linux-kernel - [PATCH v1 3/9] perf tests: Avoid fork in perf_has

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Date:   Fri,  1 Dec 2023 15:50:25 -0800
From:   Ian Rogers <irogers@...gle.com>
To:     Peter Zijlstra <peterz@...radead.org>,
        Ingo Molnar <mingo@...hat.com>,
        Arnaldo Carvalho de Melo <acme@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
        Jiri Olsa <jolsa@...nel.org>,
        Namhyung Kim <namhyung@...nel.org>,
        Ian Rogers <irogers@...gle.com>,
        Adrian Hunter <adrian.hunter@...el.com>,
        Nathan Chancellor <nathan@...nel.org>,
        Nick Desaulniers <ndesaulniers@...gle.com>,
        Tom Rix <trix@...hat.com>,
        Ravi Bangoria <ravi.bangoria@....com>,
        James Clark <james.clark@....com>,
        Kan Liang <kan.liang@...ux.intel.com>,
        John Garry <john.g.garry@...cle.com>,
        linux-kernel@...r.kernel.org, linux-perf-users@...r.kernel.org,
        llvm@...ts.linux.dev
Subject: [PATCH v1 3/9] perf tests: Avoid fork in perf_has_symbol test

perf test -vv Symbols is used to indentify symbols within the perf
binary. Add the -F flag so that the test command doesn't fork the test
before running. This removes a little overhead.

Signed-off-by: Ian Rogers <irogers@...gle.com>
---
 tools/perf/tests/shell/lib/perf_has_symbol.sh | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tools/perf/tests/shell/lib/perf_has_symbol.sh b/tools/perf/tests/shell/lib/perf_has_symbol.sh
index 5d59c32ae3e7..561c93b75d77 100644
--- a/tools/perf/tests/shell/lib/perf_has_symbol.sh
+++ b/tools/perf/tests/shell/lib/perf_has_symbol.sh
@@ -3,7 +3,7 @@
 
 perf_has_symbol()
 {
-	if perf test -vv "Symbols" 2>&1 | grep "[[:space:]]$1$"; then
+	if perf test -vv -F "Symbols" 2>&1 | grep "[[:space:]]$1$"; then
 		echo "perf does have symbol '$1'"
 		return 0
 	fi
-- 
2.43.0.rc2.451.g8631bc7472-goog