how can we find out system is in idle mode?

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Hey, I need to find out when a CPU is in Idle mode. I sould retrieve the CPU activities for about 10 minutes and then calculate the usage. First, I couldn't measure the usage in percent and second, I'm not sure whether it's going to work on a multi core CPU or not.
Thanks

Posted 17-Sep-13 19:56pm

Mojtaba Setoodeh

Updated 17-Sep-13 21:08pm

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Richard MacCutchan 18-Sep-13 3:18am

If your program is running then it won't be idle.

2 solutions

Solution 1

Check this link

how to get the system is active, idle, sleep,hibernate mode using C# ?[^]

Posted 17-Sep-13 21:49pm

_Asif_

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nv3 · Accepted Answer · 2013-09-17T22:26:00

You didn't mention the platform you are running on. On Windows I would try to use

C++

BOOL GetSystemTimes(
  LPFILETIME lpIdleTime,
  LPFILETIME lpKernelTime,
  LPFILETIME lpUserTime
);

and call that regularly, say every 10 seconds. The values you get from this call are cumulative since the start of the system. Hence you will have to do a little arithmetic to figure the CPU load averaged over the last 10 minutes.

Find some other useful information on Get CPU Usage with GetSystemTimes[^].