perf: Add generic memory sampling interface

This patch adds PERF_SAMPLE_DATA_SRC.

PERF_SAMPLE_DATA_SRC collects the data source, i.e., where
did the data associated with the sampled instruction
come from. Information is stored in a perf_mem_data_src
structure. It contains opcode, mem level, tlb, snoop,
lock information, subject to availability in hardware.

Signed-off-by: Stephane Eranian <eranian@google.com>
Cc: peterz@infradead.org
Cc: ak@linux.intel.com
Cc: acme@redhat.com
Cc: jolsa@redhat.com
Cc: namhyung.kim@lge.com
Link: http://lkml.kernel.org/r/1359040242-8269-8-git-send-email-eranian@google.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

1 files changed, 6 insertions, 0 deletions

diff --git a/kernel/events/core.c b/kernel/events/core.c
index 9e3edb272b3e..77c96d18c23a 100644
--- a/kernel/events/core.c
+++ b/kernel/events/core.c
@@ -982,6 +982,9 @@ static void perf_event__header_size(struct perf_event *event)
         if (sample_type & PERF_SAMPLE_READ)
                 size += event->read_size;
 
+        if (sample_type & PERF_SAMPLE_DATA_SRC)
+                size += sizeof(data->data_src.val);
+
         event->header_size = size;
 }
 
@@ -4199,6 +4202,9 @@ void perf_output_sample(struct perf_output_handle *handle,
 
         if (sample_type & PERF_SAMPLE_WEIGHT)
                 perf_output_put(handle, data->weight);
+
+        if (sample_type & PERF_SAMPLE_DATA_SRC)
+                perf_output_put(handle, data->data_src.val);
 }
 
 void perf_prepare_sample(struct perf_event_header *header,