Date: Thu, 20 Jan 2005 12:15:10 +0000 From: Gavin Atkinson <gavin.atkinson@ury.york.ac.uk> To: Bartosz Fabianowski <freebsd@chillt.de> Cc: freebsd-stable@freebsd.org Subject: Re: Persisting troubles with periodic stalls every few minutes Message-ID: <1106223310.68614.4.camel@buffy.york.ac.uk> In-Reply-To: <41EF0B1E.6010209@chillt.de> References: <41EF0B1E.6010209@chillt.de>
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On Thu, 2005-01-20 at 02:36 +0100, Bartosz Fabianowski wrote: > Hi list, > > I have been having a lot of trouble with performance on my laptop, which > I first set up with 5.3-RELEASE and constantly keep up to date with > 5.3-STABLE. The box runs stable, but periodically, somewhere between > every few minutes down to every few seconds, it stalls for 5 seconds. By > that I mean that the screen is not being refreshed and all keyboard > strokes go into some kind of buffer to get processed when the stall is > over. Some key strokes also get lost or reversed in order, which makes > this even more annoying. > > The trouble is that I cannot figure out how to find the responsible > process. Tools such as top(1) update in one second intervals at best and > as there are no screen updates during the stall, so they produce nothing > useful. The only tool that gave me some kind of information was > systat(1). When I invoke "systat -vmstat 1", I see the following: Try running top with the -q option, and/or pressing space (which causes top to try and refresh immediately). If you still can't get any screen updates to happen during the freeze, try top -qbSs 1 -d max > /var/tmp/somefile And look through the file to see if you can establish what was actually happening at the time of the freeze. Gavin
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