Bill Hollings 9633f4843d Improve accuracy of VkPhysicalDeviceLimits::timestampPeriod.
If using GPU counters, on all Apple GPUs lock timestampPeriod to 1.0,
since Apple GPUs use nanoseconds, and on non-Apple GPUs, dynamically
adapt value of timestampPeriod by correlating GPU ticks with GPU ticks.

If using CPU sync, set timestampPeriod to OS CPU timestamp tick period.
2021-12-28 17:19:11 -05:00
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