Hi Leo
On 1/9/21 7:44 AM, Leo Yan wrote:
From: Suzuki K Poulose <[email protected]>
The pid of the task could be traced as VMID when the kernel is
running at EL2. Teach the decoder to look for vmid when the
context_id is invalid but we have a valid VMID.
Thank you again for cleaning up this ! Please see one comment
below.
Cc: Mike Leach <[email protected]>
Cc: Mathieu Poirier <[email protected]>
Cc: Al Grant <[email protected]>
Co-developed-by: Leo Yan <[email protected]>
Signed-off-by: Suzuki K Poulose <[email protected]>
Signed-off-by: Leo Yan <[email protected]>
---
.../perf/util/cs-etm-decoder/cs-etm-decoder.c | 32 ++++++++++++++++---
1 file changed, 28 insertions(+), 4 deletions(-)
diff --git a/tools/perf/util/cs-etm-decoder/cs-etm-decoder.c
b/tools/perf/util/cs-etm-decoder/cs-etm-decoder.c
index cd007cc9c283..9e81169dfa76 100644
--- a/tools/perf/util/cs-etm-decoder/cs-etm-decoder.c
+++ b/tools/perf/util/cs-etm-decoder/cs-etm-decoder.c
@@ -6,6 +6,7 @@
* Author: Mathieu Poirier <[email protected]>
*/
+#include <linux/coresight-pmu.h>
#include <linux/err.h>
#include <linux/list.h>
#include <linux/zalloc.h>
@@ -500,13 +501,36 @@ cs_etm_decoder__set_tid(struct cs_etm_queue *etmq,
const ocsd_generic_trace_elem *elem,
const uint8_t trace_chan_id)
{
- pid_t tid;
+ pid_t tid = -1;
+ u64 pid_fmt;
+ int ret;
- /* Ignore PE_CONTEXT packets that don't have a valid contextID */
- if (!elem->context.ctxt_id_valid)
+ ret = cs_etm__get_pid_fmt(trace_chan_id, &pid_fmt);
+ if (ret)
+ return OCSD_RESP_FATAL_SYS_ERR;
The patch looks fine to me. I am wondering if this can be cached somewhere in
the etmq to avoid doing the search everytime we hit a CID ? Surely for a
session,
this woudn't change and thus for the decoder life time.
Cheers
Suzuki
