Odd performance problem (hitching)

Alexander Kabaev kabaev at gmail.com
Fri Aug 26 00:20:39 GMT 2005


On Fri, 26 Aug 2005 09:13:53 +0930
"Daniel O'Connor" <doconnor at gsoft.com.au> wrote:

> I updated to -current recently (from an earlier -current) and haven't
> changed any kernel options, but now the systems seems to 'hitch'
> fairly frequently. ie the system will run fine then stall for half a
> second or so, then continue as normal. It is most noticeable when
> playing music.
> 
> If I turn powerd off and run the CPU at full speed it works better,
> but it still happens on occasion so I am guessing powerd isn't the
> problem per se, but just makes it worse.
> 
> I am not 100% sure when the problem started but if I get time I will
> try a binary search to find out.. It believe around 6.0-BETA1 (30
> July) was OK, but I don't have any more data points yet.
> 
> I've attached my dmesg and kernel config file if it helps.
> 
> -- 
> Daniel O'Connor software and network engineer
> for Genesis Software - http://www.gsoft.com.au
> "The nice thing about standards is that there
> are so many of them to choose from."
>   -- Andrew Tanenbaum
> GPG Fingerprint - 5596 B766 97C0 0E94 4347 295E E593 DC20 7B3F CE8C


Can you try backing out this commit?

http://cvsweb.FreeBSD.org/src/sys/kern/vfs_subr.c.diff?r1=1.641&r2=1.642
-- 
Alexander Kabaev
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