From patchwork Wed Jun 23 07:04:31 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Krzysztof Kozlowski X-Patchwork-Id: 466100 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-16.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI, SPF_HELO_NONE, SPF_PASS, USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 40C2AC4743C for ; Wed, 23 Jun 2021 07:04:38 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 15BE56102A for ; Wed, 23 Jun 2021 07:04:38 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229964AbhFWHGy (ORCPT ); Wed, 23 Jun 2021 03:06:54 -0400 Received: from youngberry.canonical.com ([91.189.89.112]:49225 "EHLO youngberry.canonical.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229958AbhFWHGx (ORCPT ); Wed, 23 Jun 2021 03:06:53 -0400 Received: from mail-wm1-f71.google.com ([209.85.128.71]) by youngberry.canonical.com with esmtps (TLS1.2) tls TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256 (Exim 4.93) (envelope-from ) id 1lvww7-0000ep-AI for linux-kselftest@vger.kernel.org; Wed, 23 Jun 2021 07:04:35 +0000 Received: by mail-wm1-f71.google.com with SMTP id l9-20020a05600c1d09b02901dc060832e2so222705wms.1 for ; Wed, 23 Jun 2021 00:04:35 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:subject:date:message-id:mime-version :content-transfer-encoding; bh=AH2QL7P4i7gFaUF/ZBeQ7+HlAe6BdfHUYWj4tEHBDgw=; b=f0vgS2vnORWpMdIWe189JZkHHOY6bk8YIvCX13QLfKXHYlhj8F9eKgtWpVKHzgrIuy j+zBjgsZacEJXAo0DSut5mDMLP4i5BvTbScF0OogrmQ/bhabGFGdyiTiP9+Aq5lgF7qt SC0PG9w+Q9VsX2QkOrUMx7J8HH+Fcgj2yQ5Mr5YDFEv4GGXeNlSJb6xeSGerC+gOiq3m HNvYGX2cew3fvek2cAOaE0dh3gycNyXIVBIQSZUBLtsP0LStODkE5I34TyPG/LxlVHmD cT8ircj5rWXWdgQHfGDlg2Bun1wZZ8dDVYopj4kQZYiBaHyiHKFFbP8E24a9RtsxLlgs dH5A== X-Gm-Message-State: AOAM5307YFas8ZgdnLdwH59NxH04CnDo8AtDdu/0Tnij8BOSCzPg7Bqt l+wbcyf1jlUF6CFKpO/MpK6yGdMaPxls0aOKrvnfDKsZ2Nh3y9Fc9HRpkcSSfX0/qjMpMMeTpYT dUB04e5sQ67ndwkPdyQNrYNarkFit+nbD/+zwVuBUh5wCQA== X-Received: by 2002:a5d:504e:: with SMTP id h14mr5042408wrt.273.1624431875015; Wed, 23 Jun 2021 00:04:35 -0700 (PDT) X-Google-Smtp-Source: ABdhPJxMQOpl/2xpkgmzgfvqKIMaW6DBY/obT/oN1U9kV+oY949g+Ewlk2Di9BxmoeJI0KvBPAIhAw== X-Received: by 2002:a5d:504e:: with SMTP id h14mr5042389wrt.273.1624431874854; Wed, 23 Jun 2021 00:04:34 -0700 (PDT) Received: from localhost.localdomain (xdsl-188-155-177-222.adslplus.ch. [188.155.177.222]) by smtp.gmail.com with ESMTPSA id q19sm4529407wmc.44.2021.06.23.00.04.34 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 23 Jun 2021 00:04:34 -0700 (PDT) From: Krzysztof Kozlowski To: Steven Rostedt , Ingo Molnar , Shuah Khan , Krzysztof Kozlowski , linux-kselftest@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH] selftests/ftrace: fix event-no-pid on 1-core machine Date: Wed, 23 Jun 2021 09:04:31 +0200 Message-Id: <20210623070431.16592-1-krzysztof.kozlowski@canonical.com> X-Mailer: git-send-email 2.27.0 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-kselftest@vger.kernel.org When running event-no-pid test on a small machines (e.g. cloud 1-core instance), other events might not happen: + cat trace + cnt=0 + [ 0 -eq 0 ] + fail No other events were recorded [15] event tracing - restricts events based on pid notrace filtering [FAIL] Schedule a simple sleep task to be sure that some other process events get recorder. Fixes: ebed9628f5c2 ("selftests/ftrace: Add test to test new set_event_notrace_pid file") Signed-off-by: Krzysztof Kozlowski Acked-by: Steven Rostedt (VMware) --- .../testing/selftests/ftrace/test.d/event/event-no-pid.tc | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/tools/testing/selftests/ftrace/test.d/event/event-no-pid.tc b/tools/testing/selftests/ftrace/test.d/event/event-no-pid.tc index e6eb78f0b954..9933ed24f901 100644 --- a/tools/testing/selftests/ftrace/test.d/event/event-no-pid.tc +++ b/tools/testing/selftests/ftrace/test.d/event/event-no-pid.tc @@ -57,6 +57,10 @@ enable_events() { echo 1 > tracing_on } +other_task() { + sleep .001 || usleep 1 || sleep 1 +} + echo 0 > options/event-fork do_reset @@ -94,6 +98,9 @@ child=$! echo "child = $child" wait $child +# Be sure some other events will happen for small systems (e.g. 1 core) +other_task + echo 0 > tracing_on cnt=`count_pid $mypid`