Re: Interrupt latency problems

From: Bosko Milekic <bmilekic_at_unixdaemons.com>
Date: Sat, 10 May 2003 09:02:15 -0400
On Sat, May 10, 2003 at 01:37:27PM +0100, Paul Richards wrote:
> I'm having real problems with current with heavy disk activity.
> 
> When working in X and updating ports which causes a lot of disk activity
> I get *very* poor interactive responses. Keypresses can not appear for
> seconds and mouse movement is very jerky and unresponsive.
> 
> I'm wondering if something is holding locks a long time in interrupt
> handlers and causing mouse/keyboard interrupts to be lost?
> 
> Since this is caused by heavy disk activity then my first guess would be
> the ATA driver.
> 
> Is anyone else seeing anything like this?
> 
> -- 
> Paul Richards <paul_at_freebsd-services.com>
> FreeBSD Services Ltd

  What scheduler are you running with?  Try switching ULE <-> 4BSD and
  see if it changes anything.

-- 
Bosko Milekic
bmilekic_at_unixdaemons.com
bmilekic_at_FreeBSD.org
Received on Sat May 10 2003 - 04:03:41 UTC

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