From: Andrew Vagin <avagin@parallels.com>
To: David Ahern <dsahern@gmail.com>
Cc: Andrey Vagin <avagin@openvz.org>, <linux-kernel@vger.kernel.org>,
<linux-api@vger.kernel.org>, Oleg Nesterov <oleg@redhat.com>,
Andrew Morton <akpm@linux-foundation.org>,
Cyrill Gorcunov <gorcunov@openvz.org>,
Pavel Emelyanov <xemul@parallels.com>,
Roger Luethi <rl@hellgate.ch>
Subject: Re: [PATCH 0/7] [RFC] kernel: add a netlink interface to get information about processes
Date: Tue, 17 Feb 2015 23:32:02 +0300 [thread overview]
Message-ID: <20150217203202.GA7091@paralelels.com> (raw)
In-Reply-To: <54E367CB.9030309@gmail.com>
On Tue, Feb 17, 2015 at 09:09:47AM -0700, David Ahern wrote:
> On 2/17/15 1:20 AM, Andrey Vagin wrote:
> >And here are statistics about syscalls which were called by each
> >command.
> >$ perf stat -e syscalls:sys_exit* -- ps ax -o pid,ppid 2>&1 | grep syscalls | sort -n -r | head -n 5
> > 20,713 syscalls:sys_exit_open
> > 20,710 syscalls:sys_exit_close
> > 20,708 syscalls:sys_exit_read
> > 10,348 syscalls:sys_exit_newstat
> > 31 syscalls:sys_exit_write
> >
> >$ perf stat -e syscalls:sys_exit* -- ./task_diag_all 2>&1 | grep syscalls | sort -n -r | head -n 5
> > 114 syscalls:sys_exit_recvfrom
> > 49 syscalls:sys_exit_write
> > 8 syscalls:sys_exit_mmap
> > 4 syscalls:sys_exit_mprotect
> > 3 syscalls:sys_exit_newfstat
>
> 'perf trace -s' gives the summary with stats.
> e.g., perf trace -s -- ps ax -o pid,ppid
Thank you for this command, I haven't used it before.
ps (21301), 145271 events, 100.0%, 0.000 msec
syscall calls min avg max stddev
(msec) (msec) (msec) (%)
--------------- -------- --------- --------- --------- ------
read 20717 0.000 0.020 1.631 0.64%
write 1 0.019 0.019 0.019 0.00%
open 20722 0.025 0.035 3.624 0.93%
close 20719 0.006 0.009 1.059 0.95%
stat 10352 0.015 0.025 1.748 0.95%
fstat 12 0.010 0.012 0.020 6.17%
lseek 2 0.011 0.012 0.012 3.08%
mmap 30 0.012 0.034 0.094 9.35%
mprotect 17 0.034 0.045 0.067 4.86%
munmap 3 0.028 0.058 0.108 44.12%
brk 4 0.011 0.015 0.019 11.24%
rt_sigaction 25 0.011 0.011 0.014 1.27%
rt_sigprocmask 1 0.012 0.012 0.012 0.00%
ioctl 4 0.010 0.012 0.014 6.94%
access 1 0.034 0.034 0.034 0.00%
execve 6 0.000 0.496 2.794 92.58%
uname 1 0.015 0.015 0.015 0.00%
getdents 12 0.019 0.691 1.158 13.04%
getrlimit 1 0.012 0.012 0.012 0.00%
geteuid 1 0.012 0.012 0.012 0.00%
arch_prctl 1 0.013 0.013 0.013 0.00%
futex 1 0.020 0.020 0.020 0.00%
set_tid_address 1 0.012 0.012 0.012 0.00%
openat 1 0.030 0.030 0.030 0.00%
set_robust_list 1 0.011 0.011 0.011 0.00%
task_diag_all (21304), 569 events, 98.6%, 0.000 msec
syscall calls min avg max stddev
(msec) (msec) (msec) (%)
--------------- -------- --------- --------- --------- ------
read 2 0.000 0.045 0.090 100.00%
write 77 0.010 0.013 0.083 7.93%
open 2 0.031 0.038 0.045 19.64%
close 3 0.010 0.014 0.017 13.43%
fstat 3 0.011 0.011 0.012 3.79%
mmap 8 0.013 0.027 0.049 16.72%
mprotect 4 0.034 0.043 0.052 8.86%
munmap 1 0.031 0.031 0.031 0.00%
brk 1 0.014 0.014 0.014 0.00%
ioctl 1 0.010 0.010 0.010 0.00%
access 1 0.030 0.030 0.030 0.00%
getpid 1 0.011 0.011 0.011 0.00%
socket 1 0.045 0.045 0.045 0.00%
sendto 2 0.091 0.104 0.117 12.63%
recvfrom 175 0.026 0.093 0.141 1.10%
bind 1 0.014 0.014 0.014 0.00%
execve 1 0.000 0.000 0.000 0.00%
arch_prctl 1 0.011 0.011 0.011 0.00%
>
> ps (23850), 3117 events, 99.3%, 0.000 msec
>
> syscall calls min avg max stddev
> (msec) (msec) (msec) (%)
> --------------- -------- --------- --------- --------- ------
> read 353 0.000 0.010 0.035 3.14%
> write 166 0.006 0.012 0.045 3.03%
> open 365 0.002 0.005 0.178 11.29%
> close 354 0.001 0.002 0.024 3.57%
> stat 170 0.002 0.007 0.662 52.99%
> fstat 19 0.002 0.003 0.003 2.31%
> lseek 2 0.003 0.003 0.003 6.49%
> mmap 50 0.004 0.006 0.013 3.40%
> ...
next prev parent reply other threads:[~2015-02-17 20:32 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-02-17 8:20 [PATCH 0/7] [RFC] kernel: add a netlink interface to get information about processes Andrey Vagin
2015-02-17 8:20 ` [PATCH 1/7] kernel: add a netlink interface to get information about tasks Andrey Vagin
2015-02-17 8:20 ` [PATCH 2/7] kernel: move next_tgid from fs/proc Andrey Vagin
2015-02-17 8:20 ` [PATCH 3/7] task-diag: add ability to get information about all tasks Andrey Vagin
2015-02-17 8:20 ` [PATCH 4/7] task-diag: add a new group to get process credentials Andrey Vagin
2015-02-17 8:20 ` [PATCH 5/7] kernel: add ability to iterate children of a specified task Andrey Vagin
2015-02-17 8:20 ` [PATCH 6/7] task_diag: add ability to dump children Andrey Vagin
2015-02-17 8:20 ` [PATCH 7/7] selftest: check the task_diag functinonality Andrey Vagin
2015-02-17 8:53 ` [PATCH 0/7] [RFC] kernel: add a netlink interface to get information about processes Arnd Bergmann
2015-02-17 21:33 ` Andrew Vagin
2015-02-18 11:06 ` Arnd Bergmann
2015-02-18 12:42 ` Andrew Vagin
2015-02-18 14:46 ` Arnd Bergmann
2015-02-19 14:04 ` Andrew Vagin
2015-02-17 16:09 ` David Ahern
2015-02-17 20:32 ` Andrew Vagin [this message]
2015-02-17 19:05 ` Andy Lutomirski
2015-02-18 14:27 ` Andrew Vagin
2015-02-19 1:18 ` Andy Lutomirski
2015-02-19 21:39 ` Andrew Vagin
2015-02-20 20:33 ` Andy Lutomirski
-- strict thread matches above, loose matches on Subject: below --
2015-02-19 12:50 Pavel Odintsov
2015-02-19 13:00 Pavel Odintsov
2015-02-27 20:43 ` Arnaldo Carvalho de Melo
2015-02-27 20:54 ` David Ahern
2015-02-27 21:50 ` Arnaldo Carvalho de Melo
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20150217203202.GA7091@paralelels.com \
--to=avagin@parallels.com \
--cc=akpm@linux-foundation.org \
--cc=avagin@openvz.org \
--cc=dsahern@gmail.com \
--cc=gorcunov@openvz.org \
--cc=linux-api@vger.kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=oleg@redhat.com \
--cc=rl@hellgate.ch \
--cc=xemul@parallels.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox