| 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) |
