Messages in this thread | | | Date | Wed, 25 May 2022 08:18:27 -0300 | From | Arnaldo Carvalho de Melo <> | Subject | Re: [PATCH v4 0/3] JSON output for perf stat |
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Em Tue, May 24, 2022 at 10:38:11PM -0700, Ian Rogers escreveu: > Parsing the CSV or text output of perf stat can be problematic when > new output is added (columns in CSV format). JSON names values and > simplifies the job of parsing. Add a JSON output option to perf-stat > then add unit test that parses and validates the output. > > This is a resend of two v2 patches: > https://lore.kernel.org/lkml/20210813220754.2104922-1-cjense@google.com/ > https://lore.kernel.org/lkml/20210813220936.2105426-1-cjense@google.com/ > with a few formatting changes and improvements to the linter. > > The CSV test/linter is also added to ensure that CSV output doesn't regress: > https://lore.kernel.org/lkml/20210813192108.2087512-1-cjense@google.com/
So, the JSON test is failing:
⬢[acme@toolbox perf]$ perf test -v JSON Couldn't bump rlimit(MEMLOCK), failures may take place when creating BPF maps, etc 90: perf stat JSON output linter : --- start --- test child forked, pid 2626229 Checking json output: no args [Success] Checking json output: system wide [Skip] parnoia and not root Checking json output: system wide [Skip] parnoia and not root Checking json output: interval Test failed for input: {"interval" : 0.000506453, "counter-value" : "0.212360", "unit" : "msec", "event" : "task-clock:u", "event-runtime" : 212360, "pcnt-running" : 100.00, "metric-value" : 0.000212, "metric-unit" : "CPUs utilized"}
{"interval" : 0.000506453, "counter-value" : "0.000000", "unit" : "", "event" : "context-switches:u", "event-runtime" : 212360, "pcnt-running" : 100.00, "metric-value" : 0.000000, "metric-unit" : "/sec"}
{"interval" : 0.000506453, "counter-value" : "0.000000", "unit" : "", "event" : "cpu-migrations:u", "event-runtime" : 212360, "pcnt-running" : 100.00, "metric-value" : 0.000000, "metric-unit" : "/sec"}
{"interval" : 0.000506453, "counter-value" : "45.000000", "unit" : "", "event" : "page-faults:u", "event-runtime" : 212360, "pcnt-running" : 100.00, "metric-value" : 211.904313, "metric-unit" : "K/sec"}
{"interval" : 0.000506453, "counter-value" : "143761.000000", "unit" : "", "event" : "cycles:u", "event-runtime" : 217290, "pcnt-running" : 100.00, "metric-value" : 0.676968, "metric-unit" : "GHz"}
{"interval" : 0.000506453, "counter-value" : "456.000000", "unit" : "", "event" : "stalled-cycles-frontend:u", "event-runtime" : 217290, "pcnt-running" : 100.00, "metric-value" : 0.317193, "metric-unit" : "frontend cycles idle"}
{"interval" : 0.000506453, "counter-value" : "11639.000000", "unit" : "", "event" : "stalled-cycles-backend:u", "event-runtime" : 217290, "pcnt-running" : 100.00, "metric-value" : 8.096076, "metric-unit" : "backend cycles idle"}
{"interval" : 0.000506453, "counter-value" : "150684.000000", "unit" : "", "event" : "instructions:u", "event-runtime" : 217290, "pcnt-running" : 100.00, "metric-value" : 1.048156, "metric-unit" : "insn per cycle"}
{"interval" : 0.000506453, "metric-value" : 0.077241, "metric-unit" : "stalled cycles per insn"}
{"interval" : 0.000506453, "counter-value" : "29735.000000", "unit" : "", "event" : "branches:u", "event-runtime" : 217290, "pcnt-running" : 100.00, "metric-value" : 140.021661, "metric-unit" : "M/sec"}
{"interval" : 0.000506453, "counter-value" : "<not counted>", "unit" : "", "event" : "branch-misses:u", "event-runtime" : 0, "pcnt-running" : 0.00, "metric-value" : 0.000000, "metric-unit" : ""}
Traceback (most recent call last): File "/var/home/acme/git/perf/./tools/perf/tests/shell/lib/perf_json_output_lint.py", line 91, in <module> check_json_output(expected_items) File "/var/home/acme/git/perf/./tools/perf/tests/shell/lib/perf_json_output_lint.py", line 52, in check_json_output raise RuntimeError(f'wrong number of fields. counted {count} expected {expected_items}' RuntimeError: wrong number of fields. counted 2 expected 7 in '{"interval" : 0.000506453, "metric-value" : 0.077241, "metric-unit" : "stalled cycles per insn"} ' test child finished with -1 ---- end ---- perf stat JSON output linter: FAILED! ⬢[acme@toolbox perf]$
So please check this and resubmit.
My system is a fedora 35 silverblue toolbox.
⬢[acme@toolbox perf]$ rpm -q python3 python3-3.10.4-1.fc35.x86_64
- Arnaldo
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