| The struct perf_event_attr test (attr tests) support | |
| ==================================================== | |
| This testing support is embedded into perf directly and is governed | |
| by the PERF_TEST_ATTR environment variable and hook inside the | |
| sys_perf_event_open function. | |
| The general idea is to store 'struct perf_event_attr' details for | |
| each event created within single perf command. Each event details | |
| are stored into separate text file. Once perf command is finished | |
| these files are checked for values we expect for command. | |
| The attr tests consist of following parts: | |
| tests/attr.c | |
| ------------ | |
| This is the sys_perf_event_open hook implementation. The hook | |
| is triggered when the PERF_TEST_ATTR environment variable is | |
| defined. It must contain name of existing directory with access | |
| and write permissions. | |
| For each sys_perf_event_open call event details are stored in | |
| separate file. Besides 'struct perf_event_attr' values we also | |
| store 'fd' and 'group_fd' values to allow checking for groups. | |
| tests/attr.py | |
| ------------- | |
| This is the python script that does all the hard work. It reads | |
| the test definition, executes it and checks results. | |
| tests/attr/ | |
| ----------- | |
| Directory containing all attr test definitions. | |
| Following tests are defined (with perf commands): | |
| perf record kill (test-record-basic) | |
| perf record -b kill (test-record-branch-any) | |
| perf record -j any kill (test-record-branch-filter-any) | |
| perf record -j any_call kill (test-record-branch-filter-any_call) | |
| perf record -j any_ret kill (test-record-branch-filter-any_ret) | |
| perf record -j hv kill (test-record-branch-filter-hv) | |
| perf record -j ind_call kill (test-record-branch-filter-ind_call) | |
| perf record -j k kill (test-record-branch-filter-k) | |
| perf record -j u kill (test-record-branch-filter-u) | |
| perf record -c 123 kill (test-record-count) | |
| perf record -d kill (test-record-data) | |
| perf record -F 100 kill (test-record-freq) | |
| perf record -g kill (test-record-graph-default) | |
| perf record --call-graph dwarf kill (test-record-graph-dwarf) | |
| perf record --call-graph fp kill (test-record-graph-fp) | |
| perf record --group -e cycles,instructions kill (test-record-group) | |
| perf record -e '{cycles,instructions}' kill (test-record-group1) | |
| perf record -D kill (test-record-no-delay) | |
| perf record -i kill (test-record-no-inherit) | |
| perf record -n kill (test-record-no-samples) | |
| perf record -c 100 -P kill (test-record-period) | |
| perf record -R kill (test-record-raw) | |
| perf stat -e cycles kill (test-stat-basic) | |
| perf stat kill (test-stat-default) | |
| perf stat -d kill (test-stat-detailed-1) | |
| perf stat -dd kill (test-stat-detailed-2) | |
| perf stat -ddd kill (test-stat-detailed-3) | |
| perf stat --group -e cycles,instructions kill (test-stat-group) | |
| perf stat -e '{cycles,instructions}' kill (test-stat-group1) | |
| perf stat -i -e cycles kill (test-stat-no-inherit) |