AnsweredAssumed Answered

host-device latencies?

Question asked by smato2018 on Feb 28, 2019
Latest reply on Mar 1, 2019 by dipak

Doing recently some benchmarks and wonder if my host-device latencies are
bound to my older hardware or are similar on newer systems?

 

OS: Ubuntu 18.04 x86-64
Device: AMD Radeon HD 7750

 

OpenCL gpu kernel calls (terminated with clfinish), 1 million threads, no memory buffer transfer and empty kernel:

 

~8K calls per second

 

OpenCL gpu kernel calls (terminated with clfinish), 1 million threads, with 8 KB memory write and 4 KB memory read transfer and empty kernel:

 

~3K calls per second

 

Note that my machine is a bit outdated:

 

- PCIe via Northbridge
- PCIe 2.0
- only 8 lanes per slot

 

Maybe on newer systems the latencies do not hurt at all?

 

Thanks in advance,
Srdja

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