Jerry Wu

## Situation judge will mount /dev to standard/container/udev, but won't umount. So it's dangerous to do file operation in standard/container even the judge is stopped. ## Expectation Umount standard/container/udev before...

## Situation The file operations may block the event loop, which causes the performance to drop.

## Situation The code of event loop is copied from old code, need to refactor.

## Situation Currently, different judge instances have to run in separate directories; otherwise, the file operations will be conflict. ## Expectation Create separate working directory for each instance.

## Situation Currently, we use prefetch to solve issue #4 , but it's a little ugly and not reliable. ## Expectation Control memory limit dynamically in light of OOM events...

## Situation There is only tornado default SIGINT handler now. Some environment changes need to be recovered after exit. ## Expectation Handle SIGINT, clean sandboxes and containers.

# Situation Different Linux distributions have different file path. And their compilers have different environment requirements.

Upgrade Github runner to v2.314.1 before 2024-03-27

1

The new runner version has been released: https://github.com/actions/runner/releases/tag/v2.314.1 Past issue: #16497