0aea572bff
hipEventRecord is much slower in hipclang/vdi
- Make sure default streams don't sync each other.
- Add null stream into the list of default streams.
- Code clean-up to simplify queue look-up.
Change-Id: I36e1fc8d86a600e3dce806694d95d146ed8afd03
[ROCm/hip commit: f7f7337bae]