A method for servicing threads within a multi-processor system is disclosed. In response to an input/output (I/O) request to a peripheral by a thread, a latency time is assigned to the thread such that the thread will not be interrogated until the latency time has lapsed. After the latency time is lapsed, a determination is made as to whether or not the I/O request has been responded. If the I/O request has not been responded after the latency time is lapsed, the latency time is assigned to the thread again. Otherwise, if the I/O request has been responded after the latency time is lapsed, the latency time is updated with an actual response time. The actual response time is from a time when the I/O request was made to a time when the I/O request was actually responded.