bybrooklyn/linux
1
0
Fork 0
mirror of https://github.com/torvalds/linux.git synced 2026-04-27 11:02:31 -04:00
Code Issues Packages Projects Releases Wiki Activity

perf test: Add --metric-only to perf stat output tests

Browse Source 
Add a test case for --metric-only for std, csv, json output mode using
shadow IPC metric from instructions and cycles events.  It should
produce 'insn per cycle' metric.

But currently JSON output has (none) 'GHz' as well.  It looks like a bug
but I don't have enough time to debug it for now so I made it pass. :(

  $ perf stat --metric-only -e instructions,cycles true

   Performance counter stats for 'true':

                    0.56

         0.002127319 seconds time elapsed

         0.002077000 seconds user
         0.000000000 seconds sys

  $ perf stat -x, --metric-only -e instructions,cycles true

  0.55,,

  $ perf stat -j --metric-only -e instructions,cycles true
  {"insn per cycle" : "0.53", "GHz" : "none"}

  $ perf test output -v
    5: Test data source output                                         : Ok
   31: Sort output of hist entries                                     : Ok
   88: perf stat CSV output linter                                     : Ok
   90: perf stat JSON output linter                                    : Ok
   92: perf stat STD output linter                                     : Ok

Tested-by: Thomas Falcon <thomas.falcon@intel.com>
Link: https://lore.kernel.org/r/20250304022837.1877845-2-namhyung@kernel.org
Suggested-by: Ian Rogers <irogers@google.com>
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
This commit is contained in:
Namhyung Kim
2025-03-03 18:28:32 -08:00
parent 2cc2f258a9
commit 45a86d017a
5 changed files with 34 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

9
tools/perf/tests/shell/stat+json_output.sh
View File

@@ -173,6 +173,14 @@ check_per_socket()
echo "[Success]"
}
check_metric_only()
{
echo -n "Checking json output: metric only "
perf stat -j --metric-only -e instructions,cycles -o "${stat_output}" true
$PYTHON $pythonchecker --metric-only --file "${stat_output}"
echo "[Success]"
}
# The perf stat options for per-socket, per-core, per-die
# and -A ( no_aggr mode ) uses the info fetched from this
# directory: "/sys/devices/system/cpu/cpu*/topology". For
@@ -207,6 +215,7 @@ check_interval
check_event
check_per_thread
check_per_node
check_metric_only
if [ $skip_test -ne 1 ]
then
check_system_wide_no_aggr