Reading /proc/stat is slooow

From: Andreas Schwab <>
Date: 2005-12-03 04:42:49
At some point after 2.6.13 reading /proc/stat has become too slow.  This
is most visible with xosview, which spends up to 80% in kernel space.  I
have attached a simple program that you can run with "strace -r" to see
that the second read of /proc/stat which eventually returns EOF takes too
much time.  If you remove the loop around read the same amount of time is
now spent in close.


Andreas Schwab, SuSE Labs,
SuSE Linux Products GmbH, Maxfeldstraße 5, 90409 Nürnberg, Germany
PGP key fingerprint = 58CA 54C7 6D53 942B 1756  01D3 44D5 214B 8276 4ED5
"And now for something completely different."

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Received on Sat Dec 03 04:43:48 2005

This archive was generated by hypermail 2.1.8 : 2005-12-03 04:43:55 EST