tjh.dev / kernel
Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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perf test script: Add python script testing support

Basic coverage of python script support from `perf script`.

Committer testing:

$ perf test 'perf script python'
107: perf script python tests : Ok
$ perf test -vv 'perf script python'
107: perf script python tests:
--- start ---
test child forked, pid 595537
Testing event: sched:sched_switch
perf script python test [Skipped: failed to record sched:sched_switch]
Testing event: task-clock
Generating python script...
generated Python script: /tmp/__perf_test_script.J4rWj.py
Executing python script...
perf script python test [Success: task-clock triggered param_dict]
---- end(0) ----
107: perf script python tests : Ok
$

Signed-off-by: Ian Rogers <irogers@google.com>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: James Clark <james.clark@linaro.org>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Leo Yan <leo.yan@arm.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Sandipan Das <sandipan.das@amd.com>
Cc: Yujie Liu <yujie.liu@intel.com>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

authored by

Ian Rogers and committed by
Arnaldo Carvalho de Melo dbf01083 22736977

+113
+113
tools/perf/tests/shell/script_python.sh
··· 1 + #!/bin/bash 2 + # perf script python tests 3 + # SPDX-License-Identifier: GPL-2.0 4 + 5 + set -e 6 + 7 + # set PERF_EXEC_PATH to find scripts in the source directory 8 + perfdir=$(dirname "$0")/../.. 9 + if [ -e "$perfdir/scripts/python/Perf-Trace-Util" ]; then 10 + export PERF_EXEC_PATH=$perfdir 11 + fi 12 + 13 + 14 + perfdata=$(mktemp /tmp/__perf_test_script_python.perf.data.XXXXX) 15 + generated_script=$(mktemp /tmp/__perf_test_script.XXXXX.py) 16 + 17 + cleanup() { 18 + rm -f "${perfdata}" 19 + rm -f "${generated_script}" 20 + trap - EXIT TERM INT 21 + } 22 + 23 + trap_cleanup() { 24 + echo "Unexpected signal in ${FUNCNAME[1]}" 25 + cleanup 26 + exit 1 27 + } 28 + trap trap_cleanup TERM INT 29 + trap cleanup EXIT 30 + 31 + check_python_support() { 32 + if perf check feature -q libpython; then 33 + return 0 34 + fi 35 + echo "perf script python test [Skipped: no libpython support]" 36 + return 2 37 + } 38 + 39 + test_script() { 40 + local event_name=$1 41 + local expected_output=$2 42 + local record_opts=$3 43 + 44 + echo "Testing event: $event_name" 45 + 46 + # Try to record. If this fails, it might be permissions or lack of 47 + # support. Return 2 to indicate "skip this event" rather than "fail 48 + # test". 49 + if ! perf record -o "${perfdata}" -e "$event_name" $record_opts -- perf test -w thloop > /dev/null 2>&1; then 50 + echo "perf script python test [Skipped: failed to record $event_name]" 51 + return 2 52 + fi 53 + 54 + echo "Generating python script..." 55 + if ! perf script -i "${perfdata}" -g "${generated_script}"; then 56 + echo "perf script python test [Failed: script generation for $event_name]" 57 + return 1 58 + fi 59 + 60 + if [ ! -f "${generated_script}" ]; then 61 + echo "perf script python test [Failed: script not generated for $event_name]" 62 + return 1 63 + fi 64 + 65 + # Perf script -g python doesn't generate process_event for generic 66 + # events so append it manually to test that the callback works. 67 + if ! grep -q "def process_event" "${generated_script}"; then 68 + cat <<EOF >> "${generated_script}" 69 + 70 + def process_event(param_dict): 71 + print("param_dict: %s" % param_dict) 72 + EOF 73 + fi 74 + 75 + echo "Executing python script..." 76 + output=$(perf script -i "${perfdata}" -s "${generated_script}" 2>&1) 77 + 78 + if echo "$output" | grep -q "$expected_output"; then 79 + echo "perf script python test [Success: $event_name triggered $expected_output]" 80 + return 0 81 + else 82 + echo "perf script python test [Failed: $event_name did not trigger $expected_output]" 83 + echo "Output was:" 84 + echo "$output" | head -n 20 85 + return 1 86 + fi 87 + } 88 + 89 + check_python_support || exit 2 90 + 91 + # Try tracepoint first 92 + test_script "sched:sched_switch" "sched__sched_switch" "-c 1" && res=0 || res=$? 93 + 94 + if [ $res -eq 0 ]; then 95 + exit 0 96 + elif [ $res -eq 1 ]; then 97 + exit 1 98 + fi 99 + 100 + # If tracepoint skipped (res=2), try task-clock 101 + # For generic events like task-clock, the generated script uses process_event() 102 + # which prints the param_dict. 103 + test_script "task-clock" "param_dict" "-c 100" && res=0 || res=$? 104 + 105 + if [ $res -eq 0 ]; then 106 + exit 0 107 + elif [ $res -eq 1 ]; then 108 + exit 1 109 + fi 110 + 111 + # If both skipped 112 + echo "perf script python test [Skipped: Could not record tracepoint or task-clock]" 113 + exit 2