Messages in this thread | | | Date | Thu, 23 Aug 2012 11:01:55 +0900 | From | Masami Hiramatsu <> | Subject | Re: [PATCH 2/5] trace-cmd: Use tracing directory to count CPUs |
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(2012/08/22 22:41), Steven Rostedt wrote: > On Wed, 2012-08-22 at 17:43 +0900, Yoshihiro YUNOMAE wrote: >> From: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com> >> >> Count debugfs/tracing/per_cpu/cpu* to determine the >> number of CPUs. > > I'm curious, do you find that sysconf doesn't return the # of CPUs the > system has?
No, sysconf returns the number of hosts CPUs, not guests.
> I've had boxes where the per_cpu/cpu* had more cpus than the > box actually holds. But this was a bug in the kernel, not the tool. This > change log needs to have rational instead of just explaining what the > patch does.
Ah, I see. Hmm, then this should be enabled by a command line option or an environment variable.
Thank you,
-- Masami HIRAMATSU Software Platform Research Dept. Linux Technology Center Hitachi, Ltd., Yokohama Research Laboratory E-mail: masami.hiramatsu.pt@hitachi.com
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