Re: perf with precise attribute kills all KVM based VMs

From: David Ahern
Date: Mon Jul 09 2012 - 10:52:49 EST


On 7/9/12 8:49 AM, Peter Zijlstra wrote:
On Mon, 2012-07-09 at 08:47 -0600, David Ahern wrote:

I found this testing changes to perf-kvm, but found the problem extends
to just perf-record. With perf-record exclude_guest defaults to 1. See
tools/perf/util/util.c, event_attr_init().

You lost me there.. so perf-record defaults to exclude_guest=1 (which
would make the proposed patch I just send actually possible), but its
still going *bang* ?



I can do the formality of testing your proposed patch, but yes I think so. exclude_guest defaults to 1 because perf_guest defaults to false.

David
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