[mpich-discuss] Number processes/CPU in Hydra -hostlist

[Pavan Balaji]

Thanks for the suggestion. We had gotten this request earlier too, but 
it never reached a high-enough priority. I've fixed this on my local git 
repository and will commit it in to the svn tomorrow (the svn server is 
down at the moment).

  -- Pavan

On 07/26/2010 01:56 PM, Yauheni Zelenko wrote:
> Hi!
>
> I want to suggest next patch which will allow to specify number of processes/CPU in -hostlist command line option in Hydra.
>
> Goal is to provide similar functionality as Platform LSF's LSB_MCPU_HOSTS.
>
> Host name and number of CPUs may be separated with colon or space.
>
> Changes are in /home/zelenko/Installs/GCC4.4.0/mpich2-1.3a2.src/src/pm/hydra/ui/mpich/utils., hostlist_fn()
>
> from:
>
>      while (hostname) {
>          status = HYDU_add_to_node_list(hostname, 1,&HYD_handle.node_list);
>          HYDU_ERR_POP(status, "unable to add to node list\n");
>
>          hostname = strtok(NULL, ",");
>      }
>
> to:
>
>      while (hostname) {
> 	char* num_procs_str = NULL;
> 	int num_procs = 1;
>
> 	num_procs_str = strchr(hostname, ':');
> 	if (!num_procs_str)
> 	    num_procs_str = strchr(hostname, ' ');
> 	if (num_procs_str)
> 	    {
> 		*num_procs_str = '\0';
> 		num_procs_str++;
> 		num_procs = atoi(num_procs_str);
> 	    }
>          status = HYDU_add_to_node_list(hostname, num_procs,&HYD_handle.node_list);
>          HYDU_ERR_POP(status, "unable to add to node list\n");
>
>          hostname = strtok(NULL, ",");
>      }
>
> Eugene.
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-- 
Pavan Balaji
http://www.mcs.anl.gov/~balaji