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 5B4F7CA5FF0 for ; Sun, 4 Oct 2026 22:09:47 +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-Transfer-Encoding: Content-Type:MIME-Version:References:In-Reply-To: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:List-Owner; bh=CIysZCZmDY+hsmraxBJHQH/HCXeMIwx5nXj3FwnpnSI=; b=o4PSMAxxGuX+EVwULsKJ1pvl9S r8I8bhOWPYxlevubvm9puq4oWGTOdufL6EEmU/Hy6Hhd3OP/uNghrAe4WvZH3kgQxAdmEx7aepZZZ xBBwZnSPrLLlQRVrhLFwwHUpZtpi9n/Nx/u2rzq7djSkAG0m1ehWQDnBX3dfsf4g0zUPNhaquPNfT NwPeYZ5IrZ/T89KYYSApZ0M5IyAFYSS7wg1GPSePLv+1pLPUD969hzIbM+Sbn3tsY5xYlWSZCefIO FEie8sPMHw9zQzgxEpnKzghVzva9AJnoxpvTZptq2TRHXPqqY3DgRlCJk25YVx69eeUAqI27aD0Wh WfOS0jsw==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.99.1 #2 (Red Hat Linux)) id 1xDUOr-0000000FP9N-0El2; Sun, 04 Oct 2026 22:09:41 +0000 Received: from sea.source.kernel.org ([2600:3c0a:e001:78e:0:1991:8:25]) by bombadil.infradead.org with esmtps (Exim 4.99.1 #2 (Red Hat Linux)) id 1xDUOp-0000000FP98-2rru for linux-arm-kernel@lists.infradead.org; Sun, 04 Oct 2026 22:09:39 +0000 Received: from smtp.kernel.org (quasi.space.kernel.org [100.103.45.18]) by sea.source.kernel.org (Postfix) with ESMTP id 22C96444F3; Sun, 4 Oct 2026 22:09:39 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id BCDDA1F00893; Sun, 4 Oct 2026 22:09:35 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1791151779; bh=CIysZCZmDY+hsmraxBJHQH/HCXeMIwx5nXj3FwnpnSI=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=RbZJVM4aJi45z4MD6FnfIIwGAZCzBlIK2SKaDsBl8ypr7Tk53Qis+r/5UedLY+0Xa 5MTaU7LSg0MsWm8HkKGlPyaOZM0MoHliMPdi3TZiG88ToSEOT+u4DjhSNXqjv6LcZ8 aBgZM3o9PVTKNHRHvUoRRmtZCV42Z2Bf2O0Aq0OF6NnRsndGAIx86Tpm1iEAmS3kCF FbmPZZW2KdsFJ6nU6fu0Y2U5ff4DmLaeJiboUxUdXZ9oj4pGagrE+AdN9Idyp0pSpZ tDGr4geVL0YIiwGrIZCFVjzJgUmup98Ibw7OQf+JxYbrCk0tNgDh87JN8DCFuEZHaV c4Rqs044oq/rQ== From: Will Deacon To: Peter Zijlstra , Ingo Molnar , Suzuki K Poulose , Mark Rutland , Adrian Hunter , James Clark , Mike Leach , Tamas Petz , Tamas Zsoldos , Leo Yan Cc: catalin.marinas@arm.com, kernel-team@android.com, Will Deacon , linux-perf-users@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, coresight@lists.linaro.org Subject: Re: [PATCH 0/3] perf: Suppress redundant ITRACE start records for Arm SPE and CoreSight Date: Sun, 4 Oct 2026 23:09:16 +0100 Message-ID: <179113376395.1496517.2313914567669442516.b4-ty@kernel.org> X-Mailer: git-send-email 2.47.3 In-Reply-To: <20260901-perf_suppress_itrace_start_records-v1-0-c4fbc6860859@arm.com> References: <20260901-perf_suppress_itrace_start_records-v1-0-c4fbc6860859@arm.com> MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 8bit 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 On Tue, 01 Sep 2026 17:36:14 +0100, Leo Yan wrote: > Thanks to Tamas Petz for noticing that Arm CoreSight perf data can contain > many PERF_RECORD_ITRACE_START records. > > PERF_RECORD_ITRACE_START provides the decoder with the initial thread > context when that information is absent from the trace stream. Once > tracing has started, Arm SPE and CoreSight decoders track subsequent > context changes using context packets or recorded sched_switch events. > > [...] Applied to arm64 (for-next/perf), thanks! [1/3] perf/core: Export perf_event_itrace_started() https://git.kernel.org/arm64/c/ce512db53e0d [2/3] perf: arm_spe: Suppress redundant ITRACE start records https://git.kernel.org/arm64/c/87f78017e8c8 [3/3] coresight: perf: Suppress ITRACE start records https://git.kernel.org/arm64/c/8f8301eaa400 Cheers, -- Will https://fixes.arm64.dev https://next.arm64.dev https://will.arm64.dev