From: Andi Kleen <a...@linux.intel.com>
Expose INTX (count in transaction only, :t) and INTX_CHECKPOINTED
(on transaction abort restore counter, :c) attributes as generic perf event
attributes. These are important for measuring basic hardware transactional
behaviour.
They also need to be handled in a special way in the Haswell port, so it's
useful
to have them as generic attributes.
Typically they would be used as a group with:
{cycles,cycles:t,cycles:ct}
Then:
Total cycles = cycles
Percent cycles in transaction = (cycles:t/cycles)*100
Percent cycles in transaction lost due to aborts = ((cycles:t-cycles:ct) /
cycles)*100
This gives a quick overview of the transactional execution.
Used in followon patches.
Signed-off-by: Andi Kleen <a...@linux.intel.com>
---
include/linux/perf_event.h | 7 +++++--
1 files changed, 5 insertions(+), 2 deletions(-)
diff --git a/include/linux/perf_event.h b/include/linux/perf_event.h
index 33ed9d6..4c2adfa 100644
--- a/include/linux/perf_event.h
+++ b/include/linux/perf_event.h
@@ -251,11 +251,14 @@ struct perf_event_attr {
precise_ip : 2, /* skid constraint */
mmap_data : 1, /* non-exec mmap data */
sample_id_all : 1, /* sample_type all events
*/
-
exclude_host : 1, /* don't count in host */
exclude_guest : 1, /* don't count in guest */
+ intx : 1, /* count inside
transaction */
+ intx_checkpointed : 1, /* checkpointed in
transaction */
+
+
- __reserved_1 : 43;
+ __reserved_1 : 41;
union {
__u32 wakeup_events; /* wakeup every n events */
--
1.7.7.6
--
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