Commit 9ecda41acb97 ("perf/core: Add ::write_backward attribute to
perf event") introduces backward ring buffer. This 5 patches add basic
support for reading from it, and add a new test case for it.Wang Nan (5): perf tools: Enforce ring buffer reading perf tools: Extract __perf_evlist__mmap_read() perf tools: Rename variable in __perf_evlist__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 | 104 +++++++++++++++++----- tools/perf/util/evlist.h | 4 + 6 files changed, 242 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] -- 1.8.3.4
