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From: Mark Hahn <hahn@coffee.psychology.mcmaster.ca>
To: linux-mm@kvack.org
Subject: Re: too many context switches.
Date: Mon, 16 Oct 2000 20:23:55 -0400 (EDT)	[thread overview]
Message-ID: <Pine.LNX.4.10.10010162020200.15363-100000@coffee.psychology.mcmaster.ca> (raw)
In-Reply-To: <Pine.LNX.4.10.10010081444380.26729-100000@coffee.psychology.mcmaster.ca>

I'm following up to my earlier message, where I pointed out
that current kernels generate a RIDICULOUS number of context
switches when streaming to disk.  I've tracked this down a little
and the problem is that bdflush is being awoken sometimes 
30-40000 times per second.  this is obviously not a good thing!

I haven't figured out why, but the bdflush loop is very odd
looking, since it contains a schedule() but no wait_on.  could 
someone explain how it's supposed to be throttled?

thanks, mark hahn.

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      reply	other threads:[~2000-10-17  0:23 UTC|newest]

Thread overview: 2+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2000-10-08 20:19 Mark Hahn
2000-10-17  0:23 ` Mark Hahn [this message]

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