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Merge pull request #99 from Burning1020/perf-test 

runc-shim: Update README with performance test
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Maksym Pavlenko 2022-10-16 11:02:18 -07:00 committed by GitHub
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crates/runc-shim/README.md
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@ -25,3 +25,21 @@ $ sudo ctr run --rm --runtime io.containerd.runc.v2-rs -t docker.io/library/hell
```
You can run a container by `ctr`, `crictl` or kubernetes API.
## Performance test
### Memory overhead
Three different kinds of shim binaries are used to compare memory overhead, first is `containerd-shimv2-runc-v2`
compiled by golang, next is our sync `containerd-shim-runc-v2-rs` and the last one is our async `containerd-shim-runc-v2-rs`
but limited to 2 work threads.
We run a *busybox* container inside a pod on a *16U32G Ubuntu20.04* mechine with *containerd v1.6.8* and *runc v1.1.4*.
To measure the memory size of shim process we parse the output of *smaps* file and add up all RSS segments.
In addition, we also run 100 pods and collect the total memory overhead.
| | Single Process RSS | 100 Processes RSS |
| :----------------------------------------------------------- | :----------------- | :---------------- |
| containerd-shim-runc-v2 | 11.02MB | 1106.52MB |
| containerd-shim-runc-v2-rs(sync) | 3.45MB | 345.39MB |
| containerd-shim-runc-v2-rs(async, limited to 2 work threads) | 3.90MB | 396.83MB |