I think think that may be exactly what I was looking for. I'm going to dig into it a bit deeper tomorrow when I get back to work. If this answers my question, I'll close the question and assign points. Thank you!
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How is System.currentTimeMillis implemented in Sun's JRE 5?
I work on supporting a server application written in Java, using a couple versions of the Sun JRE, all in the JRE 5 line. In working with some of our customers I've run into some weird issues with AMD Dual-core servers. It appears that if software uses the RDTSC (Read TimeStamp Counter) to determine the current time there is likely a discrepancy between running this command if on Core 1 compared to running it on Core 2 due to power management slowing down the core frequency at times.
What I'm after is how did the JRE implement the System.currentTimeMillis? Looks like it's a JNI method meaning it runs native C or C++ code. I've downloaded the JRE source, but am missing something when trying to determine where that function is implemented in native code.
Just to be clear, I'm looking to know whether the JRE native function uses RDTSC, QueryPerformanceCounters, or some other method to get the system time. Thanks!
(We are currently running JRE 1.5.0_10-b03.)
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by: objectsPosted on 2009-08-19 at 17:57:55ID: 25138625
http://helpdesk.objects.co
also may be of interest
http://helpdesk.objects.co