v4 is a minor update over v3 to improve the accuracy of the latency measurement. v3 used a different startup barrier mechanism which made thread #1 report a falsely large latency. http://rt.wiki.kernel.org/index.php/Preemption_Test Regards, -Greg - To unsubscribe from this list: send the line "unsubscribe linux-rt-users" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html