Slow timer of 7-stable on IBM x3550
Tz-Huan Huang
tzhuan at csie.org
Thu Mar 6 20:11:49 UTC 2008
Hi,
We have a IBM x3550 running 7-stable. The timer is 4x~5x slower than
it should be,
for example:
$ time sleep 1
real 0m4.979s
user 0m0.000s
sys 0m0.000s
$ time sleep 2
real 0m9.949s
user 0m0.000s
sys 0m0.000s
The kernel is csup'd and built today: (sys/dev/aic7xxx/aic79xx_osm.c
is replaced by
version 1.32 from 8-current to avoid some ahd problems)
$ uname -a
FreeBSD cml2 7.0-STABLE FreeBSD 7.0-STABLE #0: Fri Mar 7 03:02:06 CST 2008
root at cml2:/tmp2/usr/src/sys/CML2 amd64
dmesg: http://w.csie.org/~tzhuan/tmp/dmesg.txt
sysctl: http://w.csie.org/~tzhuan/tmp/sysctl.txt
kernel config: http://w.csie.org/~tzhuan/tmp/kern.config
Any comments? Thanks a lot.
Tz-Huan
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