Sync internal commits 2024-09-06 #75
Open
Conversation
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
If we have a cache miss, any meta in this object is invalid. Unset it so that we don't use it later.
Includes-commit: 0560e0f Replicated-from: cloudflare#356
Co-authored-by: Derek Argueta <[email protected]>
Includes-commit: 9a934bc Replicated-from: cloudflare#360
This has the effect of reducing a warning log since we are not leaving the lock dangling for the next reader.
This changes the memory ordering for the lock status load to `SeqCst` from
`Relaxed` to eliminate a potential source of panics.
Panics had the frames:
```
pingora_proxy::proxy_cache::<T>::handle_lock_status (proxy_cache.rs:748)
pingora_proxy::proxy_cache::<T>::proxy_cache::{{closure}} (proxy_cache.rs:211)
pingora_proxy::HttpProxy<T>::process_request::{{closure}} (lib.rs:509)
pingora_proxy::HttpProxy<T>::process_new_http::{{closure}} (lib.rs:727)
```
which showed we were checking on the status of the lock, after waiting on it,
and still seeing its status as waiting. The status is returned by value, so this
is not a time-of-check to time-of-use problem, this is an inconsistency in how
the lock status is managed. The change in memory order is mostly for the sake of
this programmer's attempts to understand what is happening.
This also completes a couple of TODOs to limit the wait period as well as tag
the span with the lock status.
CodSpeed Performance ReportMerging #75 will not alter performanceComparing Summary
|
coco-speed
force-pushed
the
main
branch
2 times, most recently
from
d94ad0d to
4b82093
Compare
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
Add this suggestion to a batch that can be applied as a single commit.
This suggestion is invalid because no changes were made to the code.
Suggestions cannot be applied while the pull request is closed.
Suggestions cannot be applied while viewing a subset of changes.
Only one suggestion per line can be applied in a batch.
Add this suggestion to a batch that can be applied as a single commit.
Applying suggestions on deleted lines is not supported.
You must change the existing code in this line in order to create a valid suggestion.
Outdated suggestions cannot be applied.
This suggestion has been applied or marked resolved.
Suggestions cannot be applied from pending reviews.
Suggestions cannot be applied on multi-line comments.
Suggestions cannot be applied while the pull request is queued to merge.
Suggestion cannot be applied right now. Please check back later.
This pull request was created automatically by CodSpeed to track performance changes of the pull request cloudflare/pingora#375.
The original branch is upstream/ewang/2024-09-06