[Hyperic-hq-discuss] Sigar.getProcCpu(id) returns invalid data

[guy_vt <sig...@hy...>]

I want to use Sigar to monitor a running process for CPU load. So far I have only gotten values smaller than 1 percent. So I wanted to test how it would handle higher CPU values and whether it gave correct values under load. It would appear that it doesnt:

I am using the following code:

try
		{
			Sigar sigar = new Sigar();
			long id = sigar.getPid();
			ProcCpu cpu = sigar.getProcCpu(id);
			System.out.println(cpu.toString());
			
			while (true)
			{
				cpu = sigar.getProcCpu(id);
				System.out.println("cpu=" + cpu.toString());
			}
		}
		catch (Exception e)
		{
			e.printStackTrace();
		}


I get the following output:

cpu={LastTime=1276071236204, StartTime=1276071231143, Percent=8.504036623604765E-299, Sys=296, User=1388, Total=1684}
cpu={LastTime=1276071236204, StartTime=1276071231143, Percent=8.504036623604765E-299, Sys=296, User=1388, Total=1684}
cpu={LastTime=1276071236205, StartTime=1276071231143, Percent=16.0, Sys=312, User=1388, Total=1700}

As you can see it occasionnaly returns 15-16% but appart from that it returns a rediculously low values. Another problem is dat the javaw (I run under Eclipse) process consumes more than the 15-16% !

I am running on Windows Vista using a Sun java 1.5.0_15