Problem with pthreads

[Joe Sadusk <jsadusk at isilon dot com>]

I'm in qa, and I'm attempting to port a filesystem stress test written 
for Linux to Windows using cygwin.  It uses pthreads to create many 
concurrent threads which read files out of a directory in various 
patterns.  The thing is, I've found that with any more than 55 threads, 
pthread_join will hang indefinitely, for no apparent reason.  Its also 
only the second call to pthread_join.  Its being called from the creator 
thread and each of the threads were cancelled prior to being joined (and 
the cancel appears to work fine, as all disk activity stops).  Its very 
strange.  With 55 threads everything works exactly as expected, and with 
56 it doesn't work at all.  Is this a known issue, or am I doing 
something wrong?

Thank you in advance if anyone is able to help me.

Joe Sadusk

QA Engineer - Isilon Systems



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