load¶

This method returns the load average for 1 minute, 5 minutes and 15 minutes as an array.

On Linux, Solaris, FreeBSD, NetBSD and OpenBSD systems, it will make a call to "getloadavg".

If /proc/loadavg is available on non-Cygwin systems, it will call "proc_loadavg".

Otherwise, it will attempt to parse the output of "uptime".

On error, it will return an array of "undef" values.

As of v0.29, you can override the default function by changing $Sys::CpuLoad::LOAD:

  use Sys::CpuLoad 'load';
  no warnings 'once';
  $Sys::CpuLoad::LOAD = 'uptimr';
  @load = load();

If you are writing code to work on multiple systems, you should use the "load" function. But if your code is intended for specific systems, then you should use the appropriate function.

getloadavg¶

This is a wrapper around the system call to "getloadavg".

If this call is unavailable, or it is fails, it will return "undef".

Added in v0.22.

proc_loadavg¶

If /proc/loadavg is available, it will be used.

If the data cannot be parsed, it will return "undef".

Added in v0.22.

uptime¶

Parse the output of uptime.

If the uptime executable cannot be found, or the output cannot be parsed, it will return "undef".

Added in v0.22.

As of v0.24, you can override the executable path by setting $Sys::CpuLoad::UPTIME, e.g.

  use Sys::CpuLoad 'uptime';
  no warnings 'once';
  $Sys::CpuLoad::UPTIME = '/usr/bin/w';
  @load = uptime();