On Tue, 29 Jun 2010 11:04:09 +0800, Zhenyu Wang <zhen...@linux.intel.com> wrote: > > 'Wait' instruction allows EU to stop and wait notification > register state clear to continue the execution. And we can > clear the notifications through MMIO, so we can track EU > execution step by step. > > I use below patch for implement 'wait' in mesa, and attach > 'intel_eu_cont.c' program to kick EU to continue. This is > useful in debugging sandybridge for me.
Interesting. So are you able to get any more information out besides "somebody is waiting"? Inspect register state, instruction pointer, anything? I can see how just getting "somebody is waiting" would be useful, though, so I'd be happy to see these patches land.
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