Increase zeroing performance for data partition

It's possible to increase queue depth for O_DIRECT in simple cases like ours by just
submitting bigger buffers. As long as they are an exact multiple of the block size this is fine
and the kernel doesn't complain. This also enables O_SYNC to prevent any buffering on the guest.
This should help to push out data quicker and prevent buffer bloat. The host has its own cache
anyways.

Test Plan:
No change in functionality, I observe more predictable performance (previously
I sometimes had stalls where the initialization would take > 60s).

X-Origin-Diff: phab/D599
GitOrigin-RevId: 19554fd9e6d709bde738d01a0d2de190c441640e
1 file changed
tree: 9cf2ea8bcfb5ee1170f4055979a69a0cd4266ab9
  1. build/
  2. core/
  3. scripts/
  4. third_party/
  5. .bazelignore
  6. .bazelrc
  7. BUILD
  8. nogo_config.json
  9. README.md
  10. WORKSPACE
README.md

Nexantic monorepo

This is the monorepo storing all of nexantic's internal projects and libraries.

Environment

We assume a Fedora host system provisioned using rW, and IntelliJ as the IDE.

For better reproducibility, all builds are executed in containers.

Usage

Spinning up: scripts/create_container.sh

Spinning down: scripts/destroy_container.sh

Running commands: scripts/run_in_container.sh <...>

Using bazel using a wrapper script: scripts/bin/bazel <...> (add to your local $PATH for convenience)

Run a single node cluster

Launch the node:

bazel run //:launch

Run a kubectl command:

bazel run //core/cmd/dbg -- kubectl describe

IntelliJ

This repository is compatible with the IntelliJ Bazel plugin. All commands run inside the container, and necessary paths are mapped into the container.

We check the entire .ijwb project directory into the repository, which requires everyone to use the latest version of both IntelliJ and the Bazel plugin, but eliminates manual setup steps.

The following steps are necessary:

  • Install Google's official Bazel plugin in IntelliJ.

  • Add the absolute path to your ~/.cache/bazel-nxt folder to your idea64.vmoptions (Help → Edit Custom VM Options) and restart IntelliJ:

    -Dbazel.bep.path=/home/leopold/.cache/bazel-nxt

  • Set "Bazel Binary Location" in Other Settings → Bazel Settings to the absolute path of scripts/bin/bazel. This is a wrapper that will execute Bazel inside the container.

  • Open the .ijwb folder as IntelliJ project.

  • Disable Vgo support for the project.

  • Run a non-incremental sync in IntelliJ

The plugin will automatically resolve paths for generated files.

If you do not use IntelliJ, you need to use the scripts/bazel_copy_generated_for_ide.sh script to copy files locally.