Analyzing latency using Nsight systems in deepstream

It is inside gst-nvinfer. The gst-nvinfer plugin is open source. The source code is in /opt/nvidia/deepstream/deepstream/sources/libs/nvdsinfer and /opt/nvidia/deepstream/deepstream/sources/gst-plugins/gst-nvinfer. There is also source code diagram for your reference. DeepStream SDK FAQ - Intelligent Video Analytics / DeepStream SDK - NVIDIA Developer Forums