/* FIXME: This code sometimes fails with an "org.jinterop.dcom.common.JIException: An internal error occurred. [0x8001FFFF]"
* on Windows 2008 */
public int getCPUUsage() throws JIException {
System.gc();
JIVariant results[] =
service_dispatch.callMethodA(
"Get",
new Object[] {
new JIString("Win32_PerfRawData_PerfOS_Processor.Name='_Total'"),
new Integer(0),
JIVariant.OPTIONAL_PARAM()
});
IJIDispatch wbemObject_dispatch =
(IJIDispatch) JIObjectFactory.narrowObject((results[0]).getObjectAsComObject());
long ppt =
Long.parseLong(
wbemObject_dispatch.get("PercentProcessorTime").getObjectAsString().getString());
long tss =
Long.parseLong(
wbemObject_dispatch.get("TimeStamp_Sys100NS").getObjectAsString().getString());
if (this.percentprocessortime == -1 && this.timestamp == -1) {
this.percentprocessortime = ppt;
this.timestamp = tss;
return -1;
}
double load =
(1 - ((double) (this.percentprocessortime - ppt) / (double) (this.timestamp - tss))) * 100;
this.percentprocessortime = ppt;
this.timestamp = tss;
return (int) Math.round(load);
}
private static double round(double d, int dec_places) {
return ((double) Math.round(d * Math.pow(10, dec_places))) / Math.pow(10, dec_places);
}
