]> git.karo-electronics.de Git - linux-beck.git/commit
perf evsel: Add overwrite attribute and check write_backward
authorWang Nan <wangnan0@huawei.com>
Fri, 20 May 2016 16:38:23 +0000 (16:38 +0000)
committerArnaldo Carvalho de Melo <acme@redhat.com>
Fri, 20 May 2016 17:54:23 +0000 (14:54 -0300)
commitb90dc17a5d14a881f9bb3b58edb3d71075d58afb
treee621aa3d42c009475f758375b76d4ef755520bd6
parent408cf677073a5d1a7343bc6430a7297ba7b280d4
perf evsel: Add overwrite attribute and check write_backward

Add 'overwrite' attribute to evsel to mark whether this event is
overwritable. The following commits will support syntax like:

  # perf record -e cycles/overwrite/ ...

An overwritable evsel requires kernel support for the
perf_event_attr.write_backward ring buffer feature.

Add it to perf_missing_feature.

Signed-off-by: Wang Nan <wangnan0@huawei.com>
Cc: He Kuang <hekuang@huawei.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Masami Hiramatsu <mhiramat@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Zefan Li <lizefan@huawei.com>
Cc: pi3orama@163.com
Link: http://lkml.kernel.org/r/1463762315-155689-2-git-send-email-wangnan0@huawei.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
tools/perf/util/evsel.c
tools/perf/util/evsel.h