Deterministic replay of a multi-threaded trace on a multi-threaded processor

A method comprising:

• receiving graphics processing unit (GPU) program code for tracing, the program code including a plurality of instructions;
• analyzing the plurality of instructions to identify instructions of the program code that are events requiring synchronization;
• instrumenting each of the identified events to generate instrumented program code;
• executing the instrumented program code on a plurality of hardware threads of the GPU to generate trace data;
• and
• emulating the trace data utilizing an emulator on a plurality of hardware traces of a central processing unit (CPU), including replaying the identified events according to an order of occurrence of the identified events.

An apparatus comprising:

• one or more processors including a central processing unit (CPU) having a plurality of hardware threads and a graphics processing unit (GPU) having a plurality of hardware threads;
• a memory for storage of data including program data for tracing;
• wherein the one or more processors are to:
• receive GPU program code for tracing, the program code including a plurality of instructions;
• analyze the plurality of instructions to identify instructions of the program code that are events requiring synchronization;
• instrument each of the identified events to generate instrumented program code;
• execute the instrumented program code on the plurality of hardware threads of the GPU to generate trace data;
• and
• emulate the trace data utilizing an emulator on the plurality of hardware traces of the CPU, including replaying the identified events according to an order of occurrence of the identified events.