beostat_get_cpu_percent
Name
beostat_get_cpu_percent -- get the CPU usage on a node
Synopsis
float beostat_get_cpu_percent (int node, int cpu);
Arguments
- node
The node to query
- cpu
The CPU index on the particular node
Description
beostat_get_cpu_percent will get the current CPU usage as a float between 0.0 and 1.0.
Examples
printf ("CPU 0 on node 3 is %f percent busy.\n", beostat_get_cpu_percent (3, 0)); |
Return Value
Return a float between 0.0 and 1.0. If an error occurs, it will return -1.0.
Errors
This function relies on the Beostat subsystem, which consists of the proc filesystem on the remote node, the sendstats daemon on the remote node, the recvstats daemon on the master node, and two shared memory files in the directory /var/shm. If any part of the system breaks down, this function could fail.