tmakin/ack-tegra
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

perf_counter: track task-comm data

Browse Source 
Similar to the mmap data stream, add one that tracks the task COMM field,
so that the userspace reporting knows what to call a task.

Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Corey Ashford <cjashfor@linux.vnet.ibm.com>
LKML-Reference: <20090408130409.127422406@chello.nl>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Peter Zijlstra
2009-04-08 15:01:30 +02:00
committed by Ingo Molnar
parent 8740f9418c
commit 8d1b2d9361
3 changed files with 109 additions and 1 deletions
Download Patch File Download Diff File Expand all files Collapse all files
include/linux/perf_counter.h
+15 -1
View File
@@ -142,8 +142,9 @@ struct perf_counter_hw_event {
exclude_idle : 1, /* don't count when idle */
mmap : 1, /* include mmap data */
munmap : 1, /* include munmap data */
comm : 1, /* include comm data */
__reserved_1 : 53;
__reserved_1 : 52;
__u32 extra_config_len;
__u32 wakeup_events; /* wakeup every n events */
@@ -230,6 +231,16 @@ enum perf_event_type {
PERF_EVENT_MMAP = 1,
PERF_EVENT_MUNMAP = 2,
/*
* struct {
* struct perf_event_header header;
*
* u32 pid, tid;
* char comm[];
* };
*/
PERF_EVENT_COMM = 3,
/*
* When header.misc & PERF_EVENT_MISC_OVERFLOW the event_type field
* will be PERF_RECORD_*
@@ -545,6 +556,8 @@ extern void perf_counter_mmap(unsigned long addr, unsigned long len,
extern void perf_counter_munmap(unsigned long addr, unsigned long len,
unsigned long pgoff, struct file *file);
extern void perf_counter_comm(struct task_struct *tsk);
#define MAX_STACK_DEPTH 255
struct perf_callchain_entry {
@@ -583,6 +596,7 @@ static inline void
perf_counter_munmap(unsigned long addr, unsigned long len,
unsigned long pgoff, struct file *file) { }
static inline void perf_counter_comm(struct task_struct *tsk) { }
#endif
#endif /* __KERNEL__ */