Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]

Groups > linux.kernel > #1185150 > unrolled thread

Re: CONFIG_NO_HZ_FULL restricts cpu usage to the equivalent of one in 4.2

Back to article view | Back to linux.kernel

This discussion starts older than the indexed window; earlier articles aren't shown. The article labeled Started by below is the oldest one visible, not the original post.

Contents

  Re: CONFIG_NO_HZ_FULL restricts cpu usage to the equivalent of one  in 4.2 Ken Moffat <zarniwhoop@ntlworld.com> - 2015-07-16 02:40 +0200

#1185150 — Re: CONFIG_NO_HZ_FULL restricts cpu usage to the equivalent of one in 4.2

On Wed, Jul 15, 2015 at 12:05:05PM -0700, Andy Lutomirski wrote:
> 
> Before going nuts bisecting, it could be worth running perf record -a -g -e
> cycles (or perhaps -e task-clock instead of -e cycles).  It could also be
> worth manually sampling /proc/PID/stack a few times for a process that isn't
> making as much progress as it should.
> 
> --Andy

I think Frederic has already spotted the problem - in the early
bisects, everything was building on CPU 0.  But thanks for the
suggestion.

ĸen
-- 
This one goes up to eleven!
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/

[toc] | [standalone]

Back to top | Article view | linux.kernel

csiph-web