perf test: Replace 'grep | wc -l' with 'grep -c'

To count the number of results from grep, use the '-c' parameter
instead of piping it to 'wc'.

See also https://www.shellcheck.net/wiki/SC2126

Signed-off-by: Diederik de Haas <didi.debian@cknow.org>
Acked-by: Carsten Haitzler <carsten.haitzler@arm.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: https://lore.kernel.org/r/20230201214945.127474-2-didi.debian@cknow.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

diff --git a/tools/perf/tests/shell/lib/coresight.sh b/tools/perf/tests/shell/lib/coresight.sh
index 45a1477..7e27e5c 100644 (file)
--- a/tools/perf/tests/shell/lib/coresight.sh
+++ b/tools/perf/tests/shell/lib/coresight.sh
@@ -58,9 +58,9 @@ perf_dump_aux_verify() {
        # compiler may produce different code depending on the compiler and
        # optimization options, so this is rough just to see if we're
        # either missing almost all the data or all of it
-       ATOM_FX_NUM=`grep I_ATOM_F "$DUMP" | wc -l`
-       ASYNC_NUM=`grep I_ASYNC "$DUMP" | wc -l`
-       TRACE_INFO_NUM=`grep I_TRACE_INFO "$DUMP" | wc -l`
+       ATOM_FX_NUM=`grep -c I_ATOM_F "$DUMP"`
+       ASYNC_NUM=`grep -c I_ASYNC "$DUMP"`
+       TRACE_INFO_NUM=`grep -c I_TRACE_INFO "$DUMP"`
        rm -f "$DUMP"
 
        # Arguments provide minimums for a pass