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Finding a profiler that works, damnitFinding a profiler that works, damnitPosted Apr 4, 2010 12:35 UTC (Sun) by chantecode (subscriber, #54535)In reply to: Finding a profiler that works, damnit by foom Parent article: KVM, QEMU, and kernel project management
We need to profile from NMI if we want to profile irqs as well. Otherwise a hardware pmu event would occur at the end of an irq disabled section, not at the exact place of the event, messing completely the result.
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Finding a profiler that works, damnit Posted Apr 5, 2010 1:37 UTC (Mon) by foom (subscriber, #14868) [Link]
You need to get stack traces for the *kernel* from an NMI. Surely the userspace backtracing can
wait until a more convenient time...
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