Thread waiting in a multithreaded processor architecture

A method performed by a multithreaded processing system comprising a processing core and a transactional memory system, comprising:

• starting, by a first thread on the processing core, a task by starting to execute a plurality of task instructions;
• initiating, by the first thread, an atomic memory transaction using the transactional memory system, including:
• specifying, to the transactional memory system, at least a first memory address for the atomic memory transaction;
• and
• temporarily ceasing the task by not proceeding to execute the task instructions;
• receiving, by the first thread, a signal as a consequence of a second thread accessing the first memory address specified for the atomic memory transaction;
• and
• as a consequence of receiving the signal, resuming the task, by the first thread, and continuing to execute the task instructions.

A system comprising:

• a processor configured to execute a plurality of threads including at least a first thread and a second thread;
• and
• a memory system for executing atomic memory transactions,
• wherein the system is configured to perform operations including:
• initiating an atomic memory transaction in the first thread while executing the second thread;
• aborting the transaction as a consequence of determining that at least one memory address specified for the transaction is accessed by a thread other than the first thread;
• and
• executing task instructions in the first thread as a consequence of aborting the transaction.