Shaowei Song

@zhanhaozhao @yulangz I understand the problems you have encountered which are 1. performance degradation while reaching to a threshold of `innodb_buffer_pool_size` less than EPC size; 2. Require more `user_space_size` than...

@zhanhaozhao Thanks for your hard work here. I may give some hints for you to root cause these. As for larger `user_space_size`, you can check MySQL memory usage at runtime...

Latest plan: | Module | Description | Assignee | | ------------------------- | ------------------------------------------------------------ | -------- | | `Ext2` | - Originated from [Ext2-Asterinas](https://github.com/asterinas/asterinas/tree/main/kernel/aster-nix/src/fs/ext2)- To port Ext2-Asterinas to Occlum, several changes...

Hi @allvphx , thanks for using Occlum and try some demos. According to your error log, it seems the Occlum failed to initialize the rootfs at a very early stage....

**Symptom** Current bench results show that SyncIoDisk beats IoUringDisk up to 54% when concurrency is low, while IoUringDisk gradually overtakes SyncIoDisk when concurrency increases. Bench result: (4 vcpu, 2GB data,...

Workaround: Use `std::os::unix::fs::FileExt::read_at` and `write_at` API, remove the lock. Bench result:  Code: 

Improvement: Use `libc::ocall::preadv64`and`pwritev64` API. Bench result:  Code: