From: Andi Kleen <ak@linux.intel.com>
To: "Wang, Wei W" <wei.w.wang@intel.com>
Cc: Peter Zijlstra <peterz@infradead.org>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
"kvm@vger.kernel.org" <kvm@vger.kernel.org>,
"pbonzini@redhat.com" <pbonzini@redhat.com>,
"mingo@redhat.com" <mingo@redhat.com>,
"rkrcmar@redhat.com" <rkrcmar@redhat.com>,
"Xu, Like" <like.xu@intel.com>
Subject: Re: [PATCH v1 1/8] perf/x86: add support to mask counters from host
Date: Mon, 5 Nov 2018 10:20:15 -0800 [thread overview]
Message-ID: <20181105182015.GP6218@tassilo.jf.intel.com> (raw)
In-Reply-To: <286AC319A985734F985F78AFA26841F73DE3AC8B@shsmsx102.ccr.corp.intel.com>
I ran into a similar problem with my PEBS virtualization patchkit.
My solution was: basically schedule as normal, but tell the scheduler to
force allocate a counter on a specific index. It can be done
only with a few lines of change in the scheduler code.
-Andi
next prev parent reply other threads:[~2018-11-05 18:20 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-11-01 10:04 [PATCH v1 0/8] Intel Virtual PMU Optimization Wei Wang
2018-11-01 10:04 ` [PATCH v1 1/8] perf/x86: add support to mask counters from host Wei Wang
2018-11-01 14:52 ` Peter Zijlstra
2018-11-02 9:08 ` Wei Wang
2018-11-05 9:34 ` Peter Zijlstra
2018-11-05 11:19 ` Wei Wang
2018-11-05 12:14 ` Peter Zijlstra
2018-11-05 15:37 ` Wang, Wei W
2018-11-05 16:56 ` Peter Zijlstra
2018-11-05 18:20 ` Andi Kleen [this message]
2018-11-01 10:04 ` [PATCH v1 2/8] perf/x86/intel: add pmi callback support Wei Wang
2018-11-01 10:04 ` [PATCH v1 3/8] KVM/x86/vPMU: optimize intel vPMU Wei Wang
2018-11-01 10:04 ` [PATCH v1 4/8] KVM/x86/vPMU: support msr switch on vmx transitions Wei Wang
2018-11-01 10:04 ` [PATCH v1 5/8] KVM/x86/vPMU: intel_pmu_read_pmc Wei Wang
2018-11-01 10:04 ` [PATCH v1 6/8] KVM/x86/vPMU: remove some unused functions Wei Wang
2018-11-01 10:04 ` [PATCH v1 7/8] KVM/x86/vPMU: save/restore guest perf counters on vCPU switching Wei Wang
2018-11-01 10:04 ` [PATCH v1 8/8] KVM/x86/vPMU: return the counters to host if guest is torn down Wei Wang
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