Bug#517122: libc6: very slow access/open/... syscalls on NFS mounted files
Thank you Aurelien,
I should have RTFM more closely. Also I've ran strace -c which is
claimed to report time spent in kernel...
on that "slow" system it is
% time seconds usecs/call calls errors syscall
------ ----------- ----------- --------- --------- ----------------
43.25 3.322673 10008 332 171 stat
25.46 1.955775 7190 272 28 open
16.58 1.273361 6006 212 162 access
12.25 0.940696 649 1449 1 lstat
1.06 0.081252 16250 5 1 unlink
0.78 0.060004 30002 2 link
whenever on another node (with no problem):
% time seconds usecs/call calls errors syscall
------ ----------- ----------- --------- --------- ----------------
66.35 0.008808 0 18427 read
9.08 0.001206 0 52497 rt_sigprocmask
5.73 0.000761 22 34 clone
3.53 0.000468 1 342 180 stat
3.48 0.000462 0 2354 20 close
3.29 0.000437 0 908 28 open
2.83 0.000376 0 1410 1 lstat
2.45 0.000325 5 68 34 wait4
> reassign 517122 linux-2.6
> retitle 517122 linux-2.6: very slow access/open/... syscalls on NFS mounted files
> thanks
> > whenever on other nodes it takes just 0.0001 or so
> This time is the time the userland (ie libc6) waits before getting an
> answer.
--
Yaroslav Halchenko
Research Assistant, Psychology Department, Rutgers-Newark
Student Ph.D. @ CS Dept. NJIT
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