Messages in this thread |  | | Date | Tue, 17 Feb 2015 09:09:47 -0700 | From | David Ahern <> | Subject | Re: [PATCH 0/7] [RFC] kernel: add a netlink interface to get information about processes |
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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
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% ...
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