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27 lines
1.1 KiB
Markdown
27 lines
1.1 KiB
Markdown
# Thread Trace and ROCprof Trace Decoder
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## Services
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- Thread trace in device profiling mode
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- ROCprof Trace Decoder decodes the received thread trace data
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- Thread trace start/stop using roctx
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## Properties
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### [agent.cpp](agent.cpp):
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- Configures thread trace in all GPU agents found with `rocprofiler_configure_device_thread_trace_service`
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- Waits until `roctxProfilerResume` is called to start thread trace
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- Stops tracing at `roctxProfilerPause`
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- Receives the trace data in `shader_data_callback` and calls `rocprofiler_trace_decode` to decode the data
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- `rocprofiler_trace_decode` calls `parse` (a lambda)
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- `parse` receives the dedecoded data and increments hitcount/latencies by pc address
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- At application end, `tool_fini` calls `gen_output_stream` to write the top hotspots into `thread_trace.log`
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### [main.cpp](main.cpp):
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- Defines a few different kernels and runs them
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- The first loop iteration warms up the kernels
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- The second iteration calls `roctxProfilerResume` to start thread trace
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- After the loop ends, `roctxProfilerPause` is called to stop tracing
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