[PATCH 0/5] 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 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 <wangnan0@huawei.com>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Zefan Li <lizefan@huawei.com>
Cc: pi3orama@163.com

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