From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-0.8 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 36DFAC3F2D1 for ; Thu, 5 Mar 2020 22:48:55 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 139B12073D for ; Thu, 5 Mar 2020 22:48:55 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726891AbgCEWsx (ORCPT ); Thu, 5 Mar 2020 17:48:53 -0500 Received: from mga11.intel.com ([192.55.52.93]:5209 "EHLO mga11.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726300AbgCEWsx (ORCPT ); Thu, 5 Mar 2020 17:48:53 -0500 X-Amp-Result: UNKNOWN X-Amp-Original-Verdict: FILE UNKNOWN X-Amp-File-Uploaded: False Received: from orsmga004.jf.intel.com ([10.7.209.38]) by fmsmga102.fm.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 05 Mar 2020 14:48:53 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.70,519,1574150400"; d="scan'208";a="387645389" Received: from tassilo.jf.intel.com (HELO tassilo.localdomain) ([10.7.201.21]) by orsmga004.jf.intel.com with ESMTP; 05 Mar 2020 14:48:52 -0800 Received: by tassilo.localdomain (Postfix, from userid 1000) id C0679301BC6; Thu, 5 Mar 2020 14:48:52 -0800 (PST) Date: Thu, 5 Mar 2020 14:48:52 -0800 From: Andi Kleen To: Luwei Kang Cc: x86@kernel.org, linux-kernel@vger.kernel.org, kvm@vger.kernel.org, peterz@infradead.org, mingo@redhat.com, acme@kernel.org, mark.rutland@arm.com, alexander.shishkin@linux.intel.com, jolsa@redhat.com, namhyung@kernel.org, tglx@linutronix.de, bp@alien8.de, hpa@zytor.com, pbonzini@redhat.com, sean.j.christopherson@intel.com, vkuznets@redhat.com, wanpengli@tencent.com, jmattson@google.com, joro@8bytes.org, pawan.kumar.gupta@linux.intel.com, thomas.lendacky@amd.com, fenghua.yu@intel.com, kan.liang@linux.intel.com, like.xu@linux.intel.com Subject: Re: [PATCH v1 00/11] PEBS virtualization enabling via DS Message-ID: <20200305224852.GE1454533@tassilo.jf.intel.com> References: <1583431025-19802-1-git-send-email-luwei.kang@intel.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1583431025-19802-1-git-send-email-luwei.kang@intel.com> Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org > 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. -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