[SSI-devel] Re: Parallel make on SSI

[Matt C. <mco...@am...>]

Hi Bruce-

Thanks for the update regarding parallel makes. We haven't been able to 
get machines to implement SSI on here yet, but we're hoping to have it 
running in a test environment soon. I think the important part is to be 
able to distribute all those 'cc' processes across the nodes. The 
challenge will be to roundrobin them or something, since I think they're 
going to be too short-lived to be able to analyze and migrate them once 
they've been spawned.

-matt

Walker, Bruce J wrote:
> Matt,
>     Thanks for your interest in the openSSI project and stopping by at 
> LinuxWorld.   We noticed a couple of things while you playing with the 
> system - parallel make (make -j18) was not migrating the make program 
> itself and there wasn't a good way to determine which of your processes 
> were running on which nodes.
> 
> Laura Ramirez, who works on the project, looked into the first issue and 
> discovered that make -j uses cloning.  As we discussed (I think), we 
> currently can't split cloned processes between nodes (actually there is 
> no plan to ever do that).   Without a change to make, the best we are 
> going to do is to distribute all the things the make spawns (cc's, ar's, 
> etc.).    Sometime next week we should have an initial look at the 
> performance impact spreading those processes around the cluster might have.
> 
> As for the "ps" issue, I'll send a note on the ssi-linux-devel list 
> later today to start a discussion of what we can/should do with ps to 
> address the issue of knowing where your processes are running.
> 
> Note that the "current" release (0.9.9) has problems with NFS.  If 
> anyone needs a fixed release, Brian has a 0.9.9b.  He wasn't planning on 
> putting it up on the Web (wait a bit until we have a few more 
> features/fixes), but will if there is a need.
> 
> Bruce
>