From nobody Mon Sep 15 04:13:43 2025 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 88A15C3DA78 for ; Sat, 14 Jan 2023 21:53:06 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230493AbjANVxF (ORCPT ); Sat, 14 Jan 2023 16:53:05 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:56408 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230381AbjANVxD (ORCPT ); Sat, 14 Jan 2023 16:53:03 -0500 Received: from mail-yb1-xb4a.google.com (mail-yb1-xb4a.google.com [IPv6:2607:f8b0:4864:20::b4a]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 331F74C10 for ; Sat, 14 Jan 2023 13:53:02 -0800 (PST) Received: by mail-yb1-xb4a.google.com with SMTP id z17-20020a25e311000000b00719e04e59e1so26944549ybd.10 for ; Sat, 14 Jan 2023 13:53:02 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20210112; h=to:from:subject:mime-version:message-id:date:from:to:cc:subject :date:message-id:reply-to; bh=i7LjX5uGK3WCr57lUgDj8dp0DrlckrMoNfjwJB3vyfk=; b=kQY6SCnd86TNsyNs+WGDwOUPyNjEHdmF/oyqGflEr1YCVEUITODKWdmUUkAHBOwUza 33TmnI0SN2oiIjuH1iCYPbGOhlZGBJqzxqU96kGktV0aTI04+beQV0FlyeUv5YBqjoXL KI8UWtDFbdLzcWdMNvqFZuViwArRdqsDsEK+Gc/iM968chXed7e44oDcuya6bdBAwkCr PHZwqBe5ymkO6JleO7dXaAwq+OUR/4QOf7Olgate0sinyx5L5wvsYJ5CM8j0PqWIb929 zfnpaEb3ouKweZo7k8UT3YGdpdDI9uil3Iv+iUopgylQ9qMFOGDjlHUIfg/5tW4QlEaf rMxA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=to:from:subject:mime-version:message-id:date:x-gm-message-state :from:to:cc:subject:date:message-id:reply-to; bh=i7LjX5uGK3WCr57lUgDj8dp0DrlckrMoNfjwJB3vyfk=; b=jdmazxFIsRD1i9pbF5EiXXcZecxXJDAI038IgmaNsb2k9wXgfS5axgZ0dB4uTkCstu UNXgymtIvpiXlTPzPaU7wdKdGzD7ytmiLZJt9MtT3VnWxRLws3kqvAVh6Z7THt2EP4FM c+YtI3fwzYvLVUVaPYiOs7WqIEC2Lgp9sw5EUEjwkijHu/7VdC0bnfB0gKP4hGa16D9i mYFlLZjNBg28MCIWvisSHU8ZlZCSB7mBWwALWr2s6R+7mrpXnOjwVVuKlZ9ybaKsTbJB ycAgnlVxHduXvQ95pm6JRtcU8XhA/Wz0udJK/P8gGHIIbVEAOW4vFpWpcLOzf27mTHFn jVHQ== X-Gm-Message-State: AFqh2krqZzvn08M6Owyk6060KlDjIby9k2KZ7rRlccp7WvJZwNHVDXvn Sjojr0HkQsGAXcWOpaZz2x+ccQhmfHLU X-Google-Smtp-Source: AMrXdXtv1un/Hw8VAb7/hPRFzAnhyGVA4c1ASbv+9wc6xkzoCUeqJ/hQ7n2ILI4AG2sNK0A+0HD6enSVjwSK X-Received: from irogers.svl.corp.google.com ([2620:15c:2d4:203:4b8d:c5ae:877b:4ae6]) (user=irogers job=sendgmr) by 2002:a0d:ea8b:0:b0:4d0:b28:e831 with SMTP id t133-20020a0dea8b000000b004d00b28e831mr2645369ywe.70.1673733181442; Sat, 14 Jan 2023 13:53:01 -0800 (PST) Date: Sat, 14 Jan 2023 13:52:51 -0800 Message-Id: <20230114215251.271678-1-irogers@google.com> Mime-Version: 1.0 X-Mailer: git-send-email 2.39.0.314.g84b9a713c41-goog Subject: [PATCH v1] perf test workload thloop: Make count increments atomic From: Ian Rogers To: Peter Zijlstra , Ingo Molnar , Arnaldo Carvalho de Melo , Mark Rutland , Alexander Shishkin , Jiri Olsa , Namhyung Kim , Ian Rogers , linux-perf-users@vger.kernel.org, linux-kernel@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" The count variable is incremented by multiple threads, doing so without an atomic operation causes thread sanitizer warnings. Switch to using relaxed atomics. Signed-off-by: Ian Rogers --- tools/perf/tests/workloads/thloop.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/tools/perf/tests/workloads/thloop.c b/tools/perf/tests/workloa= ds/thloop.c index 29193b75717e..af05269c2eb8 100644 --- a/tools/perf/tests/workloads/thloop.c +++ b/tools/perf/tests/workloads/thloop.c @@ -20,7 +20,7 @@ static void sighandler(int sig __maybe_unused) noinline void test_loop(void) { while (!done) - count++; + __atomic_fetch_add(&count, 1, __ATOMIC_RELAXED); } =20 static void *thfunc(void *arg) --=20 2.39.0.314.g84b9a713c41-goog