topic Re:Behaviour of multi queues on single device. in Intel® oneAPI DPC++/C++ Compiler

Behaviour of multi queues on single device.

shenuo — Tue, 24 May 2022 03:15:54 GMT

What's the execution order of multi queues on 1 same device?

let's say

gpu_selector gs;

queue Q1(gs);

queue Q2(gs);

queue Q3(gs);

Q1.submmit(/***/);

Q2.submmit(/***/);

Q3.submmit(/***/);

are they executed 1 by 1, or it's determined by the runtime, the order is uncertain, even concurrent?

Re:Behaviour of multi queues on single device.

HemanthCH_Intel — Thu, 26 May 2022 12:48:24 GMT

Hi,

Thanks for posting in Intel Communities.

When we create multiple queues for the same device then the execution is in a serial manner(one after the other). When we create multiple contexts and multiple queues then the execution is concurrent.

Thanks & Regards,

Hemanth

Re: Re:Behaviour of multi queues on single device.

shenuo — Thu, 26 May 2022 13:05:16 GMT

I'm sorry ,still a little confused.

is that mean different device has different context?

can you give me a example to illustrate how to create concurrent queues on same device?

thanks !

Re: Behaviour of multi queues on single device.

HemanthCH_Intel — Wed, 01 Jun 2022 07:26:17 GMT

Hi,

You can refer to the sample vector add program where we created multiple contexts and multiple queues to run concurrently on a single device.

Thanks & Regards,

Hemanth.

Re:Behaviour of multi queues on single device.

HemanthCH_Intel — Wed, 08 Jun 2022 12:30:29 GMT

Hi,

We haven't heard back from you. Could you please provide an update on your issue?

Thanks & Regards,

Hemanth

Re:Behaviour of multi queues on single device.

HemanthCH_Intel — Thu, 16 Jun 2022 05:12:49 GMT

Hi,

We assume that your issue is resolved. If you need any additional information, please post a new question as this thread will no longer be monitored by Intel.

Thanks & Regards,

Hemanth