rocm-systems/projects/rocprofiler-sdk/samples/thread_trace

Thread Trace and ROCprof Trace Decoder

Services

• Thread trace in device profiling mode
• ROCprof Trace Decoder decodes the received thread trace data
• Thread trace start/stop using roctx

Properties

agent.cpp:

• Configures thread trace in all GPU agents found with rocprofiler_configure_device_thread_trace_service
• Waits until roctxProfilerResume is called to start thread trace
• Stops tracing at roctxProfilerPause
• Receives the trace data in shader_data_callback and calls rocprofiler_trace_decode to decode the data
• rocprofiler_trace_decode calls parse (a lambda)
• parse receives the dedecoded data and increments hitcount/latencies by pc address
• At application end, tool_fini calls gen_output_stream to write the top hotspots into thread_trace.log

main.cpp:

• Defines a few different kernels and runs them
• The first loop iteration warms up the kernels
• The second iteration calls roctxProfilerResume to start thread trace
• After the loop ends, roctxProfilerPause is called to stop tracing