Performance Issues with AMD64 3000+, 1.5GB RAM, FreeBSD 5.4-RELEASE

Kris Kennaway kris at
Fri Aug 26 19:27:54 GMT 2005

On Fri, Aug 26, 2005 at 01:14:35PM -0500, Mark Kane wrote:
> Kris Kennaway wrote:
> >On Thu, Aug 25, 2005 at 12:48:17PM -0500, Mark Kane wrote:
> >
> >>Roland Smith wrote:
> >>
> >>>Another thing to look at might be the scheduler. I'm using SCHED_4BSD.
> >>
> >>Hmm, I'm using just a GENERIC kernel with support added in for my sound 
> >>driver and atapicam for K3b. SCHED_4BSD looks default in GENERIC:
> >>
> >>options         SCHED_4BSD              # 4BSD scheduler
> >>
> >>I've been trying this morning with no real disk I/O and just XMMS open. 
> >>It's much better than if I did have a download/upload going using disk 
> >>I/O or trying to read from a file on the drive, but still nowhere near 
> >>perfect. Every minute I'll still hear a little skip or stutter in the 
> >>audio, and still notice the mouse locking up a bit at the exact moment 
> >>that happens.
> >
> >
> >Did you not read my mail?  I explained this and the solution.
> >
> >Kris
> Yes, I read your email and responded to it yesterday. I said:
> -------------------------
> I found the sound skipping thread by Jeff. Looks like a great 
> explanation, however my problem even occurs even with light disk I/O 
> such as reading an mp3/Ogg/video file off any of the drives. I did some 
> more testing with actual files off the drives last night instead of 
> streams, and it seems worse with actual files.
> I'm not sure if the proposed patch will fix it or not, and trying 
> 6.0-BETA2 for my other hardware/hard drive problem just introduced new 
> problems (panics, network stuff not recognized, etc). I do have a spare 
> hard drive where I could put test anything though if you think trying 
> -CURRENT or another BETA would be worthwhile.
> -------------------------
> So, in other words, even when there is NOT heavy disk I/O it still has 
> problems, although they do get worse with more disk I/O. I don't know if 
> you saw my previous replies, but trying 5.4-STABLE on my Athlon XP 2000+ 
> instead of 5.4-RELEASE seemed to make it much better on that machine 
> (however still not perfect).
> I was wondering if the code that fixed it in 6 was merged to 5-STABLE or 
> if the patch was already committed to 5-STABLE? I haven't tried -STABLE 
> on my amd64 yet though.

The patch is in 6.0 only and has not yet been merged to 5.x.

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