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- From: Lennox Wu <lennox.wu@gmail.com>
- To: starpu-devel@lists.gforge.inria.fr
- Subject: [Starpu-devel] About the prediction model of data transfer time
- Date: Wed, 2 Jul 2014 16:48:52 +0800
- List-archive: <http://lists.gforge.inria.fr/pipermail/starpu-devel/>
- List-id: "Developers list. For discussion of new features, code changes, etc." <starpu-devel.lists.gforge.inria.fr>
Hi all,
I am interested in that how does StarPU predict the transfer time.
I didn't find the prediction model from your papers(Was it written
somewhere?),
so I tried to find it from the source code.
I found the function "starpu_transfer_predict", is it the prediction model?
I can't understand the meaning behind the fomular
"2*(topology->ncudagpus+topology->nopenclgpus)",
could anybody explain it?
double starpu_transfer_predict(unsigned src_node, unsigned dst_node,
size_t size)
{
double bandwidth = bandwidth_matrix[src_node][dst_node];
double latency = latency_matrix[src_node][dst_node];
struct _starpu_machine_topology *topology =
&_starpu_get_machine_config()->topology;
return latency +
(size/bandwidth)*2*(topology->ncudagpus+topology->nopenclgpus);
}
Best,
Lennox
- [Starpu-devel] About the prediction model of data transfer time, Lennox Wu, 02/07/2014
- Re: [Starpu-devel] About the prediction model of data transfer time, Samuel Thibault, 02/07/2014
- Re: [Starpu-devel] About the prediction model of data transfer time, Lennox Wu, 02/07/2014
- Re: [Starpu-devel] About the prediction model of data transfer time, Samuel Thibault, 02/07/2014
- Re: [Starpu-devel] About the prediction model of data transfer time, Lennox Wu, 04/07/2014
- Re: [Starpu-devel] About the prediction model of data transfer time, Samuel Thibault, 02/07/2014
- Re: [Starpu-devel] About the prediction model of data transfer time, Lennox Wu, 02/07/2014
- Re: [Starpu-devel] About the prediction model of data transfer time, Samuel Thibault, 02/07/2014
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