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 Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id BB6A5C47DD9 for ; Thu, 28 Mar 2024 03:20:34 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:MIME-Version:List-Subscribe:List-Help: List-Post:List-Archive:List-Unsubscribe:List-Id:Message-Id:Date:Subject:Cc:To :From:Reply-To:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:In-Reply-To:References: List-Owner; bh=58ZcpU7pHH+ll+PFzLyZxkgBpKcPbBRMEPBT/Z3Pm8U=; b=1JqO49oBeMAzpX H5eX8jXIelDNAiuQC1aFJJ4JXPeE07Vn3o5rRJDvGAF0YYT8yM+DafcqS1LHudoYj0u8ZcRn4HIB7 xJhzhf2+lcSeJMX94Vn1FKpnCx5PBTa9Z/V7+ikWIjQthTAJlCsVcCYFNgMGacNJA8KZMqayG9fZ3 AfXFz0jKrvvYdqayavP4kaXuguOXHI5ciFxyqcdhAgWajVtIm2LGTcrbjAz+Yrfc/azyMcJTGtAs8 cDfKE7dIUvoFy0mpae1eayO6FCjCTLa+99W+tT8CS4Am7oNM3aCPEgSTPgH/tAGKm46HmVRR/x+xU n4p2f1Lw5VSG96q0BZZg==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.97.1 #2 (Red Hat Linux)) id 1rpgJa-0000000CFlP-0B7Y; Thu, 28 Mar 2024 03:20:30 +0000 Received: from zg8tmja5ljk3lje4ms43mwaa.icoremail.net ([209.97.181.73]) by bombadil.infradead.org with esmtp (Exim 4.97.1 #2 (Red Hat Linux)) id 1rpgJT-0000000CFha-2S1Y; Thu, 28 Mar 2024 03:20:26 +0000 Received: from localhost.localdomain (unknown [10.12.130.31]) by app1 (Coremail) with SMTP id TAJkCgDniOWq4QRmwD8DAA--.28501S4; Thu, 28 Mar 2024 11:19:07 +0800 (CST) From: Shenlin Liang To: anup@brainfault.org, atishp@atishpatra.org, paul.walmsley@sifive.com, palmer@dabbelt.com, aou@eecs.berkeley.edu, kvm@vger.kernel.org, kvm-riscv@lists.infradead.org, linux-riscv@lists.infradead.org, linux-kernel@vger.kernel.org, peterz@infradead.org, mingo@redhat.com, acme@kernel.org, namhyung@kernel.org, mark.rutland@arm.com, alexander.shishkin@linux.intel.com, jolsa@kernel.org, irogers@google.com, adrian.hunter@intel.com, linux-perf-users@vger.kernel.org Cc: Shenlin Liang Subject: [PATCH 0/2] perf kvm: Add kvm stat support on riscv Date: Thu, 28 Mar 2024 03:12:18 +0000 Message-Id: <20240328031220.1287-1-liangshenlin@eswincomputing.com> X-Mailer: git-send-email 2.17.1 X-CM-TRANSID: TAJkCgDniOWq4QRmwD8DAA--.28501S4 X-Coremail-Antispam: 1UD129KBjvJXoW7urWUGrykZr47XF4UZFWxXrb_yoW8KFyUpa y2krn0kws5tFy3Krs3C3WDWrWruws7ur1aqryIyrWUC3y0vryDXF1kKr9FyrZ8JF1UtrWk AF1Dur1rKrW5JaUanT9S1TB71UUUUUJqnTZGkaVYY2UrUUUUjbIjqfuFe4nvWSU5nxnvy2 9KBjDU0xBIdaVrnRJUUUPl14x267AKxVW5JVWrJwAFc2x0x2IEx4CE42xK8VAvwI8IcIk0 rVWrJVCq3wAFIxvE14AKwVWUJVWUGwA2ocxC64kIII0Yj41l84x0c7CEw4AK67xGY2AK02 1l84ACjcxK6xIIjxv20xvE14v26w1j6s0DM28EF7xvwVC0I7IYx2IY6xkF7I0E14v26r4U JVWxJr1l84ACjcxK6I8E87Iv67AKxVW0oVCq3wA2z4x0Y4vEx4A2jsIEc7CjxVAFwI0_Gc CE3s1ln4kS14v26r1Y6r17M2AIxVAIcxkEcVAq07x20xvEncxIr21l5I8CrVACY4xI64kE 6c02F40Ex7xfMcIj6xIIjxv20xvE14v26r1Y6r17McIj6I8E87Iv67AKxVW8JVWxJwAm72 CE4IkC6x0Yz7v_Jr0_Gr1lF7xvr2IYc2Ij64vIr41lF7I21c0EjII2zVCS5cI20VAGYxC7 M4IIrI8v6xkF7I0E8cxan2IY04v7MxkF7I0En4kS14v26r126r1DMxkIecxEwVCm-wCF04 k20xvY0x0EwIxGrwCFx2IqxVCFs4IE7xkEbVWUJVW8JwCFI7km07C267AKxVWUAVWUtwC2 0s026c02F40E14v26r1j6r18MI8I3I0E7480Y4vE14v26r106r1rMI8E67AF67kF1VAFwI 0_GFv_WrylIxkGc2Ij64vIr41lIxAIcVC0I7IYx2IY67AKxVWUCVW8JwCI42IY6xIIjxv2 0xvEc7CjxVAFwI0_Gr0_Cr1lIxAIcVCF04k26cxKx2IYs7xG6r1j6r1xMIIF0xvEx4A2js IE14v26r4j6F4UMIIF0xvEx4A2jsIEc7CjxVAFwI0_Gr0_Gr1UYxBIdaVFxhVjvjDU0xZF pf9x0JUxMa5UUUUU= X-CM-SenderInfo: xold0whvkh0z1lq6v25zlqu0xpsx3x1qjou0bp/ X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20240327_202023_972309_D81C432B X-CRM114-Status: UNSURE ( 8.20 ) X-CRM114-Notice: Please train this message. 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: , MIME-Version: 1.0 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 '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. 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 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_riscv.h | 60 ++++++++++++++ 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 | 78 +++++++++++++++++++ .../arch/riscv/util/riscv_exception_types.h | 41 ++++++++++ 6 files changed, 188 insertions(+) create mode 100644 arch/riscv/kvm/trace_riscv.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