Messages in this thread | | | Date | Thu, 23 Apr 2015 09:12:38 -0500 (CDT) | From | Christoph Lameter <> | Subject | Re: Interacting with coherent memory on external devices |
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On Wed, 22 Apr 2015, Paul E. McKenney wrote:
> Agreed, the use case that Jerome is thinking of differs from yours. > You would not (and should not) tolerate things like page faults because > it would destroy your worst-case response times. I believe that Jerome > is more interested in throughput with minimal change to existing code.
As far as I know Jerome is talkeing about HPC loads and high performance GPU processing. This is the same use case.
> Let's suppose that you and Jerome were using GPGPU hardware that had > 32,768 hardware threads. You would want very close to 100% of the full > throughput out of the hardware with pretty much zero unnecessary latency. > In contrast, Jerome might be OK with (say) 20,000 threads worth of > throughput with the occasional latency hiccup. > > And yes, support for both use cases is needed.
What you are proposing for High Performacne Computing is reducing the performance these guys trying to get. You cannot sell someone a Volkswagen if he needs the Ferrari.
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