perf_counter: optionally provide the pid/tid of the sampled task
Allow cpu wide counters to profile userspace by providing what process
the sample belongs to.
This raises the first issue with the output type, lots of these
options: group, tid, callchain, etc.. are non-exclusive and could be
combined, suggesting a bitfield.
However, things like the mmap() data stream doesn't fit in that.
How to split the type field...
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Arjan van de Ven <arjan@infradead.org>
Cc: Wu Fengguang <fengguang.wu@intel.com>
Orig-LKML-Reference: <20090325113317.013775235@chello.nl>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
diff --git a/include/linux/perf_counter.h b/include/linux/perf_counter.h
index c256635..7fdbdf8 100644
--- a/include/linux/perf_counter.h
+++ b/include/linux/perf_counter.h
@@ -127,8 +127,9 @@
exclude_kernel : 1, /* ditto kernel */
exclude_hv : 1, /* ditto hypervisor */
exclude_idle : 1, /* don't count when idle */
+ include_tid : 1, /* include the tid */
- __reserved_1 : 55;
+ __reserved_1 : 54;
__u32 extra_config_len;
__u32 __reserved_4;
@@ -164,6 +165,8 @@
enum perf_event_type {
PERF_EVENT_IP = 0,
PERF_EVENT_GROUP = 1,
+
+ __PERF_EVENT_TID = 0x100,
};
#ifdef __KERNEL__