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

Mark Kane mark at
Fri Aug 26 17:08:52 GMT 2005

Chris wrote:
> Try these in kernel
> and commenting options        ADAPTIVE_GIANT
> and disable apic.
> Tell me if that imporves or makes worse.

Well I did the kernel part, but wasn't sure how you wanted me to disable 
APIC. I looked in the BIOS but don't see any setting like "APIC On/Off", 
but there is a few settings for a few IRQ's, and they are set to "Auto". 
If I go to those options, it shows on one of the IRQ's the network 
controller and one of the ata controllers, but only gives me the option 
to change the IRQ for both of them.

After doing the kernel and rebooting, I tried again. From what I can 
tell, there is no change. I untarred a large source file again while 
playing audio, and about the same result. The mouse also froze several 
times when the audio was stuttering too, however most of the time I just 
sat back and listened and watched it untar.

I tried to make an audio clip of the stuttering, but for some reason in 
the clip it doesn't sound half as bad as it did when coming out. I am 
not sure why, since I took the exact output of the sound card, ran it 
through a mixer here, and then back in. It should sound equally bad if 
not worse, but here is a link to the 45 second clip:

I took the last 45 seconds or so of the untar because when recording it, 
it sounded the worst. However it's not terrible in this clip...the last 
10 seconds or so is right when it finished and is playing "normal".


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