Scyld ClusterWare HPC: Reference Guide
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bproc_nodenumber

Name

bproc_nodenumber -- Get the node number based on the given IP address.

Synopsis

#include <sys/bproc.h>

int bproc_nodenumber (struct sockaddr * addr, int size);

Arguments

addr: pointer to a struct sockaddr, that has the IP filled in
size: The size of addr

Description

Retrieves the IP address from the sockaddr structure and provides the number of the node with that address. There is a direct one-to-one mapping of node number to IP address as given in the /etc/beowulf/config file. Node numbering starts at 0 with the first IP address in the range and increments by 1 up to the last IP address in the range.

Return Value

Returns the node number associated with the IP address.

Returns BPROC_NODE_NONE if no valid node was found.

Errors

EFAULT: addr points to memory that is not accessible by the program.
EIO: There was an I/O error.
ENOMEM: Out of memory error.

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