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intel/perf: Fix return of read_oa_samples_until()

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read_oa_samples_until() was returning OA_READ_STATUS_ERROR even
if already read samples, then it tried again and KMD returned 0/empty
or EAGAIN(as the read would block).

This is not causing any issue because read_oa_samples_for_query()
FALLTHROUGH OA_READ_STATUS_ERROR to OA_READ_STATUS_FINISHED
but that I think it is worthy to fix it.

Reviewed-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com>
Signed-off-by: José Roberto de Souza <jose.souza@intel.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/29421>
This commit is contained in:
José Roberto de Souza
2024-05-15 11:05:17 -07:00
committed by Marge Bot
parent 42ee8d80d9
commit 0442803eee
1 changed files with 8 additions and 0 deletions
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8
src/intel/perf/intel_perf_query.c
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@@ -964,6 +964,7 @@ read_oa_samples_until(struct intel_perf_context *perf_ctx,
exec_node_data(struct oa_sample_buf, tail_node, link);
uint32_t last_timestamp =
tail_buf->len == 0 ? start_timestamp : tail_buf->last_timestamp;
bool sample_read = false;
while (1) {
struct oa_sample_buf *buf = get_free_sample_buf(perf_ctx);
@@ -978,11 +979,17 @@ read_oa_samples_until(struct intel_perf_context *perf_ctx,
exec_list_push_tail(&perf_ctx->free_sample_buffers, &buf->link);
if (len == 0) {
if (sample_read)
return OA_READ_STATUS_FINISHED;
DBG("Spurious EOF reading i915 perf samples\n");
return OA_READ_STATUS_ERROR;
}
if (errno != EAGAIN) {
if (sample_read)
return OA_READ_STATUS_FINISHED;
DBG("Error reading i915 perf samples: %m\n");
return OA_READ_STATUS_ERROR;
}
@@ -1011,6 +1018,7 @@ read_oa_samples_until(struct intel_perf_context *perf_ctx,
last_timestamp = report[1];
offset += header->size;
sample_read = true;
}
buf->last_timestamp = last_timestamp;