Performance issues in 5.3-RELEASE.

[Paul Boehmer]

> Hello,
>
>   Recently I took some time to upgrade my home 4.9 system to
> 5.3-RELEASE (fortunately, taking full system dump before, so I can
> easily get back). In fact just after upgrading I ran into the weird
> issue during installation for firefox port.
>
> When firefox-1.0-source.tar.bz2 is getting untared, the system starts to
> be *slow*: any music starts to be jittered and the cursor in X stalls
> from time to time for ~1 second.
>
> And I never had this issue before with 4.x serie.
>
> I tried to boot with an without ACPI, with GENERIC kernel, with my "own"
> kernel configuration (GENERIC with removed unused SCSI/RAID/NIC drivers)
> both with and without PREEMPTION[1]. Without any visible change in 
> system's
> behaviour.

<snip>

I am also experiencing the same issue on my 5.3-STABLE workstation (last 
buildworld 11/15/2004).  In addition to disabling/enabling ACPI and kernel 
tweaks, it have set my ata channels from UDMA100 to PIO4 with no change (I 
would have expected higher load). It appears any moderately intensive disk 
i/o (ie extracting mozilla source) will have a unusual high impact on 
system load.  I can provide any additional information if needed.

Thanks in advance.

-- 
Paul Boehmer
paul at pboehmer.com