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Qvfdb4WOd/M7cKRiq2Y7oYovjZ8xFnoGW6i65c4tUI8GYdWO2Vjy2z9lDGnKYWN8BraEIiwUoHOur8n6+58UVg== X-MS-Exchange-Transport-CrossTenantHeadersStamped: PH0PR11MB4791 X-OriginatorOrg: intel.com Hello, kernel test robot noticed a 186.4% regression of fsmark.app_overhead on: (but no diff for fsmark.files_per_sec as below (a)) commit: ab627262022ed8c6a68e619ed03a14e47acf2e39 ("nfsd: allocate new session-based DRC slots on demand.") https://git.kernel.org/cgit/linux/kernel/git/cel/linux nfsd-testing testcase: fsmark config: x86_64-rhel-9.4 compiler: gcc-12 test machine: 64 threads 2 sockets Intel(R) Xeon(R) Gold 6346 CPU @ 3.10GHz (Ice Lake) with 256G memory parameters: iterations: 1x nr_threads: 32t disk: 1HDD fs: btrfs fs2: nfsv4 filesize: 16MB test_size: 15G sync_method: NoSync nr_directories: 16d nr_files_per_directory: 256fpd cpufreq_governor: performance 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/202412271641.cfba5666-lkp@intel.com Details are as below: --------------------------------------------------------------------------------------------------> The kernel config and materials to reproduce are available at: https://download.01.org/0day-ci/archive/20241227/202412271641.cfba5666-lkp@intel.com ========================================================================================= compiler/cpufreq_governor/disk/filesize/fs2/fs/iterations/kconfig/nr_directories/nr_files_per_directory/nr_threads/rootfs/sync_method/tbox_group/test_size/testcase: gcc-12/performance/1HDD/16MB/nfsv4/btrfs/1x/x86_64-rhel-9.4/16d/256fpd/32t/debian-12-x86_64-20240206.cgz/NoSync/lkp-icl-2sp7/15G/fsmark commit: ccd01c7601 ("nfsd: add session slot count to /proc/fs/nfsd/clients/*/info") ab62726202 ("nfsd: allocate new session-based DRC slots on demand.") ccd01c76017847d1 ab627262022ed8c6a68e619ed03 ---------------- --------------------------- %stddev %change %stddev \ | \ 5.48 ± 9% +24.9% 6.85 ± 14% sched_debug.cpu.nr_uninterruptible.stddev 12489 +11.1% 13876 uptime.idle 3.393e+08 ± 16% +186.4% 9.717e+08 ± 9% fsmark.app_overhead 6.40 +0.0% 6.40 fsmark.files_per_sec <-------- (a) 6.00 +27.8% 7.67 ± 6% fsmark.time.percent_of_cpu_this_job_got 72.33 +15.8% 83.79 iostat.cpu.idle 25.91 ± 3% -44.3% 14.42 ± 11% iostat.cpu.iowait 72.08 +11.6 83.64 mpstat.cpu.all.idle% 26.18 ± 3% -11.6 14.58 ± 11% mpstat.cpu.all.iowait% 153772 ± 5% +19.1% 183126 ± 8% meminfo.DirectMap4k 156099 +19.5% 186594 meminfo.Dirty 467358 -12.9% 406910 ± 2% meminfo.Writeback 72.35 +15.8% 83.79 vmstat.cpu.id 25.90 ± 3% -44.3% 14.41 ± 11% vmstat.cpu.wa 17.61 ± 3% -45.8% 9.55 ± 10% vmstat.procs.b 5909 ± 2% -6.2% 5545 vmstat.system.in 0.03 ± 56% -73.4% 0.01 ±149% perf-sched.sch_delay.avg.ms.btrfs_commit_transaction.btrfs_sync_file.nfsd_commit.nfsd4_commit 0.05 ± 60% -72.1% 0.02 ±165% perf-sched.sch_delay.max.ms.btrfs_commit_transaction.btrfs_sync_file.nfsd_commit.nfsd4_commit 0.07 ± 41% +36.1% 0.10 ± 8% perf-sched.sch_delay.max.ms.schedule_preempt_disabled.rwsem_down_read_slowpath.down_read.btrfs_tree_read_lock_nested 13.03 ±170% +566.0% 86.78 ± 77% perf-sched.wait_and_delay.avg.ms.schedule_preempt_disabled.__mutex_lock.constprop.0.svc_tcp_sendto 206.83 ± 14% -31.5% 141.67 ± 6% perf-sched.wait_and_delay.count.rpc_wait_bit_killable.__wait_on_bit.out_of_line_wait_on_bit.__rpc_execute 0.30 ± 62% -82.1% 0.05 ±110% perf-sched.wait_time.avg.ms.handle_reserve_ticket.__reserve_bytes.btrfs_reserve_data_bytes.btrfs_check_data_free_space 7.37 ± 4% -15.8% 6.20 ± 4% perf-stat.i.MPKI 44.13 ± 2% -2.9 41.25 ± 2% perf-stat.i.cache-miss-rate% 103.65 ± 2% +17.9% 122.17 ± 8% perf-stat.i.cpu-migrations 627.67 ± 3% +25.4% 787.18 ± 6% perf-stat.i.cycles-between-cache-misses 0.67 +3.7% 0.70 perf-stat.i.ipc 1.35 +2.2% 1.38 perf-stat.overall.cpi 373.39 +4.1% 388.79 perf-stat.overall.cycles-between-cache-misses 0.74 -2.1% 0.73 perf-stat.overall.ipc 102.89 ± 2% +17.9% 121.32 ± 8% perf-stat.ps.cpu-migrations 39054 +19.0% 46460 ± 2% proc-vmstat.nr_dirty 15139 +2.2% 15476 proc-vmstat.nr_kernel_stack 45710 +1.9% 46570 proc-vmstat.nr_slab_unreclaimable 116900 -13.5% 101162 proc-vmstat.nr_writeback 87038 -18.2% 71185 ± 2% proc-vmstat.nr_zone_write_pending 6949807 -3.8% 6688660 proc-vmstat.numa_hit 6882153 -3.8% 6622312 proc-vmstat.numa_local 13471776 -2.0% 13204489 proc-vmstat.pgalloc_normal 584292 +3.8% 606391 ± 3% proc-vmstat.pgfault 25859 +9.8% 28392 ± 9% proc-vmstat.pgreuse 2.02 ± 8% -0.3 1.71 ± 5% perf-profile.calltrace.cycles-pp.asm_sysvec_apic_timer_interrupt.cpuidle_enter_state.cpuidle_enter.cpuidle_idle_call.do_idle 1.86 ± 8% -0.3 1.58 ± 6% perf-profile.calltrace.cycles-pp.sysvec_apic_timer_interrupt.asm_sysvec_apic_timer_interrupt.cpuidle_enter_state.cpuidle_enter.cpuidle_idle_call 3.42 ± 5% -0.6 2.87 ± 5% perf-profile.children.cycles-pp.asm_sysvec_apic_timer_interrupt 2.96 ± 4% -0.4 2.55 ± 5% perf-profile.children.cycles-pp.sysvec_apic_timer_interrupt 0.35 ± 45% -0.2 0.14 ± 71% perf-profile.children.cycles-pp.khugepaged 0.34 ± 46% -0.2 0.14 ± 71% perf-profile.children.cycles-pp.hpage_collapse_scan_pmd 0.34 ± 46% -0.2 0.14 ± 71% perf-profile.children.cycles-pp.khugepaged_scan_mm_slot 0.34 ± 47% -0.2 0.14 ± 72% perf-profile.children.cycles-pp.collapse_huge_page 1.21 ± 10% -0.2 1.01 ± 8% perf-profile.children.cycles-pp.__hrtimer_run_queues 0.82 ± 9% -0.1 0.68 ± 10% perf-profile.children.cycles-pp.update_process_times 0.41 ± 8% -0.1 0.29 ± 22% perf-profile.children.cycles-pp.btrfs_check_data_free_space 0.21 ± 7% -0.1 0.11 ± 73% perf-profile.children.cycles-pp.copy_mc_enhanced_fast_string 0.55 ± 11% -0.1 0.46 ± 14% perf-profile.children.cycles-pp.__set_extent_bit 0.33 ± 9% -0.1 0.28 ± 8% perf-profile.children.cycles-pp.nfs_request_add_commit_list 0.17 ± 9% -0.0 0.13 ± 16% perf-profile.children.cycles-pp.readn 0.08 ± 13% -0.0 0.06 ± 14% perf-profile.children.cycles-pp.load_elf_interp 1.00 ± 16% +1.2 2.18 ± 53% perf-profile.children.cycles-pp.folio_batch_move_lru 0.21 ± 8% -0.1 0.11 ± 73% perf-profile.self.cycles-pp.copy_mc_enhanced_fast_string 0.05 ± 49% +0.1 0.15 ± 61% perf-profile.self.cycles-pp.nfs_update_folio 0.94 ± 5% +0.2 1.11 ± 4% perf-profile.self.cycles-pp._raw_spin_lock_irqsave 0.25 ± 17% +0.4 0.63 ± 61% perf-profile.self.cycles-pp.nfs_page_async_flush 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