Re: [GIT PULL] tracing: Syscalls trace events + perf support
From: Ingo Molnar
Date: Wed Aug 12 2009 - 07:03:36 EST
one thing i noticed is that we dont seem to be catching
compat syscalls properly:
phoenix:~/linux/linux/tools/perf> perf stat -e
syscalls:sys_enter_read -e syscalls:sys_enter_write -e
syscalls:sys_enter_mmap ~/hackbench 10
Time: 0.236
Performance counter stats for '/home/mingo/hackbench 10':
0 syscalls:sys_enter_read
0 syscalls:sys_enter_write
0 syscalls:sys_enter_mmap
0.270062020 seconds time elapsed
phoenix:~/linux/linux/tools/perf> file ~/hackbench
/home/mingo/hackbench: ELF 32-bit LSB executable, Intel
80386, version 1 (SYSV), dynamically linked (uses shared
libs), for GNU/Linux 2.2.5, not stripped
phoenix:~/linux/linux/tools/perf> uname -a
Linux phoenix 2.6.31-rc5-tip #3 SMP Wed Aug 12 12:50:38 CEST
2009 x86_64 x86_64 x86_64 GNU/Linux
phoenix:~> perf stat -e syscalls:sys_enter_read -e
syscalls:sys_enter_write -e syscalls:sys_enter_mmap
~/hackbench64 10
Running with 10*40 (== 400) tasks.
Time: 0.199
Performance counter stats for '/home/mingo/hackbench64 10':
400402 syscalls:sys_enter_read
400403 syscalls:sys_enter_write
12 syscalls:sys_enter_mmap
0.247919263 seconds time elapsed
phoenix:~> file hackbench64
hackbench64: ELF 64-bit LSB executable, x86-64, version 1
(SYSV), dynamically linked (uses shared libs), for GNU/Linux
2.6.9, not stripped
Ingo
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