[PATCH v3 0/2] perf tools: Backward ring buffer support

[Wang Nan <wangnan0@huawei.com>]

Commit 9ecda41acb97 ("perf/core: Add ::write_backward attribute to
perf event") introduces backward ring buffer. This 2 patches add basic
support for reading from it, and add a new test case for it.

v2 -> v3:
  Improve commit message, add more comments (patch 1/2). patch 1-2/4 in
  v2 have been collected so remove them.

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 (2):
  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                |  50 +++++++++++
 tools/perf/util/evlist.h                |   4 +
 6 files changed, 211 insertions(+)
 create mode 100644 tools/perf/tests/backward-ring-buffer.c

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1.8.3.4