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 0A2B3CA0EDB for ; Tue, 12 Aug 2025 12:36:31 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:Content-Type: Content-Transfer-Encoding:MIME-Version: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=dv4fLrK0UOHhQkLWBMb22z6/gxmtyVbH/9nqZ3efXTQ=; b=veT73G6+BVAs6gdT6Y+AKdfk7t irbN/aaFAexDaBC03Y40NwNE77EdS1wbpX6tSuYQXnnv9/TVGCdqlkiW+OCnYmZiHpe/u7WXlF+NH YfmESSSrryGV2/GWF0IM3Spkcqpkce1uho7YGzVCYWAnA2nMqOttQ1hpidwS+cp2J5G26ETfWOxKl 07eAeU7eR5+Q+xMKdoQQSK0/dRebUSbLzFKA4yu6HSFHKUmc164B3yfRz+zbR0KpbQBWB9rCKEB6U bJkpmQaY2PDUC+stYVCnqGvbZEhMZRGnQpo4h5DUbG5qV/d/JS5jAPCGwOEP5Pqcxywe6iKPBmBBZ jEeKKVBQ==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98.2 #2 (Red Hat Linux)) id 1uloEn-0000000Ahuw-0nPC; Tue, 12 Aug 2025 12:36:21 +0000 Received: from szxga04-in.huawei.com ([45.249.212.190]) by bombadil.infradead.org with esmtps (Exim 4.98.2 #2 (Red Hat Linux)) id 1ulk3j-0000000ACai-2htp for linux-arm-kernel@lists.infradead.org; Tue, 12 Aug 2025 08:08:41 +0000 Received: from mail.maildlp.com (unknown [172.19.162.112]) by szxga04-in.huawei.com (SkyGuard) with ESMTP id 4c1PFr71hTz2TT3c; Tue, 12 Aug 2025 16:05:52 +0800 (CST) Received: from dggemv705-chm.china.huawei.com (unknown [10.3.19.32]) by mail.maildlp.com (Postfix) with ESMTPS id CB220140230; Tue, 12 Aug 2025 16:08:31 +0800 (CST) Received: from kwepemq200018.china.huawei.com (7.202.195.108) by dggemv705-chm.china.huawei.com (10.3.19.32) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.1544.11; Tue, 12 Aug 2025 16:08:31 +0800 Received: from DESKTOP-VM4LOUJ.huawei.com (10.67.121.177) by kwepemq200018.china.huawei.com (7.202.195.108) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.1544.11; Tue, 12 Aug 2025 16:08:30 +0800 From: Yicong Yang To: , , CC: , , , , , , , , , Subject: [PATCH 0/2] perf: arm_pmuv3: Don't use PMCCNTR_EL0 on SMT cores Date: Tue, 12 Aug 2025 16:08:28 +0800 Message-ID: <20250812080830.20796-1-yangyicong@huawei.com> X-Mailer: git-send-email 2.31.0 MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Content-Type: text/plain X-Originating-IP: [10.67.121.177] X-ClientProxiedBy: kwepems500002.china.huawei.com (7.221.188.17) To kwepemq200018.china.huawei.com (7.202.195.108) X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20250812_010839_832169_D6DC0D5D X-CRM114-Status: UNSURE ( 6.73 ) X-CRM114-Notice: Please train this message. X-BeenThere: linux-arm-kernel@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-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org From: Yicong Yang This patchset fixed CPU_CYCLES counting on SMT system. CPU_CYCLES can use PMCCNTR_EL0 which will count the hardware processor clock rather than the PE clock (ARM DDI0487 L.b D13.1.3) on SMT cores which fails the users expectation as CPU_CYCLES (0x0011) is defined to count on each PE cycles. Fix this by avoid using PMCCNTR_EL0 on SMT cores when counting CPU_CYCLES. Yicong Yang (2): perf: arm_pmuv3: Factor out PMCCNTR_EL0 use conditions perf: arm_pmuv3: Don't use PMCCNTR_EL0 on SMT cores drivers/perf/arm_pmuv3.c | 39 +++++++++++++++++++++++++++++++++++++-- 1 file changed, 37 insertions(+), 2 deletions(-) -- 2.24.0