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u_trace: Lazy init ut->linear_alloc

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We don't want to waste memory when u_trace isn't used.

Signed-off-by: Danylo Piliaiev <dpiliaiev@igalia.com>
Reviewed-by: Konstantin Seurer <konstantin.seurer@gmail.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/41271>
This commit is contained in:
Danylo Piliaiev 2026-05-06 14:16:02 +02:00 • committed by Marge Bot
parent 7b2301f06d
commit 617da94f82
1 changed files with 19 additions and 3 deletions
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22
src/util/perf/u_trace.c
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@ -666,12 +666,21 @@ u_trace_context_process(struct u_trace_context *utctx, bool eof)
util_dynarray_clear(&utctx->flushed_traces);
}
static linear_ctx *
u_trace_get_linear_alloc(struct u_trace *ut)
{
if (!ut->linear_alloc) {
ut->linear_alloc = linear_context(NULL);
}
return ut->linear_alloc;
}
void
u_trace_init(struct u_trace *ut, struct u_trace_context *utctx)
{
memset(ut, 0, sizeof(struct u_trace));
ut->utctx = utctx;
ut->linear_alloc = linear_context(NULL);
ut->last_timestamp.buffer_index = UINT32_MAX;
ut->events = UTIL_DYNARRAY_INIT;
ut->buffers[0] = UTIL_DYNARRAY_INIT;
@ -697,6 +706,7 @@ u_trace_fini(struct u_trace *ut)
}
linear_free_context(ut->linear_alloc);
ut->linear_alloc = NULL;
ut->last_timestamp.buffer_index = UINT32_MAX;
util_dynarray_fini(&ut->events);
}
@ -761,6 +771,11 @@ u_trace_clone_append(struct u_trace_iterator begin_it,
assert(begin_it.ut == end_it.ut);
struct u_trace *from = begin_it.ut;
if (u_trace_iterator_equal(begin_it, end_it))
return;
linear_ctx *linear_alloc = u_trace_get_linear_alloc(into);
struct u_trace_buffer_view src_timestamp = {}, dst_timestamp = {}, src_indirect = {}, dst_indirect = {};
src_timestamp.buffer_index = UINT32_MAX;
src_indirect.buffer_index = UINT32_MAX;
@ -789,7 +804,7 @@ u_trace_clone_append(struct u_trace_iterator begin_it,
copy_buffer(into->utctx, cmdstream, src_buffer->buffer, 0, dst_buffer, dst_indirect.offset, src_buffer->size);
}
struct u_trace_event *dst_event = linear_alloc_child(into->linear_alloc, sizeof(struct u_trace_event) + src_event->payload_size);
struct u_trace_event *dst_event = linear_alloc_child(linear_alloc, sizeof(struct u_trace_event) + src_event->payload_size);
memcpy(dst_event, src_event, sizeof(struct u_trace_event) + src_event->payload_size);
dst_event->timestamp.buffer_index = dst_timestamp.buffer_index;
dst_event->timestamp.offset = dst_timestamp.offset + src_event->timestamp.offset;
@ -864,7 +879,8 @@ u_trace_appendv(struct u_trace *ut,
unsigned payload_sz = ALIGN_NPOT(tp->payload_sz + variable_sz, 8);
struct u_trace_event *event =
linear_alloc_child(ut->linear_alloc, sizeof(struct u_trace_event) + payload_sz);
linear_alloc_child(u_trace_get_linear_alloc(ut),
sizeof(struct u_trace_event) + payload_sz);
event->tp = tp;
event->payload_size = payload_sz;