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

Roland Smith rsmith at
Thu Aug 25 18:19:39 GMT 2005

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

Yes it is.

> So you have no similar problems in -STABLE? How about when untarring a 
> bigger file and playing audio? If not, then maybe trying STABLE on that 
> other drive might be a good idea.

Yesterday I was making a level 0 dump of my /usr partition (32429 MB) to
another drive, which was being compressed with bzip2. CPU usage was
around 97% [for bzip2], but I didn't notice anything. While the dump was
underway, I was browsing with Firefox, and writing in emacs.

> The reason I wanted to see any changelog was to see if there is any 
> changes to this part of the code at all before trying it, but file by 
> file I would probably be lost since I am not a programmer.

The file is the most usual way to partition code. How else would you
know where to look?

Some other thing you might look at is if too many devices are sharing an
interrupt. Try ps -xa|grep '\[irq.*\]' If so, that might give problems,
I think. Anything in the logfiles?

R.F.Smith ( Please send e-mail as plain text.
public key:
-------------- next part --------------
A non-text attachment was scrubbed...
Name: not available
Type: application/pgp-signature
Size: 187 bytes
Desc: not available
Url :

More information about the freebsd-questions mailing list