Machine very sluggish while compiling
Mike
mcf@chariot.net.au
Fri Nov 25 04:17:00 GMT 2011
Hi Ryan,
Ryan Johnson wrote:
> Lately I've noticed that running make -j4 on my quad-core win7-x64
> machine causes it to become sluggish or even unresponsive. For example,
> compiling a large package makes the mouse jumpy, delays keystrokes, adds
> stutter to my music, and makes task switching painfully slow (though,
> oddly, if I manage to switch to the mintty that runs make the machine
> "comes back"). The sluggishness always hits when I'm using a native
> windows app with the compile running in the background. This starts to
> sound oddly like the recently-reported issue where X was causing native
> windows apps to freeze [1].
>
> I'm not seeing any fork failures, and am running BLODA-free (Windows
> Defender hasn't reappeared since I last uninstalled it). There's no
> unusual disk activity and memory utilization remains stable. I've tried
> running with nice, reducing the priority of 'make' from the task
> manager, and running make -j3 to no avail, though empirically if
> utilization stays at or below 2 cpu then there's no problem. I've
> compiled large apps (gcc, binutils, emacs, gdb, ...) off and on for
> several years now and never seen this behavior before.
>
> Any ideas of how I might diagnose the issue further? It's easy enough to
> work around, but compiles take a lot longer with only 1-2 cores instead
> of 4.
I've seen problems like this caused by viruses. Process Explorer might
give you more detailed info:
http://technet.microsoft.com/en-au/sysinternals/bb896653
Perhaps you are using a different version of bash or other shell? Some
versions have been known to bog down the system as you describe.
Search for bash slow might yield some clues:
http://cygwin.com/ml/cygwin/
--
Regards,
Mike
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