Method and apparatus for processing an event occurrence within a multithreaded processor

A system including:

• a memory to store a first thread, a second thread, and a data;
• a multithreaded processor responsive to a first event indication for the first thread, to identify an event handling point in the second thread and to invoke a first event handler at the event handling point to handle the first event occurrence;
• said multithreaded processor comprising a writeback detector to detect a writeback event for either of the first thread or the second thread and to assert a writeback signal to initiate writing a portion of the data back to the memory;
• and
• a bus to transmit the first thread and the second tread to the multithreaded processor and to transmit the portion of the data back to the memory.

A system including:

• a multithreaded processor comprising an event detector to detect an indication of an external event for a first thread;
• responsive to the detection of the indication of the external event for the first thread, to monitor a second thread being processed within the multithreaded processor to detect a clearing point for the second thread;
• and, responsive to the detection of the clearing point for the second thread, to clear a functional unit within the multithreaded processor for at least the first thread;
• a memory to store the plurality of threads;
• and
• a bus to deliver the plurality of threads to the multithreaded processor, wherein the external event is generated outside the multithreaded processor.

A method including:

• detecting a first event indication for a first thread;
• responsive to the detection of the first event indication for the first thread, monitoring a second thread being processed within the multithreaded processor to detect a clearing point for the second thread;
• and
• responsive to the detection of the clearing point for the second thread, clearing a functional unit within the multithreaded processor for at least the first thread.