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- 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 -g kill (test-record-graph-default-aarch64)
- perf record --call-graph dwarf kill (test-record-graph-dwarf)
- perf record --call-graph fp kill (test-record-graph-fp)
- perf record --call-graph fp kill (test-record-graph-fp-aarch64)
- perf record -e '{cycles,instructions}' kill (test-record-group1)
- perf record -e '{cycles/period=1/,instructions/period=2/}:S' kill (test-record-group2)
- 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 -c 1 --pfm-events=cycles:period=2 (test-record-pfm-period)
- perf record -R kill (test-record-raw)
- perf record -c 2 -e arm_spe_0// -- kill (test-record-spe-period)
- perf record -e arm_spe_0/period=3/ -- kill (test-record-spe-period-term)
- perf record -e arm_spe_0/pa_enable=1/ -- kill (test-record-spe-physical-address)
- 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 -e '{cycles,instructions}' kill (test-stat-group1)
- perf stat -i -e cycles kill (test-stat-no-inherit)
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