perf data symbol test depends on finding symbol buf1 in perf, and fails if
perf has been stripped and no debug object is available. In that case, skip
the test instead.
Example:
Before:
$ strip tools/perf/perf
$ tools/perf/perf buildid-cache -p `realpath tools/perf/perf`
$ tools/perf/perf test -v 'data symbol'
113: Test data symbol :
--- start ---
test child forked, pid 125646
Recording workload...
[ perf record: Woken up 3 times to write data ]
[ perf record: Captured and wrote 0.577 MB /tmp/__perf_test.perf.data.Jhbdp (7794 samples) ]
Cleaning up files...
test child finished with -1
---- end ----
Test data symbol: FAILED!
After:
$ tools/perf/perf test -v 'data symbol'
113: Test data symbol :
--- start ---
test child forked, pid 125747
perf does not have symbol 'buf1'
perf is missing symbols - skipping test
test child finished with -2
---- end ----
Test data symbol: Skip
Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Acked-by: Ian Rogers <irogers@google.com>
Cc: German Gomez <german.gomez@arm.com>
Cc: James Clark <james.clark@arm.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Leo Yan <leo.yan@linaro.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Link: https://lore.kernel.org/r/20231123075848.9652-9-adrian.hunter@intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
The test is designed with a data structure with 64-byte alignment, it
has two fields "data1" and "data2", and other fields are reserved.
Using the "perf mem" command, we can record and report memory samples
for a self-contained workload with 1 second duration. If no samples are
obtained for the data structure "buf1", it reports failure; and by
checking the offset in structure "buf1", if the memory samples aren't
for the "data1" and "data2" fields, it means wrong data symbol parsing
and returns failure.
Committer testing:
[root@quaco ~]# grep -m1 "model name" /proc/cpuinfo
model name : Intel(R) Core(TM) i7-8650U CPU @ 1.90GHz
[root@quaco ~]#
[root@quaco ~]# perf test -v "data symbol"
104: Test data symbol :
--- start ---
test child forked, pid 192318
Compiling test program...
Recording workload...
[ perf record: Woken up 2 times to write data ]
[ perf record: Captured and wrote 0.389 MB /tmp/__perf_test.perf.data.LIuQl (5570 samples) ]
Cleaning up files...
test child finished with 0
---- end ----
Test data symbol: Ok
[root@quaco ~]#
Signed-off-by: Leo Yan <leo.yan@linaro.org>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Ravi Bangoria <ravi.bangoria@amd.com>
Link: https://lore.kernel.org/r/20221006101039.47870-1-leo.yan@linaro.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
