Go Torch Tool

Generate Torch Graph with Script

Run the following command to generate torch graph with profile.sh:

./profile.sh

Graph will be saved under output directory. Run ./profile -h for more information.

Generate Torch Graph with Docker

Run the following command to generate torch graph with Docker:

docker run uber/go-torch -u http://[address-of-host] -p > torch.svg

Use -u to set the listening address of pprof.

Expose Docker Profiling Endpoint

For extracting profiling data, it is required that the debug mode of Docker is turned on:

• Modify /etc/docker/daemon.json, set "debug": true.
• Run sudo kill -SIGHUP $(pidof dockerd) to send SIGHUP signal.
• Run docker info | grep -i debug.*server to see if the modification is valid.

If the remote access endpoint of Docker is off, it is required to forward traffic to a local port:

socat -d -d TCP-LISTEN:8080,fork,bind=127.0.0.1 unix:/var/run/docker.sock

Dependencies

This tool is for offline environment. The following dependencies are required for the tool: go, go-torch, flamegraph.pl, perl.