From patchwork Sun Jun 23 13:34:37 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Leo Yan X-Patchwork-Id: 13708617 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 63EB2C27C4F for ; Sun, 23 Jun 2024 13:35:17 +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: MIME-Version:References:In-Reply-To:Message-Id:Date:Subject:Cc:To:From: Reply-To:Content-Type:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=W20434XPIZXn7N2nLhopSUnEMxeCMh5y0SHanXxL4nE=; b=qv7yA0/yg5beKH//fgrYKVXldW FdpYTm3ZiUFfdkd1CXFsuuTP/ChhxDXSsD6K98rZjVELayTkUCoPPmfnWIvhawYvJAYpieLPEhmcE b8c+c/1UWYAfrTkgi1KjZtT9UtjojVnU0UPvPon4dzuR3riHsegOXcjwjkzDZqG98uh8DnIJEb1xH qVRXWB+I+40fA2/ZD8HgR8wAVo9EeUuLEsUT5ZziTbx1Pmnve0MSTZL70pzl3hi+ZZzX7mDSZMQ4L Prvohg9fBKlpbSZNB4NcSyakpUOriUHZliyL6f2CzW4DmsqrQgDRmlLGieGTPjTSToKb2ctWvkHzL HQz6CQSA==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.97.1 #2 (Red Hat Linux)) id 1sLNN4-0000000E4Jw-1033; Sun, 23 Jun 2024 13:35:06 +0000 Received: from foss.arm.com ([217.140.110.172]) by bombadil.infradead.org with esmtp (Exim 4.97.1 #2 (Red Hat Linux)) id 1sLNMy-0000000E4Hn-0SJy for linux-arm-kernel@lists.infradead.org; Sun, 23 Jun 2024 13:35:01 +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 815E6168F; Sun, 23 Jun 2024 06:35:23 -0700 (PDT) Received: from e132581.cambridge.arm.com (e132581.arm.com [10.2.76.71]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPA id C1AB93F64C; Sun, 23 Jun 2024 06:34:55 -0700 (PDT) From: Leo Yan To: Arnaldo Carvalho de Melo , James Clark , Suzuki K Poulose , Mike Leach , John Garry , Will Deacon , Peter Zijlstra , Ingo Molnar , Namhyung Kim , Ian Rogers , Mark Rutland , Alexander Shishkin , Adrian Hunter , "Liang, Kan" , Kajol Jain , coresight@lists.linaro.org, linux-arm-kernel@lists.infradead.org, linux-perf-users@vger.kernel.org, linux-kernel@vger.kernel.org Cc: Leo Yan Subject: [PATCH v1 2/2] perf mem: Warn if memory events are not supported on all CPUs Date: Sun, 23 Jun 2024 14:34:37 +0100 Message-Id: <20240623133437.222736-3-leo.yan@arm.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20240623133437.222736-1-leo.yan@arm.com> References: <20240623133437.222736-1-leo.yan@arm.com> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20240623_063500_217406_442839B5 X-CRM114-Status: GOOD ( 13.01 ) 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 It is possible that memory events are not supported on all CPUs. Prints a warning by dumping the enabled CPU maps in this case. Signed-off-by: Leo Yan --- tools/perf/util/mem-events.c | 14 ++++++++++++++ 1 file changed, 14 insertions(+) diff --git a/tools/perf/util/mem-events.c b/tools/perf/util/mem-events.c index 6dda47bb774f..8aff2ca8bbd5 100644 --- a/tools/perf/util/mem-events.c +++ b/tools/perf/util/mem-events.c @@ -8,6 +8,7 @@ #include #include #include +#include "cpumap.h" #include "map_symbol.h" #include "mem-events.h" #include "mem-info.h" @@ -242,6 +243,7 @@ int perf_mem_events__record_args(const char **rec_argv, int *argv_nr) int i = *argv_nr; const char *s; char *copy; + struct perf_cpu_map *cpu_map = NULL; while ((pmu = perf_pmus__scan_mem(pmu)) != NULL) { for (int j = 0; j < PERF_MEM_EVENTS__MAX; j++) { @@ -266,7 +268,19 @@ int perf_mem_events__record_args(const char **rec_argv, int *argv_nr) rec_argv[i++] = "-e"; rec_argv[i++] = copy; + + cpu_map = perf_cpu_map__merge(cpu_map, pmu->cpus); + } + } + + if (cpu_map) { + if (!perf_cpu_map__equal(cpu_map, cpu_map__online())) { + char buf[200]; + + cpu_map__snprint(cpu_map, buf, sizeof(buf)); + pr_warning("Memory events are enabled on a subset of CPUs: %s\n", buf); } + perf_cpu_map__put(cpu_map); } *argv_nr = i;