Behaviour of multi queues on single device.

[shenuo]

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?

[HemanthCH_Intel]

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

[shenuo]

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 !

[HemanthCH_Intel]

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.

[HemanthCH_Intel]

Hi,

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

Thanks & Regards,

Hemanth

[HemanthCH_Intel]

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