Memory usage & CPU (SMP) usage functions

Hi friends,

Which system calls can provide me detailed information (structures is preferable) on RedHat 7.2 regarding:

1. Memory usage (similar to the info inculded in /proc/meminfo)

2. CPU usage (SMP configuration - both CPUs, similar to the info we can get from "gtop")

3. Disk usage - "statfs" is very good - so it's a reference to which kind of info I expect from 1 & 2.

Thanks,

Avi

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