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Dangerous --vsync=false flag.

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This commit is contained in:
Ben Vanik
2015-01-03 01:32:59 -08:00
parent c6f0ce7a1e
commit 858f70549f
5 changed files with 34 additions and 20 deletions
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37
src/xenia/gpu/gl4/command_processor.cc
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@@ -123,22 +123,23 @@ void CommandProcessor::WorkerMain() {
while (worker_running_) {
uint32_t write_ptr_index = write_ptr_index_.load();
while (write_ptr_index == 0xBAADF00D ||
read_ptr_index_ == write_ptr_index) {
if (write_ptr_index == 0xBAADF00D || read_ptr_index_ == write_ptr_index) {
SCOPE_profile_cpu_i("gpu", "xe::gpu::gl4::CommandProcessor::Stall");
// Check if the pointer has moved.
// We wait a short bit here to yield time. Since we are also running the
// main window display we don't want to pause too long, though.
// YieldProcessor();
PrepareForWait();
const int wait_time_ms = 5;
if (WaitForSingleObject(write_ptr_index_event_, wait_time_ms) ==
WAIT_TIMEOUT) {
ReturnFromWait();
// We've run out of commands to execute.
// We spin here waiting for new ones, as the overhead of waiting on our
// event is too high.
//PrepareForWait();
do {
// TODO(benvanik): if we go longer than Nms, switch to waiting?
// It'll keep us from burning power.
// const int wait_time_ms = 5;
// WaitForSingleObject(write_ptr_index_event_, wait_time_ms);
SwitchToThread();
MemoryBarrier();
write_ptr_index = write_ptr_index_.load();
continue;
}
ReturnFromWait();
} while (write_ptr_index == 0xBAADF00D ||
read_ptr_index_ == write_ptr_index);
//ReturnFromWait();
}
assert_true(read_ptr_index_ != write_ptr_index);
@@ -925,7 +926,13 @@ bool CommandProcessor::ExecutePacketType3_WAIT_REG_MEM(RingbufferReader* reader,
// Wait.
if (wait >= 0x100) {
PrepareForWait();
Sleep(wait / 0x100);
if (!FLAGS_vsync) {
// User wants it fast and dangerous.
SwitchToThread();
} else {
Sleep(wait / 0x100);
}
MemoryBarrier();
ReturnFromWait();
} else {
SwitchToThread();