On 05/06/18 17:50, Tvrtko Ursulin wrote:
From: Tvrtko Ursulin <tvrtko.ursulin@xxxxxxxxx>
A miminal hack to parse the new tracepoint format and invent new "ring
id's" based on engine class and instance.
Signed-off-by: Tvrtko Ursulin <tvrtko.ursulin@xxxxxxxxx>
Cc: Lionel Landwerlin <lionel.g.landwerlin@xxxxxxxxx>
---
overlay/gpu-perf.c | 36 ++++++++++++++++++++++++++++--------
1 file changed, 28 insertions(+), 8 deletions(-)
diff --git a/overlay/gpu-perf.c b/overlay/gpu-perf.c
index ea3480050ab9..e77125672088 100644
--- a/overlay/gpu-perf.c
+++ b/overlay/gpu-perf.c
@@ -85,7 +85,8 @@ struct tracepoint {
int device_field;
int ctx_field;
- int ring_field;
+ int class_field;
+ int instance_field;
int seqno_field;
int global_seqno_field;
int plane_field;
@@ -151,8 +152,10 @@ tracepoint_id(int tp_id)
tp->device_field = f;
} else if (!strcmp(tp->fields[f].name, "ctx")) {
tp->ctx_field = f;
- } else if (!strcmp(tp->fields[f].name, "ring")) {
- tp->ring_field = f;
+ } else if (!strcmp(tp->fields[f].name, "class")) {
+ tp->class_field = f;
+ } else if (!strcmp(tp->fields[f].name, "instance")) {
+ tp->instance_field = f;
That looks good to me. We only support the most recent kernel?
} else if (!strcmp(tp->fields[f].name, "seqno")) {
tp->seqno_field = f;
} else if (!strcmp(tp->fields[f].name, "global_seqno")) {
@@ -175,6 +178,23 @@ tracepoint_id(int tp_id)
tracepoints[tp_id].fields[ \
tracepoints[tp_id].field_name##_field].offset))
+#define READ_TP_FIELD_U16(sample, tp_id, field_name) \
+ (*(const uint16_t *)((sample)->tracepoint_data + \
+ tracepoints[tp_id].fields[ \
+ tracepoints[tp_id].field_name##_field].offset))
+
+#define GET_RING_ID(sample, tp_id) \
+({ \
+ unsigned char class, instance, ring; \
+\
+ class = READ_TP_FIELD_U16(sample, tp_id, class); \
+ instance = READ_TP_FIELD_U16(sample, tp_id, instance); \
+\
+ ring = class * 2 + instance; \
Do you want to make it clear that we cannot have more than 2 instances
per class?
+\
+ ring; \
+})
+
static int perf_tracepoint_open(struct gpu_perf *gp, int tp_id,
int (*func)(struct gpu_perf *, const void *))
{
@@ -313,7 +333,7 @@ static int request_add(struct gpu_perf *gp, const void *event)
if (comm == NULL)
return 0;
- comm->nr_requests[READ_TP_FIELD_U32(sample, TP_GEM_REQUEST_ADD, ring)]++;
+ comm->nr_requests[GET_RING_ID(sample, TP_GEM_REQUEST_ADD)]++;
return 1;
}
@@ -329,7 +349,7 @@ static int ctx_switch(struct gpu_perf *gp, const void *event)
{
const struct sample_event *sample = event;
- gp->ctx_switch[READ_TP_FIELD_U32(sample, TP_GEM_RING_SWITCH_CONTEXT, ring)]++;
+ gp->ctx_switch[GET_RING_ID(sample, TP_GEM_RING_SWITCH_CONTEXT)]++;
return 1;
}
@@ -367,8 +387,8 @@ static int wait_begin(struct gpu_perf *gp, const void *event)
wait->context = READ_TP_FIELD_U32(sample, TP_GEM_REQUEST_WAIT_BEGIN, ctx);
wait->seqno = READ_TP_FIELD_U32(sample, TP_GEM_REQUEST_WAIT_BEGIN, seqno);
wait->time = sample->time;
- wait->next = gp->wait[READ_TP_FIELD_U32(sample, TP_GEM_REQUEST_WAIT_BEGIN, ring)];
- gp->wait[READ_TP_FIELD_U32(sample, TP_GEM_REQUEST_WAIT_BEGIN, ring)] = wait;
+ wait->next = gp->wait[GET_RING_ID(sample, TP_GEM_REQUEST_WAIT_BEGIN)];
+ gp->wait[GET_RING_ID(sample, TP_GEM_REQUEST_WAIT_BEGIN)] = wait;
return 0;
}
@@ -377,7 +397,7 @@ static int wait_end(struct gpu_perf *gp, const void *event)
{
const struct sample_event *sample = event;
struct gpu_perf_time *wait, **prev;
- uint32_t engine = READ_TP_FIELD_U32(sample, TP_GEM_REQUEST_WAIT_END, ring);
+ uint32_t engine = GET_RING_ID(sample, TP_GEM_REQUEST_WAIT_END);
uint32_t context = READ_TP_FIELD_U32(sample, TP_GEM_REQUEST_WAIT_END, ctx);
uint32_t seqno = READ_TP_FIELD_U32(sample, TP_GEM_REQUEST_WAIT_END, seqno);
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