From mboxrd@z Thu Jan 1 00:00:00 1970 From: Shenlin Liang Date: Mon, 29 Apr 2024 14:13:22 +0800 (GMT+08:00) Subject: [PATCH v3 0/2] perf kvm: Add kvm stat support on riscv In-Reply-To: <20240422080833.8745-1-liangshenlin@eswincomputing.com> References: <20240422080833.8745-1-liangshenlin@eswincomputing.com> Message-ID: <5e830d33.45c7.18f287c8f73.Coremail.liangshenlin@eswincomputing.com> List-Id: To: kvm-riscv@lists.infradead.org MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Gentle ping... > > 'perf kvm stat report/record' generates a statistical analysis of KVM > events and can be used to analyze guest exit reasons. This patch tries > to add stat support on riscv. > > Map the return value of trace_kvm_exit() to the specific cause of the > exception, and export it to userspace. > > It records on two available KVM tracepoints for riscv: "kvm:kvm_entry" > and "kvm:kvm_exit", and reports statistical data which includes events > handles time, samples, and so on. > > Cross compiling perf in X86 environment may encounter issues with missing > libraries and tools. Suggest compiling nativly in RISC-V environment > > Simple tests go below: > > # ./perf kvm record -e "kvm:kvm_entry" -e "kvm:kvm_exit" > Lowering default frequency rate from 4000 to 2500. > Please consider tweaking /proc/sys/kernel/perf_event_max_sample_rate. > [ perf record: Woken up 18 times to write data ] > [ perf record: Captured and wrote 5.433 MB perf.data.guest (62519 samples) > > # ./perf kvm report > 31K kvm:kvm_entry > 31K kvm:kvm_exit > > # ./perf kvm stat record -a > [ perf record: Woken up 3 times to write data ] > [ perf record: Captured and wrote 8.502 MB perf.data.guest (99338 samples) ] > > # ./perf kvm stat report --event=vmexit > Event name Samples Sample% Time (ns) Time% Max Time (ns) Min Time (ns) Mean Time (ns) > STORE_GUEST_PAGE_FAULT 26968 54.00% 2003031800 40.00% 3361400 27600 74274 > LOAD_GUEST_PAGE_FAULT 17645 35.00% 1153338100 23.00% 2513400 30800 65363 > VIRTUAL_INST_FAULT 1247 2.00% 340820800 6.00% 1190800 43300 273312 > INST_GUEST_PAGE_FAULT 1128 2.00% 340645800 6.00% 2123200 30200 301990 > SUPERVISOR_SYSCALL 1019 2.00% 245989900 4.00% 1851500 29300 241403 > LOAD_ACCESS 986 1.00% 671556200 13.00% 4180200 100700 681091 > INST_ACCESS 655 1.00% 170054800 3.00% 1808300 54600 259625 > HYPERVISOR_SYSCALL 21 0.00% 4276400 0.00% 716500 116000 203638 > > Changes from v1->v2: > - Rebased on Linux 6.9-rc3. > > Changes from v2->v3: > - Add the missing assignment for 'vcpu_id_str' in patch 2. > - Remove parentheses that cause compilation errors > > Shenlin Liang (2): > RISCV: KVM: add tracepoints for entry and exit events > perf kvm/riscv: Port perf kvm stat to RISC-V > > arch/riscv/kvm/trace.h | 67 ++++++++++++++++ > arch/riscv/kvm/vcpu.c | 7 ++ > tools/perf/arch/riscv/Makefile | 1 + > tools/perf/arch/riscv/util/Build | 1 + > tools/perf/arch/riscv/util/kvm-stat.c | 79 +++++++++++++++++++ > .../arch/riscv/util/riscv_exception_types.h | 35 ++++++++ > 6 files changed, 190 insertions(+) > create mode 100644 arch/riscv/kvm/trace.h > create mode 100644 tools/perf/arch/riscv/util/kvm-stat.c > create mode 100644 tools/perf/arch/riscv/util/riscv_exception_types.h > > -- > 2.37.2 From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from zg8tmja2lje4os43os4xodqa.icoremail.net (zg8tmja2lje4os43os4xodqa.icoremail.net [206.189.79.184]) by smtp.subspace.kernel.org (Postfix) with ESMTP id A174DD534; Mon, 29 Apr 2024 06:15:42 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=206.189.79.184 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1714371347; cv=none; b=cfIm5r3PGHAjTYAC1a/Ikt9+2PM6CclWr/cziy83FeUaSg5gHE7gaOBIgV4lf4A2tQBoAjvzjgRfMiFfe81KyZ7tvQyE9uJC8GYZLxlaTqatt0uCTVgQ1T3d+qtNsdP6SBmhZ2fltCAyRRdwsb+WYHmy706Y7ST21ghYP/Y87z4= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1714371347; c=relaxed/simple; bh=ezHdYf0ToGwvT1Tn/f6ETFKnkP43vGQzEEh2GxSKbbM=; h=Date:From:To:Subject:In-Reply-To:References:Content-Type: MIME-Version:Message-ID; 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irogers@google.com, adrian.hunter@intel.com, linux-perf-users@vger.kernel.org Subject: Re: [PATCH v3 0/2] perf kvm: Add kvm stat support on riscv X-Priority: 3 X-Mailer: Coremail Webmail Server Version XT6.0.3 build 20220420(169d3f8c) Copyright (c) 2002-2024 www.mailtech.cn mispb-72143050-eaf5-4703-89e0-86624513b4ce-eswincomputing.com In-Reply-To: <20240422080833.8745-1-liangshenlin@eswincomputing.com> References: <20240422080833.8745-1-liangshenlin@eswincomputing.com> MIME-Version: 1.0 Message-ID: <5e830d33.45c7.18f287c8f73.Coremail.liangshenlin@eswincomputing.com> X-Coremail-Locale: zh_CN X-CM-TRANSID: TQJkCgAnOryCOi9mlSgJAA--.6236W X-CM-SenderInfo: xold0whvkh0z1lq6v25zlqu0xpsx3x1qjou0bp/1tbiAgEBDGYsyB ATxgABsI X-Coremail-Antispam: 1Ur529EdanIXcx71UUUUU7IcSsGvfJ3iIAIbVAYjsxI4VWxJw CS07vEb4IE77IF4wCS07vE1I0E4x80FVAKz4kxMIAIbVAFxVCaYxvI4VCIwcAKzIAtYxBI daVFxhVjvjDU= X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20240428_231524_705101_E4BE990B X-CRM114-Status: GOOD ( 12.38 ) X-BeenThere: linux-riscv@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-riscv" Errors-To: linux-riscv-bounces+linux-riscv=archiver.kernel.org@lists.infradead.org Gentle ping... > > 'perf kvm stat report/record' generates a statistical analysis of KVM > events and can be used to analyze guest exit reasons. This patch tries > to add stat support on riscv. > > Map the return value of trace_kvm_exit() to the specific cause of the > exception, and export it to userspace. > > It records on two available KVM tracepoints for riscv: "kvm:kvm_entry" > and "kvm:kvm_exit", and reports statistical data which includes events > handles time, samples, and so on. > > Cross compiling perf in X86 environment may encounter issues with missing > libraries and tools. Suggest compiling nativly in RISC-V environment > > Simple tests go below: > > # ./perf kvm record -e "kvm:kvm_entry" -e "kvm:kvm_exit" > Lowering default frequency rate from 4000 to 2500. > Please consider tweaking /proc/sys/kernel/perf_event_max_sample_rate. > [ perf record: Woken up 18 times to write data ] > [ perf record: Captured and wrote 5.433 MB perf.data.guest (62519 samples) > > # ./perf kvm report > 31K kvm:kvm_entry > 31K kvm:kvm_exit > > # ./perf kvm stat record -a > [ perf record: Woken up 3 times to write data ] > [ perf record: Captured and wrote 8.502 MB perf.data.guest (99338 samples) ] > > # ./perf kvm stat report --event=vmexit > Event name Samples Sample% Time (ns) Time% Max Time (ns) Min Time (ns) Mean Time (ns) > STORE_GUEST_PAGE_FAULT 26968 54.00% 2003031800 40.00% 3361400 27600 74274 > LOAD_GUEST_PAGE_FAULT 17645 35.00% 1153338100 23.00% 2513400 30800 65363 > VIRTUAL_INST_FAULT 1247 2.00% 340820800 6.00% 1190800 43300 273312 > INST_GUEST_PAGE_FAULT 1128 2.00% 340645800 6.00% 2123200 30200 301990 > SUPERVISOR_SYSCALL 1019 2.00% 245989900 4.00% 1851500 29300 241403 > LOAD_ACCESS 986 1.00% 671556200 13.00% 4180200 100700 681091 > INST_ACCESS 655 1.00% 170054800 3.00% 1808300 54600 259625 > HYPERVISOR_SYSCALL 21 0.00% 4276400 0.00% 716500 116000 203638 > > Changes from v1->v2: > - Rebased on Linux 6.9-rc3. > > Changes from v2->v3: > - Add the missing assignment for 'vcpu_id_str' in patch 2. > - Remove parentheses that cause compilation errors > > Shenlin Liang (2): > RISCV: KVM: add tracepoints for entry and exit events > perf kvm/riscv: Port perf kvm stat to RISC-V > > arch/riscv/kvm/trace.h | 67 ++++++++++++++++ > arch/riscv/kvm/vcpu.c | 7 ++ > tools/perf/arch/riscv/Makefile | 1 + > tools/perf/arch/riscv/util/Build | 1 + > tools/perf/arch/riscv/util/kvm-stat.c | 79 +++++++++++++++++++ > .../arch/riscv/util/riscv_exception_types.h | 35 ++++++++ > 6 files changed, 190 insertions(+) > create mode 100644 arch/riscv/kvm/trace.h > create mode 100644 tools/perf/arch/riscv/util/kvm-stat.c > create mode 100644 tools/perf/arch/riscv/util/riscv_exception_types.h > > -- > 2.37.2 _______________________________________________ linux-riscv mailing list linux-riscv@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-riscv