On Sat, 2005-04-02 at 22:35 +0200, Ingo Molnar wrote: > > For kicks I ran this on 2.6.11-rc2-RT-V0.7.36-02 (I still had it as a > > Grub option), and the system just locked up hard. I just was curious > > if this was from a different change. But at least in the latest it > > shows output, and not just a hard lockup. > > > > Oh, the bug report was running kernel 2.6.12-rc1-RT-V0.7.43-06. > > ok, so it's not the recent NFS changes. Here's an interesting trace I got today. It looks either the emu10k1 or USB irq handler left IRQ 10 disabled. This isn't a tracer bug because you can clearly see this leads to an xrun. Since I've been hacking the emu10k1 driver quite a bit, I suspect this is the problem. This trace also shows that my trigger callback for the emu10k1 multichannel device needs optimizing; it takes 300 usecs to stop all 16 voices, not acceptable for an ALSA irq handler which uses SA_INTERRUPT. I think I can improve this significantly by reordering the register settings and eliminating some function call overhead. Lee
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- References:
- [patch] Real-Time Preemption, -RT-2.6.12-rc1-V0.7.41-10
- From: Ingo Molnar <[email protected]>
- Re: [patch] Real-Time Preemption, -RT-2.6.12-rc1-V0.7.43-00
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- Re: [patch] Real-Time Preemption, -RT-2.6.12-rc1-V0.7.43-00
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