Hi all,
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.
Thanks,
Ryan
[1] http://cygwin.com/ml/cygwin-xfree/2011-11/msg00027.html
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