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turnip: improve perfetto sync_timestamp

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tu_device_get_gpu_timestamp takes >100us on my otherwise idle sc7180.
Read the cpu block again after the call returns.

Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/18238>
This commit is contained in:
Chia-I Wu 2022-08-22 18:15:24 -07:00 • committed by Marge Bot
parent ce0e13155d
commit 91a0411d2a
1 changed files with 7 additions and 2 deletions
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9
src/freedreno/vulkan/tu_perfetto.cc
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@ -189,10 +189,15 @@ sync_timestamp(struct tu_device *dev)
if (cpu_ts < next_clock_sync_ns)
return;
if (tu_device_get_gpu_timestamp(dev, &gpu_ts)) {
if (tu_device_get_gpu_timestamp(dev, &gpu_ts)) {
PERFETTO_ELOG("Could not sync CPU and GPU clocks");
return;
}
}
/* get cpu timestamp again because tu_device_get_gpu_timestamp can take
* >100us
*/
cpu_ts = perfetto::base::GetBootTimeNs().count();
uint64_t current_suspend_count = 0;
/* If we fail to get it we will use a fallback */