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Re: [Xen-devel] vpmu=1 and running 'perf top' within a PVHVM guest eventually hangs dom0 and hypervisor has stuck vCPUS. Romley-EP (model=45, stepping=2)
On 03/12/2013 04:54 PM, Boris Ostrovsky wrote:
I think by default perf top runs off timer interrupt so it does not
use HW counters. But watchdog
is implemented on top of the counters so perhaps it fires the
interrupt at a bad time, messing
something up.
I was wrong -- perf top does use performance counters by default.
-boris
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