From: Andi Kleen <andi@firstfloor.org>
To: peterz@infradead.org
Cc: gleb@kernel.org, pbonzini@redhat.com, eranian@google.com,
kvm@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Implement PEBS virtualization for Silvermont
Date: Thu, 29 May 2014 18:12:03 -0700 [thread overview]
Message-ID: <1401412327-14810-1-git-send-email-andi@firstfloor.org> (raw)
PEBS is very useful (e.g. enabling the more cycles:pp event or
memory profiling) Unfortunately it didn't work in virtualization,
which is becoming more and more common.
This patch kit implements simple PEBS virtualization for KVM on Silvermont
CPUs. Silvermont does not have the leak problems that prevented successfull
PEBS virtualization earlier.
It needs some (simple) modifcations on the host perf code, in addition to
a PEBS device model in KVM. The guest does not need any modifications.
It also requires running with -cpu host. This may in term cause
some other problems with the guest perf (due to writes to various missing
MSRs), but these can be addressed separately.
For more details please see the description of the individual patches.
Available in
git://git.kernel.org/pub/scm/linux/kernel/git/ak/linux-misc.git perf/kvm-pebs-slm
-Andi
next reply other threads:[~2014-05-30 1:12 UTC|newest]
Thread overview: 29+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-05-30 1:12 Andi Kleen [this message]
2014-05-30 1:12 ` [PATCH 1/4] perf: Add PEBS virtualization enable for Silvermont Andi Kleen
2014-05-30 1:12 ` [PATCH 2/4] perf: Allow guest PEBS for KVM owned counters Andi Kleen
2014-05-30 7:31 ` Peter Zijlstra
2014-05-30 16:03 ` Andi Kleen
2014-05-30 16:17 ` Peter Zijlstra
2014-05-30 1:12 ` [PATCH 3/4] perf: Handle guest PEBS events with a fake event Andi Kleen
2014-05-30 7:34 ` Peter Zijlstra
2014-05-30 16:29 ` Andi Kleen
2014-05-30 1:12 ` [PATCH 4/4] kvm: Implement PEBS virtualization Andi Kleen
2014-05-30 8:21 ` Gleb Natapov
2014-05-30 16:24 ` Andi Kleen
2014-06-02 16:45 ` Gleb Natapov
2014-06-02 16:52 ` Andi Kleen
2014-06-02 19:09 ` Marcelo Tosatti
2014-06-02 19:05 ` Eric Northup
2014-06-02 19:57 ` Andi Kleen
2014-06-19 14:39 ` Paolo Bonzini
2014-06-10 18:04 ` Marcelo Tosatti
2014-06-10 19:22 ` Andi Kleen
2014-06-10 21:06 ` Marcelo Tosatti
2014-06-19 14:42 ` Paolo Bonzini
2014-06-19 17:33 ` Andi Kleen
2014-06-19 20:33 ` Paolo Bonzini
2014-06-22 13:57 ` Avi Kivity
2014-06-22 19:02 ` Andi Kleen
2014-06-24 16:45 ` Marcelo Tosatti
2014-06-25 7:04 ` Avi Kivity
2014-05-30 7:39 ` Implement PEBS virtualization for Silvermont Peter Zijlstra
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