Re: [GIT PULL] tracing: Syscalls trace events + perf support

[Ingo Molnar <mingo@elte.hu>]

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