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Re: Machine very sluggish while compiling
On 24/11/2011 11:06 PM, Mike wrote:
Hi Ryan,I've used Process Explorer several times in the past, but it's not
immediately obvious to me what I should be using it to look for.
Suspicious dlls? I keep my machine patched, regularly check my process
list for suspicious/unfamiliar entries, and have not had a virus in
roughly 8 years (and that one was thanks to my sister in-law borrowing
the machine). I can't rule out a rootkit infection, but PE wouldn't be
any help there anyway.
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 .
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:
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.Latest version of cygwin's bash, bash-completions package is not
installed. Also, make+compilation seems to proceed at normal speed the
whole time... it's everybody else that suffers.
Search for bash slow might yield some clues:
BTW, thanks for the ideas, they're definitely solid sanity checks.
Problem reports: http://cygwin.com/problems.html
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