[Mono-list] Mono Performance Question

Aaron Knister aaron.knister at gmail.com
Mon Feb 23 11:37:13 EST 2009


I realize this is an extremely open ended and vague question but I'm running
an application that's doing some intense computation and taking forever and
a half. Using strace I looked at what it was doing and I didn't know what to
make of what I saw. I pasted it below-

% time     seconds  usecs/call     calls    errors syscall
------ ----------- ----------- --------- --------- ----------------
 57.97    0.053464          59       911       431 futex
 35.74    0.032959         122       270       270 rt_sigsuspend
  5.42    0.004995         178        28        28 epoll_wait
  0.88    0.000813           1       550           tgkill
  0.00    0.000000           0         4           mmap
  0.00    0.000000           0         5           mprotect
  0.00    0.000000           0       540       540 rt_sigreturn
  0.00    0.000000           0       448           clock_gettime
------ ----------- ----------- --------- --------- ----------------
100.00    0.092231                  2756      1269 total

Does anybody have an idea as to why it's spending so much time calling futex
and rt_sigsuspend?
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