http://qa.mandrakesoft.com/show_bug.cgi?id=3172
Product: kernel
Component: kernel
Summary: all interrupts routed to CPU0 cripples kernel
performance
Version: 2.4.21-0.13mdk
Platform: PC
OS/Version: All
Status: UNCONFIRMED
Severity: critical
Priority: P1
AssignedTo: [EMAIL PROTECTED]
ReportedBy: [EMAIL PROTECTED]
This bug has been signaled on cooker mailing list, I signal it on behalf of
Wesley J Landaker, who could not reach Bugzilla:
> IO-APIC is enabled on my system, however all interrupts are routed to
> CPU0. This didn't used to be the case, and I see a *drastic*
> performance hit because of this (for instance, using mencoder to
> capture real-time TV I used to get 35fps, now I can't even get
> 20fps).
It has been confirme by several people with different kernels:
with standard kernel 2.4.21, I observed a very drastic performance problem with
mencoder, encoding a video or TV, or encoding sound in oggvorbis (about 5
times slower).
This happens also with the smp kernel, and this is even worse with the
multimedia kernel.
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