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vulkan: discard dependencies when explicitly waiting for execution 

This reduces memory needed dramatically, as unneeded resources
can be immediately returned to the pool.
Although waitforfences is threadsafe, we add a mutex wait around
it, as the mutex fence in combination with waitforfences assures
us that no other thread will reset the fence in the meanwhile
whilst the mutex is locked. This allows is to call
ff_vk_exec_discard_deps.
This commit is contained in:
Lynne 2023-06-07 01:16:29 +02:00
parent 975cd48bb3
commit 5f1be341c2
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1 changed files with 3 additions and 0 deletions
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libavutil/vulkan.c
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@ -480,7 +480,10 @@ FFVkExecContext *ff_vk_exec_get(FFVkExecPool *pool)
void ff_vk_exec_wait(FFVulkanContext *s, FFVkExecContext *e)
{
FFVulkanFunctions *vk = &s->vkfn;
pthread_mutex_lock(&e->lock);
vk->WaitForFences(s->hwctx->act_dev, 1, &e->fence, VK_TRUE, UINT64_MAX);
ff_vk_exec_discard_deps(s, e);
pthread_mutex_unlock(&e->lock);
}
int ff_vk_exec_start(FFVulkanContext *s, FFVkExecContext *e)