From patchwork Fri Jan 20 14:36:53 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: James Clark X-Patchwork-Id: 13110027 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 E24BCC05027 for ; Fri, 20 Jan 2023 14:39:01 +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: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=xyIkPyUtyJMpRQYE6UdpxYbbsWTJ+Kr8IMgSiVe702Y=; b=EW65pzeeF+pLB+ Hn2lnMVN0O5y6Ecbl4/bt2IH7fmS6lk2fITSlg6CoC0lxst727RESL1hfuLkSTFCmigHvTpX2SMK7 kQ6fhOPcUCg5L+EHLfV4L30xAbi2dDDwrFmQAfkRJ64X0SymQKJruG6pbhDKTqEqcU7DmysukP7BW urCQRuLTRg09MZk8fR2C7DFU2vETX9lw/ChjRe79qHKPYnimeSZm6yvPox4wpZio3TmIN1pRw/pN1 t+QhklA7TbJKYTVuTShjX9qwTDezWMIS0KRi131rZKCaw/TXk6/WHLv3Q6KionJaGEDXAiOdw1ooK LPaegU+H2rMxUMvOA17g==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1pIsWl-00AkIk-Ol; Fri, 20 Jan 2023 14:37:59 +0000 Received: from foss.arm.com ([217.140.110.172]) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1pIsWi-00AkHn-3M for linux-arm-kernel@lists.infradead.org; Fri, 20 Jan 2023 14:37:58 +0000 Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.121.207.14]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id 1F3C514BF; Fri, 20 Jan 2023 06:38:34 -0800 (PST) Received: from e126815.warwick.arm.com (e126815.arm.com [10.32.32.26]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPA id 914173F67D; Fri, 20 Jan 2023 06:37:49 -0800 (PST) From: James Clark To: linux-perf-users@vger.kernel.org, tanmay@marvell.com, leo.yan@linaro.org, mike.leach@linaro.org Cc: sgoutham@marvell.com, gcherian@marvell.com, lcherian@marvell.com, bbhushan2@marvell.com, James Clark , Mathieu Poirier , Suzuki K Poulose , John Garry , Will Deacon , Peter Zijlstra , Ingo Molnar , Arnaldo Carvalho de Melo , Mark Rutland , Alexander Shishkin , Jiri Olsa , Namhyung Kim , coresight@lists.linaro.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org Subject: [PATCH v5 0/8] perf cs_etm: Basic support for virtual/kernel timestamps Date: Fri, 20 Jan 2023 14:36:53 +0000 Message-Id: <20230120143702.4035046-1-james.clark@arm.com> X-Mailer: git-send-email 2.25.1 MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20230120_063756_320559_8CB1ABD6 X-CRM114-Status: GOOD ( 11.41 ) 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 Changes since v4: * Rebase onto perf/core * Convert new perf_pmu__cpu_slots_per_cycle() function to use new helper functions =========================== Changes since v3: * Scale time estimates by INSTR_PER_NS, rather than assuming 1 instruction = 1ns * Add a new commit that fixes some issues around timestamps going backwards * Use nanoseconds inside cs-etm-decoder.c, rather than storing the raw time values and converting when a sample is synthesized. This simplifies some of the code like estimating the first timestamp. =========================== Changes since v2: * Remove const to non-const change and copy strings where needed instead. * Use sizeof() instead of PATH_MAX * Append "will not be set accurately." to new error message * Remove unneeded stat() call * Rebase on perf/core ========================== Changes since v1: * Add 3 refactor commits for sysfs reading around pmu.c as suggested by Arnaldo here [1] * The dependency on [2] has now reached mainline so is no longer blocking * Rebase on perf/core [1]: https://lore.kernel.org/all/YnqVqq5QW%2Fb14oPZ@kernel.org/ [2]: https://lore.kernel.org/all/20220503123537.1003035-1-german.gomez@arm.com/ German Gomez (4): perf pmu: Add function to check if a pmu file exists perf cs_etm: Keep separate symbols for ETMv4 and ETE parameters perf cs_etm: Record ts_source in AUXTRACE_INFO for ETMv4 and ETE perf cs_etm: Set the time field in the synthetic samples James Clark (4): perf: Remove duplication around EVENT_SOURCE_DEVICE_PATH perf: Use perf_pmu__open_file() and perf_pmu__scan_file() perf: Remove remaining duplication of bus/event_source/devices/... perf: cs-etm: Ensure that Coresight timestamps don't go backwards tools/perf/arch/arm/util/auxtrace.c | 5 +- tools/perf/arch/arm/util/cs-etm.c | 91 ++++++++- tools/perf/arch/arm64/util/pmu.c | 4 +- tools/perf/arch/x86/util/pmu.c | 12 +- tools/perf/util/cputopo.c | 9 +- tools/perf/util/cs-etm-base.c | 34 +++- .../perf/util/cs-etm-decoder/cs-etm-decoder.c | 68 +++++-- tools/perf/util/cs-etm.c | 95 +++++++++- tools/perf/util/cs-etm.h | 16 +- tools/perf/util/pmu-hybrid.c | 27 +-- tools/perf/util/pmu.c | 177 +++++++----------- tools/perf/util/pmu.h | 10 +- 12 files changed, 351 insertions(+), 197 deletions(-) base-commit: 1962ab6f6e0b39e4216206205bda14aff87705f3 prerequisite-patch-id: 9722bf86e3e6d16d177ff9a1411992a795a7dcbd prerequisite-patch-id: b05dbef439c2ea8465f3321532257b0ca29f21f9 prerequisite-patch-id: 92680a4781cbcf010fcb007e6ea030f59e9eaefc prerequisite-patch-id: 8e3a73a04e4b89b503377b5fac1d89d551159393 prerequisite-patch-id: 09980d8fedcdaa70b220a7802428109f48448a58 Acked-by: Suzuki K Poulose Tested-by: Tanmay Jagdale