Low/Jerky performance in FreeBSD 7

Vince Hoffman jhary at unsane.co.uk
Mon May 19 21:45:46 UTC 2008

Yani Brankov wrote:
> Hey guys,
> I recently updated to FreeBSD 7 and noticed that my box started to 
> perform as windows does under heavier loads. The mouse starts to be 
> jerky when compiling, window updates/redraws are slow and bump the CPU 
> usage up to 100%. I attributed this to the mga driver which comes with 
> the distro in the beginning. However, I later noticed the same happens 
> even when X has not been started. For instance, I start a kernel compile 
> and the console mouse becomes jumpy. All these have never happened 
> before with FreeBSD on this box. It has enough memory (1.5G) and 
> relatively fast CPU (2.5GHz). I started to think this may be originating 
> from kernel level (irq handling, long times in giant locked code during 
> syscalls, etc).
> I am wondering whether it is only me who has hit this problem or it is 
> more common. It may be also related to hardware configuration, etc. I'm 
> trying to figure out.
Not just you, 


> Attaching my dmesg output in case it's important.
> Yani
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