linux-kernel - Re: loaded router, excessive getnstimeofday in oprofile

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Message-Id: <200808261329.53741.denys@visp.net.lb>
Date:	Tue, 26 Aug 2008 13:29:53 +0300
From:	Denys Fedoryshchenko <denys@...p.net.lb>
To:	Jarek Poplawski <jarkao2@...il.com>
Cc:	netdev@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: loaded router, excessive getnstimeofday in oprofile

On Tuesday 26 August 2008, Jarek Poplawski wrote:
>
> This function is really used in many places, and these profiles are
> not enough at least to me, but it seems you could have a lot of
> softirqs (and probably hrtimers) scheduling, so maybe you should try
> if e.g. disabling hrtimers or changing kernel HZ makes any difference.
>
> Jarek P.
One user is shapers, it is ok for me.
I am not sure, but maybe another user is softlockup debug option... and if 
there is a lot of task switches maybe it will cause excessive load of timers 
slow?

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