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| author | Steven Rostedt (Red Hat) <rostedt@goodmis.org> | 2014-06-03 07:20:16 +0400 |
|---|---|---|
| committer | Jiri Olsa <jolsa@kernel.org> | 2014-06-08 01:33:37 +0400 |
| commit | 473a778a2f2949972b52ad7fc61577f381f2d05e (patch) | |
| tree | 17cbf62b89bcbc38b600027cc61eda50469a796b /tools/lib/traceevent/event-parse.h | |
| parent | 49440828ad7b809e9d31f6108875e3b1e974690c (diff) | |
| download | linux-473a778a2f2949972b52ad7fc61577f381f2d05e.tar.xz | |
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 'tools/lib/traceevent/event-parse.h')
| -rw-r--r-- | tools/lib/traceevent/event-parse.h | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/tools/lib/traceevent/event-parse.h b/tools/lib/traceevent/event-parse.h index 56e0e6c12411..7a3873ff9a4f 100644 --- a/tools/lib/traceevent/event-parse.h +++ b/tools/lib/traceevent/event-parse.h @@ -208,6 +208,11 @@ struct print_arg_string { int offset; }; +struct print_arg_bitmask { + char *bitmask; + int offset; +}; + struct print_arg_field { char *name; struct format_field *field; @@ -274,6 +279,7 @@ enum print_arg_type { PRINT_DYNAMIC_ARRAY, PRINT_OP, PRINT_FUNC, + PRINT_BITMASK, }; struct print_arg { @@ -288,6 +294,7 @@ struct print_arg { struct print_arg_hex hex; struct print_arg_func func; struct print_arg_string string; + struct print_arg_bitmask bitmask; struct print_arg_op op; struct print_arg_dynarray dynarray; }; |