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Date: Fri, 14 Sep 2018 17:01:18 +0800
From: kernel test robot <rong.a.chen@...el.com>
To: Juergen Gross <jgross@...e.com>
Cc: Thomas Gleixner <tglx@...utronix.de>,
Boris Ostrovsky <boris.ostrovsky@...cle.com>,
LKML <linux-kernel@...r.kernel.org>,
Stephen Rothwell <sfr@...b.auug.org.au>, lkp@...org
Subject: [LKP] [x86/xen] f030aade91: will-it-scale.per_process_ops 5.6%
improvement
Greeting,
FYI, we noticed a 5.6% improvement of will-it-scale.per_process_ops due to commit:
commit: f030aade9165080f3539fb86fc2ce9ffc391813c ("x86/xen: Move pv specific parts of arch/x86/xen/mmu.c to mmu_pv.c")
https://git.kernel.org/cgit/linux/kernel/git/next/linux-next.git master
in testcase: will-it-scale
on test machine: 8 threads Ivy Bridge with 16G memory
with following parameters:
nr_task: 100%
mode: process
test: poll2
ucode: 0x20
cpufreq_governor: performance
test-description: Will It Scale takes a testcase and runs it from 1 through to n parallel copies to see if the testcase will scale. It builds both a process and threads based test in order to see any differences between the two.
test-url: https://github.com/antonblanchard/will-it-scale
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
=========================================================================================
compiler/cpufreq_governor/kconfig/mode/nr_task/rootfs/tbox_group/test/testcase/ucode:
gcc-7/performance/x86_64-rhel-7.2/process/100%/debian-x86_64-2018-04-03.cgz/lkp-ivb-d01/poll2/will-it-scale/0x20
commit:
28c11b0f79 ("x86/xen: Move pv irq related functions under CONFIG_XEN_PV umbrella")
f030aade91 ("x86/xen: Move pv specific parts of arch/x86/xen/mmu.c to mmu_pv.c")
28c11b0f798c6727 f030aade9165080f3539fb86fc
---------------- --------------------------
fail:runs %reproduction fail:runs
| | |
:4 25% 1:4 dmesg.RIP:__do_page_fault
1:4 -25% :4 dmesg.RIP:__pte_alloc
:4 25% 1:4 dmesg.RIP:skb_copy_datagram_iter
1:4 -25% :4 kmsg.c91>]usb_hcd_irq
1:4 -25% :4 kmsg.d7641b>]usb_hcd_irq
:4 25% 1:4 kmsg.dea1619>]usb_hcd_irq
:4 25% 1:4 kmsg.ef1c654>]usb_hcd_irq
1:4 -25% :4 kmsg.effc28>]usb_hcd_irq
:4 25% 1:4 kmsg.f222649>]usb_hcd_irq
:4 25% 1:4 kmsg.f7cf435>]usb_hcd_irq
0:4 0% 0:4 perf-profile.children.cycles-pp.poll_select_set_timeout
0:4 0% 0:4 perf-profile.self.cycles-pp.poll_select_set_timeout
%stddev %change %stddev
\ | \
401137 +5.6% 423557 will-it-scale.per_process_ops
3209103 +5.6% 3388457 will-it-scale.workload
5.70 -1.7% 5.61 boot-time.dhcp
0.00 ± 17% -0.0 0.00 ± 38% mpstat.cpu.soft%
3839 ± 90% +304.9% 15546 ± 55% cpuidle.C3.usage
7549 ± 3% +124.5% 16951 ± 51% cpuidle.C6.usage
0.82 -7.4% 0.76 ± 2% perf-stat.cpi
8419 +7.3% 9036 ± 4% perf-stat.instructions-per-iTLB-miss
1.21 +8.0% 1.31 ± 2% perf-stat.ipc
42479 ± 6% +10.9% 47103 ± 5% sched_debug.cfs_rq:/.load.stddev
731344 ± 12% -32.9% 490912 ± 10% sched_debug.cpu.avg_idle.avg
42994 ± 6% +9.8% 47202 ± 5% sched_debug.cpu.load.stddev
3830 ± 91% +305.6% 15535 ± 55% turbostat.C3
7544 ± 3% +124.6% 16944 ± 51% turbostat.C6
0.08 ±101% +500.0% 0.51 ± 61% turbostat.CPU%c3
46.98 +1.6% 47.76 turbostat.CorWatt
0.02 ±100% +1375.0% 0.29 ± 80% turbostat.Pkg%pc3
51.87 +1.5% 52.65 turbostat.PkgWatt
46.78 -4.4 42.40 perf-profile.calltrace.cycles-pp.__fget_light.do_sys_poll.__x64_sys_poll.do_syscall_64.entry_SYSCALL_64_after_hwframe
86.64 -0.9 85.77 perf-profile.calltrace.cycles-pp.do_sys_poll.__x64_sys_poll.do_syscall_64.entry_SYSCALL_64_after_hwframe
89.84 -0.7 89.16 perf-profile.calltrace.cycles-pp.__x64_sys_poll.do_syscall_64.entry_SYSCALL_64_after_hwframe
91.35 -0.6 90.75 perf-profile.calltrace.cycles-pp.do_syscall_64.entry_SYSCALL_64_after_hwframe
91.68 -0.6 91.12 perf-profile.calltrace.cycles-pp.entry_SYSCALL_64_after_hwframe
0.70 ± 5% +0.1 0.77 ± 4% perf-profile.calltrace.cycles-pp.__might_fault._copy_from_user.do_sys_poll.__x64_sys_poll.do_syscall_64
3.27 ± 2% +0.2 3.43 ± 3% perf-profile.calltrace.cycles-pp.copy_user_enhanced_fast_string._copy_from_user.do_sys_poll.__x64_sys_poll.do_syscall_64
3.66 +0.2 3.87 perf-profile.calltrace.cycles-pp.__entry_SYSCALL_64_trampoline
3.67 +0.3 3.94 perf-profile.calltrace.cycles-pp.syscall_return_via_sysret
4.25 ± 2% +0.3 4.52 ± 2% perf-profile.calltrace.cycles-pp._copy_from_user.do_sys_poll.__x64_sys_poll.do_syscall_64.entry_SYSCALL_64_after_hwframe
44.61 -4.6 39.99 perf-profile.children.cycles-pp.__fget_light
89.08 -0.7 88.36 perf-profile.children.cycles-pp.do_sys_poll
89.92 -0.7 89.23 perf-profile.children.cycles-pp.__x64_sys_poll
91.42 -0.6 90.82 perf-profile.children.cycles-pp.do_syscall_64
91.76 -0.5 91.21 perf-profile.children.cycles-pp.entry_SYSCALL_64_after_hwframe
3.29 ± 2% +0.2 3.45 ± 3% perf-profile.children.cycles-pp.copy_user_enhanced_fast_string
3.75 +0.2 3.95 perf-profile.children.cycles-pp.__entry_SYSCALL_64_trampoline
4.32 ± 2% +0.3 4.59 perf-profile.children.cycles-pp._copy_from_user
4.18 +0.3 4.48 perf-profile.children.cycles-pp.syscall_return_via_sysret
4.54 ± 2% +0.4 4.94 perf-profile.children.cycles-pp.__fdget
42.30 -4.9 37.43 perf-profile.self.cycles-pp.__fget_light
0.42 ± 4% +0.0 0.46 ± 4% perf-profile.self.cycles-pp.___might_sleep
0.35 +0.1 0.42 ± 3% perf-profile.self.cycles-pp.entry_SYSCALL_64_after_hwframe
3.24 ± 2% +0.2 3.40 ± 3% perf-profile.self.cycles-pp.copy_user_enhanced_fast_string
3.75 +0.2 3.95 perf-profile.self.cycles-pp.__entry_SYSCALL_64_trampoline
2.24 +0.3 2.50 ± 3% perf-profile.self.cycles-pp.__fdget
4.17 ± 2% +0.3 4.47 perf-profile.self.cycles-pp.syscall_return_via_sysret
36.22 +3.5 39.71 perf-profile.self.cycles-pp.do_sys_poll
will-it-scale.per_process_ops
440000 +-+----------------------------------------------------------------+
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430000 +-+ O O O O O O |
420000 O-+O O O O O O O O O O O O O O O O
| O O O O |
410000 +-+ |
| .+. +.+.. + |
400000 +-+ .+.. .+.. .+..+. +.. : + |
|..+ + + +.+ + : + |
390000 +-+ : :: : |
380000 +-+ : : : : |
| : : : : |
370000 +-+ : : : |
| + + |
360000 +-+----------------------------------------------------------------+
[*] 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,
Rong, Chen
View attachment "config-4.19.0-rc2-00006-gf030aad" of type "text/plain" (167672 bytes)
View attachment "job-script" of type "text/plain" (6990 bytes)
View attachment "job.yaml" of type "text/plain" (4609 bytes)
View attachment "reproduce" of type "text/plain" (308 bytes)
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