RELENG_7: interrupt eating whole cpu core
Dominic Fandrey
kamikaze at bsdforen.de
Wed Feb 6 19:12:24 UTC 2008
Dominic Fandrey wrote:
> While ripping DVDs the irq14: ata0 eats ~95% of one of my cores. The
> channel is exclusive to the drive.
>
> ...
>
> behaviour has changed. This is an HP 6510b GR695EA#ABD, if anyone thinks
> it might be helpful, I can supply you with a dmesg and the output of
> pciconf -lv.
The problem remains with fresh sources:
PID USERNAME THR PRI NICE SIZE RES STATE C TIME CPU COMMAND
12 root 1 171 ki31 0K 16K RUN 0 22:04 97.85% idle: cpu0
37 root 1 -64 - 0K 16K CPU1 1 2:35 96.00% irq14: ata0
11 root 1 171 ki31 0K 16K RUN 1 19:32 6.40% idle: cpu1
The rip is done by k3b, so the drive is accessed through the cam interface.
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