Re: mysql performance tuning @ FreeBSD6

I'm curious whether Robert's patch might have an
effect on samba3 performance as well.

This isn't very methodical, but I see about
60% increase samba3 read bandwidth (from 14MB/s to
26Mb/s) when changing from the default
kern.timecounter.hardware=i8254 to TSC, which
makes me wonder whether it might.

Below are details..
Rich Murphey

-------------------------------
Server: Samba3 on a dual xeon running FreeBSD 6.0 release.
Client: nbench on windows XP SP2.
Client and server are using intel pro 1000MT gigabit cards.

Here's the nbench output w/comments:

w/sysctl kern.timecounter.hardware=TSC:

Disk Performance, MBytes/sec
File size: 100.0 MBytes

thread:   0
write:    7.93
read:     22.94

followed by kern.timecounter.hardware=i8254:

Disk Performance, MBytes/sec
File size: 100.0 MBytes

thread:   0
write:    6.80
read:     14.01

and back to kern.timecounter.hardware=TSC:
Disk Performance, MBytes/sec
File size: 100.0 MBytes

thread:   0
write:    7.77
read:     23.61

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