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Subject[PATCH V6 14/17] perf tools: Intel PT to always update thread stack trace number
Date
The enhanced thread stack is used by higher layers but still requires
the trace number. The trace number is used to distinguish discontinuous
sections of trace (for example from Snapshot mode or Sample mode), which
cause the thread stack to be flushed.

Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
---
tools/perf/util/intel-pt.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/tools/perf/util/intel-pt.c b/tools/perf/util/intel-pt.c
index 9c25bfa..5a59fd8 100644
--- a/tools/perf/util/intel-pt.c
+++ b/tools/perf/util/intel-pt.c
@@ -265,7 +265,7 @@ static int intel_pt_get_trace(struct intel_pt_buffer *b, void *data)
if (!old_buffer || ptq->pt->sampling_mode || (ptq->pt->snapshot_mode &&
!buffer->consecutive)) {
b->consecutive = false;
- b->trace_nr = buffer->buffer_nr;
+ b->trace_nr = buffer->buffer_nr + 1;
} else {
b->consecutive = true;
}
@@ -1075,6 +1075,8 @@ static int intel_pt_sample(struct intel_pt_queue *ptq)
thread_stack__event(ptq->thread, ptq->flags, state->from_ip,
state->to_ip, ptq->insn_len,
state->trace_nr);
+ else
+ thread_stack__set_trace_nr(ptq->thread, state->trace_nr);

if (pt->sample_branches) {
err = intel_pt_synth_branch_sample(ptq);
--
1.9.1


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