[PATCH v4 10/10] perf tests: implement Zstd comp/decomp integration test

[Alexey Budankov]

Implemented basic integration test for Zstd based trace
compression/decompression in record and report modes.

Signed-off-by: Alexey Budankov <alexey.budankov@xxxxxxxxxxxxxxx>
---
 .../tests/shell/record+zstd_comp_decomp.sh    | 28 +++++++++++++++++++
 1 file changed, 28 insertions(+)
 create mode 100755 tools/perf/tests/shell/record+zstd_comp_decomp.sh

diff --git a/tools/perf/tests/shell/record+zstd_comp_decomp.sh b/tools/perf/tests/shell/record+zstd_comp_decomp.sh
new file mode 100755
index 000000000000..5cb2ab8e2112
--- /dev/null
+++ b/tools/perf/tests/shell/record+zstd_comp_decomp.sh
@@ -0,0 +1,28 @@
+#!/bin/sh
+# record trace Zstd compression/decompression
+
+trace_file=$(mktemp /tmp/perf.data.XXX)
+perf_tool=perf
+output=/dev/null
+
+skip_if_no_z_record() {
+	$perf_tool record -h 2>&1 | grep '\-z, \-\-compression\-level <n>'
+}
+
+collect_z_record() {
+	echo "Collecting compressed record trace file:"
+	$perf_tool record -o $trace_file -a -z 1 -F 25000 -e cycles -- \
+		dd count=2000 if=/dev/random of=/dev/null > $output 2>&1
+}
+
+check_compressed_stats() {
+	echo "Checking compressed events stats:"
+	$perf_tool report -i $trace_file --header --stats | \
+		grep -E "(# compressed : Zstd,)|(COMPRESSED events:)" > $output 2>&1
+}
+
+skip_if_no_z_record || exit 2
+collect_z_record && check_compressed_stats
+err=$?
+rm -f $trace_file
+exit $err