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venus: trace vn_ring_wait_space 

It is good to know that we run out of ring space and have to wait.  This
happens easily with fossilize-replay because encoding a
vkCreateGraphicsPipeline takes microseconds while executing it can take
milliseconds, >100ms sometimes.

Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/14966>
This commit is contained in:
Chia-I Wu 2022-02-09 15:48:36 -08:00 committed by Marge Bot
parent 7cb2e9a8f0
commit 5f3e50b27c
1 changed files with 29 additions and 8 deletions
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37
src/virtio/vulkan/vn_ring.c
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@ -101,19 +101,40 @@ vn_ring_wait_seqno(const struct vn_ring *ring, uint32_t seqno)
} while (true);
}
static bool
vn_ring_has_space(const struct vn_ring *ring,
uint32_t size,
uint32_t *out_head)
{
const uint32_t head = vn_ring_load_head(ring);
if (likely(ring->cur + size - head <= ring->buffer_size)) {
*out_head = head;
return true;
}
return false;
}
static uint32_t
vn_ring_wait_space(const struct vn_ring *ring, uint32_t size)
{
assert(size <= ring->buffer_size);
/* see the reasoning in vn_ring_wait_seqno */
uint32_t iter = 0;
do {
const uint32_t head = vn_ring_load_head(ring);
if (ring->cur + size - head <= ring->buffer_size)
return head;
vn_relax(&iter, "ring space");
} while (true);
uint32_t head;
if (likely(vn_ring_has_space(ring, size, &head)))
return head;
{
VN_TRACE_FUNC();
/* see the reasoning in vn_ring_wait_seqno */
uint32_t iter = 0;
do {
vn_relax(&iter, "ring space");
if (vn_ring_has_space(ring, size, &head))
return head;
} while (true);
}
}
void