Determining physical nodes on Intel iPSC/2?

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From: Greg Kwan
Date: Wed, 09 Sep 1992 12:24

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Does anyone know of a way to determine on which physical node a
process is running on the iPSC/2? Intel gave an undocumented/
unsupported call, but it returns unexpected values. For example,
when allocating a 16 node cube, it returned:
node  0 = 512, node  1 = 513, node  2 = 516, node  3 = 517,
node  4 = 520, node  5 = 521, node  6 = 524, node  7 = 525,
node  8 = 528, node  9 = 529, node 10 = 532, node 11 = 533,
node 12 = 536, node 13 = 537, node 14 = 540, node 15 = 541.

Are these just offset by the number 512? Currently, our cube
only has 30 nodes (2 compute nodes are defective), but it
appears that the intermediate physical locations would be
present in a fully allocated (32 node) cube. To put it an-
other way, how would one determine how many links a message
passes through from one node to another?

Thanks for any help.

greg

gkwan@balboa.eng.uci.edu

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From: gkwan@balboa.eng.uci.edu (Greg Kwan)
Newsgroups: fj.mail-lists.parallel
Subject: Determining physical nodes on Intel iPSC/2?
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Date: 9 Sep 92 12:24:06 GMT
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