From patchwork Mon Jun 3 19:07:31 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Steven Rostedt X-Patchwork-Id: 13684228 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id AC31413D533; Mon, 3 Jun 2024 19:07:14 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1717441634; cv=none; b=H7RmO7s9v6U9E3TfQzxqsvopvPEuD8lwynJCMbf8gCpyg0PBkHT+OX2nJmBT2R8193QzzIHGEfQUxtazcrCsBwN+wi3eyCCzk++mKkrdZ9xw82rKBkM3+eWuX5RljlC/OKMRswbmHH7XkO5TCSOWHiQ/7a2ogfvEFYzaotPSTEI= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1717441634; c=relaxed/simple; bh=k1HP8hCmLs5gvyhDOaCFwFm3nHs+PuYGEdirt95Vwq8=; h=Message-ID:Date:From:To:Cc:Subject:References:MIME-Version: Content-Type; b=IlETiHMohi+q3ig8Q4k1M2/E6vG+3evuC+I4sl0SFOMbjeMDsJ09vMzRQ4jfiUXk4xFiJKWHG0VmOM/ncjF5BRsKVVPkil58lcAac90rb757K42xzQJDAUXLe5krUtut3I8rTJ47JS3mYWxmK4IG6x6XG2XgDxb/2JO/B1cRJIQ= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 Received: by smtp.kernel.org (Postfix) with ESMTPSA id 590F4C4AF07; Mon, 3 Jun 2024 19:07:14 +0000 (UTC) Received: from rostedt by gandalf with local (Exim 4.97) (envelope-from ) id 1sED2f-00000009TzS-1dXK; Mon, 03 Jun 2024 15:08:25 -0400 Message-ID: <20240603190825.252845939@goodmis.org> User-Agent: quilt/0.68 Date: Mon, 03 Jun 2024 15:07:31 -0400 From: Steven Rostedt To: linux-kernel@vger.kernel.org, linux-trace-kernel@vger.kernel.org Cc: Masami Hiramatsu , Mark Rutland , Mathieu Desnoyers , Andrew Morton , Alexei Starovoitov , Florent Revest , Martin KaFai Lau , bpf , Sven Schnelle , Alexei Starovoitov , Jiri Olsa , Arnaldo Carvalho de Melo , Daniel Borkmann , Alan Maguire , Peter Zijlstra , Thomas Gleixner , Guo Ren Subject: [PATCH v3 27/27] selftests/ftrace: Add fgraph-multi.tc test References: <20240603190704.663840775@goodmis.org> Precedence: bulk X-Mailing-List: linux-trace-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 From: "Steven Rostedt (Google)" Add a test that creates 3 instances and enables function_graph tracer in each as well as the top instance, where each will enable a filter (but one that traces all functions) and check that they are filtering properly. Signed-off-by: Steven Rostedt (Google) --- .../ftrace/test.d/ftrace/fgraph-multi.tc | 103 ++++++++++++++++++ 1 file changed, 103 insertions(+) create mode 100644 tools/testing/selftests/ftrace/test.d/ftrace/fgraph-multi.tc diff --git a/tools/testing/selftests/ftrace/test.d/ftrace/fgraph-multi.tc b/tools/testing/selftests/ftrace/test.d/ftrace/fgraph-multi.tc new file mode 100644 index 000000000000..ff88f97e41fb --- /dev/null +++ b/tools/testing/selftests/ftrace/test.d/ftrace/fgraph-multi.tc @@ -0,0 +1,103 @@ +#!/bin/sh +# SPDX-License-Identifier: GPL-2.0 +# description: ftrace - function graph filters +# requires: set_ftrace_filter function_graph:tracer + +# Make sure that function graph filtering works + +INSTANCE1="instances/test1_$$" +INSTANCE2="instances/test2_$$" +INSTANCE3="instances/test3_$$" + +WD=`pwd` + +do_reset() { + cd $WD + if [ -d $INSTANCE1 ]; then + echo nop > $INSTANCE1/current_tracer + rmdir $INSTANCE1 + fi + if [ -d $INSTANCE2 ]; then + echo nop > $INSTANCE2/current_tracer + rmdir $INSTANCE2 + fi + if [ -d $INSTANCE3 ]; then + echo nop > $INSTANCE3/current_tracer + rmdir $INSTANCE3 + fi +} + +mkdir $INSTANCE1 +if ! grep -q function_graph $INSTANCE1/available_tracers; then + echo "function_graph not allowed with instances" + rmdir $INSTANCE1 + exit_unsupported +fi + +mkdir $INSTANCE2 +mkdir $INSTANCE3 + +fail() { # msg + do_reset + echo $1 + exit_fail +} + +disable_tracing +clear_trace + +do_test() { + REGEX=$1 + TEST=$2 + + # filter something, schedule is always good + if ! echo "$REGEX" > set_ftrace_filter; then + fail "can not enable filter $REGEX" + fi + + echo > trace + echo function_graph > current_tracer + enable_tracing + sleep 1 + # search for functions (has "{" or ";" on the line) + echo 0 > tracing_on + count=`cat trace | grep -v '^#' | grep -e '{' -e ';' | grep -v "$TEST" | wc -l` + echo 1 > tracing_on + if [ $count -ne 0 ]; then + fail "Graph filtering not working by itself against $TEST?" + fi + + # Make sure we did find something + echo 0 > tracing_on + count=`cat trace | grep -v '^#' | grep -e '{' -e ';' | grep "$TEST" | wc -l` + echo 1 > tracing_on + if [ $count -eq 0 ]; then + fail "No traces found with $TEST?" + fi +} + +do_test '*sched*' 'sched' +cd $INSTANCE1 +do_test '*lock*' 'lock' +cd $WD +cd $INSTANCE2 +do_test '*rcu*' 'rcu' +cd $WD +cd $INSTANCE3 +echo function_graph > current_tracer + +sleep 1 +count=`cat trace | grep -v '^#' | grep -e '{' -e ';' | grep "$TEST" | wc -l` +if [ $count -eq 0 ]; then + fail "No traces found with all tracing?" +fi + +cd $WD +echo nop > current_tracer +echo nop > $INSTANCE1/current_tracer +echo nop > $INSTANCE2/current_tracer +echo nop > $INSTANCE3/current_tracer + +do_reset + +exit 0