rhel-9.4/1/debian-13-x86_64-20250902.cgz/300s/randwrite/lkp-icl-2sp9/128G/fio-basic commit: 711f4cc50f ("btrfs: extract the max compression chunk size into a macro") aed9dfbe32 ("btrfs: inhibit extent buffer writeback to prevent COW amplification") 711f4cc50ffd7fb0 aed9dfbe32e50cd99a0022529d5 ---------------- --------------------------- %stddev %change %stddev \ | \ 0.91 +0.8 1.73 ± 8% fio.latency_1000us% 0.03 ± 3% +0.0 0.05 ± 10% fio.latency_100ms% 0.01 +0.0 0.02 ± 15% fio.latency_250ms% 0.32 ± 3% +0.1 0.39 ± 4% fio.latency_2ms% 0.05 ± 8% +0.0 0.06 ± 8% fio.latency_4ms% 0.05 +0.0 0.05 fio.latency_500ms% 37.80 -0.8 36.97 fio.latency_500us% 3850324 -6.0% 3620652 fio.time.file_system_outputs 568359 -4.0% 545774 fio.time.voluntary_context_switches 481290 -6.0% 452581 fio.workload 6.26 -6.0% 5.89 fio.write_bw_MBps 452608 +2.0% 461482 fio.write_clat_95%_ns 1460906 +16.4% 1701205 ± 5% fio.write_clat_99%_ns 622742 +6.4% 662332 fio.write_clat_mean_ns 9948994 +2.6% 10203906 fio.write_clat_stddev 1603 -6.0% 1508 fio.write_iops 1.66 +6.4% 1.76 iostat.cpu.iowait 0.99 +6.2% 1.05 turbostat.IPC 1.67 +0.1 1.77 mpstat.cpu.all.iowait% 0.01 ± 6% +0.0 0.01 ± 9% mpstat.cpu.all.soft% 0.15 ± 2% +0.0 0.16 ± 3% mpstat.cpu.all.sys% 11917 +38.9% 16552 ± 5% vmstat.io.bo 1.07 +6.2% 1.14 vmstat.procs.b 11584 -2.4% 11304 vmstat.system.cs 1.554e+08 ± 4% +9.3% 1.699e+08 ± 4% perf-stat.i.branch-instructions 3759835 ± 2% +6.9% 4019376 ± 2% perf-stat.i.cache-references 11649 -2.5% 11353 perf-stat.i.context-switches 1.03 -8.9% 0.94 perf-stat.i.cpi 8.214e+08 ± 4% +9.5% 8.995e+08 ± 4% perf-stat.i.instructions 1.06 +11.4% 1.18 perf-stat.i.ipc 1.07 -6.2% 1.00 perf-stat.overall.cpi 0.94 +6.6% 1.00 perf-stat.overall.ipc 513899 ± 4% +16.5% 598695 ± 5% perf-stat.overall.path-length 1.55e+08 ± 4% +9.3% 1.694e+08 ± 4% perf-stat.ps.branch-instructions 3750681 ± 2% +6.9% 4009862 ± 2% perf-stat.ps.cache-references 11611 -2.5% 11316 perf-stat.ps.context-switches 8.193e+08 ± 4% +9.5% 8.972e+08 ± 4% perf-stat.ps.instructions 2.473e+11 ± 4% +9.5% 2.708e+11 ± 4% perf-stat.total.instructions 4.36 ± 7% -0.9 3.48 ± 17% perf-profile.calltrace.cycles-pp.btrfs_buffered_write.btrfs_direct_write.btrfs_do_write_iter.vfs_write.ksys_write 1.71 ± 33% -0.6 1.08 ± 33% perf-profile.calltrace.cycles-pp.btrfs_unpin_extent_cache.btrfs_finish_one_ordered.btrfs_work_helper.process_one_work.worker_thread 0.87 ± 14% +0.3 1.17 ± 12% perf-profile.calltrace.cycles-pp.btrfs_cross_ref_exist.can_nocow_file_extent.run_delalloc_nocow.writepage_delalloc.extent_writepage 1.18 ± 15% +0.5 1.66 ± 10% perf-profile.calltrace.cycles-pp.__irq_exit_rcu.sysvec_apic_timer_interrupt.asm_sysvec_apic_timer_interrupt.pv_native_safe_halt.acpi_safe_halt 1.12 ± 15% +0.5 1.62 ± 11% perf-profile.calltrace.cycles-pp.handle_softirqs.__irq_exit_rcu.sysvec_apic_timer_interrupt.asm_sysvec_apic_timer_interrupt.pv_native_safe_halt 0.20 ±141% +0.8 0.97 ± 18% perf-profile.calltrace.cycles-pp.rcu_do_batch.rcu_core.handle_softirqs.__irq_exit_rcu.sysvec_apic_timer_interrupt 0.25 ±141% +0.9 1.11 ± 13% perf-profile.calltrace.cycles-pp.rcu_core.handle_softirqs.__irq_exit_rcu.sysvec_apic_timer_interrupt.asm_sysvec_apic_timer_interrupt 0.00 +0.9 0.90 ± 24% perf-profile.calltrace.cycles-pp.xas_find.xa_find_after.btrfs_uninhibit_all_eb_writeback.__btrfs_end_transaction.btrfs_finish_one_ordered 0.00 +1.0 0.96 ± 24% perf-profile.calltrace.cycles-pp.xa_find_after.btrfs_uninhibit_all_eb_writeback.__btrfs_end_transaction.btrfs_finish_one_ordered.btrfs_work_helper 0.00 +2.1 2.14 ± 25% perf-profile.calltrace.cycles-pp.btrfs_uninhibit_all_eb_writeback.__btrfs_end_transaction.btrfs_finish_one_ordered.btrfs_work_helper.process_one_work 0.00 +2.2 2.18 ± 25% perf-profile.calltrace.cycles-pp.__btrfs_end_transaction.btrfs_finish_one_ordered.btrfs_work_helper.process_one_work.worker_thread 4.36 ± 7% -0.9 3.49 ± 17% perf-profile.children.cycles-pp.btrfs_buffered_write 1.71 ± 33% -0.6 1.08 ± 33% perf-profile.children.cycles-pp.btrfs_unpin_extent_cache 0.51 ± 65% -0.3 0.23 ± 18% perf-profile.children.cycles-pp.folios_put_refs 0.41 ± 58% -0.2 0.20 ± 36% perf-profile.children.cycles-pp.extent_clear_unlock_delalloc 0.53 ± 12% -0.2 0.36 ± 19% perf-profile.children.cycles-pp.tick_nohz_idle_stop_tick 0.52 ± 12% -0.2 0.36 ± 19% perf-profile.children.cycles-pp.tick_nohz_stop_tick 0.38 ± 15% -0.1 0.24 ± 27% perf-profile.children.cycles-pp.hrtimer_start_range_ns 0.42 ± 20% -0.1 0.31 ± 25% perf-profile.children.cycles-pp.filemap_dirty_folio 0.30 ± 25% -0.1 0.20 ± 27% perf-profile.children.cycles-pp.lapic_next_deadline 0.25 ± 5% -0.1 0.16 ± 18% perf-profile.children.cycles-pp.bio_alloc_bioset 0.27 ± 12% -0.1 0.18 ± 22% perf-profile.children.cycles-pp.btrfs_bio_alloc 0.32 ± 18% -0.1 0.24 ± 20% perf-profile.children.cycles-pp.llist_reverse_order 0.28 ± 23% -0.1 0.21 ± 27% perf-profile.children.cycles-pp.unlock_up 0.02 ±141% +0.1 0.08 ± 25% perf-profile.children.cycles-pp.rcu_cblist_dequeue 0.56 ± 4% +0.1 0.64 ± 12% perf-profile.children.cycles-pp.dequeue_entities 0.38 ± 17% +0.1 0.48 ± 12% perf-profile.children.cycles-pp.update_load_avg 0.09 ±106% +0.2 0.24 ± 30% perf-profile.children.cycles-pp.radix_tree_node_rcu_free 0.07 ± 71% +0.2 0.23 ± 48% perf-profile.children.cycles-pp.xa_find 2.18 ± 6% +0.3 2.47 ± 8% perf-profile.children.cycles-pp.its_return_thunk 0.87 ± 14% +0.3 1.17 ± 12% perf-profile.children.cycles-pp.btrfs_cross_ref_exist 0.70 ± 18% +0.4 1.10 ± 13% perf-profile.children.cycles-pp.kmem_cache_free 0.03 ±158% +0.4 0.43 ± 13% perf-profile.children.cycles-pp.__xa_store 0.03 ±158% +0.5 0.52 ± 15% perf-profile.children.cycles-pp.xa_store 2.24 ± 9% +0.5 2.75 ± 6% perf-profile.children.cycles-pp.__irq_exit_rcu 2.08 ± 10% +0.6 2.63 ± 7% perf-profile.children.cycles-pp.handle_softirqs 0.47 ± 32% +0.6 1.06 ± 17% perf-profile.children.cycles-pp.rcu_do_batch 0.59 ± 25% +0.6 1.22 ± 11% perf-profile.children.cycles-pp.rcu_core 7.26 ± 2% +0.7 7.97 ± 4% perf-profile.children.cycles-pp.asm_sysvec_apic_timer_interrupt 0.00 +0.7 0.73 ± 12% perf-profile.children.cycles-pp.btrfs_inhibit_eb_writeback 0.00 +0.8 0.76 ± 37% perf-profile.children.cycles-pp.xas_free_nodes 0.00 +0.8 0.79 ± 37% perf-profile.children.cycles-pp.xa_destroy 0.00 +1.0 0.97 ± 24% perf-profile.children.cycles-pp.xa_find_after 0.65 ± 9% +1.0 1.68 ± 20% perf-profile.children.cycles-pp.xas_find 0.00 +2.2 2.16 ± 24% perf-profile.children.cycles-pp.btrfs_uninhibit_all_eb_writeback 0.04 ± 73% +2.2 2.19 ± 24% perf-profile.children.cycles-pp.__btrfs_end_transaction 0.30 ± 26% -0.1 0.20 ± 25% perf-profile.self.cycles-pp.lapic_next_deadline 0.32 ± 18% -0.1 0.24 ± 20% perf-profile.self.cycles-pp.llist_reverse_order 0.09 ± 54% +0.1 0.18 ± 16% perf-profile.self.cycles-pp.xas_create 0.19 ± 25% +0.1 0.31 ± 14% perf-profile.self.cycles-pp.kick_pool 0.09 ±106% +0.1 0.24 ± 29% perf-profile.self.cycles-pp.radix_tree_node_rcu_free 0.09 ± 84% +0.2 0.28 ± 31% perf-profile.self.cycles-pp.__memcg_slab_free_hook 0.37 ± 14% +0.2 0.56 ± 13% perf-profile.self.cycles-pp.kmem_cache_free 0.00 +0.6 0.60 ± 38% perf-profile.self.cycles-pp.xas_free_nodes 0.02 ±141% +1.0 1.01 ± 28% perf-profile.self.cycles-pp.xas_find *************************************************************************************************** ========================================================================================= bs/compiler/cpufreq_governor/disk/fs/ioengine/kconfig/nr_task/rootfs/runtime/rw/tbox_group/test_size/testcase: 4k/gcc-14/performance/1HDD/btrfs/posixaio/x86_64-rhel-9.4/1/debian-13-x86_64-20250902.cgz/300s/randwrite/lkp-icl-2sp9/128G/fio-basic commit: 711f4cc50f ("btrfs: extract the max compression chunk size into a macro") aed9dfbe32 ("btrfs: inhibit extent buffer writeback to prevent COW amplification") 711f4cc50ffd7fb0 aed9dfbe32e50cd99a0022529d5 ---------------- --------------------------- %stddev %change %stddev \ | \ 0.51 ± 13% +0.7 1.17 ± 15% fio.latency_100ms% 25.06 +0.8 25.87 fio.latency_20ms% 0.58 ± 7% +0.6 1.20 ± 14% fio.latency_250ms% 1.53 +0.1 1.66 ± 2% fio.latency_500ms% 3825693 -8.1% 3515380 fio.time.file_system_outputs 684007 -5.8% 644492 fio.time.voluntary_context_switches 478211 -8.1% 439422 fio.workload 6.22 -8.2% 5.72 fio.write_bw_MBps 29185365 +5.8% 30889301 fio.write_clat_90%_ns 39671125 +11.2% 44127573 ± 2% fio.write_clat_95%_ns 20074679 +8.9% 21862659 fio.write_clat_mean_ns 57435038 +3.4% 59383937 fio.write_clat_stddev 1593 -8.2% 1463 fio.write_iops 1.66 +8.7% 1.80 iostat.cpu.iowait 0.99 +7.6% 1.06 turbostat.IPC 1.67 +0.1 1.81 mpstat.cpu.all.iowait% 0.01 ± 12% +0.0 0.01 ± 5% mpstat.cpu.all.soft% 0.15 +0.0 0.16 ± 3% mpstat.cpu.all.sys% 11874 +52.1% 18056 ± 7% vmstat.io.bo 4263635 +5.0% 4477347 vmstat.memory.cache 1.07 +8.1% 1.15 vmstat.procs.b 12308 -3.8% 11847 vmstat.system.cs 10620 -1.3% 10481 vmstat.system.in 1.534e+08 ± 4% +13.1% 1.734e+08 ± 4% perf-stat.i.branch-instructions 12.94 ± 6% +2.2 15.11 ± 7% perf-stat.i.cache-miss-rate% 497236 ± 7% +22.8% 610681 ± 8% perf-stat.i.cache-misses 3927589 ± 2% +7.1% 4207861 ± 2% perf-stat.i.cache-references 12366 -3.8% 11896 perf-stat.i.context-switches 1.03 -9.4% 0.93 perf-stat.i.cpi 8.092e+08 ± 4% +13.5% 9.186e+08 ± 4% perf-stat.i.instructions 1.06 +12.8% 1.20 perf-stat.i.ipc 12.65 ± 7% +1.8 14.49 ± 6% perf-stat.overall.cache-miss-rate% 1.07 -7.3% 1.00 perf-stat.overall.cpi 1759 ± 8% -14.5% 1504 ± 3% perf-stat.overall.cycles-between-cache-misses 0.93 +7.9% 1.00 perf-stat.overall.ipc 509423 ± 4% +23.7% 630234 ± 5% perf-stat.overall.path-length 1.53e+08 ± 4% +13.1% 1.73e+08 ± 4% perf-stat.ps.branch-instructions 495683 ± 7% +22.8% 608750 ± 8% perf-stat.ps.cache-misses 3918083 ± 2% +7.1% 4196905 ± 2% perf-stat.ps.cache-references 12326 -3.8% 11857 perf-stat.ps.context-switches 8.07e+08 ± 4% +13.5% 9.161e+08 ± 4% perf-stat.ps.instructions 2.436e+11 ± 4% +13.6% 2.768e+11 ± 4% perf-stat.total.instructions 8.49 ± 3% -3.1 5.37 ± 23% perf-profile.calltrace.cycles-pp.btree_csum_one_bio.btrfs_submit_chunk.btrfs_submit_bbio.btree_writepages.do_writepages 7.73 ± 3% -2.8 4.96 ± 23% perf-profile.calltrace.cycles-pp.btrfs_check_leaf.btree_csum_one_bio.btrfs_submit_chunk.btrfs_submit_bbio.btree_writepages 7.47 ± 3% -2.6 4.82 ± 23% perf-profile.calltrace.cycles-pp.__btrfs_check_leaf.btrfs_check_leaf.btree_csum_one_bio.btrfs_submit_chunk.btrfs_submit_bbio 4.57 ± 3% -1.3 3.23 ± 19% perf-profile.calltrace.cycles-pp.check_leaf_item.__btrfs_check_leaf.btrfs_check_leaf.btree_csum_one_bio.btrfs_submit_chunk 1.37 ± 22% -0.7 0.70 ± 57% perf-profile.calltrace.cycles-pp.btrfs_get_32.__btrfs_check_leaf.btrfs_check_leaf.btree_csum_one_bio.btrfs_submit_chunk 1.01 ± 22% -0.5 0.48 ± 73% perf-profile.calltrace.cycles-pp.end_bbio_meta_write.orig_write_end_io_work.process_one_work.worker_thread.kthread 1.12 ± 21% -0.5 0.62 ± 49% perf-profile.calltrace.cycles-pp.orig_write_end_io_work.process_one_work.worker_thread.kthread.ret_from_fork 1.50 ± 9% -0.5 1.00 ± 23% perf-profile.calltrace.cycles-pp.alloc_reserved_extent.alloc_reserved_tree_block.run_delayed_tree_ref.run_one_delayed_ref.btrfs_run_delayed_refs_for_head 0.88 ± 22% -0.5 0.39 ± 73% perf-profile.calltrace.cycles-pp.folio_end_writeback_no_dropbehind.folio_end_writeback.end_bbio_meta_write.orig_write_end_io_work.process_one_work 0.92 ± 21% -0.5 0.43 ± 73% perf-profile.calltrace.cycles-pp.folio_end_writeback.end_bbio_meta_write.orig_write_end_io_work.process_one_work.worker_thread 1.47 ± 10% -0.5 0.99 ± 24% perf-profile.calltrace.cycles-pp.btrfs_remove_from_free_space_tree.alloc_reserved_extent.alloc_reserved_tree_block.run_delayed_tree_ref.run_one_delayed_ref 0.86 ± 22% -0.5 0.39 ± 73% perf-profile.calltrace.cycles-pp.__folio_end_writeback.folio_end_writeback_no_dropbehind.folio_end_writeback.end_bbio_meta_write.orig_write_end_io_work 1.44 ± 11% -0.5 0.97 ± 23% perf-profile.calltrace.cycles-pp.remove_free_space_extent.btrfs_remove_from_free_space_tree.alloc_reserved_extent.alloc_reserved_tree_block.run_delayed_tree_ref 1.00 ± 12% -0.2 0.79 ± 8% perf-profile.calltrace.cycles-pp.__folio_end_writeback.folio_end_writeback_no_dropbehind.folio_end_writeback.end_bbio_data_write.btrfs_bio_end_io 0.72 ± 9% +0.2 0.94 ± 6% perf-profile.calltrace.cycles-pp.__push_leaf_right.push_leaf_right.split_leaf.setup_leaf_for_split.btrfs_duplicate_item 1.24 ± 7% +0.3 1.56 ± 12% perf-profile.calltrace.cycles-pp.push_leaf_right.split_leaf.setup_leaf_for_split.btrfs_duplicate_item.btrfs_mark_extent_written 1.88 ± 8% +0.4 2.31 ± 5% perf-profile.calltrace.cycles-pp.setup_leaf_for_split.btrfs_duplicate_item.btrfs_mark_extent_written.btrfs_finish_one_ordered.btrfs_work_helper 1.55 ± 8% +0.4 1.99 ± 9% perf-profile.calltrace.cycles-pp.split_leaf.setup_leaf_for_split.btrfs_duplicate_item.btrfs_mark_extent_written.btrfs_finish_one_ordered 6.98 ± 3% +0.6 7.58 ± 4% perf-profile.calltrace.cycles-pp.btrfs_duplicate_item.btrfs_mark_extent_written.btrfs_finish_one_ordered.btrfs_work_helper.process_one_work 0.00 +0.8 0.76 ± 21% perf-profile.calltrace.cycles-pp.kmem_cache_free.rcu_do_batch.rcu_core.handle_softirqs.__irq_exit_rcu 0.00 +0.8 0.79 ± 25% perf-profile.calltrace.cycles-pp.xa_destroy.btrfs_uninhibit_all_eb_writeback.__btrfs_end_transaction.btrfs_finish_one_ordered.btrfs_work_helper 1.09 ± 18% +0.8 1.88 ± 9% perf-profile.calltrace.cycles-pp.handle_softirqs.__irq_exit_rcu.sysvec_apic_timer_interrupt.asm_sysvec_apic_timer_interrupt.pv_native_safe_halt 1.13 ± 19% +0.8 1.94 ± 9% perf-profile.calltrace.cycles-pp.__irq_exit_rcu.sysvec_apic_timer_interrupt.asm_sysvec_apic_timer_interrupt.pv_native_safe_halt.acpi_safe_halt 0.33 ±100% +0.9 1.24 ± 14% perf-profile.calltrace.cycles-pp.rcu_core.handle_softirqs.__irq_exit_rcu.sysvec_apic_timer_interrupt.asm_sysvec_apic_timer_interrupt 0.18 ±141% +0.9 1.09 ± 18% perf-profile.calltrace.cycles-pp.rcu_do_batch.rcu_core.handle_softirqs.__irq_exit_rcu.sysvec_apic_timer_interrupt 0.00 +1.0 0.96 ± 8% perf-profile.calltrace.cycles-pp.xas_find.xa_find_after.btrfs_uninhibit_all_eb_writeback.__btrfs_end_transaction.btrfs_finish_one_ordered 10.80 ± 2% +1.0 11.78 ± 4% perf-profile.calltrace.cycles-pp.btrfs_mark_extent_written.btrfs_finish_one_ordered.btrfs_work_helper.process_one_work.worker_thread 0.00 +1.0 1.02 ± 7% perf-profile.calltrace.cycles-pp.xa_find_after.btrfs_uninhibit_all_eb_writeback.__btrfs_end_transaction.btrfs_finish_one_ordered.btrfs_work_helper 0.00 +2.2 2.17 ± 12% perf-profile.calltrace.cycles-pp.btrfs_uninhibit_all_eb_writeback.__btrfs_end_transaction.btrfs_finish_one_ordered.btrfs_work_helper.process_one_work 0.00 +2.3 2.25 ± 13% perf-profile.calltrace.cycles-pp.__btrfs_end_transaction.btrfs_finish_one_ordered.btrfs_work_helper.process_one_work.worker_thread 19.60 +3.7 23.33 ± 3% perf-profile.calltrace.cycles-pp.btrfs_work_helper.process_one_work.worker_thread.kthread.ret_from_fork 19.58 +3.7 23.32 ± 3% perf-profile.calltrace.cycles-pp.btrfs_finish_one_ordered.btrfs_work_helper.process_one_work.worker_thread.kthread 9.88 ± 3% -3.6 6.30 ± 22% perf-profile.children.cycles-pp.btree_writepages 11.98 ± 4% -3.5 8.51 ± 15% perf-profile.children.cycles-pp.btrfs_submit_chunk 11.99 ± 4% -3.5 8.54 ± 15% perf-profile.children.cycles-pp.btrfs_submit_bbio 20.26 -3.2 17.04 ± 5% perf-profile.children.cycles-pp.do_writepages 8.49 ± 3% -3.1 5.40 ± 23% perf-profile.children.cycles-pp.btree_csum_one_bio 7.73 ± 3% -2.8 4.98 ± 23% perf-profile.children.cycles-pp.__btrfs_check_leaf 7.73 ± 3% -2.8 4.98 ± 23% perf-profile.children.cycles-pp.btrfs_check_leaf 4.68 ± 2% -1.4 3.31 ± 19% perf-profile.children.cycles-pp.check_leaf_item 2.91 ± 6% -0.8 2.07 ± 23% perf-profile.children.cycles-pp.alloc_reserved_tree_block 2.91 ± 6% -0.8 2.07 ± 23% perf-profile.children.cycles-pp.run_delayed_tree_ref 2.38 ± 8% -0.6 1.81 ± 11% perf-profile.children.cycles-pp.folio_end_writeback 2.32 ± 8% -0.6 1.76 ± 11% perf-profile.children.cycles-pp.folio_end_writeback_no_dropbehind 1.67 ± 7% -0.6 1.11 ± 22% perf-profile.children.cycles-pp.alloc_reserved_extent 1.88 ± 12% -0.5 1.33 ± 10% perf-profile.children.cycles-pp.__folio_end_writeback 1.63 ± 7% -0.5 1.10 ± 21% perf-profile.children.cycles-pp.btrfs_remove_from_free_space_tree 1.60 ± 8% -0.5 1.07 ± 20% perf-profile.children.cycles-pp.remove_free_space_extent 1.06 ± 34% -0.5 0.60 ± 20% perf-profile.children.cycles-pp.crc32c_arch 1.06 ± 34% -0.5 0.60 ± 21% perf-profile.children.cycles-pp.btrfs_csum_update 0.99 ± 36% -0.4 0.56 ± 22% perf-profile.children.cycles-pp.crc32c_x86_3way 1.12 ± 21% -0.4 0.70 ± 21% perf-profile.children.cycles-pp.orig_write_end_io_work 1.01 ± 22% -0.4 0.63 ± 26% perf-profile.children.cycles-pp.end_bbio_meta_write 0.69 ± 20% -0.3 0.40 ± 35% perf-profile.children.cycles-pp.csum_tree_block 1.74 ± 12% -0.3 1.48 ± 2% perf-profile.children.cycles-pp._raw_spin_lock_irqsave 0.50 ± 19% -0.2 0.28 ± 30% perf-profile.children.cycles-pp.btrfs_comp_cpu_keys 0.50 ± 22% -0.2 0.31 ± 24% perf-profile.children.cycles-pp.btrfs_submit_bio 0.32 ± 27% -0.1 0.18 ± 49% perf-profile.children.cycles-pp.__rq_qos_throttle 0.35 ± 19% -0.1 0.26 ± 25% perf-profile.children.cycles-pp.rcu_gp_fqs_loop 0.13 ± 24% -0.0 0.08 ± 22% perf-profile.children.cycles-pp.blk_mq_free_request 0.08 ± 56% +0.1 0.15 ± 17% perf-profile.children.cycles-pp.rwsem_down_read_slowpath 0.05 ± 52% +0.1 0.15 ± 50% perf-profile.children.cycles-pp.lru_gen_add_folio 0.22 ± 25% +0.1 0.33 ± 19% perf-profile.children.cycles-pp.__push_leaf_left 0.12 ± 29% +0.1 0.23 ± 31% perf-profile.children.cycles-pp.radix_tree_node_rcu_free 0.16 ± 29% +0.1 0.29 ± 14% perf-profile.children.cycles-pp.refill_objects 0.08 ± 62% +0.2 0.23 ± 24% perf-profile.children.cycles-pp.__refill_objects_node 0.24 ± 20% +0.2 0.40 ± 23% perf-profile.children.cycles-pp.__pcs_replace_empty_main 0.06 ± 48% +0.2 0.23 ± 21% perf-profile.children.cycles-pp.xa_find 0.33 ± 12% +0.2 0.58 ± 14% perf-profile.children.cycles-pp.xas_alloc 0.11 ± 24% +0.3 0.39 ± 20% perf-profile.children.cycles-pp.__memcg_slab_free_hook 0.88 ± 14% +0.3 1.16 ± 9% perf-profile.children.cycles-pp.xas_store 0.40 ± 21% +0.4 0.79 ± 9% perf-profile.children.cycles-pp.xas_create 1.88 ± 8% +0.4 2.31 ± 5% perf-profile.children.cycles-pp.setup_leaf_for_split 0.04 ± 47% +0.4 0.48 ± 11% perf-profile.children.cycles-pp.__xa_store 0.76 ± 12% +0.4 1.21 ± 19% perf-profile.children.cycles-pp.kmem_cache_free 0.06 ± 51% +0.5 0.52 ± 11% perf-profile.children.cycles-pp.xa_store 6.98 ± 3% +0.6 7.58 ± 4% perf-profile.children.cycles-pp.btrfs_duplicate_item 0.52 ± 10% +0.7 1.20 ± 16% perf-profile.children.cycles-pp.rcu_do_batch 0.62 ± 15% +0.7 1.34 ± 14% perf-profile.children.cycles-pp.rcu_core 0.00 +0.7 0.75 ± 26% perf-profile.children.cycles-pp.xas_free_nodes 0.00 +0.8 0.77 ± 8% perf-profile.children.cycles-pp.btrfs_inhibit_eb_writeback 0.00 +0.8 0.79 ± 25% perf-profile.children.cycles-pp.xa_destroy 2.22 ± 13% +1.0 3.19 ± 9% perf-profile.children.cycles-pp.__irq_exit_rcu 2.03 ± 12% +1.0 3.00 ± 10% perf-profile.children.cycles-pp.handle_softirqs 10.82 ± 2% +1.0 11.81 ± 4% perf-profile.children.cycles-pp.btrfs_mark_extent_written 0.00 +1.0 1.02 ± 8% perf-profile.children.cycles-pp.xa_find_after 0.59 ± 11% +1.2 1.80 ± 9% perf-profile.children.cycles-pp.xas_find 0.00 +2.2 2.17 ± 12% perf-profile.children.cycles-pp.btrfs_uninhibit_all_eb_writeback 0.01 ±223% +2.2 2.25 ± 13% perf-profile.children.cycles-pp.__btrfs_end_transaction 19.60 +3.7 23.33 ± 3% perf-profile.children.cycles-pp.btrfs_work_helper 19.59 +3.7 23.33 ± 3% perf-profile.children.cycles-pp.btrfs_finish_one_ordered 0.70 ± 21% -0.3 0.37 ± 28% perf-profile.self.cycles-pp.__btrfs_check_leaf 0.84 ± 13% -0.3 0.56 ± 22% perf-profile.self.cycles-pp.crc32c_x86_3way 0.46 ± 34% -0.3 0.21 ± 46% perf-profile.self.cycles-pp.check_leaf_item 0.46 ± 18% -0.2 0.26 ± 32% perf-profile.self.cycles-pp.btrfs_comp_cpu_keys 0.05 ± 52% +0.1 0.12 ± 39% perf-profile.self.cycles-pp.xa_load 0.11 ± 26% +0.1 0.19 ± 25% perf-profile.self.cycles-pp.btrfs_clear_extent_bit_changeset 0.00 +0.1 0.10 ± 40% perf-profile.self.cycles-pp.btrfs_inhibit_eb_writeback 0.05 ±118% +0.1 0.17 ± 22% perf-profile.self.cycles-pp.xas_create 0.08 ± 62% +0.1 0.21 ± 23% perf-profile.self.cycles-pp.__refill_objects_node 0.02 ±223% +0.1 0.16 ± 34% perf-profile.self.cycles-pp.__call_rcu_common 0.03 ±102% +0.3 0.30 ± 21% perf-profile.self.cycles-pp.__memcg_slab_free_hook 0.00 +0.6 0.59 ± 25% perf-profile.self.cycles-pp.xas_free_nodes 0.02 ±144% +1.1 1.10 ± 8% perf-profile.self.cycles-pp.xas_find 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