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Wait on query results

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This shouldn't be necessary, but was causing NOT_READY errors.
This commit is contained in:
Raph Levien 2021-10-18 12:23:06 -07:00
parent 6039916631
commit a3d3f39fbd
1 changed files with 5 additions and 1 deletions
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6
piet-gpu-hal/src/vulkan.rs
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@ -708,12 +708,16 @@ impl crate::backend::Device for VkDevice {
unsafe fn fetch_query_pool(&self, pool: &Self::QueryPool) -> Result<Vec<f64>, Error> {
let device = &self.device.device;
let mut buf = vec![0u64; pool.n_queries as usize];
// It's unclear to me why WAIT is needed here, as the wait on the command buffer's
// fence should make the query available, but otherwise we get sporadic NOT_READY
// results (Windows 10, AMD 5700 XT).
let flags = vk::QueryResultFlags::TYPE_64 | vk::QueryResultFlags::WAIT;
device.get_query_pool_results(
pool.pool,
0,
pool.n_queries,
&mut buf,
vk::QueryResultFlags::TYPE_64,
flags,
)?;
let ts0 = buf[0];
let tsp = self.timestamp_period as f64 * 1e-9;