linux-kernel - [PATCH v6 8/9] perf test: Add tests for latency and parallelism profiling

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Message-ID: <eb8506dfa5998da3b891ba3d36f7ed4a7db4ca2b.1738928210.git.dvyukov@google.com>
Date: Fri,  7 Feb 2025 12:40:35 +0100
From: Dmitry Vyukov <dvyukov@...gle.com>
To: namhyung@...nel.org, irogers@...gle.com, ak@...ux.intel.com
Cc: linux-perf-users@...r.kernel.org, linux-kernel@...r.kernel.org, 
	Dmitry Vyukov <dvyukov@...gle.com>, Arnaldo Carvalho de Melo <acme@...nel.org>
Subject: [PATCH v6 8/9] perf test: Add tests for latency and parallelism profiling

Ensure basic operation of latency/parallelism profiling and that
main latency/parallelism record/report invocations don't fail/crash.

Signed-off-by: Dmitry Vyukov <dvyukov@...gle.com>
Cc: Namhyung Kim <namhyung@...nel.org>
Cc: Arnaldo Carvalho de Melo <acme@...nel.org>
Cc: Ian Rogers <irogers@...gle.com>
Cc: Andi Kleen <ak@...ux.intel.com>
Cc: linux-perf-users@...r.kernel.org
Cc: linux-kernel@...r.kernel.org
---
 tools/perf/tests/shell/base_report/setup.sh   | 18 ++++++-
 .../tests/shell/base_report/test_basic.sh     | 52 +++++++++++++++++++
 2 files changed, 69 insertions(+), 1 deletion(-)

diff --git a/tools/perf/tests/shell/base_report/setup.sh b/tools/perf/tests/shell/base_report/setup.sh
index b03501b2e8fc5..8634e7e0dda6a 100755
--- a/tools/perf/tests/shell/base_report/setup.sh
+++ b/tools/perf/tests/shell/base_report/setup.sh
@@ -15,6 +15,8 @@
 # include working environment
 . ../common/init.sh
 
+TEST_RESULT=0
+
 test -d "$HEADER_TAR_DIR" || mkdir -p "$HEADER_TAR_DIR"
 
 SW_EVENT="cpu-clock"
@@ -26,7 +28,21 @@ PERF_EXIT_CODE=$?
 CHECK_EXIT_CODE=$?
 
 print_results $PERF_EXIT_CODE $CHECK_EXIT_CODE "prepare the perf.data file"
-TEST_RESULT=$?
+(( TEST_RESULT += $? ))
+
+# Some minimal parallel workload.
+$CMD_PERF record --latency -o $CURRENT_TEST_DIR/perf.data.1 bash -c "for i in {1..100} ; do cat /proc/cpuinfo 1> /dev/null & done; sleep 1" 2> $LOGS_DIR/setup-latency.log
+PERF_EXIT_CODE=$?
+
+echo ==================
+cat $LOGS_DIR/setup-latency.log
+echo ==================
+
+../common/check_all_patterns_found.pl "$RE_LINE_RECORD1" "$RE_LINE_RECORD2" < $LOGS_DIR/setup-latency.log
+CHECK_EXIT_CODE=$?
+
+print_results $PERF_EXIT_CODE $CHECK_EXIT_CODE "prepare the perf.data.1 file"
+(( TEST_RESULT += $? ))
 
 print_overall_results $TEST_RESULT
 exit $?
diff --git a/tools/perf/tests/shell/base_report/test_basic.sh b/tools/perf/tests/shell/base_report/test_basic.sh
index 2398eba4d3fdd..adfd8713b8f87 100755
--- a/tools/perf/tests/shell/base_report/test_basic.sh
+++ b/tools/perf/tests/shell/base_report/test_basic.sh
@@ -183,6 +183,58 @@ print_results $PERF_EXIT_CODE $CHECK_EXIT_CODE "symbol filter"
 (( TEST_RESULT += $? ))
 
 
+### latency and parallelism
+
+# Record with --latency should record with context switches.
+$CMD_PERF report -i $CURRENT_TEST_DIR/perf.data.1 --stdio --header-only > $LOGS_DIR/latency_header.log
+PERF_EXIT_CODE=$?
+
+../common/check_all_patterns_found.pl ", context_switch = 1, " < $LOGS_DIR/latency_header.log
+CHECK_EXIT_CODE=$?
+
+print_results $PERF_EXIT_CODE $CHECK_EXIT_CODE "latency header"
+(( TEST_RESULT += $? ))
+
+
+# The default report for latency profile should show Overhead and Latency fields (in that order).
+$CMD_PERF report --stdio -i $CURRENT_TEST_DIR/perf.data.1 > $LOGS_DIR/latency_default.log 2> $LOGS_DIR/latency_default.err
+PERF_EXIT_CODE=$?
+
+../common/check_all_patterns_found.pl "# Overhead   Latency  Command" < $LOGS_DIR/latency_default.log
+CHECK_EXIT_CODE=$?
+../common/check_errors_whitelisted.pl "stderr-whitelist.txt" < $LOGS_DIR/latency_default.err
+(( CHECK_EXIT_CODE += $? ))
+
+print_results $PERF_EXIT_CODE $CHECK_EXIT_CODE "default report for latency profile"
+(( TEST_RESULT += $? ))
+
+
+# The latency report for latency profile should show Latency and Overhead fields (in that order).
+$CMD_PERF report --latency --stdio -i $CURRENT_TEST_DIR/perf.data.1 > $LOGS_DIR/latency_latency.log 2> $LOGS_DIR/latency_latency.err
+PERF_EXIT_CODE=$?
+
+../common/check_all_patterns_found.pl "#  Latency  Overhead  Command" < $LOGS_DIR/latency_latency.log
+CHECK_EXIT_CODE=$?
+../common/check_errors_whitelisted.pl "stderr-whitelist.txt" < $LOGS_DIR/latency_latency.err
+(( CHECK_EXIT_CODE += $? ))
+
+print_results $PERF_EXIT_CODE $CHECK_EXIT_CODE "latency report for latency profile"
+(( TEST_RESULT += $? ))
+
+
+# Ensure parallelism histogram with parallelism filter does not fail/crash.
+$CMD_PERF report --hierarchy --sort latency,parallelism,comm,symbol --parallelism=1,2 --stdio -i $CURRENT_TEST_DIR/perf.data.1 > $LOGS_DIR/parallelism_hierarchy.log 2> $LOGS_DIR/parallelism_hierarchy.err
+PERF_EXIT_CODE=$?
+
+../common/check_all_patterns_found.pl "#           Latency  Parallelism / Command / Symbol" < $LOGS_DIR/parallelism_hierarchy.log
+CHECK_EXIT_CODE=$?
+../common/check_errors_whitelisted.pl "stderr-whitelist.txt" < $LOGS_DIR/parallelism_hierarchy.err
+(( CHECK_EXIT_CODE += $? ))
+
+print_results $PERF_EXIT_CODE $CHECK_EXIT_CODE "parallelism histogram"
+(( TEST_RESULT += $? ))
+
+
 # TODO: $CMD_PERF report -n --showcpuutilization -TUxDg 2> 01.log
 
 # print overall results
-- 
2.48.1.502.g6dc24dfdaf-goog