From: Eric Dumazet <eric.dumazet@gmail.com>
To: Davide Libenzi <davidel@xmailserver.org>
Cc: Simon Kirby <sim@hostway.ca>,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
Shawn Bohrer <shawn.bohrer@gmail.com>,
Andrew Morton <akpm@linux-foundation.org>
Subject: Re: sys_epoll_wait high CPU load in 2.6.37
Date: Wed, 26 Jan 2011 16:59:50 +0100 [thread overview]
Message-ID: <1296057590.2899.73.camel@edumazet-laptop> (raw)
In-Reply-To: <alpine.DEB.2.00.1101260747320.1889@localhost6.localdomain6>
Le mercredi 26 janvier 2011 à 07:52 -0800, Davide Libenzi a écrit :
> For "above", I meant the current epoll expire time calculation, which was
> described above in the message ;)
Well, problem was not an overflow, but doing a loop 2.000.000 times ;)
> The hint for a timespec_add_ms() was because we must be doing something
> similar in poll, don't we (/me got no code in front ATM)?
Apparently its done differently in poll(), using
poll_select_set_timeout() helper.
Give me some minutes I'll try to cook an alternate patch
next prev parent reply other threads:[~2011-01-26 15:59 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-01-26 0:09 Simon Kirby
2011-01-26 7:18 ` Eric Dumazet
2011-01-26 11:16 ` Eric Dumazet
2011-01-26 15:31 ` Davide Libenzi
2011-01-26 15:43 ` Eric Dumazet
2011-01-26 15:52 ` Davide Libenzi
2011-01-26 15:59 ` Eric Dumazet [this message]
2011-01-26 16:13 ` Eric Dumazet
2011-01-26 17:20 ` Shawn Bohrer
2011-01-26 17:51 ` Eric Dumazet
2011-01-26 18:06 ` Davide Libenzi
2011-01-26 18:18 ` Eric Dumazet
2011-01-26 18:45 ` Eric Dumazet
2011-01-28 0:17 ` Davide Libenzi
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