Commit 9ecda41acb97 ("perf/core: Add ::write_backward attribute to
perf event") introduces backward ring buffer. This 4 patches add basic
support for reading from it, and add a new test case for it.
v1 -> v2:
Patch 1/5 in v1 has been collected by perf/core, so remove it;
Change function names in patch 2/5 in v1 (1/4 in v2):
__perf_evlist__mmap_read -> perf_mmap__read
Wang Nan (4):
perf tools: Extract perf_mmap__read()
perf tools: Rename variable in perf_mmap__read()
perf tools: Support reading from backward ring buffer
perf tests: Add test to check backward ring buffer
tools/perf/tests/Build | 1 +
tools/perf/tests/backward-ring-buffer.c | 151 ++++++++++++++++++++++++++++++++
tools/perf/tests/builtin-test.c | 4 +
tools/perf/tests/tests.h | 1 +
tools/perf/util/evlist.c | 95 +++++++++++++++-----
tools/perf/util/evlist.h | 4 +
6 files changed, 233 insertions(+), 23 deletions(-)
create mode 100644 tools/perf/tests/backward-ring-buffer.c
Signed-off-by: Wang Nan <[email protected]>
Cc: Arnaldo Carvalho de Melo <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Cc: Zefan Li <[email protected]>
Cc: [email protected]
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1.8.3.4
