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Turn off reuse of command buffers for now

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It worked ok on Vulkan but is causing problems on DX12 and Metal. Punt
for now and come back to this later when we do more sophisticated
resource management.
This commit is contained in:
Raph Levien 2021-05-31 21:03:35 -07:00
parent 87a84eb490
commit 074fafad1e
2 changed files with 9 additions and 2 deletions
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2
piet-gpu-hal/src/dx12.rs
View file

@ -459,14 +459,12 @@ impl crate::backend::CmdBuf<Dx12Device> for CmdBuf {
// This is a bit of a mess. Returning the allocator to the free pool
// makes sense if the command list will be dropped, but not if it will
// be reused. Probably need to implement some logic on drop.
/*
if let Some(free_allocators) = self.free_allocators.upgrade() {
free_allocators
.lock()
.unwrap()
.push(self.allocator.take().unwrap());
}
*/
}
unsafe fn dispatch(

9
piet-gpu-hal/src/hub.rs
View file

@ -169,6 +169,11 @@ impl Session {
let mut item = pending.swap_remove(i);
// TODO: wait is superfluous, can just reset
let _ = self.0.device.wait_and_reset(vec![&mut item.fence]);
// Reuse of command buffers works on Vulkan, but not at all on
// Metal and is problematic on DX12 (the allocator is returned)
// to the pool. Punt for now.
/*
let mut pool = self.0.cmd_buf_pool.lock().unwrap();
pool.push((item.cmd_buf, item.fence));
std::mem::drop(item.resources);
@ -176,6 +181,7 @@ impl Session {
pool.push((staging_cmd_buf.cmd_buf, staging_cmd_buf.fence));
std::mem::drop(staging_cmd_buf.resources);
}
*/
} else {
i += 1;
}
@ -562,11 +568,14 @@ impl SubmittedCmdBuf {
unsafe {
session.device.wait_and_reset(vec![&mut item.fence])?;
}
// See discussion in `poll_cleanup`
/*
session
.cmd_buf_pool
.lock()
.unwrap()
.push((item.cmd_buf, item.fence));
*/
std::mem::drop(item.resources);
}
// else session dropped error?