Replaying memory transactions while resolving memory access faults

A non-transitory computer-readable storage medium including instructions that, when executed by a multithreaded processing unit, cause the multithreaded processing unit to process virtual memory transactions by performing the steps of:

• receiving a first virtual memory transaction from a first unit;
• attempting to execute the first virtual memory transaction;
• detecting a first page fault related to the first virtual memory transaction;
• storing the first virtual memory transaction in a replay buffer;
• causing a stall condition that inhibits the first unit from generating subsequent virtual memory transactions until the first page fault has been resolved;
• and
• once the first page fault has been resolved, re-executing the first virtual memory transaction as well as at least one other virtual memory transaction stored in the replay buffer.

A system configured to process virtual memory transactions, the system comprising:

• a memory;
• and
• a multithreaded processing unit coupled to the memory and configured to:
• receive a first virtual memory transaction from a first unit;
• attempt to execute the first virtual memory transaction on the memory;
• detect a first page fault related to the first virtual memory transaction;
• store the first virtual memory transaction in a replay buffer;
• cause a stall condition that inhibits the first unit from generating subsequent virtual memory transactions until the first page fault has been resolved;
• and
• once the first page fault has been resolved, re-execute the first virtual memory transaction as well as at least one other virtual memory transaction stored in the replay buffer.