github-mirror/linux
1
0
Fork 0
mirror of https://github.com/torvalds/linux.git synced 2026-05-28 00:53:34 +02:00
Code Issues Actions Packages Projects Releases Wiki Activity Graph

perf test: Test perf lock contention CSV output

Browse Source 
To verify CSV output, just check the number of separators (",") using
the tr and wc commands like this.

  grep -v "^#" ${result} | tr -d -c | wc -c

Now it expects 6 columns (and 5 separators) in the output, but it may
be changed later so count the field in the header first and compare it
to the actual output lines.

  $ cat ${result}
  # output: contended, total wait, max wait, avg wait, type, caller
  1, 28787, 28787, 28787, spinlock, raw_spin_rq_lock_nested+0x1b

The test looks like below now:

  $ sudo ./perf test -v contention
   86: kernel lock contention analysis test                            :
  --- start ---
  test child forked, pid 2705822
  Testing perf lock record and perf lock contention
  Testing perf lock contention --use-bpf
  Testing perf lock record and perf lock contention at the same time
  Testing perf lock contention --threads
  Testing perf lock contention --lock-addr
  Testing perf lock contention --type-filter (w/ spinlock)
  Testing perf lock contention --lock-filter (w/ tasklist_lock)
  Testing perf lock contention --callstack-filter (w/ unix_stream)
  Testing perf lock contention --callstack-filter with task aggregation
  Testing perf lock contention CSV output
  test child finished with 0
  ---- end ----
  kernel lock contention analysis test: Ok

Acked-by: Ian Rogers <irogers@google.com>
Cc: Hao Luo <haoluo@google.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Arnaldo Carvalho de Melo <acme@kernel.org>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Song Liu <song@kernel.org>
Link: https://lore.kernel.org/r/20230628200141.2739587-5-namhyung@kernel.org
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
This commit is contained in:
Namhyung Kim 2023-06-28 13:01:41 -07:00
parent f6027053f8
commit 2aefb4cc90
1 changed files with 36 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

36
tools/perf/tests/shell/lock_contention.sh
View File

@ -233,6 +233,41 @@ test_aggr_task_stack_filter()
fi
}
test_csv_output()
{
echo "Testing perf lock contention CSV output"
perf lock contention -i ${perfdata} -E 1 -x , --output ${result}
# count the number of commas in the header
# it should have 5: contended, total-wait, max-wait, avg-wait, type, caller
header=$(grep "# output:" ${result} | tr -d -c , | wc -c)
if [ "${header}" != "5" ]; then
echo "[Fail] Recorded result does not have enough output columns: ${header} != 5"
err=1
exit
fi
# count the number of commas in the output
output=$(grep -v "^#" ${result} | tr -d -c , | wc -c)
if [ "${header}" != "${output}" ]; then
echo "[Fail] Recorded result does not match the number of commas: ${header} != ${output}"
err=1
exit
fi
if ! perf lock con -b true > /dev/null 2>&1 ; then
echo "[Skip] No BPF support"
return
fi
# the perf lock contention output goes to the stderr
perf lock con -a -b -E 1 -x , --output ${result} -- perf bench sched messaging > /dev/null 2>&1
output=$(grep -v "^#" ${result} | tr -d -c , | wc -c)
if [ "${header}" != "${output}" ]; then
echo "[Fail] BPF result does not match the number of commas: ${header} != ${output}"
err=1
exit
fi
}
check
test_record
@ -244,5 +279,6 @@ test_type_filter
test_lock_filter
test_stack_filter
test_aggr_task_stack_filter
test_csv_output
exit ${err}