5.4-prerelease - hanging under load

Matthias Buelow mkb at incubus.de
Sun Apr 3 10:01:49 PDT 2005

Emanuel Strobl wrote:

>Huh? I thought by default it is "HIGH", but it would also explain the 
>experiences in the thread "cpufreq related RELENG_5 regression" 

But does that also affect desktop machines?  I'm not under the
impression that my CPU is running at a lower frequency.  The issue
I mentioned only seems to occur when doing larger block reads/writes
from/to disk (SATA), like untarring firefox.  I didn't notice it
so far when some kind of mixed disk access is going on, like with
find, compiling, etc.  Maybe that points to some locking issues in
the VM corner?  I mean, it's not dramatic, but still makes the
system appear a bit unpolished, when it happens.  In the past, with
pre-5.x releases, FreeBSD has been scheduling disk i/o and interactive
work smoothly, in my experience, so one didn't quite notice when
heavy disk access was going on, at least not if your interactive
programs weren't doing much disk i/o themselves.


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