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Date: Sat, 19 Jan 2013 10:56:44 +0530
From: Sayantan Datta <>
Subject: Re: Mulit-gpu using claudio's interfaces

On Sat, Jan 19, 2013 at 10:41 AM, Sayantan Datta <> wrote:

> Hi Claudio,magnum,
> I think I am not on the same page as everyone else regarding the
> ocl_gpu_id and device_id in common-opencl.h.
> Caludio, I see you have provided two functions to translate the sequential
> id(s) to platform and device id(s). But I guess the
> devices[],ques[],contexts[],program[] are indexed by ocl_gpu_id ,right ? If
> so you don't seem to have provided any function to transform the sequential
> id(s) to ocl_gpu_id. Am I supposed to calculate that internally in the
> format ? If yes, then please provide the math.
> Also I see that the -device option begins from 0. I think Frank and magnum
> suggested it should start from 1. Anyways, it is not a big issue I guess.
> Regards,
> Sayantan

Okay ,I think I've got it. It is the ocl_device_list[] which maps directly
to gpu_id right ?


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