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Date: Fri, 19 Apr 2024 13:49:26 +0800
From: kernel test robot <yujie.liu@...el.com>
To: Linus Torvalds <torvalds@...ux-foundation.org>
CC: <oe-lkp@...ts.linux.dev>, <lkp@...el.com>, <linux-kernel@...r.kernel.org>,
Thomas Gleixner <tglx@...utronix.de>, Daniel Sneddon
<daniel.sneddon@...ux.intel.com>, Josh Poimboeuf <jpoimboe@...nel.org>,
<ying.huang@...el.com>, <feng.tang@...el.com>, <fengwei.yin@...el.com>
Subject: [linus:master] [x86/syscall] 1e3ad78334:
will-it-scale.per_process_ops 1.4% improvement
Hi Linus,
We noticed that commit 1e3ad78334a6 caused performance fluctuations in
various micro benchmarks. The perf stat metrics related with branch
instructions do have noticeable changes, which may be an expected
result of this commit. We are sending this report to provide these data
and hope it can be helpful for the awareness of overall impact or any
further investigation. Thanks.
kernel test robot noticed a 1.4% improvement of will-it-scale.per_process_ops on:
commit: 1e3ad78334a69b36e107232e337f9d693dcc9df2 ("x86/syscall: Don't force use of indirect calls for system calls")
https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git master
testcase: will-it-scale
test machine: 104 threads 2 sockets (Skylake) with 192G memory
parameters:
nr_task: 16
mode: process
test: futex4
cpufreq_governor: performance
In addition to that, the commit also has significant impact on the following tests:
+------------------+-------------------------------------------------------------------------------------------+
| testcase: change | stress-ng: stress-ng.null.ops_per_sec -4.0% regression |
| test machine | 64 threads 2 sockets Intel(R) Xeon(R) Gold 6346 CPU @ 3.10GHz (Ice Lake) with 256G memory |
| test parameters | cpufreq_governor=performance |
| | nr_threads=100% |
| | test=null |
| | testtime=60s |
+------------------+-------------------------------------------------------------------------------------------+
| testcase: change | stress-ng: stress-ng.fpunch.ops_per_sec -1.6% regression |
| test machine | 64 threads 2 sockets Intel(R) Xeon(R) Gold 6346 CPU @ 3.10GHz (Ice Lake) with 256G memory |
| test parameters | cpufreq_governor=performance |
| | disk=1HDD |
| | fs=ext4 |
| | nr_threads=100% |
| | test=fpunch |
| | testtime=60s |
+------------------+-------------------------------------------------------------------------------------------+
| testcase: change | unixbench: unixbench.throughput -1.4% regression |
| test machine | 64 threads 2 sockets Intel(R) Xeon(R) Gold 6346 CPU @ 3.10GHz (Ice Lake) with 256G memory |
| test parameters | cpufreq_governor=performance |
| | nr_task=100% |
| | runtime=300s |
| | test=fsbuffer |
+------------------+-------------------------------------------------------------------------------------------+
| testcase: change | will-it-scale: will-it-scale.per_process_ops -1.1% regression |
| test machine | 64 threads 2 sockets Intel(R) Xeon(R) Gold 6346 CPU @ 3.10GHz (Ice Lake) with 256G memory |
| test parameters | cpufreq_governor=performance |
| | mode=process |
| | nr_task=100% |
| | test=pread1 |
+------------------+-------------------------------------------------------------------------------------------+
| testcase: change | will-it-scale: will-it-scale.per_thread_ops -3.4% regression |
| test machine | 64 threads 2 sockets Intel(R) Xeon(R) Gold 6346 CPU @ 3.10GHz (Ice Lake) with 256G memory |
| test parameters | cpufreq_governor=performance |
| | mode=thread |
| | nr_task=100% |
| | test=poll1 |
+------------------+-------------------------------------------------------------------------------------------+
Details are as below:
The kernel config and materials to reproduce are available at:
https://download.01.org/0day-ci/archive/20240419/202404191333.178a0eed-yujie.liu@intel.com
=========================================================================================
compiler/cpufreq_governor/kconfig/mode/nr_task/rootfs/tbox_group/test/testcase:
gcc-13/performance/x86_64-rhel-8.3/process/16/debian-12-x86_64-20240206.cgz/lkp-skl-fpga01/futex4/will-it-scale
commit:
0cd01ac5dc ("x86/bugs: Change commas to semicolons in 'spectre_v2' sysfs file")
1e3ad78334 ("x86/syscall: Don't force use of indirect calls for system calls")
0cd01ac5dcb1e18e 1e3ad78334a69b36e107232e337
---------------- ---------------------------
%stddev %change %stddev
\ | \
860611 -1.4% 848885 proc-vmstat.numa_hit
753301 -1.6% 741136 proc-vmstat.numa_local
21797058 +1.4% 22102512 will-it-scale.16.processes
1362315 +1.4% 1381406 will-it-scale.per_process_ops
21797058 +1.4% 22102512 will-it-scale.workload
0.04 ± 7% -7.4% 0.04 perf-stat.i.MPKI
1.98e+09 +19.2% 2.36e+09 perf-stat.i.branch-instructions
1.47 -1.2 0.30 perf-stat.i.branch-miss-rate%
30820475 -70.4% 9118612 perf-stat.i.branch-misses
3.45 -4.4% 3.30 perf-stat.i.cpi
1.504e+10 +5.1% 1.58e+10 perf-stat.i.instructions
0.29 +4.5% 0.31 perf-stat.i.ipc
0.05 ± 2% -4.2% 0.04 perf-stat.overall.MPKI
1.56 -1.2 0.39 perf-stat.overall.branch-miss-rate%
3.43 -4.3% 3.28 perf-stat.overall.cpi
0.29 +4.5% 0.30 perf-stat.overall.ipc
208138 +3.4% 215312 perf-stat.overall.path-length
1.973e+09 +19.2% 2.353e+09 perf-stat.ps.branch-instructions
30729762 -70.4% 9109071 perf-stat.ps.branch-misses
1.499e+10 +5.1% 1.575e+10 perf-stat.ps.instructions
4.537e+12 +4.9% 4.759e+12 perf-stat.total.instructions
12.23 -0.6 11.60 perf-profile.calltrace.cycles-pp.do_syscall_64.entry_SYSCALL_64_after_hwframe.syscall
10.09 -0.6 9.51 perf-profile.calltrace.cycles-pp.__x64_sys_futex.do_syscall_64.entry_SYSCALL_64_after_hwframe.syscall
22.31 -0.4 21.88 perf-profile.calltrace.cycles-pp.entry_SYSCALL_64_after_hwframe.syscall
9.25 +0.2 9.43 perf-profile.calltrace.cycles-pp.entry_SYSCALL_64.syscall
8.79 +0.2 9.02 perf-profile.calltrace.cycles-pp.do_futex.__x64_sys_futex.do_syscall_64.entry_SYSCALL_64_after_hwframe.syscall
7.13 +0.2 7.36 perf-profile.calltrace.cycles-pp.__futex_wait.futex_wait.do_futex.__x64_sys_futex.do_syscall_64
8.37 +0.3 8.63 perf-profile.calltrace.cycles-pp.futex_wait.do_futex.__x64_sys_futex.do_syscall_64.entry_SYSCALL_64_after_hwframe
12.38 -0.6 11.78 perf-profile.children.cycles-pp.do_syscall_64
10.12 -0.5 9.57 perf-profile.children.cycles-pp.__x64_sys_futex
22.63 -0.4 22.20 perf-profile.children.cycles-pp.entry_SYSCALL_64_after_hwframe
0.48 ± 2% -0.0 0.46 perf-profile.children.cycles-pp.get_futex_key
0.00 +0.2 0.18 ± 2% perf-profile.children.cycles-pp.x64_sys_call
9.11 +0.2 9.29 perf-profile.children.cycles-pp.entry_SYSCALL_64
8.88 +0.2 9.11 perf-profile.children.cycles-pp.do_futex
7.13 +0.2 7.36 perf-profile.children.cycles-pp.__futex_wait
8.43 +0.3 8.70 perf-profile.children.cycles-pp.futex_wait
1.20 -0.7 0.47 perf-profile.self.cycles-pp.__x64_sys_futex
1.46 -0.2 1.27 perf-profile.self.cycles-pp.do_syscall_64
0.51 -0.1 0.44 perf-profile.self.cycles-pp.do_futex
0.38 ± 5% -0.1 0.32 ± 4% perf-profile.self.cycles-pp.syscall_exit_to_user_mode
0.48 ± 2% -0.0 0.45 perf-profile.self.cycles-pp.get_futex_key
0.00 +0.1 0.15 ± 2% perf-profile.self.cycles-pp.x64_sys_call
7.97 +0.1 8.12 perf-profile.self.cycles-pp.entry_SYSCALL_64
10.43 +0.2 10.60 perf-profile.self.cycles-pp.entry_SYSCALL_64_after_hwframe
0.72 ± 3% +0.2 0.94 ± 3% perf-profile.self.cycles-pp.__futex_wait
***************************************************************************************************
lkp-icl-2sp8: 64 threads 2 sockets Intel(R) Xeon(R) Gold 6346 CPU @ 3.10GHz (Ice Lake) with 256G memory
=========================================================================================
compiler/cpufreq_governor/disk/fs/kconfig/nr_threads/rootfs/tbox_group/test/testcase/testtime:
gcc-13/performance/1HDD/btrfs/x86_64-rhel-8.3/100%/debian-12-x86_64-20240206.cgz/lkp-icl-2sp8/utime/stress-ng/60s
commit:
0cd01ac5dc ("x86/bugs: Change commas to semicolons in 'spectre_v2' sysfs file")
1e3ad78334 ("x86/syscall: Don't force use of indirect calls for system calls")
0cd01ac5dcb1e18e 1e3ad78334a69b36e107232e337
---------------- ---------------------------
%stddev %change %stddev
\ | \
136026 ± 3% +20.6% 164016 ± 11% meminfo.DirectMap4k
5.516e+10 +1.5% 5.598e+10 perf-stat.i.branch-instructions
5.427e+10 +1.5% 5.508e+10 perf-stat.ps.branch-instructions
137060 ± 23% +35.5% 185722 ± 7% numa-numastat.node0.local_node
50345 ± 26% -56.2% 22060 ± 77% numa-numastat.node0.other_node
289383 ± 9% -17.6% 238445 ± 6% numa-numastat.node1.local_node
15965 ± 85% +177.3% 44264 ± 38% numa-numastat.node1.other_node
136562 ± 23% +35.6% 185165 ± 7% numa-vmstat.node0.numa_local
50345 ± 26% -56.2% 22060 ± 77% numa-vmstat.node0.numa_other
288523 ± 9% -17.7% 237526 ± 6% numa-vmstat.node1.numa_local
15965 ± 85% +177.3% 44264 ± 38% numa-vmstat.node1.numa_other
1.71 -0.5 1.18 perf-profile.calltrace.cycles-pp.mnt_want_write.vfs_utimes.do_utimes.__x64_sys_utimensat.do_syscall_64
43.01 -0.3 42.68 perf-profile.calltrace.cycles-pp.user_path_at_empty.do_utimes.__x64_sys_utimensat.do_syscall_64.entry_SYSCALL_64_after_hwframe
23.61 -0.3 23.34 perf-profile.calltrace.cycles-pp.do_utimes.__x64_sys_utimensat.do_syscall_64.entry_SYSCALL_64_after_hwframe.utimensat
26.52 -0.2 26.27 perf-profile.calltrace.cycles-pp.__x64_sys_utimensat.do_syscall_64.entry_SYSCALL_64_after_hwframe.utimensat
16.22 -0.2 16.00 perf-profile.calltrace.cycles-pp.do_utimes.__x64_sys_utime.do_syscall_64.entry_SYSCALL_64_after_hwframe.syscall
13.89 -0.2 13.68 perf-profile.calltrace.cycles-pp.user_path_at_empty.do_utimes.__x64_sys_utime.do_syscall_64.entry_SYSCALL_64_after_hwframe
39.07 -0.2 38.87 perf-profile.calltrace.cycles-pp.do_utimes.__x64_sys_utimensat.do_syscall_64.entry_SYSCALL_64_after_hwframe
16.75 -0.2 16.56 perf-profile.calltrace.cycles-pp.__x64_sys_utime.do_syscall_64.entry_SYSCALL_64_after_hwframe.syscall
15.77 -0.2 15.58 perf-profile.calltrace.cycles-pp.filename_lookup.user_path_at_empty.do_utimes.__x64_sys_utimensat.do_syscall_64
10.55 -0.2 10.37 perf-profile.calltrace.cycles-pp.getname_flags.user_path_at_empty.do_utimes.__x64_sys_utime.do_syscall_64
13.78 -0.2 13.60 perf-profile.calltrace.cycles-pp.path_lookupat.filename_lookup.user_path_at_empty.do_utimes.__x64_sys_utimensat
9.48 -0.2 9.31 perf-profile.calltrace.cycles-pp.strncpy_from_user.getname_flags.user_path_at_empty.do_utimes.__x64_sys_utime
29.46 -0.1 29.32 perf-profile.calltrace.cycles-pp.utimensat
25.18 -0.1 25.05 perf-profile.calltrace.cycles-pp.getname_flags.user_path_at_empty.do_utimes.__x64_sys_utimensat.do_syscall_64
21.74 -0.1 21.62 perf-profile.calltrace.cycles-pp.strncpy_from_user.getname_flags.user_path_at_empty.do_utimes.__x64_sys_utimensat
27.48 -0.1 27.35 perf-profile.calltrace.cycles-pp.entry_SYSCALL_64_after_hwframe.utimensat
43.89 -0.1 43.77 perf-profile.calltrace.cycles-pp.__x64_sys_utimensat.do_syscall_64.entry_SYSCALL_64_after_hwframe
17.24 -0.1 17.13 perf-profile.calltrace.cycles-pp.entry_SYSCALL_64_after_hwframe.syscall
27.21 -0.1 27.11 perf-profile.calltrace.cycles-pp.do_syscall_64.entry_SYSCALL_64_after_hwframe.utimensat
17.10 -0.1 17.00 perf-profile.calltrace.cycles-pp.do_syscall_64.entry_SYSCALL_64_after_hwframe.syscall
18.02 -0.1 17.93 perf-profile.calltrace.cycles-pp.syscall
3.82 -0.1 3.76 perf-profile.calltrace.cycles-pp.__check_object_size.strncpy_from_user.getname_flags.user_path_at_empty.do_utimes
0.57 -0.0 0.54 perf-profile.calltrace.cycles-pp.syscall_exit_to_user_mode.do_syscall_64.entry_SYSCALL_64_after_hwframe
1.61 -0.0 1.58 perf-profile.calltrace.cycles-pp.check_heap_object.__check_object_size.strncpy_from_user.getname_flags.user_path_at_empty
2.91 -0.0 2.88 perf-profile.calltrace.cycles-pp.filename_lookup.user_path_at_empty.do_utimes.__x64_sys_utime.do_syscall_64
2.43 -0.0 2.40 perf-profile.calltrace.cycles-pp.path_lookupat.filename_lookup.user_path_at_empty.do_utimes.__x64_sys_utime
45.81 +0.1 45.96 perf-profile.calltrace.cycles-pp.entry_SYSCALL_64_after_hwframe
45.27 +0.2 45.45 perf-profile.calltrace.cycles-pp.do_syscall_64.entry_SYSCALL_64_after_hwframe
79.22 -0.7 78.54 perf-profile.children.cycles-pp.do_utimes
57.10 -0.5 56.56 perf-profile.children.cycles-pp.user_path_at_empty
70.66 -0.4 70.29 perf-profile.children.cycles-pp.__x64_sys_utimensat
36.81 -0.3 36.49 perf-profile.children.cycles-pp.getname_flags
31.75 -0.3 31.45 perf-profile.children.cycles-pp.strncpy_from_user
20.12 -0.2 19.91 perf-profile.children.cycles-pp.filename_lookup
17.70 -0.2 17.50 perf-profile.children.cycles-pp.path_lookupat
16.79 -0.2 16.60 perf-profile.children.cycles-pp.__x64_sys_utime
29.54 -0.1 29.40 perf-profile.children.cycles-pp.utimensat
18.34 -0.1 18.25 perf-profile.children.cycles-pp.syscall
19.31 -0.1 19.22 perf-profile.children.cycles-pp.vfs_utimes
4.47 -0.1 4.40 perf-profile.children.cycles-pp.__check_object_size
1.32 -0.1 1.26 perf-profile.children.cycles-pp.syscall_exit_to_user_mode
3.38 -0.1 3.34 perf-profile.children.cycles-pp.walk_component
2.56 -0.0 2.52 perf-profile.children.cycles-pp.lookup_fast
2.08 -0.0 2.04 perf-profile.children.cycles-pp.__d_lookup_rcu
2.33 -0.0 2.30 perf-profile.children.cycles-pp.check_heap_object
2.44 -0.0 2.41 perf-profile.children.cycles-pp.complete_walk
1.07 -0.0 1.05 perf-profile.children.cycles-pp.make_vfsuid
1.30 -0.0 1.28 perf-profile.children.cycles-pp.path_put
0.84 +0.0 0.88 perf-profile.children.cycles-pp.syscall_return_via_sysret
0.00 +0.6 0.63 perf-profile.children.cycles-pp.x64_sys_call
27.25 -0.2 27.02 perf-profile.self.cycles-pp.strncpy_from_user
1.30 -0.1 1.22 perf-profile.self.cycles-pp.do_syscall_64
0.24 -0.0 0.23 perf-profile.self.cycles-pp.may_setattr
0.12 +0.0 0.15 ± 3% perf-profile.self.cycles-pp.__x64_sys_utime
0.84 +0.0 0.88 perf-profile.self.cycles-pp.syscall_return_via_sysret
0.92 +0.1 1.04 perf-profile.self.cycles-pp.__x64_sys_utimensat
0.00 +0.5 0.55 perf-profile.self.cycles-pp.x64_sys_call
***************************************************************************************************
lkp-icl-2sp7: 64 threads 2 sockets Intel(R) Xeon(R) Gold 6346 CPU @ 3.10GHz (Ice Lake) with 256G memory
=========================================================================================
compiler/cpufreq_governor/kconfig/nr_threads/rootfs/tbox_group/test/testcase/testtime:
gcc-13/performance/x86_64-rhel-8.3/100%/debian-12-x86_64-20240206.cgz/lkp-icl-2sp7/readahead/stress-ng/60s
commit:
0cd01ac5dc ("x86/bugs: Change commas to semicolons in 'spectre_v2' sysfs file")
1e3ad78334 ("x86/syscall: Don't force use of indirect calls for system calls")
0cd01ac5dcb1e18e 1e3ad78334a69b36e107232e337
---------------- ---------------------------
%stddev %change %stddev
\ | \
5.631e+10 +2.8% 5.787e+10 perf-stat.i.branch-instructions
5.54e+10 +2.8% 5.695e+10 perf-stat.ps.branch-instructions
55177 ± 10% +36.4% 75281 ± 12% sched_debug.cfs_rq:/.avg_vruntime.stddev
55177 ± 10% +36.4% 75281 ± 12% sched_debug.cfs_rq:/.min_vruntime.stddev
46.20 -0.5 45.74 perf-profile.calltrace.cycles-pp.vfs_read.__x64_sys_pread64.do_syscall_64.entry_SYSCALL_64_after_hwframe.__libc_pread
35.83 -0.4 35.38 perf-profile.calltrace.cycles-pp.filemap_read.vfs_read.__x64_sys_pread64.do_syscall_64.entry_SYSCALL_64_after_hwframe
20.24 -0.3 19.90 perf-profile.calltrace.cycles-pp._copy_to_iter.copy_page_to_iter.filemap_read.vfs_read.__x64_sys_pread64
20.87 -0.3 20.54 perf-profile.calltrace.cycles-pp.copy_page_to_iter.filemap_read.vfs_read.__x64_sys_pread64.do_syscall_64
1.66 -0.1 1.58 perf-profile.calltrace.cycles-pp.__fdget.ksys_readahead.do_syscall_64.entry_SYSCALL_64_after_hwframe.readahead
0.66 ± 3% -0.1 0.60 ± 2% perf-profile.calltrace.cycles-pp.syscall_exit_to_user_mode.do_syscall_64.entry_SYSCALL_64_after_hwframe.readahead.stress_run
0.63 ± 4% -0.0 0.58 ± 2% perf-profile.calltrace.cycles-pp.syscall_exit_to_user_mode.do_syscall_64.entry_SYSCALL_64_after_hwframe.readahead
4.29 -0.0 4.25 perf-profile.calltrace.cycles-pp.__fsnotify_parent.vfs_read.__x64_sys_pread64.do_syscall_64.entry_SYSCALL_64_after_hwframe
2.20 -0.0 2.16 perf-profile.calltrace.cycles-pp.touch_atime.filemap_read.vfs_read.__x64_sys_pread64.do_syscall_64
1.88 -0.0 1.85 perf-profile.calltrace.cycles-pp.atime_needs_update.touch_atime.filemap_read.vfs_read.__x64_sys_pread64
4.33 ± 3% +0.3 4.68 ± 3% perf-profile.calltrace.cycles-pp.entry_SYSCALL_64_after_hwframe.readahead
3.66 ± 3% +0.4 4.05 ± 3% perf-profile.calltrace.cycles-pp.do_syscall_64.entry_SYSCALL_64_after_hwframe.readahead
46.41 -0.5 45.94 perf-profile.children.cycles-pp.vfs_read
48.17 -0.5 47.71 perf-profile.children.cycles-pp.__x64_sys_pread64
36.13 -0.5 35.68 perf-profile.children.cycles-pp.filemap_read
20.30 -0.3 19.96 perf-profile.children.cycles-pp._copy_to_iter
20.97 -0.3 20.64 perf-profile.children.cycles-pp.copy_page_to_iter
55.86 -0.3 55.60 perf-profile.children.cycles-pp.__libc_pread
24.71 -0.2 24.48 perf-profile.children.cycles-pp.stress_readahead
2.62 -0.2 2.46 perf-profile.children.cycles-pp.syscall_exit_to_user_mode
4.54 -0.1 4.45 perf-profile.children.cycles-pp.ksys_readahead
5.33 -0.0 5.28 perf-profile.children.cycles-pp.entry_SYSRETQ_unsafe_stack
4.40 -0.0 4.36 perf-profile.children.cycles-pp.__fsnotify_parent
2.28 -0.0 2.26 perf-profile.children.cycles-pp.touch_atime
2.06 -0.0 2.04 perf-profile.children.cycles-pp.atime_needs_update
0.08 ± 8% -0.0 0.05 ± 8% perf-profile.children.cycles-pp.ktime_get_update_offsets_now
0.78 +0.0 0.81 perf-profile.children.cycles-pp.posix_fadvise
59.97 +0.3 60.27 perf-profile.children.cycles-pp.entry_SYSCALL_64_after_hwframe
58.28 +0.3 58.60 perf-profile.children.cycles-pp.do_syscall_64
18.84 +0.5 19.32 perf-profile.children.cycles-pp.readahead
0.00 +1.2 1.22 perf-profile.children.cycles-pp.x64_sys_call
20.09 -0.3 19.76 perf-profile.self.cycles-pp._copy_to_iter
24.32 -0.2 24.08 perf-profile.self.cycles-pp.stress_readahead
2.65 -0.2 2.47 perf-profile.self.cycles-pp.do_syscall_64
4.84 -0.0 4.80 perf-profile.self.cycles-pp.filemap_read
5.16 -0.0 5.11 perf-profile.self.cycles-pp.entry_SYSRETQ_unsafe_stack
4.27 -0.0 4.22 perf-profile.self.cycles-pp.__fsnotify_parent
0.08 ± 6% -0.0 0.05 ± 7% perf-profile.self.cycles-pp.ktime_get_update_offsets_now
1.82 -0.0 1.80 perf-profile.self.cycles-pp.entry_SYSCALL_64_after_hwframe
0.70 +0.0 0.72 perf-profile.self.cycles-pp.__x64_sys_pread64
0.00 +1.1 1.06 perf-profile.self.cycles-pp.x64_sys_call
***************************************************************************************************
lkp-icl-2sp7: 64 threads 2 sockets Intel(R) Xeon(R) Gold 6346 CPU @ 3.10GHz (Ice Lake) with 256G memory
=========================================================================================
compiler/cpufreq_governor/kconfig/nr_threads/rootfs/tbox_group/test/testcase/testtime:
gcc-13/performance/x86_64-rhel-8.3/100%/debian-12-x86_64-20240206.cgz/lkp-icl-2sp7/null/stress-ng/60s
commit:
0cd01ac5dc ("x86/bugs: Change commas to semicolons in 'spectre_v2' sysfs file")
1e3ad78334 ("x86/syscall: Don't force use of indirect calls for system calls")
0cd01ac5dcb1e18e 1e3ad78334a69b36e107232e337
---------------- ---------------------------
%stddev %change %stddev
\ | \
19402 ± 14% +63.7% 31762 ± 28% sched_debug.cpu.nr_switches.max
3272 ± 10% +40.4% 4595 ± 21% sched_debug.cpu.nr_switches.stddev
3241 +10.1% 3569 ± 9% vmstat.system.cs
162368 -0.9% 160961 vmstat.system.in
6303220 -3.7% 6068707 proc-vmstat.numa_hit
6236896 -3.8% 6002419 proc-vmstat.numa_local
6341375 -3.7% 6107478 proc-vmstat.pgalloc_normal
6171078 -3.7% 5941105 proc-vmstat.pgfault
6144519 -3.8% 5913179 proc-vmstat.pgfree
19272 -3.3% 18627 stress-ng.null.MB_per_sec_/dev/null_write_rate
2.902e+09 -4.0% 2.787e+09 stress-ng.null.ops
48365768 -4.0% 46449880 stress-ng.null.ops_per_sec
5809136 -3.9% 5580207 stress-ng.time.minor_page_faults
2394 +1.6% 2431 stress-ng.time.system_time
1324 -2.7% 1289 stress-ng.time.user_time
3.529e+10 +18.8% 4.19e+10 perf-stat.i.branch-instructions
0.24 ± 3% -0.1 0.19 ± 3% perf-stat.i.branch-miss-rate%
85202098 ± 4% -9.4% 77223454 ± 3% perf-stat.i.branch-misses
3168 ± 2% +11.4% 3529 ± 10% perf-stat.i.context-switches
1.03 -2.7% 1.00 perf-stat.i.cpi
1.897e+11 +2.7% 1.949e+11 perf-stat.i.instructions
0.97 +2.7% 1.00 perf-stat.i.ipc
3.14 -3.8% 3.03 perf-stat.i.metric.K/sec
100663 -3.8% 96871 perf-stat.i.minor-faults
100663 -3.8% 96871 perf-stat.i.page-faults
0.24 ± 3% -0.1 0.18 ± 3% perf-stat.overall.branch-miss-rate%
1.03 -2.7% 1.00 perf-stat.overall.cpi
0.97 +2.7% 1.00 perf-stat.overall.ipc
3.471e+10 +18.7% 4.121e+10 perf-stat.ps.branch-instructions
83783190 ± 3% -9.8% 75603241 ± 3% perf-stat.ps.branch-misses
3114 ± 2% +11.0% 3457 ± 10% perf-stat.ps.context-switches
1.866e+11 +2.7% 1.916e+11 perf-stat.ps.instructions
98965 -3.8% 95242 perf-stat.ps.minor-faults
98966 -3.8% 95242 perf-stat.ps.page-faults
1.139e+13 +2.6% 1.169e+13 perf-stat.total.instructions
4.88 ± 2% -0.3 4.62 perf-profile.calltrace.cycles-pp.entry_SYSCALL_64.llseek
4.94 ± 2% -0.2 4.74 perf-profile.calltrace.cycles-pp.vfs_write.ksys_write.do_syscall_64.entry_SYSCALL_64_after_hwframe.write
3.29 ± 2% -0.2 3.12 perf-profile.calltrace.cycles-pp.entry_SYSCALL_64.ioctl
3.26 -0.1 3.13 perf-profile.calltrace.cycles-pp.setfl.do_fcntl.__x64_sys_fcntl.do_syscall_64.entry_SYSCALL_64_after_hwframe
3.30 -0.1 3.17 perf-profile.calltrace.cycles-pp.entry_SYSCALL_64.fallocate64
2.48 -0.1 2.36 perf-profile.calltrace.cycles-pp.do_vfs_ioctl.__x64_sys_ioctl.do_syscall_64.entry_SYSCALL_64_after_hwframe.ioctl
2.34 ± 2% -0.1 2.21 perf-profile.calltrace.cycles-pp.do_fcntl.__x64_sys_fcntl.do_syscall_64.entry_SYSCALL_64_after_hwframe
2.12 -0.1 2.01 perf-profile.calltrace.cycles-pp.entry_SYSCALL_64
0.84 ± 2% -0.1 0.75 ± 2% perf-profile.calltrace.cycles-pp.syscall_exit_to_user_mode.do_syscall_64.entry_SYSCALL_64_after_hwframe
0.86 ± 2% -0.1 0.76 ± 2% perf-profile.calltrace.cycles-pp.syscall_exit_to_user_mode.do_syscall_64.entry_SYSCALL_64_after_hwframe.llseek
0.89 ± 3% -0.1 0.80 perf-profile.calltrace.cycles-pp.syscall_exit_to_user_mode.do_syscall_64.entry_SYSCALL_64_after_hwframe.llseek.stress_run
1.63 ± 2% -0.1 1.55 perf-profile.calltrace.cycles-pp.entry_SYSCALL_64.write
0.86 ± 3% -0.1 0.79 ± 2% perf-profile.calltrace.cycles-pp.syscall_exit_to_user_mode.do_syscall_64.entry_SYSCALL_64_after_hwframe.stress_run
2.40 ± 2% -0.1 2.33 perf-profile.calltrace.cycles-pp.do_fcntl.__x64_sys_fcntl.do_syscall_64.entry_SYSCALL_64_after_hwframe.stress_run
1.26 -0.1 1.20 perf-profile.calltrace.cycles-pp.__put_user_4.do_vfs_ioctl.__x64_sys_ioctl.do_syscall_64.entry_SYSCALL_64_after_hwframe
0.58 ± 3% -0.1 0.52 perf-profile.calltrace.cycles-pp.syscall_exit_to_user_mode.do_syscall_64.entry_SYSCALL_64_after_hwframe.ioctl
1.45 -0.1 1.40 perf-profile.calltrace.cycles-pp._raw_spin_lock.setfl.do_fcntl.__x64_sys_fcntl.do_syscall_64
0.55 +0.0 0.58 perf-profile.calltrace.cycles-pp.syscall_exit_to_user_mode.do_syscall_64.entry_SYSCALL_64_after_hwframe.fallocate64
0.86 ± 3% +0.1 0.91 ± 2% perf-profile.calltrace.cycles-pp.__fdget_raw.__x64_sys_fcntl.do_syscall_64.entry_SYSCALL_64_after_hwframe.stress_run
3.11 +0.1 3.19 perf-profile.calltrace.cycles-pp.__x64_sys_fallocate.do_syscall_64.entry_SYSCALL_64_after_hwframe.fallocate64
1.50 ± 2% +0.1 1.60 ± 2% perf-profile.calltrace.cycles-pp.entry_SYSCALL_64_after_hwframe.fdatasync
0.70 +0.1 0.83 perf-profile.calltrace.cycles-pp.__fdget.__x64_sys_fallocate.do_syscall_64.entry_SYSCALL_64_after_hwframe.fallocate64
1.15 ± 2% +0.1 1.29 ± 2% perf-profile.calltrace.cycles-pp.do_syscall_64.entry_SYSCALL_64_after_hwframe.fdatasync
1.41 ± 2% +0.1 1.55 ± 2% perf-profile.calltrace.cycles-pp.entry_SYSCALL_64_after_hwframe.fdatasync.stress_run
1.18 ± 2% +0.2 1.35 ± 2% perf-profile.calltrace.cycles-pp.do_syscall_64.entry_SYSCALL_64_after_hwframe.fdatasync.stress_run
3.90 ± 2% +0.2 4.08 ± 2% perf-profile.calltrace.cycles-pp.do_syscall_64.entry_SYSCALL_64_after_hwframe.write.stress_run
3.95 ± 2% +0.2 4.14 perf-profile.calltrace.cycles-pp.do_syscall_64.entry_SYSCALL_64_after_hwframe.ioctl
1.36 ± 2% +0.2 1.55 ± 2% perf-profile.calltrace.cycles-pp.__fdget.__x64_sys_ioctl.do_syscall_64.entry_SYSCALL_64_after_hwframe.ioctl
4.08 ± 2% +0.2 4.31 perf-profile.calltrace.cycles-pp.do_syscall_64.entry_SYSCALL_64_after_hwframe.llseek
4.66 ± 3% +0.3 4.91 perf-profile.calltrace.cycles-pp.entry_SYSCALL_64_after_hwframe.ioctl.stress_run
4.06 ± 3% +0.3 4.36 perf-profile.calltrace.cycles-pp.do_syscall_64.entry_SYSCALL_64_after_hwframe.ioctl.stress_run
4.58 +0.3 4.91 perf-profile.calltrace.cycles-pp.do_syscall_64.entry_SYSCALL_64_after_hwframe.fallocate64
5.07 +0.3 5.40 perf-profile.calltrace.cycles-pp.entry_SYSCALL_64_after_hwframe.fallocate64
4.20 ± 3% +0.3 4.54 ± 2% perf-profile.calltrace.cycles-pp.do_syscall_64.entry_SYSCALL_64_after_hwframe.llseek.stress_run
6.71 ± 2% +0.4 7.07 perf-profile.calltrace.cycles-pp.do_syscall_64.entry_SYSCALL_64_after_hwframe.stress_run
0.17 ±141% +0.4 0.58 ± 2% perf-profile.calltrace.cycles-pp.__x64_sys_fdatasync.do_syscall_64.entry_SYSCALL_64_after_hwframe.fdatasync.stress_run
0.00 +0.5 0.55 ± 2% perf-profile.calltrace.cycles-pp.__x64_sys_fdatasync.do_syscall_64.entry_SYSCALL_64_after_hwframe.fdatasync
8.22 -0.6 7.61 perf-profile.children.cycles-pp.syscall_exit_to_user_mode
16.53 -0.6 15.94 perf-profile.children.cycles-pp.entry_SYSCALL_64
16.36 -0.6 15.80 perf-profile.children.cycles-pp.entry_SYSRETQ_unsafe_stack
5.04 -0.2 4.83 perf-profile.children.cycles-pp.do_fcntl
5.14 ± 2% -0.2 4.95 perf-profile.children.cycles-pp.vfs_write
9.50 -0.2 9.31 perf-profile.children.cycles-pp.__x64_sys_fcntl
3.54 -0.1 3.40 perf-profile.children.cycles-pp.setfl
2.62 -0.1 2.48 perf-profile.children.cycles-pp.do_vfs_ioctl
2.56 -0.1 2.47 perf-profile.children.cycles-pp.stress_null
1.89 -0.1 1.80 perf-profile.children.cycles-pp.amd_clear_divider
1.74 -0.1 1.65 perf-profile.children.cycles-pp.__libc_fcntl64
1.38 -0.1 1.30 perf-profile.children.cycles-pp.__put_user_4
1.54 -0.1 1.49 perf-profile.children.cycles-pp._raw_spin_lock
0.44 ± 4% -0.1 0.39 perf-profile.children.cycles-pp.__munmap
0.42 ± 4% -0.1 0.37 perf-profile.children.cycles-pp.__vm_munmap
0.42 ± 4% -0.1 0.37 perf-profile.children.cycles-pp.__x64_sys_munmap
0.40 ± 4% -0.0 0.36 perf-profile.children.cycles-pp.do_vmi_align_munmap
2.46 -0.0 2.41 perf-profile.children.cycles-pp.syscall_exit_to_user_mode_prepare
0.42 ± 4% -0.0 0.38 perf-profile.children.cycles-pp.do_vmi_munmap
0.32 ± 4% -0.0 0.28 perf-profile.children.cycles-pp.unmap_region
0.24 ± 3% -0.0 0.22 ± 2% perf-profile.children.cycles-pp.asm_exc_page_fault
0.31 ± 3% -0.0 0.29 perf-profile.children.cycles-pp.__mmap
0.22 ± 3% -0.0 0.19 perf-profile.children.cycles-pp.do_user_addr_fault
0.55 -0.0 0.52 perf-profile.children.cycles-pp.fcntl64@plt
0.75 -0.0 0.72 perf-profile.children.cycles-pp.security_file_fcntl
0.29 ± 3% -0.0 0.27 perf-profile.children.cycles-pp.vm_mmap_pgoff
0.28 ± 3% -0.0 0.25 perf-profile.children.cycles-pp.do_mmap
0.22 ± 2% -0.0 0.20 ± 2% perf-profile.children.cycles-pp.exc_page_fault
0.20 ± 3% -0.0 0.18 ± 2% perf-profile.children.cycles-pp.mmap_region
0.56 -0.0 0.54 perf-profile.children.cycles-pp.null_lseek
0.53 -0.0 0.51 perf-profile.children.cycles-pp.security_file_ioctl
0.18 ± 3% -0.0 0.16 ± 2% perf-profile.children.cycles-pp.handle_mm_fault
0.15 ± 7% -0.0 0.13 ± 2% perf-profile.children.cycles-pp.tlb_finish_mmu
0.16 ± 3% -0.0 0.15 ± 3% perf-profile.children.cycles-pp.__handle_mm_fault
0.12 ± 6% -0.0 0.10 perf-profile.children.cycles-pp.__tlb_batch_free_encoded_pages
0.07 -0.0 0.06 perf-profile.children.cycles-pp.__anon_vma_prepare
3.28 +0.1 3.35 perf-profile.children.cycles-pp.__x64_sys_fallocate
7.43 +0.1 7.51 perf-profile.children.cycles-pp.fdatasync
4.15 +0.1 4.23 perf-profile.children.cycles-pp.syscall_return_via_sysret
1.07 +0.1 1.22 perf-profile.children.cycles-pp.__x64_sys_fdatasync
2.93 +0.4 3.35 ± 2% perf-profile.children.cycles-pp.__fdget
52.11 +1.6 53.71 perf-profile.children.cycles-pp.entry_SYSCALL_64_after_hwframe
47.02 +1.9 48.87 perf-profile.children.cycles-pp.do_syscall_64
0.00 +3.4 3.40 perf-profile.children.cycles-pp.x64_sys_call
8.38 -0.7 7.68 perf-profile.self.cycles-pp.do_syscall_64
15.83 -0.6 15.27 perf-profile.self.cycles-pp.entry_SYSRETQ_unsafe_stack
5.47 -0.3 5.20 perf-profile.self.cycles-pp.entry_SYSCALL_64_after_hwframe
5.17 -0.2 4.98 perf-profile.self.cycles-pp.entry_SYSCALL_64
4.64 -0.2 4.49 perf-profile.self.cycles-pp.llseek
4.24 -0.1 4.10 perf-profile.self.cycles-pp.ioctl
4.36 -0.1 4.22 perf-profile.self.cycles-pp.syscall_exit_to_user_mode
1.94 -0.1 1.84 perf-profile.self.cycles-pp.stress_null
2.02 -0.1 1.93 perf-profile.self.cycles-pp.fdatasync
2.18 -0.1 2.10 perf-profile.self.cycles-pp.fallocate64
2.01 -0.1 1.94 perf-profile.self.cycles-pp.setfl
1.33 -0.1 1.26 perf-profile.self.cycles-pp.__put_user_4
1.54 -0.1 1.47 perf-profile.self.cycles-pp.do_fcntl
1.19 -0.1 1.14 ± 2% perf-profile.self.cycles-pp.do_vfs_ioctl
1.34 -0.1 1.29 perf-profile.self.cycles-pp._raw_spin_lock
2.30 -0.0 2.26 perf-profile.self.cycles-pp.__x64_sys_fcntl
1.97 -0.0 1.93 perf-profile.self.cycles-pp.syscall_exit_to_user_mode_prepare
0.97 -0.0 0.94 perf-profile.self.cycles-pp.amd_clear_divider
0.56 -0.0 0.54 perf-profile.self.cycles-pp.security_file_fcntl
0.39 -0.0 0.37 perf-profile.self.cycles-pp.fcntl64@plt
0.30 -0.0 0.29 perf-profile.self.cycles-pp.rw_verify_area
0.36 -0.0 0.35 perf-profile.self.cycles-pp.security_file_ioctl
0.44 +0.0 0.48 ± 2% perf-profile.self.cycles-pp.__x64_sys_fallocate
0.34 +0.0 0.37 ± 6% perf-profile.self.cycles-pp.__x64_sys_fdatasync
4.14 +0.1 4.23 perf-profile.self.cycles-pp.syscall_return_via_sysret
1.57 +0.1 1.66 ± 2% perf-profile.self.cycles-pp.__fdget_raw
2.61 +0.4 3.06 ± 2% perf-profile.self.cycles-pp.__fdget
0.00 +2.9 2.89 perf-profile.self.cycles-pp.x64_sys_call
***************************************************************************************************
lkp-icl-2sp7: 64 threads 2 sockets Intel(R) Xeon(R) Gold 6346 CPU @ 3.10GHz (Ice Lake) with 256G memory
=========================================================================================
compiler/cpufreq_governor/kconfig/nr_threads/rootfs/tbox_group/test/testcase/testtime:
gcc-13/performance/x86_64-rhel-8.3/100%/debian-12-x86_64-20240206.cgz/lkp-icl-2sp7/monte-carlo/stress-ng/60s
commit:
0cd01ac5dc ("x86/bugs: Change commas to semicolons in 'spectre_v2' sysfs file")
1e3ad78334 ("x86/syscall: Don't force use of indirect calls for system calls")
0cd01ac5dcb1e18e 1e3ad78334a69b36e107232e337
---------------- ---------------------------
%stddev %change %stddev
\ | \
1.74 -0.1 1.62 perf-stat.overall.branch-miss-rate%
1.411e+13 +1.2% 1.427e+13 perf-stat.total.instructions
2838242 -1.6% 2793803 stress-ng.monte-carlo.samples/sec,_e_using_arc4
7122323 -1.2% 7036665 stress-ng.monte-carlo.samples/sec,_exp_using_arc4
3972723 -1.5% 3911813 stress-ng.monte-carlo.samples/sec,_pi_using_arc4
1.016e+08 -1.3% 1.004e+08 stress-ng.monte-carlo.samples/sec,_pi_using_lcg
6407021 -1.4% 6319313 stress-ng.monte-carlo.samples/sec,_sin_using_arc4
7374513 -1.3% 7277983 stress-ng.monte-carlo.samples/sec,_sqrt_using_arc4
3962914 -1.5% 3904274 stress-ng.monte-carlo.samples/sec,_squircle_using_arc4
1108 +1.8% 1128 stress-ng.time.system_time
3.02 -0.3 2.69 perf-profile.calltrace.cycles-pp.syscall_exit_to_user_mode.do_syscall_64.entry_SYSCALL_64_after_hwframe.__getpid.stress_mc_arc4_rand
3.40 ± 2% -0.2 3.16 ± 2% perf-profile.calltrace.cycles-pp.__x64_sys_getpid.do_syscall_64.entry_SYSCALL_64_after_hwframe.__getpid.stress_mc_arc4_rand
2.93 ± 3% -0.2 2.71 ± 3% perf-profile.calltrace.cycles-pp.__task_pid_nr_ns.__x64_sys_getpid.do_syscall_64.entry_SYSCALL_64_after_hwframe.__getpid
17.72 -0.2 17.52 perf-profile.calltrace.cycles-pp.entry_SYSCALL_64.__getpid.stress_mc_arc4_rand
0.94 -0.0 0.91 perf-profile.calltrace.cycles-pp.syscall_exit_to_user_mode_prepare.syscall_exit_to_user_mode.do_syscall_64.entry_SYSCALL_64_after_hwframe.__getpid
3.13 -0.0 3.10 perf-profile.calltrace.cycles-pp.stress_mc_mwc64_rand
2.07 -0.0 2.04 perf-profile.calltrace.cycles-pp.stress_mwc64.stress_mc_mwc64_rand
0.56 -0.0 0.53 perf-profile.calltrace.cycles-pp.stress_monte_carlo_sqrt.stress_mc_arc4_rand
43.17 +0.5 43.65 perf-profile.calltrace.cycles-pp.stress_mc_arc4_rand
34.06 +0.5 34.58 perf-profile.calltrace.cycles-pp.__getpid.stress_mc_arc4_rand
13.54 +0.8 14.33 perf-profile.calltrace.cycles-pp.entry_SYSCALL_64_after_hwframe.__getpid.stress_mc_arc4_rand
10.40 +1.0 11.40 perf-profile.calltrace.cycles-pp.do_syscall_64.entry_SYSCALL_64_after_hwframe.__getpid.stress_mc_arc4_rand
0.00 +1.4 1.38 perf-profile.calltrace.cycles-pp.x64_sys_call.do_syscall_64.entry_SYSCALL_64_after_hwframe.__getpid.stress_mc_arc4_rand
3.94 -0.4 3.58 perf-profile.children.cycles-pp.syscall_exit_to_user_mode
3.85 ± 2% -0.2 3.61 ± 2% perf-profile.children.cycles-pp.__x64_sys_getpid
3.15 ± 2% -0.2 2.93 ± 3% perf-profile.children.cycles-pp.__task_pid_nr_ns
7.88 -0.1 7.76 perf-profile.children.cycles-pp.entry_SYSRETQ_unsafe_stack
4.44 -0.1 4.37 perf-profile.children.cycles-pp.stress_mc_xorshift_rand
1.18 -0.1 1.13 perf-profile.children.cycles-pp.syscall_exit_to_user_mode_prepare
2.10 -0.0 2.06 perf-profile.children.cycles-pp.stress_monte_carlo_pi
2.38 -0.0 2.35 perf-profile.children.cycles-pp.stress_monte_carlo_sqrt
2.32 -0.0 2.29 perf-profile.children.cycles-pp.stress_mwc64
35.10 +0.6 35.66 perf-profile.children.cycles-pp.__getpid
27.59 +0.7 28.32 perf-profile.children.cycles-pp.entry_SYSCALL_64_after_hwframe
25.10 +0.7 25.84 perf-profile.children.cycles-pp.do_syscall_64
0.00 +1.6 1.61 perf-profile.children.cycles-pp.x64_sys_call
3.90 -0.2 3.68 perf-profile.self.cycles-pp.do_syscall_64
2.90 ± 2% -0.2 2.69 ± 3% perf-profile.self.cycles-pp.__task_pid_nr_ns
7.64 -0.1 7.52 perf-profile.self.cycles-pp.entry_SYSRETQ_unsafe_stack
2.08 -0.1 2.00 perf-profile.self.cycles-pp.syscall_exit_to_user_mode
0.95 -0.0 0.90 perf-profile.self.cycles-pp.syscall_exit_to_user_mode_prepare
2.76 -0.0 2.72 perf-profile.self.cycles-pp.stress_mc_xorshift_rand
1.64 -0.0 1.60 perf-profile.self.cycles-pp.stress_monte_carlo_pi
2.05 -0.0 2.02 perf-profile.self.cycles-pp.stress_mwc64
0.00 +1.4 1.37 perf-profile.self.cycles-pp.x64_sys_call
***************************************************************************************************
lkp-icl-2sp8: 64 threads 2 sockets Intel(R) Xeon(R) Gold 6346 CPU @ 3.10GHz (Ice Lake) with 256G memory
=========================================================================================
compiler/cpufreq_governor/disk/fs/kconfig/nr_threads/rootfs/tbox_group/test/testcase/testtime:
gcc-13/performance/1HDD/ext4/x86_64-rhel-8.3/100%/debian-12-x86_64-20240206.cgz/lkp-icl-2sp8/fpunch/stress-ng/60s
commit:
0cd01ac5dc ("x86/bugs: Change commas to semicolons in 'spectre_v2' sysfs file")
1e3ad78334 ("x86/syscall: Don't force use of indirect calls for system calls")
0cd01ac5dcb1e18e 1e3ad78334a69b36e107232e337
---------------- ---------------------------
%stddev %change %stddev
\ | \
4.408e+10 +4.9% 4.623e+10 perf-stat.i.branch-instructions
0.21 -0.0 0.19 ± 3% perf-stat.overall.branch-miss-rate%
4.336e+10 +4.9% 4.547e+10 perf-stat.ps.branch-instructions
1.054e+08 -1.6% 1.037e+08 stress-ng.fpunch.ops
1756286 -1.6% 1727644 stress-ng.fpunch.ops_per_sec
879217 -2.0% 861604 stress-ng.time.voluntary_context_switches
38.90 -0.6 38.29 perf-profile.calltrace.cycles-pp.vfs_write.__x64_sys_pwrite64.do_syscall_64.entry_SYSCALL_64_after_hwframe.__libc_pwrite
31.84 -0.5 31.30 perf-profile.calltrace.cycles-pp.generic_file_write_iter.vfs_write.__x64_sys_pwrite64.do_syscall_64.entry_SYSCALL_64_after_hwframe
40.48 -0.4 40.04 perf-profile.calltrace.cycles-pp.__x64_sys_pwrite64.do_syscall_64.entry_SYSCALL_64_after_hwframe.__libc_pwrite
19.84 -0.4 19.48 perf-profile.calltrace.cycles-pp.vfs_write.ksys_write.do_syscall_64.entry_SYSCALL_64_after_hwframe.write
22.29 -0.4 21.94 perf-profile.calltrace.cycles-pp.ksys_write.do_syscall_64.entry_SYSCALL_64_after_hwframe.write
16.32 -0.3 16.01 perf-profile.calltrace.cycles-pp.generic_file_write_iter.vfs_write.ksys_write.do_syscall_64.entry_SYSCALL_64_after_hwframe
26.13 -0.3 25.87 perf-profile.calltrace.cycles-pp.write
23.37 -0.3 23.11 perf-profile.calltrace.cycles-pp.entry_SYSCALL_64_after_hwframe.write
47.74 -0.2 47.50 perf-profile.calltrace.cycles-pp.__libc_pwrite
0.52 -0.2 0.34 ± 70% perf-profile.calltrace.cycles-pp.__mutex_unlock_slowpath.ksys_write.do_syscall_64.entry_SYSCALL_64_after_hwframe.write
2.06 -0.1 1.98 perf-profile.calltrace.cycles-pp.up_write.generic_file_write_iter.vfs_write.__x64_sys_pwrite64.do_syscall_64
1.33 -0.1 1.28 perf-profile.calltrace.cycles-pp.rwsem_wake.up_write.generic_file_write_iter.vfs_write.__x64_sys_pwrite64
0.64 ± 2% -0.1 0.59 perf-profile.calltrace.cycles-pp.syscall_exit_to_user_mode.do_syscall_64.entry_SYSCALL_64_after_hwframe.__libc_pwrite
2.62 -0.0 2.58 perf-profile.calltrace.cycles-pp.simple_write_end.generic_perform_write.generic_file_write_iter.vfs_write.__x64_sys_pwrite64
1.02 -0.0 0.99 perf-profile.calltrace.cycles-pp.up_write.generic_file_write_iter.vfs_write.ksys_write.do_syscall_64
0.66 -0.0 0.64 perf-profile.calltrace.cycles-pp.rwsem_wake.up_write.generic_file_write_iter.vfs_write.ksys_write
1.48 -0.0 1.46 perf-profile.calltrace.cycles-pp.simple_write_end.generic_perform_write.generic_file_write_iter.vfs_write.ksys_write
0.66 -0.0 0.64 perf-profile.calltrace.cycles-pp.security_file_permission.rw_verify_area.vfs_write.ksys_write.do_syscall_64
1.06 +0.0 1.08 perf-profile.calltrace.cycles-pp.vfs_fallocate.__x64_sys_fallocate.do_syscall_64.entry_SYSCALL_64_after_hwframe.syscall
0.83 ± 3% +0.1 0.91 perf-profile.calltrace.cycles-pp.__fdget.__x64_sys_pwrite64.do_syscall_64.entry_SYSCALL_64_after_hwframe.__libc_pwrite
1.60 +0.1 1.71 perf-profile.calltrace.cycles-pp.__x64_sys_fallocate.do_syscall_64.entry_SYSCALL_64_after_hwframe.syscall
0.71 ± 2% +0.1 0.82 perf-profile.calltrace.cycles-pp.__fdget.__x64_sys_fallocate.do_syscall_64.entry_SYSCALL_64_after_hwframe.fallocate64
3.00 +0.2 3.18 perf-profile.calltrace.cycles-pp.__x64_sys_fallocate.do_syscall_64.entry_SYSCALL_64_after_hwframe.fallocate64
5.63 +0.2 5.85 perf-profile.calltrace.cycles-pp.syscall
2.37 +0.2 2.60 perf-profile.calltrace.cycles-pp.do_syscall_64.entry_SYSCALL_64_after_hwframe.syscall
2.65 +0.2 2.89 perf-profile.calltrace.cycles-pp.entry_SYSCALL_64_after_hwframe.syscall
10.09 +0.3 10.44 perf-profile.calltrace.cycles-pp.fallocate64
4.37 +0.4 4.74 perf-profile.calltrace.cycles-pp.do_syscall_64.entry_SYSCALL_64_after_hwframe.fallocate64
4.84 +0.4 5.21 perf-profile.calltrace.cycles-pp.entry_SYSCALL_64_after_hwframe.fallocate64
59.21 -1.0 58.23 perf-profile.children.cycles-pp.vfs_write
48.48 -0.9 47.62 perf-profile.children.cycles-pp.generic_file_write_iter
40.60 -0.4 40.17 perf-profile.children.cycles-pp.__x64_sys_pwrite64
22.42 -0.4 22.06 perf-profile.children.cycles-pp.ksys_write
26.21 -0.3 25.96 perf-profile.children.cycles-pp.write
47.88 -0.2 47.65 perf-profile.children.cycles-pp.__libc_pwrite
3.21 -0.1 3.10 perf-profile.children.cycles-pp.up_write
2.62 -0.1 2.52 perf-profile.children.cycles-pp.syscall_exit_to_user_mode
2.07 -0.1 2.00 perf-profile.children.cycles-pp.rwsem_wake
4.34 -0.1 4.27 perf-profile.children.cycles-pp.simple_write_end
1.28 -0.0 1.24 perf-profile.children.cycles-pp.wake_up_q
0.69 -0.0 0.66 perf-profile.children.cycles-pp.wake_q_add
1.06 -0.0 1.03 ± 2% perf-profile.children.cycles-pp.__mutex_unlock_slowpath
0.84 ± 2% -0.0 0.81 perf-profile.children.cycles-pp.syscall_exit_to_user_mode_prepare
0.76 -0.0 0.73 perf-profile.children.cycles-pp._raw_spin_lock_irqsave
0.65 -0.0 0.62 perf-profile.children.cycles-pp.rwsem_mark_wake
0.81 -0.0 0.79 perf-profile.children.cycles-pp.try_to_wake_up
5.70 +0.2 5.92 perf-profile.children.cycles-pp.syscall
2.03 ± 2% +0.3 2.29 perf-profile.children.cycles-pp.__fdget
4.83 +0.3 5.10 perf-profile.children.cycles-pp.__x64_sys_fallocate
10.18 +0.3 10.52 perf-profile.children.cycles-pp.fallocate64
0.00 +1.1 1.12 perf-profile.children.cycles-pp.x64_sys_call
2.68 -0.1 2.55 perf-profile.self.cycles-pp.do_syscall_64
4.24 -0.1 4.13 perf-profile.self.cycles-pp.fault_in_readable
2.04 -0.0 1.99 perf-profile.self.cycles-pp.simple_write_end
4.80 -0.0 4.76 perf-profile.self.cycles-pp.vfs_write
1.67 -0.0 1.64 perf-profile.self.cycles-pp.entry_SYSCALL_64_after_hwframe
0.66 ± 2% -0.0 0.63 perf-profile.self.cycles-pp.wake_q_add
0.72 -0.0 0.70 perf-profile.self.cycles-pp._raw_spin_lock_irqsave
0.68 ± 3% -0.0 0.66 ± 2% perf-profile.self.cycles-pp.syscall_exit_to_user_mode_prepare
0.50 -0.0 0.48 perf-profile.self.cycles-pp.wake_up_q
0.59 +0.1 0.66 perf-profile.self.cycles-pp.__x64_sys_fallocate
0.96 +0.1 1.05 perf-profile.self.cycles-pp.__fdget_pos
0.57 +0.1 0.68 perf-profile.self.cycles-pp.__x64_sys_pwrite64
1.87 ± 2% +0.3 2.14 perf-profile.self.cycles-pp.__fdget
0.00 +1.0 0.96 perf-profile.self.cycles-pp.x64_sys_call
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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