diff options
| author | Steven Rostedt (Red Hat) <rostedt@goodmis.org> | 2014-06-02 23:20:16 -0400 |
|---|---|---|
| committer | Jiri Olsa <jolsa@kernel.org> | 2014-06-07 23:33:37 +0200 |
| commit | 473a778a2f2949972b52ad7fc61577f381f2d05e (patch) | |
| tree | 17cbf62b89bcbc38b600027cc61eda50469a796b /mm/truncate.c | |
| parent | 49440828ad7b809e9d31f6108875e3b1e974690c (diff) | |
tools lib traceevent: Added support for __get_bitmask() macro
Coming in v3.16, trace events will be able to save bitmasks in raw
format in the ring buffer and output it with the __get_bitmask() macro.
In order for userspace tools to parse this, it must be able to handle
the __get_bitmask() call and be able to convert the data that's in
the ring buffer into a nice bitmask format. The output is similar to
what the kernel uses to print bitmasks, with a comma separator every
4 bytes (8 characters).
This allows for cpumasks to also be saved efficiently.
The first user is the thermal:thermal_power_limit event which has the
following output:
thermal_power_limit: cpus=0000000f freq=1900000 cdev_state=0 power=5252
Link: http://lkml.kernel.org/r/20140506132238.22e136d1@gandalf.local.home
Suggested-by: Javi Merino <javi.merino@arm.com>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
Acked-by: Namhyung Kim <namhyung@kernel.org>
Tested-by: Javi Merino <javi.merino@arm.com>
Link: http://lkml.kernel.org/r/20140603032224.229186537@goodmis.org
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Diffstat (limited to 'mm/truncate.c')
0 files changed, 0 insertions, 0 deletions