[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] Re: [Xen-devel] [PATCH 4 of 6 v2] xen: tracing: report where a VCPU wakes up
On Fri, 2012-12-14 at 19:57 +0000, George Dunlap wrote: > On 12/12/12 02:52, Dario Faggioli wrote: > > When looking at traces, it turns out to be useful to know where a > > waking-up VCPU is being queued. Yes, that is always the CPU where > > it ran last, but that information can well be lost in past trace > > records! > > When you say "lost in past trace records", do you primarily mean that > the records themselves have been lost (due to the per-cpu trace buffers > filling up), or do you mean that it may be way way back and you don't > want to go back and find it? > The latter... I'm quite lazy when looking at traces! :-P > If the latter, I think the best thing to do would be to just augment > xenalyze to keep track of that information and print it when it sees the > wake record. > I agree, I'll kill this patch for now, and investigate further solution along the line you suggested in the future. Thanks and Regards, Dario -- <<This happens because I choose it to happen!>> (Raistlin Majere) ----------------------------------------------------------------- Dario Faggioli, Ph.D, http://retis.sssup.it/people/faggioli Senior Software Engineer, Citrix Systems R&D Ltd., Cambridge (UK) Attachment:
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