From: "Kang, Luwei" <luwei.kang@intel.com>
To: Andi Kleen <ak@linux.intel.com>
Cc: "x86@kernel.org" <x86@kernel.org>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
"kvm@vger.kernel.org" <kvm@vger.kernel.org>,
"peterz@infradead.org" <peterz@infradead.org>,
"mingo@redhat.com" <mingo@redhat.com>,
"acme@kernel.org" <acme@kernel.org>,
"mark.rutland@arm.com" <mark.rutland@arm.com>,
"alexander.shishkin@linux.intel.com"
<alexander.shishkin@linux.intel.com>,
"jolsa@redhat.com" <jolsa@redhat.com>,
"namhyung@kernel.org" <namhyung@kernel.org>,
"tglx@linutronix.de" <tglx@linutronix.de>,
"bp@alien8.de" <bp@alien8.de>, "hpa@zytor.com" <hpa@zytor.com>,
"pbonzini@redhat.com" <pbonzini@redhat.com>,
"Christopherson, Sean J" <sean.j.christopherson@intel.com>,
"vkuznets@redhat.com" <vkuznets@redhat.com>,
"wanpengli@tencent.com" <wanpengli@tencent.com>,
"jmattson@google.com" <jmattson@google.com>,
"joro@8bytes.org" <joro@8bytes.org>,
"pawan.kumar.gupta@linux.intel.com"
<pawan.kumar.gupta@linux.intel.com>,
"thomas.lendacky@amd.com" <thomas.lendacky@amd.com>,
"Yu, Fenghua" <fenghua.yu@intel.com>,
"kan.liang@linux.intel.com" <kan.liang@linux.intel.com>,
"like.xu@linux.intel.com" <like.xu@linux.intel.com>
Subject: RE: [PATCH v1 00/11] PEBS virtualization enabling via DS
Date: Fri, 6 Mar 2020 05:37:15 +0000 [thread overview]
Message-ID: <82D7661F83C1A047AF7DC287873BF1E17389190B@SHSMSX104.ccr.corp.intel.com> (raw)
In-Reply-To: <20200305224852.GE1454533@tassilo.jf.intel.com>
> Subject: Re: [PATCH v1 00/11] PEBS virtualization enabling via DS
>
> > Testing:
> > The guest can use PEBS feature like native. e.g.
>
> Could you please add example qemu command lines too? That will make it
> much easier for someone to reproduce.
I introduce a new CPU parameter "pebs" to enable PEBS in KVM guest(disabled in default)
e.g. "qemu-system-x86_64 -enable-kvm -M q35 -cpu Icelake-Server,pmu=true,pebs=true ...."
[PATCH v1 0/3] PEBS virtualization enabling via DS in Qemu
https://lore.kernel.org/qemu-devel/1583490005-27761-1-git-send-email-luwei.kang@intel.com/
Thanks,
Luwei Kang
>
> -Andi
> >
> > # perf record -e instructions:ppp ./br_instr a
> >
> > perf report on guest:
> > # Samples: 2K of event 'instructions:ppp', # Event count (approx.):
> 1473377250
> > # Overhead Command Shared Object Symbol
> > 57.74% br_instr br_instr [.] lfsr_cond
> > 41.40% br_instr br_instr [.] cmp_end
> > 0.21% br_instr [kernel.kallsyms] [k] __lock_acquire
> >
> > perf report on host:
> > # Samples: 2K of event 'instructions:ppp', # Event count (approx.):
> 1462721386
> > # Overhead Command Shared Object Symbol
> > 57.90% br_instr br_instr [.] lfsr_cond
> > 41.95% br_instr br_instr [.] cmp_end
> > 0.05% br_instr [kernel.vmlinux] [k] lock_acquire
prev parent reply other threads:[~2020-03-06 5:37 UTC|newest]
Thread overview: 32+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-03-05 17:56 [PATCH v1 00/11] PEBS virtualization enabling via DS Luwei Kang
2020-03-05 16:51 ` Paolo Bonzini
2020-03-05 17:56 ` [PATCH v1 01/11] perf/x86/core: Support KVM to assign a dedicated counter for guest PEBS Luwei Kang
2020-03-06 13:53 ` Peter Zijlstra
2020-03-06 14:42 ` Liang, Kan
2020-03-09 10:04 ` Peter Zijlstra
2020-03-09 13:12 ` Liang, Kan
2020-03-09 15:05 ` Peter Zijlstra
2020-03-09 19:28 ` Liang, Kan
2020-03-12 10:28 ` Kang, Luwei
2020-03-26 14:03 ` Liang, Kan
2020-04-07 12:34 ` Kang, Luwei
2020-06-12 5:28 ` Kang, Luwei
2020-06-19 9:30 ` Kang, Luwei
2020-08-20 3:32 ` Like Xu
2020-03-09 15:44 ` Andi Kleen
2020-03-05 17:56 ` [PATCH v1 02/11] perf/x86/ds: Handle guest PEBS events overflow and inject fake PMI Luwei Kang
2020-03-05 17:56 ` [PATCH v1 03/11] perf/x86: Expose a function to disable auto-reload Luwei Kang
2020-03-05 17:56 ` [PATCH v1 04/11] KVM: x86/pmu: Decouple event enablement from event creation Luwei Kang
2020-03-05 17:56 ` [PATCH v1 05/11] KVM: x86/pmu: Add support to reprogram PEBS event for guest counters Luwei Kang
2020-03-06 16:28 ` kbuild test robot
2020-03-06 16:28 ` kbuild test robot
2020-03-09 0:58 ` Xu, Like
2020-03-09 0:58 ` Xu, Like
2020-03-05 17:57 ` [PATCH v1 06/11] KVM: x86/pmu: Implement is_pebs_via_ds_supported pmu ops Luwei Kang
2020-03-05 17:57 ` [PATCH v1 07/11] KVM: x86/pmu: Expose CPUIDs feature bits PDCM, DS, DTES64 Luwei Kang
2020-03-05 17:57 ` [PATCH v1 08/11] KVM: x86/pmu: PEBS MSRs emulation Luwei Kang
2020-03-05 17:57 ` [PATCH v1 09/11] KVM: x86/pmu: Expose PEBS feature to guest Luwei Kang
2020-03-05 17:57 ` [PATCH v1 10/11] KVM: x86/pmu: Introduce the mask value for fixed counter Luwei Kang
2020-03-05 17:57 ` [PATCH v1 11/11] KVM: x86/pmu: Adaptive PEBS virtualization enabling Luwei Kang
2020-03-05 22:48 ` [PATCH v1 00/11] PEBS virtualization enabling via DS Andi Kleen
2020-03-06 5:37 ` Kang, Luwei [this message]
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