(2012/08/23 11:01), Masami Hiramatsu wrote: > (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...@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.
Oops, I misunderstood. I'll add more comment for why this should be tried instead of sysconf. Thank you, -- Masami HIRAMATSU Software Platform Research Dept. Linux Technology Center Hitachi, Ltd., Yokohama Research Laboratory E-mail: masami.hiramatsu...@hitachi.com
