Instrumenting context-switching

[Masami Hiramatsu]

Mike Mason wrote:
> What kernel version are you using?  If your using 2.6.24-rc1 then kernel markers are available.
>  You can place a static marker (as shown in the patch below), rebuild and reboot the kernel, 
> then access the probe point via a SystemTap script (as shown in the script below the patch).

FYI, from 2.6.24-rc1, you can instrument kprobe on __switch_to even if it runs on x86-64,
because the kretprobe-blacklist is merged.

Thanks,

-- 
Masami Hiramatsu

Software Engineer
Hitachi Computer Products (America) Inc.
Software Solutions Division

e-mail: mhiramat@redhat.com, masami.hiramatsu.pt@hitachi.com