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Date: Wed, 13 Jan 2021 15:15:09 +0800
From: Qu Wenruo <quwenruo.btrfs@....com>
To: kernel test robot <oliver.sang@...el.com>, Qu Wenruo <wqu@...e.com>
Cc: 0day robot <lkp@...el.com>, LKML <linux-kernel@...r.kernel.org>,
lkp@...ts.01.org, ying.huang@...el.com, feng.tang@...el.com,
zhengjun.xing@...el.com, linux-btrfs@...r.kernel.org
Subject: Re: [btrfs] e86bb85b1f: stress-ng.utime.ops_per_sec -70.1% regression
On 2021/1/12 下午11:24, kernel test robot wrote:
>
> Greeting,
>
> FYI, we noticed a -70.1% regression of stress-ng.utime.ops_per_sec due to commit:
>
>
> commit: e86bb85b1fec48bcb8dfb79ec9f104d1a38fda78 ("[PATCH] btrfs: make btrfs_dirty_inode() to always reserve metadata space")
> url: https://github.com/0day-ci/linux/commits/Qu-Wenruo/btrfs-make-btrfs_dirty_inode-to-always-reserve-metadata-space/20210108-134133
> base: https://git.kernel.org/cgit/linux/kernel/git/kdave/linux.git for-next
>
> in testcase: stress-ng
> on test machine: 96 threads Intel(R) Xeon(R) Gold 6252 CPU @ 2.10GHz with 512G memory
> with following parameters:
>
> nr_threads: 10%
> disk: 1HDD
> testtime: 30s
> class: filesystem
> cpufreq_governor: performance
> ucode: 0x5003003
> fs: btrfs
>
>
>
>
> If you fix the issue, kindly add following tag
> Reported-by: kernel test robot <oliver.sang@...el.com>
>
>
> Details are as below:
> -------------------------------------------------------------------------------------------------->
>
>
> To reproduce:
>
> git clone https://github.com/intel/lkp-tests.git
> cd lkp-tests
> bin/lkp install job.yaml # job file is attached in this email
> bin/lkp run job.yaml
>
> =========================================================================================
> class/compiler/cpufreq_governor/disk/fs/kconfig/nr_threads/rootfs/tbox_group/testcase/testtime/ucode:
> filesystem/gcc-9/performance/1HDD/btrfs/x86_64-rhel-8.3/10%/debian-10.4-x86_64-20200603.cgz/lkp-csl-2sp7/stress-ng/30s/0x5003003
>
> commit:
> 97847e0652 ("Merge branch 'for-next-next-v5.10-20201211' into for-next-20201211")
> e86bb85b1f ("btrfs: make btrfs_dirty_inode() to always reserve metadata space")
>
> 97847e06525b51ea e86bb85b1fec48bcb8dfb79ec9f
> ---------------- ---------------------------
> %stddev %change %stddev
> \ | \
> 1098218 -40.4% 654054 stress-ng.access.ops
> 36607 -40.4% 21801 stress-ng.access.ops_per_sec
This is a little interesting.
Although accessing an inode will update its atime, but don't we have
lazy_atime mount option?
> 92962 ± 2% -44.1% 51992 ± 3% stress-ng.chmod.ops
> 3098 ± 2% -44.1% 1733 ± 3% stress-ng.chmod.ops_per_sec
> 936128 ± 6% -41.0% 552284 stress-ng.chown.ops
> 31204 ± 6% -41.0% 18409 stress-ng.chown.ops_per_sec
> 1939514 -18.5% 1580533 stress-ng.fcntl.ops
> 64650 -18.5% 52684 stress-ng.fcntl.ops_per_sec
> 3705607 ± 2% -70.1% 1109769 stress-ng.utime.ops
> 123519 ± 2% -70.1% 36992 stress-ng.utime.ops_per_sec
Another interesting part is, only stress-ng is reporting such
regressioin on the commit?
No other report on the commit with different test env? E.g. NVME SSD?
Above operations is affected by such commit, but I'm a little surprised
only one report here.
Just because flushing on HDD is more expensive? If no other test suite
is fine, I would prefer to accept the drop, as it really streamline the
operations.
Thanks,
Qu
> 381.20 ± 6% +12.3% 428.27 ± 9% sched_debug.cfs_rq:/.load_avg.avg
> 6316 ± 57% -79.8% 1278 ± 68% softirqs.CPU77.BLOCK
> 10488 ±101% -89.5% 1100 ±124% softirqs.CPU78.BLOCK
> 5605 ± 92% -82.3% 990.50 ± 32% softirqs.CPU80.BLOCK
> 6094 ±128% -89.9% 614.50 ± 44% softirqs.CPU92.BLOCK
> 4921 ± 9% +20.5% 5931 ± 5% slabinfo.dmaengine-unmap-16.active_objs
> 4922 ± 9% +20.5% 5933 ± 5% slabinfo.dmaengine-unmap-16.num_objs
> 9818 ± 5% -6.9% 9139 ± 3% slabinfo.kmalloc-rcl-256.active_objs
> 49223 ± 3% -18.4% 40177 ± 3% slabinfo.radix_tree_node.active_objs
> 903.25 ± 3% -18.0% 740.50 ± 3% slabinfo.radix_tree_node.active_slabs
> 50620 ± 3% -18.0% 41505 ± 3% slabinfo.radix_tree_node.num_objs
> 903.25 ± 3% -18.0% 740.50 ± 3% slabinfo.radix_tree_node.num_slabs
> 9927 ± 3% +5.8% 10504 proc-vmstat.nr_active_anon
> 6043459 ± 2% -2.2% 5911900 proc-vmstat.nr_dirtied
> 1125 -6.1% 1056 ± 4% proc-vmstat.nr_dirty
> 20361 ± 2% +4.7% 21309 proc-vmstat.nr_shmem
> 66221 -4.3% 63404 ± 2% proc-vmstat.nr_slab_reclaimable
> 9927 ± 3% +5.8% 10504 proc-vmstat.nr_zone_active_anon
> 1225 -5.8% 1154 ± 3% proc-vmstat.nr_zone_write_pending
> 11313111 -2.1% 11072335 proc-vmstat.pgfault
> 0.00 +125.0% 0.00 ± 19% perf-sched.sch_delay.avg.ms.preempt_schedule_common._cond_resched.kmem_cache_alloc.start_transaction.btrfs_dirty_inode
> 0.01 ± 13% -24.5% 0.01 ± 15% perf-sched.sch_delay.max.ms.do_wait.kernel_wait4.__do_sys_wait4.do_syscall_64
> 3.26 ± 41% -98.8% 0.04 perf-sched.sch_delay.max.ms.rwsem_down_write_slowpath.chmod_common.do_fchmodat.__x64_sys_chmod
> 0.00 ± 50% +123.5% 0.01 ± 24% perf-sched.sch_delay.max.ms.wait_for_partner.fifo_open.do_dentry_open.path_openat
> 4.77 ± 6% -25.7% 3.54 perf-sched.total_sch_delay.max.ms
> 0.02 ± 7% +19.5% 0.02 ± 5% perf-sched.wait_and_delay.avg.ms.rwsem_down_write_slowpath.chmod_common.do_fchmodat.__x64_sys_fchmodat
> 1711 ± 27% +60.7% 2750 ± 22% perf-sched.wait_and_delay.count.rwsem_down_write_slowpath.chmod_common.__x64_sys_fchmod.do_syscall_64
> 0.03 ±132% +2497.6% 0.81 ± 66% perf-sched.wait_time.avg.ms.preempt_schedule_common._cond_resched.dput.path_put.do_fchmodat
> 0.25 ± 67% +243.4% 0.86 ± 49% perf-sched.wait_time.avg.ms.preempt_schedule_common._cond_resched.kmem_cache_alloc.start_transaction.btrfs_dirty_inode
> 0.02 ± 11% +28.6% 0.02 ± 13% perf-sched.wait_time.avg.ms.rwsem_down_write_slowpath.chmod_common.do_fchmodat.__x64_sys_chmod
> 0.27 ±160% +1248.5% 3.67 ± 57% perf-sched.wait_time.max.ms.preempt_schedule_common._cond_resched.dput.path_put.do_fchmodat
> 0.04 ±165% +4851.4% 2.17 ± 99% perf-sched.wait_time.max.ms.preempt_schedule_common._cond_resched.mnt_want_write.chmod_common.do_fchmodat
> 36969238 -5.8% 34829162 ± 2% perf-stat.i.cache-misses
> 2.009e+09 -2.7% 1.954e+09 perf-stat.i.dTLB-stores
> 12297175 ± 2% -6.5% 11500340 perf-stat.i.iTLB-load-misses
> 1843 +7.0% 1972 ± 2% perf-stat.i.instructions-per-iTLB-miss
> 8936 -2.2% 8740 perf-stat.i.minor-faults
> 952962 -3.6% 919068 perf-stat.i.node-loads
> 5348157 -7.4% 4950006 ± 2% perf-stat.i.node-store-misses
> 8942 -2.2% 8748 perf-stat.i.page-faults
> 0.00 ± 20% +0.0 0.00 ± 18% perf-stat.overall.dTLB-store-miss-rate%
> 1263 +6.1% 1339 perf-stat.overall.instructions-per-iTLB-miss
> 36924576 -5.8% 34784593 ± 2% perf-stat.ps.cache-misses
> 2.003e+09 -2.7% 1.949e+09 perf-stat.ps.dTLB-stores
> 12274047 ± 2% -6.5% 11479296 perf-stat.ps.iTLB-load-misses
> 8880 -2.1% 8694 perf-stat.ps.minor-faults
> 950813 -3.6% 916929 perf-stat.ps.node-loads
> 5343222 -7.5% 4944422 ± 2% perf-stat.ps.node-store-misses
> 8887 -2.1% 8702 perf-stat.ps.page-faults
> 57.00 ±166% -100.0% 0.00 interrupts.92:PCI-MSI.31981625-edge.i40e-eth0-TxRx-56
> 19339 ± 7% +31.3% 25385 ± 16% interrupts.CPU13.CAL:Function_call_interrupts
> 19917 ± 5% +9.7% 21856 interrupts.CPU23.TLB:TLB_shootdowns
> 20940 ± 5% +9.5% 22935 ± 4% interrupts.CPU29.CAL:Function_call_interrupts
> 3470 ± 65% -96.1% 136.75 ± 5% interrupts.CPU29.NMI:Non-maskable_interrupts
> 3470 ± 65% -96.1% 136.75 ± 5% interrupts.CPU29.PMI:Performance_monitoring_interrupts
> 2061 ±160% -93.5% 134.00 ± 3% interrupts.CPU33.NMI:Non-maskable_interrupts
> 2061 ±160% -93.5% 134.00 ± 3% interrupts.CPU33.PMI:Performance_monitoring_interrupts
> 3041 ± 47% +75.6% 5342 ± 36% interrupts.CPU35.RES:Rescheduling_interrupts
> 3748 ± 96% -96.5% 133.00 ± 5% interrupts.CPU40.NMI:Non-maskable_interrupts
> 3748 ± 96% -96.5% 133.00 ± 5% interrupts.CPU40.PMI:Performance_monitoring_interrupts
> 21172 ± 5% -12.7% 18476 ± 6% interrupts.CPU45.CAL:Function_call_interrupts
> 56.25 ±169% -100.0% 0.00 interrupts.CPU56.92:PCI-MSI.31981625-edge.i40e-eth0-TxRx-56
> 122.50 ± 25% -34.5% 80.25 ± 32% interrupts.CPU56.NMI:Non-maskable_interrupts
> 122.50 ± 25% -34.5% 80.25 ± 32% interrupts.CPU56.PMI:Performance_monitoring_interrupts
> 21585 ± 5% +13.4% 24479 ± 5% interrupts.CPU58.TLB:TLB_shootdowns
> 3340 ± 22% +76.3% 5888 ± 48% interrupts.CPU62.RES:Rescheduling_interrupts
> 23969 ± 5% +12.5% 26976 ± 14% interrupts.CPU66.CAL:Function_call_interrupts
> 22832 ± 5% +26.5% 28873 ± 14% interrupts.CPU69.CAL:Function_call_interrupts
> 2329 ±106% -66.3% 784.50 ±150% interrupts.CPU73.NMI:Non-maskable_interrupts
> 2329 ±106% -66.3% 784.50 ±150% interrupts.CPU73.PMI:Performance_monitoring_interrupts
> 3520 ± 65% -96.7% 116.00 ± 27% interrupts.CPU77.NMI:Non-maskable_interrupts
> 3520 ± 65% -96.7% 116.00 ± 27% interrupts.CPU77.PMI:Performance_monitoring_interrupts
> 1570 ±156% -93.6% 101.00 ± 37% interrupts.CPU81.NMI:Non-maskable_interrupts
> 1570 ±156% -93.6% 101.00 ± 37% interrupts.CPU81.PMI:Performance_monitoring_interrupts
> 2501 ±109% -95.9% 102.75 ± 41% interrupts.CPU88.NMI:Non-maskable_interrupts
> 2501 ±109% -95.9% 102.75 ± 41% interrupts.CPU88.PMI:Performance_monitoring_interrupts
> 5208 ± 44% -48.6% 2674 ± 46% interrupts.CPU9.RES:Rescheduling_interrupts
> 20273 ± 10% +22.3% 24803 ± 11% interrupts.CPU91.CAL:Function_call_interrupts
> 1833 ±158% -93.6% 117.75 ± 24% interrupts.CPU94.NMI:Non-maskable_interrupts
> 1833 ±158% -93.6% 117.75 ± 24% interrupts.CPU94.PMI:Performance_monitoring_interrupts
> 47.69 ± 11% -27.3 20.39 ± 3% perf-profile.calltrace.cycles-pp.do_faccessat.do_syscall_64.entry_SYSCALL_64_after_hwframe
> 20.56 ± 11% -12.1 8.50 ± 3% perf-profile.calltrace.cycles-pp.prepare_creds.do_faccessat.do_syscall_64.entry_SYSCALL_64_after_hwframe
> 18.78 ± 11% -11.9 6.92 ± 3% perf-profile.calltrace.cycles-pp.put_cred_rcu.do_faccessat.do_syscall_64.entry_SYSCALL_64_after_hwframe
> 5.42 ± 12% -3.8 1.60 ± 3% perf-profile.calltrace.cycles-pp.free_uid.put_cred_rcu.do_faccessat.do_syscall_64.entry_SYSCALL_64_after_hwframe
> 5.38 ± 12% -3.8 1.57 ± 3% perf-profile.calltrace.cycles-pp.refcount_dec_and_lock_irqsave.free_uid.put_cred_rcu.do_faccessat.do_syscall_64
> 5.36 ± 12% -3.8 1.56 ± 3% perf-profile.calltrace.cycles-pp.refcount_dec_not_one.refcount_dec_and_lock_irqsave.free_uid.put_cred_rcu.do_faccessat
> 5.32 ± 11% -3.1 2.19 ± 3% perf-profile.calltrace.cycles-pp.key_put.put_cred_rcu.do_faccessat.do_syscall_64.entry_SYSCALL_64_after_hwframe
> 5.17 ± 11% -2.4 2.74 ± 4% perf-profile.calltrace.cycles-pp.security_prepare_creds.prepare_creds.do_faccessat.do_syscall_64.entry_SYSCALL_64_after_hwframe
> 4.77 ± 8% -2.3 2.50 ± 4% perf-profile.calltrace.cycles-pp.btrfs_update_inode.btrfs_dirty_inode.btrfs_setattr.notify_change.chmod_common
> 3.79 ± 7% -2.0 1.84 ± 4% perf-profile.calltrace.cycles-pp.btrfs_delayed_update_inode.btrfs_update_inode.btrfs_dirty_inode.btrfs_setattr.notify_change
> 3.54 ± 12% -1.8 1.74 ± 4% perf-profile.calltrace.cycles-pp.apparmor_cred_prepare.security_prepare_creds.prepare_creds.do_faccessat.do_syscall_64
> 3.49 ± 9% -1.8 1.72 ± 6% perf-profile.calltrace.cycles-pp.security_cred_free.put_cred_rcu.do_faccessat.do_syscall_64.entry_SYSCALL_64_after_hwframe
> 2.49 ± 9% -1.4 1.08 ± 8% perf-profile.calltrace.cycles-pp.apparmor_cred_free.security_cred_free.put_cred_rcu.do_faccessat.do_syscall_64
> 3.38 ± 11% -1.3 2.04 ± 6% perf-profile.calltrace.cycles-pp.filename_lookup.do_faccessat.do_syscall_64.entry_SYSCALL_64_after_hwframe
> 3.25 ± 11% -1.3 1.96 ± 3% perf-profile.calltrace.cycles-pp.__do_sys_newfstatat.do_syscall_64.entry_SYSCALL_64_after_hwframe
> 2.99 ± 11% -1.2 1.82 ± 6% perf-profile.calltrace.cycles-pp.path_lookupat.filename_lookup.do_faccessat.do_syscall_64.entry_SYSCALL_64_after_hwframe
> 1.55 ± 11% -1.2 0.39 ± 57% perf-profile.calltrace.cycles-pp.join_transaction.start_transaction.btrfs_dirty_inode.btrfs_setattr.notify_change
> 2.89 ± 10% -1.1 1.75 ± 3% perf-profile.calltrace.cycles-pp.vfs_statx.__do_sys_newfstatat.do_syscall_64.entry_SYSCALL_64_after_hwframe
> 2.46 ± 7% -1.1 1.33 ± 2% perf-profile.calltrace.cycles-pp.__btrfs_release_delayed_node.btrfs_delayed_update_inode.btrfs_update_inode.btrfs_dirty_inode.btrfs_setattr
> 1.79 ± 11% -0.7 1.11 ± 6% perf-profile.calltrace.cycles-pp.link_path_walk.path_lookupat.filename_lookup.do_faccessat.do_syscall_64
> 1.57 ± 11% -0.7 0.91 ± 3% perf-profile.calltrace.cycles-pp.kmem_cache_alloc.prepare_creds.do_faccessat.do_syscall_64.entry_SYSCALL_64_after_hwframe
> 1.64 ± 9% -0.6 1.00 ± 4% perf-profile.calltrace.cycles-pp.user_path_at_empty.do_faccessat.do_syscall_64.entry_SYSCALL_64_after_hwframe
> 1.60 ± 9% -0.6 0.98 ± 4% perf-profile.calltrace.cycles-pp.getname_flags.user_path_at_empty.do_faccessat.do_syscall_64.entry_SYSCALL_64_after_hwframe
> 1.54 ± 8% -0.6 0.94 ± 3% perf-profile.calltrace.cycles-pp.__kmalloc.security_prepare_creds.prepare_creds.do_faccessat.do_syscall_64
> 1.21 ± 10% -0.4 0.77 ± 5% perf-profile.calltrace.cycles-pp.strncpy_from_user.getname_flags.user_path_at_empty.do_faccessat.do_syscall_64
> 1.00 ± 10% -0.4 0.63 ± 3% perf-profile.calltrace.cycles-pp.filename_lookup.vfs_statx.__do_sys_newfstatat.do_syscall_64.entry_SYSCALL_64_after_hwframe
> 0.95 ± 14% -0.4 0.58 ± 4% perf-profile.calltrace.cycles-pp.kmem_cache_free.do_faccessat.do_syscall_64.entry_SYSCALL_64_after_hwframe
> 0.95 ± 7% -0.3 0.61 ± 4% perf-profile.calltrace.cycles-pp.kfree.security_cred_free.put_cred_rcu.do_faccessat.do_syscall_64
> 0.91 ± 10% -0.3 0.57 ± 3% perf-profile.calltrace.cycles-pp.path_lookupat.filename_lookup.vfs_statx.__do_sys_newfstatat.do_syscall_64
> 0.00 +1.0 0.98 ± 4% perf-profile.calltrace.cycles-pp._find_next_bit.cpumask_next.__percpu_counter_sum.__reserve_bytes.btrfs_reserve_metadata_bytes
> 0.00 +1.6 1.56 ± 4% perf-profile.calltrace.cycles-pp.cpumask_next.__percpu_counter_sum.__reserve_bytes.btrfs_reserve_metadata_bytes.btrfs_block_rsv_add
> 0.00 +4.2 4.23 ± 4% perf-profile.calltrace.cycles-pp.__percpu_counter_sum.__reserve_bytes.btrfs_reserve_metadata_bytes.btrfs_block_rsv_add.start_transaction
> 0.00 +12.6 12.55 ± 4% perf-profile.calltrace.cycles-pp.native_queued_spin_lock_slowpath._raw_spin_lock.__reserve_bytes.btrfs_reserve_metadata_bytes.btrfs_block_rsv_add
> 0.00 +13.0 13.01 ± 4% perf-profile.calltrace.cycles-pp._raw_spin_lock.__reserve_bytes.btrfs_reserve_metadata_bytes.btrfs_block_rsv_add.start_transaction
> 0.00 +15.3 15.29 ± 3% perf-profile.calltrace.cycles-pp.native_queued_spin_lock_slowpath._raw_spin_lock.btrfs_block_rsv_release.btrfs_trans_release_metadata.__btrfs_end_transaction
> 0.00 +15.8 15.81 ± 3% perf-profile.calltrace.cycles-pp._raw_spin_lock.btrfs_block_rsv_release.btrfs_trans_release_metadata.__btrfs_end_transaction.btrfs_dirty_inode
> 0.00 +16.0 16.04 ± 3% perf-profile.calltrace.cycles-pp.btrfs_block_rsv_release.btrfs_trans_release_metadata.__btrfs_end_transaction.btrfs_dirty_inode.btrfs_setattr
> 0.00 +16.0 16.05 ± 3% perf-profile.calltrace.cycles-pp.btrfs_trans_release_metadata.__btrfs_end_transaction.btrfs_dirty_inode.btrfs_setattr.notify_change
> 0.63 ± 10% +16.7 17.34 ± 3% perf-profile.calltrace.cycles-pp.__btrfs_end_transaction.btrfs_dirty_inode.btrfs_setattr.notify_change.chmod_common
> 0.00 +18.3 18.27 ± 4% perf-profile.calltrace.cycles-pp.__reserve_bytes.btrfs_reserve_metadata_bytes.btrfs_block_rsv_add.start_transaction.btrfs_dirty_inode
> 0.00 +18.4 18.39 ± 4% perf-profile.calltrace.cycles-pp.btrfs_reserve_metadata_bytes.btrfs_block_rsv_add.start_transaction.btrfs_dirty_inode.btrfs_setattr
> 2.18 ± 12% +18.4 20.61 ± 4% perf-profile.calltrace.cycles-pp.start_transaction.btrfs_dirty_inode.btrfs_setattr.notify_change.chmod_common
> 0.00 +18.9 18.88 ± 4% perf-profile.calltrace.cycles-pp.btrfs_block_rsv_add.start_transaction.btrfs_dirty_inode.btrfs_setattr.notify_change
> 9.24 ± 10% +32.2 41.40 ± 3% perf-profile.calltrace.cycles-pp.__x64_sys_fchmod.do_syscall_64.entry_SYSCALL_64_after_hwframe
> 9.16 ± 10% +32.2 41.36 ± 3% perf-profile.calltrace.cycles-pp.chmod_common.__x64_sys_fchmod.do_syscall_64.entry_SYSCALL_64_after_hwframe
> 8.30 ± 9% +32.6 40.94 ± 3% perf-profile.calltrace.cycles-pp.notify_change.chmod_common.__x64_sys_fchmod.do_syscall_64.entry_SYSCALL_64_after_hwframe
> 8.09 ± 10% +32.7 40.80 ± 3% perf-profile.calltrace.cycles-pp.btrfs_setattr.notify_change.chmod_common.__x64_sys_fchmod.do_syscall_64
> 7.74 ± 9% +32.8 40.56 ± 4% perf-profile.calltrace.cycles-pp.btrfs_dirty_inode.btrfs_setattr.notify_change.chmod_common.__x64_sys_fchmod
> 47.72 ± 11% -27.3 20.41 ± 3% perf-profile.children.cycles-pp.do_faccessat
> 20.57 ± 11% -12.1 8.51 ± 3% perf-profile.children.cycles-pp.prepare_creds
> 18.81 ± 11% -11.9 6.93 ± 3% perf-profile.children.cycles-pp.put_cred_rcu
> 5.42 ± 12% -3.8 1.60 ± 3% perf-profile.children.cycles-pp.free_uid
> 5.39 ± 12% -3.8 1.58 ± 3% perf-profile.children.cycles-pp.refcount_dec_and_lock_irqsave
> 5.36 ± 12% -3.8 1.56 ± 3% perf-profile.children.cycles-pp.refcount_dec_not_one
> 5.34 ± 11% -3.1 2.21 ± 3% perf-profile.children.cycles-pp.key_put
> 5.18 ± 11% -2.4 2.75 ± 4% perf-profile.children.cycles-pp.security_prepare_creds
> 4.77 ± 8% -2.3 2.50 ± 4% perf-profile.children.cycles-pp.btrfs_update_inode
> 3.80 ± 7% -2.0 1.84 ± 4% perf-profile.children.cycles-pp.btrfs_delayed_update_inode
> 3.54 ± 12% -1.8 1.74 ± 4% perf-profile.children.cycles-pp.apparmor_cred_prepare
> 3.49 ± 9% -1.8 1.72 ± 6% perf-profile.children.cycles-pp.security_cred_free
> 4.39 ± 11% -1.7 2.68 ± 5% perf-profile.children.cycles-pp.filename_lookup
> 3.93 ± 11% -1.5 2.40 ± 5% perf-profile.children.cycles-pp.path_lookupat
> 2.50 ± 9% -1.4 1.09 ± 9% perf-profile.children.cycles-pp.apparmor_cred_free
> 3.26 ± 11% -1.3 1.96 ± 3% perf-profile.children.cycles-pp.__do_sys_newfstatat
> 2.90 ± 10% -1.1 1.75 ± 3% perf-profile.children.cycles-pp.vfs_statx
> 2.47 ± 7% -1.1 1.34 ± 3% perf-profile.children.cycles-pp.__btrfs_release_delayed_node
> 1.55 ± 11% -1.1 0.49 ± 7% perf-profile.children.cycles-pp.join_transaction
> 2.37 ± 11% -0.9 1.49 ± 6% perf-profile.children.cycles-pp.link_path_walk
> 2.11 ± 10% -0.9 1.23 ± 4% perf-profile.children.cycles-pp.kmem_cache_alloc
> 2.13 ± 9% -0.8 1.30 ± 4% perf-profile.children.cycles-pp.user_path_at_empty
> 2.08 ± 9% -0.8 1.29 ± 4% perf-profile.children.cycles-pp.getname_flags
> 1.17 ± 12% -0.7 0.50 ± 6% perf-profile.children.cycles-pp.common_perm_cond
> 1.58 ± 14% -0.7 0.92 ± 7% perf-profile.children.cycles-pp.inode_permission
> 1.10 ± 12% -0.6 0.46 ± 6% perf-profile.children.cycles-pp.common_perm
> 1.58 ± 9% -0.6 0.97 ± 3% perf-profile.children.cycles-pp.__kmalloc
> 1.56 ± 11% -0.6 0.99 ± 4% perf-profile.children.cycles-pp.strncpy_from_user
> 1.29 ± 14% -0.5 0.79 ± 5% perf-profile.children.cycles-pp.kmem_cache_free
> 1.10 ± 13% -0.5 0.62 ± 13% perf-profile.children.cycles-pp.mutex_lock
> 0.59 ± 10% -0.4 0.14 ± 16% perf-profile.children.cycles-pp.btrfs_get_or_create_delayed_node
> 0.57 ± 10% -0.4 0.14 ± 18% perf-profile.children.cycles-pp.btrfs_get_delayed_node
> 0.83 ± 13% -0.4 0.46 ± 4% perf-profile.children.cycles-pp.generic_permission
> 0.91 ± 10% -0.4 0.56 ± 6% perf-profile.children.cycles-pp.walk_component
> 0.96 ± 7% -0.4 0.61 ± 4% perf-profile.children.cycles-pp.kfree
> 0.60 ± 14% -0.3 0.26 ± 3% perf-profile.children.cycles-pp.security_path_chmod
> 0.65 ± 10% -0.3 0.31 ± 7% perf-profile.children.cycles-pp.vfs_getattr
> 0.64 ± 10% -0.3 0.30 ± 7% perf-profile.children.cycles-pp.security_inode_getattr
> 0.77 ± 12% -0.3 0.46 ± 6% perf-profile.children.cycles-pp.btrfs_update_root_times
> 0.69 ± 5% -0.3 0.39 ± 5% perf-profile.children.cycles-pp.mutex_unlock
> 0.65 ± 12% -0.3 0.39 ± 9% perf-profile.children.cycles-pp.syscall_return_via_sysret
> 0.70 ± 9% -0.3 0.44 ± 4% perf-profile.children.cycles-pp.__check_object_size
> 0.62 ± 12% -0.3 0.37 ± 3% perf-profile.children.cycles-pp.complete_walk
> 0.51 ± 12% -0.3 0.26 ± 5% perf-profile.children.cycles-pp.get_obj_cgroup_from_current
> 0.46 ± 31% -0.2 0.22 ± 16% perf-profile.children.cycles-pp.revert_creds
> 0.59 ± 12% -0.2 0.36 ± 3% perf-profile.children.cycles-pp.unlazy_walk
> 0.48 ± 11% -0.2 0.28 ± 5% perf-profile.children.cycles-pp.obj_cgroup_charge
> 0.58 ± 10% -0.2 0.38 ± 3% perf-profile.children.cycles-pp.btrfs_getattr
> 0.52 ± 10% -0.2 0.33 ± 9% perf-profile.children.cycles-pp.lookup_fast
> 0.47 ± 20% -0.2 0.29 ± 15% perf-profile.children.cycles-pp.btrfs_permission
> 0.33 ± 12% -0.2 0.15 ± 8% perf-profile.children.cycles-pp.capable_wrt_inode_uidgid
> 0.46 ± 12% -0.2 0.29 perf-profile.children.cycles-pp.__legitimize_path
> 0.32 ± 12% -0.2 0.14 ± 10% perf-profile.children.cycles-pp.security_capable
> 0.31 ± 12% -0.2 0.13 ± 11% perf-profile.children.cycles-pp.apparmor_capable
> 0.32 ± 12% -0.2 0.15 ± 8% perf-profile.children.cycles-pp.ns_capable_common
> 0.45 ± 9% -0.2 0.28 ± 10% perf-profile.children.cycles-pp.refill_obj_stock
> 0.28 ± 63% -0.2 0.12 ± 27% perf-profile.children.cycles-pp.map_id_up
> 0.35 ± 28% -0.1 0.20 ± 10% perf-profile.children.cycles-pp.cp_new_stat
> 0.42 ± 10% -0.1 0.28 ± 6% perf-profile.children.cycles-pp.__mod_memcg_lruvec_state
> 0.36 ± 10% -0.1 0.23 ± 8% perf-profile.children.cycles-pp.path_put
> 0.35 ± 10% -0.1 0.22 ± 11% perf-profile.children.cycles-pp.dput
> 0.35 ± 9% -0.1 0.22 ± 9% perf-profile.children.cycles-pp.__d_lookup_rcu
> 0.32 ± 10% -0.1 0.19 ± 12% perf-profile.children.cycles-pp.path_init
> 0.36 ± 14% -0.1 0.24 ± 5% perf-profile.children.cycles-pp.__entry_text_start
> 0.35 ± 11% -0.1 0.23 ± 9% perf-profile.children.cycles-pp.___might_sleep
> 0.32 ± 9% -0.1 0.20 ± 4% perf-profile.children.cycles-pp.__check_heap_object
> 0.27 ± 10% -0.1 0.16 ± 7% perf-profile.children.cycles-pp.__list_add_valid
> 0.26 ± 7% -0.1 0.16 ± 11% perf-profile.children.cycles-pp.__might_sleep
> 0.23 ± 15% -0.1 0.13 ± 5% perf-profile.children.cycles-pp._cond_resched
> 0.19 ± 39% -0.1 0.09 ± 7% perf-profile.children.cycles-pp.fill_stack_inode_item
> 0.23 ± 14% -0.1 0.14 ± 12% perf-profile.children.cycles-pp.syscall_enter_from_user_mode
> 0.23 ± 14% -0.1 0.15 ± 7% perf-profile.children.cycles-pp.__legitimize_mnt
> 0.18 ± 14% -0.1 0.10 ± 11% perf-profile.children.cycles-pp.override_creds
> 0.17 ± 15% -0.1 0.10 ± 11% perf-profile.children.cycles-pp.__list_del_entry_valid
> 0.18 ± 13% -0.1 0.10 ± 12% perf-profile.children.cycles-pp.step_into
> 0.19 ± 14% -0.1 0.12 ± 12% perf-profile.children.cycles-pp.lockref_get_not_dead
> 0.20 ± 10% -0.1 0.13 ± 12% perf-profile.children.cycles-pp.__mod_memcg_state
> 0.19 ± 16% -0.1 0.12 ± 11% perf-profile.children.cycles-pp.rcu_read_unlock_strict
> 0.15 ± 14% -0.1 0.09 ± 13% perf-profile.children.cycles-pp.lockref_put_or_lock
> 0.17 ± 11% -0.1 0.12 ± 3% perf-profile.children.cycles-pp.memset_erms
> 0.17 ± 17% -0.1 0.12 ± 7% perf-profile.children.cycles-pp.syscall_exit_to_user_mode
> 0.16 ± 7% -0.1 0.11 ± 4% perf-profile.children.cycles-pp._copy_to_user
> 0.10 ± 21% -0.1 0.04 ± 58% perf-profile.children.cycles-pp.mnt_want_write
> 0.11 ± 9% -0.0 0.07 ± 13% perf-profile.children.cycles-pp.inode_get_bytes
> 0.11 ± 18% -0.0 0.07 ± 13% perf-profile.children.cycles-pp.rcu_all_qs
> 0.11 ± 16% -0.0 0.06 ± 11% perf-profile.children.cycles-pp.security_inode_permission
> 0.10 -0.0 0.05 ± 8% perf-profile.children.cycles-pp.__fget_light
> 0.11 ± 13% -0.0 0.07 ± 7% perf-profile.children.cycles-pp.entry_SYSCALL_64_safe_stack
> 0.12 ± 12% -0.0 0.08 ± 8% perf-profile.children.cycles-pp.copy_user_enhanced_fast_string
> 0.10 ± 19% -0.0 0.07 ± 7% perf-profile.children.cycles-pp.__put_cred
> 0.11 ± 14% -0.0 0.07 ± 14% perf-profile.children.cycles-pp.btrfs_balance_delayed_items
> 0.09 ± 14% -0.0 0.06 ± 14% perf-profile.children.cycles-pp.exit_to_user_mode_prepare
> 0.10 ± 14% -0.0 0.08 ± 6% perf-profile.children.cycles-pp.__x86_indirect_thunk_rax
> 0.08 ± 10% -0.0 0.06 ± 15% perf-profile.children.cycles-pp.mntput_no_expire
> 0.21 ± 6% +0.1 0.28 ± 12% perf-profile.children.cycles-pp.btrfs_put_transaction
> 0.05 ± 61% +0.1 0.15 ± 9% perf-profile.children.cycles-pp._raw_spin_unlock_irqrestore
> 0.00 +0.2 0.21 ± 10% perf-profile.children.cycles-pp.find_next_bit
> 0.06 ± 17% +0.3 0.38 ± 4% perf-profile.children.cycles-pp._raw_spin_lock_irqsave
> 0.00 +0.4 0.43 ± 14% perf-profile.children.cycles-pp.btrfs_get_alloc_profile
> 0.00 +0.5 0.46 ± 14% perf-profile.children.cycles-pp.calc_available_free_space
> 0.00 +0.5 0.48 ± 2% perf-profile.children.cycles-pp.btrfs_block_rsv_add_bytes
> 0.00 +0.5 0.48 ± 8% perf-profile.children.cycles-pp.wait_current_trans
> 0.00 +1.0 1.00 ± 4% perf-profile.children.cycles-pp._find_next_bit
> 0.00 +1.8 1.77 ± 4% perf-profile.children.cycles-pp.cpumask_next
> 0.00 +4.2 4.24 ± 4% perf-profile.children.cycles-pp.__percpu_counter_sum
> 0.00 +16.0 16.04 ± 3% perf-profile.children.cycles-pp.btrfs_block_rsv_release
> 0.00 +16.0 16.05 ± 3% perf-profile.children.cycles-pp.btrfs_trans_release_metadata
> 0.64 ± 9% +16.7 17.35 ± 3% perf-profile.children.cycles-pp.__btrfs_end_transaction
> 0.00 +18.3 18.27 ± 4% perf-profile.children.cycles-pp.__reserve_bytes
> 0.00 +18.4 18.39 ± 4% perf-profile.children.cycles-pp.btrfs_reserve_metadata_bytes
> 2.19 ± 12% +18.4 20.61 ± 4% perf-profile.children.cycles-pp.start_transaction
> 0.00 +18.9 18.88 ± 4% perf-profile.children.cycles-pp.btrfs_block_rsv_add
> 0.75 ± 8% +27.1 27.88 ± 3% perf-profile.children.cycles-pp.native_queued_spin_lock_slowpath
> 2.32 ± 10% +28.3 30.66 ± 3% perf-profile.children.cycles-pp._raw_spin_lock
> 9.25 ± 10% +32.2 41.41 ± 3% perf-profile.children.cycles-pp.__x64_sys_fchmod
> 9.16 ± 10% +32.2 41.36 ± 3% perf-profile.children.cycles-pp.chmod_common
> 8.31 ± 9% +32.6 40.95 ± 3% perf-profile.children.cycles-pp.notify_change
> 8.10 ± 10% +32.7 40.80 ± 3% perf-profile.children.cycles-pp.btrfs_setattr
> 7.75 ± 9% +32.8 40.56 ± 4% perf-profile.children.cycles-pp.btrfs_dirty_inode
> 13.73 ± 11% -8.9 4.81 ± 4% perf-profile.self.cycles-pp.prepare_creds
> 5.33 ± 12% -3.8 1.55 ± 3% perf-profile.self.cycles-pp.refcount_dec_not_one
> 4.57 ± 11% -3.1 1.42 ± 4% perf-profile.self.cycles-pp.put_cred_rcu
> 5.30 ± 11% -3.1 2.19 ± 3% perf-profile.self.cycles-pp.key_put
> 3.53 ± 12% -1.8 1.73 ± 4% perf-profile.self.cycles-pp.apparmor_cred_prepare
> 2.48 ± 9% -1.4 1.08 ± 9% perf-profile.self.cycles-pp.apparmor_cred_free
> 1.10 ± 12% -0.6 0.45 ± 5% perf-profile.self.cycles-pp.common_perm
> 1.04 ± 14% -0.5 0.58 ± 13% perf-profile.self.cycles-pp.mutex_lock
> 0.57 ± 11% -0.4 0.13 ± 20% perf-profile.self.cycles-pp.btrfs_get_delayed_node
> 1.06 ± 9% -0.4 0.63 ± 5% perf-profile.self.cycles-pp.kmem_cache_alloc
> 1.02 ± 10% -0.4 0.64 ± 4% perf-profile.self.cycles-pp.link_path_walk
> 0.93 ± 14% -0.4 0.55 ± 5% perf-profile.self.cycles-pp.kmem_cache_free
> 0.79 ± 8% -0.3 0.48 ± 4% perf-profile.self.cycles-pp.__kmalloc
> 0.69 ± 5% -0.3 0.39 ± 6% perf-profile.self.cycles-pp.mutex_unlock
> 0.72 ± 11% -0.3 0.46 ± 5% perf-profile.self.cycles-pp.strncpy_from_user
> 0.65 ± 12% -0.3 0.39 ± 9% perf-profile.self.cycles-pp.syscall_return_via_sysret
> 0.46 ± 31% -0.2 0.22 ± 16% perf-profile.self.cycles-pp.revert_creds
> 0.64 ± 9% -0.2 0.40 ± 3% perf-profile.self.cycles-pp.kfree
> 0.60 ± 9% -0.2 0.38 ± 7% perf-profile.self.cycles-pp.join_transaction
> 0.41 ± 11% -0.2 0.22 ± 5% perf-profile.self.cycles-pp.get_obj_cgroup_from_current
> 0.45 ± 10% -0.2 0.27 ± 5% perf-profile.self.cycles-pp.obj_cgroup_charge
> 0.30 ± 13% -0.2 0.13 ± 11% perf-profile.self.cycles-pp.apparmor_capable
> 0.44 ± 20% -0.2 0.28 ± 16% perf-profile.self.cycles-pp.btrfs_permission
> 0.42 ± 11% -0.2 0.27 ± 8% perf-profile.self.cycles-pp.generic_permission
> 0.42 ± 8% -0.2 0.27 ± 10% perf-profile.self.cycles-pp.refill_obj_stock
> 0.47 ± 10% -0.2 0.32 ± 2% perf-profile.self.cycles-pp.btrfs_getattr
> 0.27 ± 65% -0.2 0.12 ± 25% perf-profile.self.cycles-pp.map_id_up
> 0.36 ± 14% -0.1 0.23 ± 4% perf-profile.self.cycles-pp.__entry_text_start
> 0.34 ± 10% -0.1 0.22 ± 9% perf-profile.self.cycles-pp.__d_lookup_rcu
> 0.38 ± 11% -0.1 0.25 ± 5% perf-profile.self.cycles-pp.do_faccessat
> 0.32 ± 19% -0.1 0.20 ± 13% perf-profile.self.cycles-pp.inode_permission
> 0.34 ± 13% -0.1 0.22 ± 9% perf-profile.self.cycles-pp.___might_sleep
> 0.31 ± 9% -0.1 0.20 ± 4% perf-profile.self.cycles-pp.__check_heap_object
> 0.27 ± 10% -0.1 0.16 ± 7% perf-profile.self.cycles-pp.__list_add_valid
> 0.28 ± 11% -0.1 0.17 ± 11% perf-profile.self.cycles-pp.path_init
> 0.25 ± 8% -0.1 0.15 ± 10% perf-profile.self.cycles-pp.__might_sleep
> 0.26 ± 8% -0.1 0.16 ± 7% perf-profile.self.cycles-pp.__check_object_size
> 0.23 ± 16% -0.1 0.13 ± 13% perf-profile.self.cycles-pp.syscall_enter_from_user_mode
> 0.17 ± 16% -0.1 0.09 ± 7% perf-profile.self.cycles-pp.override_creds
> 0.22 ± 15% -0.1 0.14 ± 8% perf-profile.self.cycles-pp.__legitimize_mnt
> 0.20 ± 13% -0.1 0.12 ± 12% perf-profile.self.cycles-pp.entry_SYSCALL_64_after_hwframe
> 0.14 ± 18% -0.1 0.06 perf-profile.self.cycles-pp.btrfs_update_inode
> 0.21 ± 13% -0.1 0.13 ± 5% perf-profile.self.cycles-pp.walk_component
> 0.17 ± 11% -0.1 0.10 ± 11% perf-profile.self.cycles-pp.step_into
> 0.17 ± 17% -0.1 0.10 ± 11% perf-profile.self.cycles-pp.__list_del_entry_valid
> 0.19 ± 14% -0.1 0.12 ± 12% perf-profile.self.cycles-pp.lockref_get_not_dead
> 0.20 ± 10% -0.1 0.13 ± 12% perf-profile.self.cycles-pp.__mod_memcg_state
> 0.16 ± 10% -0.1 0.10 ± 11% perf-profile.self.cycles-pp.lookup_fast
> 0.15 ± 14% -0.1 0.08 ± 13% perf-profile.self.cycles-pp.lockref_put_or_lock
> 0.20 ± 10% -0.1 0.14 ± 5% perf-profile.self.cycles-pp.__mod_memcg_lruvec_state
> 0.15 ± 14% -0.1 0.08 ± 10% perf-profile.self.cycles-pp.filename_lookup
> 0.17 ± 9% -0.1 0.11 ± 3% perf-profile.self.cycles-pp.memset_erms
> 0.14 ± 12% -0.1 0.08 ± 5% perf-profile.self.cycles-pp.getname_flags
> 0.07 ± 11% -0.0 0.03 ±100% perf-profile.self.cycles-pp.dput
> 0.11 ± 16% -0.0 0.06 ± 11% perf-profile.self.cycles-pp.security_inode_permission
> 0.15 ± 15% -0.0 0.10 ± 14% perf-profile.self.cycles-pp.rcu_read_unlock_strict
> 0.12 ± 12% -0.0 0.08 ± 10% perf-profile.self.cycles-pp.copy_user_enhanced_fast_string
> 0.11 ± 11% -0.0 0.06 ± 13% perf-profile.self.cycles-pp._cond_resched
> 0.11 ± 13% -0.0 0.07 ± 7% perf-profile.self.cycles-pp.entry_SYSCALL_64_safe_stack
> 0.10 ± 5% -0.0 0.05 ± 8% perf-profile.self.cycles-pp.__fget_light
> 0.10 ± 19% -0.0 0.07 ± 13% perf-profile.self.cycles-pp.path_lookupat
> 0.11 ± 14% -0.0 0.07 ± 20% perf-profile.self.cycles-pp.btrfs_balance_delayed_items
> 0.10 ± 14% -0.0 0.07 ± 10% perf-profile.self.cycles-pp.__virt_addr_valid
> 0.10 ± 21% -0.0 0.06 ± 6% perf-profile.self.cycles-pp.__put_cred
> 0.07 ± 11% -0.0 0.04 ± 60% perf-profile.self.cycles-pp.exit_to_user_mode_prepare
> 0.09 ± 20% -0.0 0.06 ± 17% perf-profile.self.cycles-pp.notify_change
> 0.07 ± 12% -0.0 0.05 ± 8% perf-profile.self.cycles-pp.mntput_no_expire
> 0.21 ± 6% +0.1 0.28 ± 12% perf-profile.self.cycles-pp.btrfs_put_transaction
> 0.05 ± 62% +0.1 0.13 ± 11% perf-profile.self.cycles-pp._raw_spin_unlock_irqrestore
> 0.00 +0.1 0.12 ± 5% perf-profile.self.cycles-pp.btrfs_reserve_metadata_bytes
> 0.00 +0.1 0.14 ± 13% perf-profile.self.cycles-pp.btrfs_block_rsv_release
> 0.00 +0.2 0.16 ± 18% perf-profile.self.cycles-pp.btrfs_get_alloc_profile
> 0.00 +0.2 0.18 ± 7% perf-profile.self.cycles-pp.wait_current_trans
> 0.46 ± 15% +0.2 0.64 ± 6% perf-profile.self.cycles-pp.start_transaction
> 0.00 +0.2 0.21 ± 10% perf-profile.self.cycles-pp.find_next_bit
> 0.06 ± 20% +0.3 0.38 ± 4% perf-profile.self.cycles-pp._raw_spin_lock_irqsave
> 0.00 +0.6 0.57 ± 14% perf-profile.self.cycles-pp.__reserve_bytes
> 0.00 +0.6 0.57 ± 7% perf-profile.self.cycles-pp.cpumask_next
> 0.36 ± 12% +0.6 0.98 ± 11% perf-profile.self.cycles-pp.__btrfs_end_transaction
> 0.00 +1.0 0.99 ± 4% perf-profile.self.cycles-pp._find_next_bit
> 1.57 ± 11% +1.2 2.77 ± 6% perf-profile.self.cycles-pp._raw_spin_lock
> 0.00 +2.1 2.08 ± 4% perf-profile.self.cycles-pp.__percpu_counter_sum
> 0.73 ± 8% +27.1 27.79 ± 3% perf-profile.self.cycles-pp.native_queued_spin_lock_slowpath
>
>
>
> stress-ng.access.ops
>
> 1.2e+06 +-----------------------------------------------------------------+
> | +..+..+..+.. .+..+..+. .+.. .+..+..+..+..+..+..+ |
> 1e+06 |-+ : +. +. +. |
> | : |
> | : |
> 800000 |-+ : |
> | : O O O O O O O O O O O O |
> 600000 |-+O :O O O O O O O O |
> | : |
> 400000 |-+ : |
> | : |
> | : |
> 200000 |-+: |
> | : |
> 0 +-----------------------------------------------------------------+
>
>
> stress-ng.access.ops_per_sec
>
> 40000 +-------------------------------------------------------------------+
> | +..+..+..+... .+..+..+. .+.. .+..+...+..+..+..+..+ |
> 35000 |-+ : +. +. +. |
> 30000 |-+ : |
> | : |
> 25000 |-+ : |
> | : O O O O O O O O O O O O |
> 20000 |-+O :O O O O O O O O |
> | : |
> 15000 |-+ : |
> 10000 |-+ : |
> | : |
> 5000 |-+: |
> | : |
> 0 +-------------------------------------------------------------------+
>
>
> stress-ng.chmod.ops
>
> 140000 +------------------------------------------------------------------+
> | +.. |
> 120000 |-+ : +..+.. .+.. |
> | : +.. .. +. +.. +.. +.. +.. |
> 100000 |-+ : + ..+.. .. .. .. +.. |
> | : +. + + + +..+..+ |
> 80000 |-+ : |
> | : |
> 60000 |-+ : O O O |
> | O: O O O O O O O O O O O O O O O O O |
> 40000 |-+ : |
> | : |
> 20000 |-+: |
> | : |
> 0 +------------------------------------------------------------------+
>
>
> stress-ng.chmod.ops_per_sec
>
> 4500 +--------------------------------------------------------------------+
> | +.. +.. .+.. |
> 4000 |-+ : + +..+. +.. +.. |
> 3500 |-+ : +... + .+.. .+.. + |
> | : + +...+..+. +. + +... .+..+ |
> 3000 |-+ : + +. |
> 2500 |-+ : |
> | : |
> 2000 |-+ : O O O O O O O |
> 1500 |-+O: O O O O O O O O O O O O O |
> | : |
> 1000 |-+ : |
> 500 |-+: |
> | : |
> 0 +--------------------------------------------------------------------+
>
>
> stress-ng.chown.ops
>
> 1.2e+06 +-----------------------------------------------------------------+
> | +..+..+.. .+.. +.. |
> 1e+06 |-+ : +. +.. .+.. .. .+..+.. .+.. |
> | : +. + +..+..+..+. +. .+ |
> | : +. |
> 800000 |-+ : |
> | : |
> 600000 |-+O :O O O O O O O O |
> | : O O O O O O O O O O O O |
> 400000 |-+ : |
> | : |
> | : |
> 200000 |-+: |
> | : |
> 0 +-----------------------------------------------------------------+
>
>
> stress-ng.chown.ops_per_sec
>
> 40000 +-------------------------------------------------------------------+
> | +..+..+.. ..+.. +.. |
> 35000 |-+ : +. +.. .+.. .. .+...+.. .+.. |
> 30000 |-+ : +. + +..+..+..+. +. .+ |
> | : +. |
> 25000 |-+ : |
> | : |
> 20000 |-+O :O O O O O O O O |
> | : O O O O O O O O O O O O |
> 15000 |-+ : |
> 10000 |-+ : |
> | : |
> 5000 |-+: |
> | : |
> 0 +-------------------------------------------------------------------+
>
>
> stress-ng.utime.ops
>
> 4.5e+06 +-----------------------------------------------------------------+
> | .+..+.. .+.. .+.. .+.. |
> 4e+06 |-+ +..+. +. +. +. .+..+..+..+.. .+ |
> 3.5e+06 |-+ : +..+..+..+. +. |
> | : |
> 3e+06 |-+ : |
> 2.5e+06 |-+ : |
> | : |
> 2e+06 |-+ : |
> 1.5e+06 |-+ : |
> | : O O O O O |
> 1e+06 |-+O: O O O O O O O O O O O O O O O |
> 500000 |-+ : |
> | : |
> 0 +-----------------------------------------------------------------+
>
>
> stress-ng.utime.ops_per_sec
>
> 160000 +------------------------------------------------------------------+
> | .+.. +.. |
> 140000 |-+ .+. +.. .. .+.. ..+.. |
> 120000 |-+ +. + +. +. .+.. .+..+..+..+..+.. .+ |
> | : +. +. +. |
> 100000 |-+ : |
> | : |
> 80000 |-+ : |
> | : |
> 60000 |-+ : |
> 40000 |-+ : |
> | O: O O O O O O O O O O O O O O O O O O O O |
> 20000 |-+ : |
> | : |
> 0 +------------------------------------------------------------------+
>
>
> [*] bisect-good sample
> [O] bisect-bad sample
>
>
>
> 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.
>
>
> Thanks,
> Oliver Sang
>
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