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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id E3497C433FE for ; Tue, 23 Nov 2021 22:48:33 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229580AbhKWWvl (ORCPT ); Tue, 23 Nov 2021 17:51:41 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:37632 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S239776AbhKWWvi (ORCPT ); Tue, 23 Nov 2021 17:51:38 -0500 Received: from mail-pj1-x104a.google.com (mail-pj1-x104a.google.com [IPv6:2607:f8b0:4864:20::104a]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 25D17C061714 for ; Tue, 23 Nov 2021 14:48:30 -0800 (PST) Received: by mail-pj1-x104a.google.com with SMTP id jx2-20020a17090b46c200b001a62e9db321so357272pjb.7 for ; Tue, 23 Nov 2021 14:48:30 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20210112; h=date:in-reply-to:message-id:mime-version:references:subject:from:to :cc; bh=FMQLoym76yTY3cbbWiDyiD1lX2+hK6fXMJaMyVRGwOw=; b=Qbe0vA6gXGRBxEWwQZqgRTy/OZEtHuCAGqQ7pNGzYR6IB+q8JCqZOQL/bOjUuAOQsi 9G7LepeCCyAkTA/zt/8HYjze+pZcQ035u7Peuxtbc7fa9xNOEt8Mz0tiCelgkpR6kqJV UVJ5SvOg8gA0GldDP3anDljKbbPj3wtXcjQnsWvML3456LfOGdw2JVcRAHN7AuGYXHYP /+JEX7HJ/nlGIjRF53S7R732iyTEYq1m2dkLi/FGdpGlKXSqjGNOz8F77+8jdOupQgUr fjLqnIA+2kfVRyYIMePCc73YfrudYzHFvOJnopfnhHX5cCIKkr8BPtUIye/sxTFQSXyc D8Og== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:date:in-reply-to:message-id:mime-version :references:subject:from:to:cc; bh=FMQLoym76yTY3cbbWiDyiD1lX2+hK6fXMJaMyVRGwOw=; b=eKYVlI+yJZ88sdfoGwyRfxTdNhyE0rbhzaYgkzy3R/ajTKgqi+XfNDIPv6W6AQ/Pvx 4gch9jfAr9nrxf8d2WwyPiLwxnHKdXLgMNj48V9Kvar/HumC54X3fu+dR6Z1CyfC2RLs mVWopV60GDNo1WWcMlKbT2ivsi/EZkfyUuTK4SzOcgGdL56osioPI9NfbDBNDeWclD2Z NUn2O9Q/bIi68n7krmX0Kljqe4HYMvWcuJnSnXBhSX/Svpp3qzZ4uBPJadWdfmnylBeM PkI3XUKQrYlrdzwr7tyFoTzm5qC/L7BupsUK+2NWYNCpA0r94tdjNPkn+CLFUlaO09FI BEgA== X-Gm-Message-State: AOAM530OiwKQg/Xd1hqHpGq4lc20HOruTad2VzZ4ZmRSg8azWn2rHVPL gSVfqjHbPZAXpXlinnFU33AkoXDq0Lj7 X-Google-Smtp-Source: ABdhPJys4YEAse8Egj+M2QQAIbNTekARl8nB+PnwPM6IUT1E1yXSQ67yY1azYo+Kxe+hR4KQUT2B58VkJjiw X-Received: from irogers.svl.corp.google.com ([2620:15c:2cd:202:dbab:a6fe:1e3a:91fa]) (user=irogers job=sendgmr) by 2002:a17:903:11cd:b0:143:d220:fdd8 with SMTP id q13-20020a17090311cd00b00143d220fdd8mr11605843plh.79.1637707709588; Tue, 23 Nov 2021 14:48:29 -0800 (PST) Date: Tue, 23 Nov 2021 14:48:21 -0800 In-Reply-To: <20211123224821.3258649-1-irogers@google.com> Message-Id: <20211123224821.3258649-3-irogers@google.com> Mime-Version: 1.0 References: <20211123224821.3258649-1-irogers@google.com> X-Mailer: git-send-email 2.34.0.rc2.393.gf8c9666880-goog Subject: [PATCH 3/3] perf tools: Probe non-deprecated sysfs path 1st From: Ian Rogers To: Andi Kleen , Jiri Olsa , Namhyung Kim , John Garry , Kajol Jain , "Paul A . Clarke" , Arnaldo Carvalho de Melo , Kan Liang , Peter Zijlstra , Ingo Molnar , Mark Rutland , Alexander Shishkin , Konstantin Khlebnikov , linux-perf-users@vger.kernel.org, linux-kernel@vger.kernel.org Cc: eranian@google.com, Ian Rogers Content-Type: text/plain; charset="UTF-8" Precedence: bulk List-ID: X-Mailing-List: linux-perf-users@vger.kernel.org Following Documentation/ABI/stable/sysfs-devices-system-cpu the /sys/devices/system/cpu/cpuX/topology/core_cpus is deprecated in favor of thread_siblings, so probe thread_siblings before falling back on core_cpus. Signed-off-by: Ian Rogers --- tools/perf/util/smt.c | 5 ++--- 1 file changed, 2 insertions(+), 3 deletions(-) diff --git a/tools/perf/util/smt.c b/tools/perf/util/smt.c index 2636be65305a..2b0a36ebf27a 100644 --- a/tools/perf/util/smt.c +++ b/tools/perf/util/smt.c @@ -79,11 +79,10 @@ int smt_on(void) char fn[256]; snprintf(fn, sizeof fn, - "devices/system/cpu/cpu%d/topology/core_cpus", cpu); + "devices/system/cpu/cpu%d/topology/thread_siblings", cpu); if (sysfs__read_str(fn, &str, &strlen) < 0) { snprintf(fn, sizeof fn, - "devices/system/cpu/cpu%d/topology/thread_siblings", - cpu); + "devices/system/cpu/cpu%d/topology/core_cpus", cpu); if (sysfs__read_str(fn, &str, &strlen) < 0) continue; } -- 2.34.0.rc2.393.gf8c9666880-goog