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| author |   Tom Zanussi <tom.zanussi@linux.intel.com> | 2016-03-03 12:54:58 -0600 |
|---|---|---|
| committer |   Steven Rostedt <rostedt@goodmis.org> | 2016-04-19 18:56:00 -0400 |
| commit | db1388b4ffa9e31e9ff0abacc3bdb121bec8c688 (patch) | |
| tree | e901832df388a3bbd77a9febc7f467c3fadb96de /kernel/trace/trace.h | |
| parent | tracing: Add support for multiple hist triggers per event (diff) | |
| download | linux-dev-db1388b4ffa9e31e9ff0abacc3bdb121bec8c688.tar.xz linux-dev-db1388b4ffa9e31e9ff0abacc3bdb121bec8c688.zip | |
tracing: Add support for named triggers
Named triggers are sets of triggers that share a common set of trigger
data. An example of functionality that could benefit from this type
of capability would be a set of inlined probes that would each
contribute event counts, for example, to a shared counter data
structure.
The first named trigger registered with a given name owns the common
trigger data that the others subsequently registered with the same
name will reference. The functions defined here allow users to add,
delete, and find named triggers.
It also adds functions to pause and unpause named triggers; since
named triggers act upon common data, they should also be paused and
unpaused as a group.
Link: http://lkml.kernel.org/r/c09ff648360f65b10a3e321eddafe18060b4a04f.1457029949.git.tom.zanussi@linux.intel.com
Signed-off-by: Tom Zanussi <tom.zanussi@linux.intel.com>
Tested-by: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>
Reviewed-by: Namhyung Kim <namhyung@kernel.org>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
Diffstat (limited to 'kernel/trace/trace.h')
| -rw-r--r-- | kernel/trace/trace.h | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/kernel/trace/trace.h b/kernel/trace/trace.h index cab1f4bfe85b..727a3d28bce5 100644 --- a/kernel/trace/trace.h +++ b/kernel/trace/trace.h @@ -1184,7 +1184,11 @@ struct event_trigger_data { char *filter_str; void *private_data; bool paused; + bool paused_tmp; struct list_head list; + char *name; + struct list_head named_list; + struct event_trigger_data *named_data; }; /* Avoid typos */ @@ -1227,6 +1231,15 @@ extern void unregister_trigger(char *glob, struct event_trigger_ops *ops, extern int set_trigger_filter(char *filter_str, struct event_trigger_data *trigger_data, struct trace_event_file *file); +extern struct event_trigger_data *find_named_trigger(const char *name); +extern bool is_named_trigger(struct event_trigger_data *test); +extern int save_named_trigger(const char *name, + struct event_trigger_data *data); +extern void del_named_trigger(struct event_trigger_data *data); +extern void pause_named_trigger(struct event_trigger_data *data); +extern void unpause_named_trigger(struct event_trigger_data *data); +extern void set_named_trigger_data(struct event_trigger_data *data, + struct event_trigger_data *named_data); extern int register_event_command(struct event_command *cmd); extern int unregister_event_command(struct event_command *cmd); extern int register_trigger_hist_enable_disable_cmds(void); |