From patchwork Fri Jun 28 07:51:40 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Atish Patra X-Patchwork-Id: 13715678 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 44B85C30659 for ; Fri, 28 Jun 2024 07:52:22 +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:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:Cc:To:MIME-Version:Message-Id:Date: Subject: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=TZNDq2bZqd2UYSclBm9NDHgfDfLI2Dq2z6+909RqHpg=; b=oSG+qMXrvniYnH b5nAqFNm4QUS2a5pedwFLDl5MkHsQN/cn2eGdYK5OX3zShZ6fY5aQNGfKUKG6RdEb8AonJgg18IOy hzugMynZxbWk27jsoUJ3I6ogrHGoDi7af+UAZmJIQvPuXXCyD1ni/nYk66BIe0fGErxjL4gwDNvhs Pryb3U2HfZ0zDDIcrBh1dK0H0a4Jnq8g34PHz4gmOCiHesdBBd4I0mlVN30SqWOh/l+EgsZflgR1S Y0peyuch/RAFS7cS5/R0OyRJXqutWuW+SuCD73+FYTzSms/IiSTWfwd9/65Jn1gTOmqJAE0T2Ml+M WjRm9ew4Rkq3nQLS7QCQ==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.97.1 #2 (Red Hat Linux)) id 1sN6P2-0000000CxSV-0EN6; Fri, 28 Jun 2024 07:52:16 +0000 Received: from mail-oo1-xc2a.google.com ([2607:f8b0:4864:20::c2a]) by bombadil.infradead.org with esmtps (Exim 4.97.1 #2 (Red Hat Linux)) id 1sN6Or-0000000CxM0-0rp3 for linux-riscv@lists.infradead.org; Fri, 28 Jun 2024 07:52:07 +0000 Received: by mail-oo1-xc2a.google.com with SMTP id 006d021491bc7-5c2237d7aadso143549eaf.2 for ; Fri, 28 Jun 2024 00:52:04 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=rivosinc-com.20230601.gappssmtp.com; s=20230601; t=1719561123; x=1720165923; darn=lists.infradead.org; h=cc:to:content-transfer-encoding:mime-version:message-id:date :subject:from:from:to:cc:subject:date:message-id:reply-to; bh=Lfk2FSfAfTy7rTZuEBD/W0oaye5LlvyVrrLcE/eP+AI=; b=GgdI2U5ifotiGl1pnTh8OtUskbZqJBje/NNuUmu/mMagvjBgzof2bysBYGkJ7wg3Yg fgb8oR+KXJ0SnHbqlB/piXNAbKvUezDl6FBV0rmhGIoAc3mlSUtLPzdKeNzWIGbzjVmw CmSutOpbBRO/HBFmRX0yi/2WFwqY2BDwN2qaGbZHR23lRPh2rwo9UUatO5lWtkJQCI0v Z5XK3sDxtPPQgxbPVj4VcktrxyOkRfkNOxtZj+cDPWeirKUA/oix4KJigiO1SBno3Bd9 0tAdgk4Lgq2EjIDYC7Zy5T2JDl7wJVdYrW0okNB7Cxcc1E7kEXas5wcYGKmEhfUptaVw OzDA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1719561123; x=1720165923; h=cc:to:content-transfer-encoding:mime-version:message-id:date :subject:from:x-gm-message-state:from:to:cc:subject:date:message-id :reply-to; bh=Lfk2FSfAfTy7rTZuEBD/W0oaye5LlvyVrrLcE/eP+AI=; b=WIh+C89591rLqM7bo5w4fUP1py3cD5KjwV+MkT36tB8XppiUUpCkCBoDqWCdWMOtjy hDL6xfW7ZwwVwOC1s86U7OVn5lhG8knqrZAm3+ZCstIdxd3O5iNWFgPwwXSkNqmLFS0o kMkg2H0QXRQbU9k8DfoxOb/kXi8WawfwjuuA9kGYs7JUwYAtRruR1V2NjXYRa+9M6heu yI4hW1s7oJRYhRSclRFgDcfiqw9Qc2nI/bdwTKynt9qhhcrFjgsZGwQcBbSQ0CTdrkvp 3JYjLWwVaxXOJp7e4iYwa7KNN9+MB/PmKaqnyU35r9CHkQT/4tIE7SaTyQGVZKnHNEDW w2mw== X-Gm-Message-State: AOJu0YyBhA22PUXBnZKOp8tjV4xANUScUkWFL/RAa8G71FwbT9IplPxJ SlIsJ5gy6w/OYvw99V3hMJon2xyVLrOI8LHAoa9cVcd7kJIjmJzfKX1jPCVToeM= X-Google-Smtp-Source: AGHT+IGJY3zwz2Dh3ONBt7zBT44037cWL19x8gYpDsscR2++QxJYS7DFgyh8r/X4g1UFT/8YlTY5Ng== X-Received: by 2002:a05:6358:9497:b0:1a6:5ef1:c372 with SMTP id e5c5f4694b2df-1a65ef1c9c7mr603886655d.26.1719561123194; Fri, 28 Jun 2024 00:52:03 -0700 (PDT) Received: from atishp.ba.rivosinc.com ([64.71.180.162]) by smtp.gmail.com with ESMTPSA id 41be03b00d2f7-72c69b53bf2sm685068a12.2.2024.06.28.00.52.01 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 28 Jun 2024 00:52:02 -0700 (PDT) From: Atish Patra Subject: [PATCH v4 0/3] Assorted fixes in RISC-V PMU driver Date: Fri, 28 Jun 2024 00:51:40 -0700 Message-Id: <20240628-misc_perf_fixes-v4-0-e01cfddcf035@rivosinc.com> MIME-Version: 1.0 X-B4-Tracking: v=1; b=H4sIAIxrfmYC/2WNwQrCMBBEf6Xs2UhImho8+R+llJps7B7alKwEp eTfjQVPHt8Mb2YHxkTIcG12SJiJKa4V2lMDbp7WBwrylUFJ1cpOGbEQu3HDFMZAL2RhnLkEY4y 3ykK1toRHUaV+qDwTP2N6HwdZf9PfVve3lbWQwqMOFr21frrfEuXItLqziwsMpZQPn0Cn3bEAA AA= To: linux-riscv@lists.infradead.org, kvm-riscv@lists.infradead.org Cc: Atish Patra , Anup Patel , Will Deacon , Mark Rutland , Paul Walmsley , Palmer Dabbelt , Andrew Jones , Conor Dooley , Samuel Holland , Palmer Dabbelt , Alexandre Ghiti , linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, kvm@vger.kernel.org, Atish Patra , garthlei@pku.edu.cn X-Mailer: b4 0.15-dev-13183 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20240628_005205_488223_1C0474B4 X-CRM114-Status: GOOD ( 14.23 ) 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: , Sender: "linux-riscv" Errors-To: linux-riscv-bounces+linux-riscv=archiver.kernel.org@lists.infradead.org This series contains 3 fixes out of which the first one is a new fix for invalid event data reported in lkml[2]. The last two are v3 of Samuel's patch[1]. I added the RB/TB/Fixes tag and moved 1 unrelated change to its own patch. I also changed an error message in kvm vcpu_pmu from pr_err to pr_debug to avoid redundant failure error messages generated due to the boot time quering of events implemented in the patch[1] Here is the original cover letter for the patch[1] Before this patch: $ perf list hw List of pre-defined events (to be used in -e or -M): branch-instructions OR branches [Hardware event] branch-misses [Hardware event] bus-cycles [Hardware event] cache-misses [Hardware event] cache-references [Hardware event] cpu-cycles OR cycles [Hardware event] instructions [Hardware event] ref-cycles [Hardware event] stalled-cycles-backend OR idle-cycles-backend [Hardware event] stalled-cycles-frontend OR idle-cycles-frontend [Hardware event] $ perf stat -ddd true Performance counter stats for 'true': 4.36 msec task-clock # 0.744 CPUs utilized 1 context-switches # 229.325 /sec 0 cpu-migrations # 0.000 /sec 38 page-faults # 8.714 K/sec 4,375,694 cycles # 1.003 GHz (60.64%) 728,945 instructions # 0.17 insn per cycle 79,199 branches # 18.162 M/sec 17,709 branch-misses # 22.36% of all branches 181,734 L1-dcache-loads # 41.676 M/sec 5,547 L1-dcache-load-misses # 3.05% of all L1-dcache accesses LLC-loads (0.00%) LLC-load-misses (0.00%) L1-icache-loads (0.00%) L1-icache-load-misses (0.00%) dTLB-loads (0.00%) dTLB-load-misses (0.00%) iTLB-loads (0.00%) iTLB-load-misses (0.00%) L1-dcache-prefetches (0.00%) L1-dcache-prefetch-misses (0.00%) 0.005860375 seconds time elapsed 0.000000000 seconds user 0.010383000 seconds sys After this patch: $ perf list hw List of pre-defined events (to be used in -e or -M): branch-instructions OR branches [Hardware event] branch-misses [Hardware event] cache-misses [Hardware event] cache-references [Hardware event] cpu-cycles OR cycles [Hardware event] instructions [Hardware event] $ perf stat -ddd true Performance counter stats for 'true': 5.16 msec task-clock # 0.848 CPUs utilized 1 context-switches # 193.817 /sec 0 cpu-migrations # 0.000 /sec 37 page-faults # 7.171 K/sec 5,183,625 cycles # 1.005 GHz 961,696 instructions # 0.19 insn per cycle 85,853 branches # 16.640 M/sec 20,462 branch-misses # 23.83% of all branches 243,545 L1-dcache-loads # 47.203 M/sec 5,974 L1-dcache-load-misses # 2.45% of all L1-dcache accesses LLC-loads LLC-load-misses L1-icache-loads L1-icache-load-misses dTLB-loads 19,619 dTLB-load-misses iTLB-loads 6,831 iTLB-load-misses L1-dcache-prefetches L1-dcache-prefetch-misses 0.006085625 seconds time elapsed 0.000000000 seconds user 0.013022000 seconds sys Changes in v4: - Added SoB tags. - Improved the commit message in patch 1 - Link to v3: https://lore.kernel.org/r/20240626-misc_perf_fixes-v3-0-de3f8ed88dab@rivosinc.com Changes in v3: - Added one more fix - Separated an unrelated change to its own patch. - Rebase and Added RB/TB/Fixes tag. - Changed a error message in kvm code to avoid unnecessary failures at guest booting. Changes in v2: - Move the event checking to a workqueue to make it asynchronous - Add more details to the commit message based on the v1 discussion [1] https://lore.kernel.org/linux-riscv/20240418014652.1143466-1-samuel.holland@sifive.com/ [2] https://lore.kernel.org/all/CC51D53B-846C-4D81-86FC-FBF969D0A0D6@pku.edu.cn/ Signed-off-by: Atish Patra --- Atish Patra (1): drivers/perf: riscv: Do not update the event data if uptodate Samuel Holland (2): drivers/perf: riscv: Reset the counter to hpmevent mapping while starting cpus perf: RISC-V: Check standard event availability arch/riscv/kvm/vcpu_pmu.c | 2 +- drivers/perf/riscv_pmu.c | 2 +- drivers/perf/riscv_pmu_sbi.c | 44 +++++++++++++++++++++++++++++++++++++++++--- 3 files changed, 43 insertions(+), 5 deletions(-) --- base-commit: 55027e689933ba2e64f3d245fb1ff185b3e7fc81 change-id: 20240625-misc_perf_fixes-5c57f555d828 -- Regards, Atish patra