Software Only Intra-Compute Unit Redundant Multithreading for GPUs

A method for implementing redundant multithreading comprising:

• executing a first and a second work-item, wherein the first work-item performs first write operations to a first signature variable and the second work-item performs second write operations to a second signature variable;
• and
• comparing the first signature variable to the second signature variable at a comparison point.

A computer-readable storage device having computer-executable instructions stored thereon, execution of which, by a computing device, causes the computing device to perform operations comprising:

• executing a first and a second work-item, wherein the first work-item performs first write operations to a first signature variable and the second work-item performs second write operations to a second signature variable;
• and
• comparing the first signature variable to the second signature variable at a comparison point.