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Refactor PVF preparation memory stats (#6693)

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* Refactor PVF preparation memory stats

The original purpose of this change was to gate metrics that are unsupported by
some systems behind conditional compilation directives (#[cfg]); see
https://github.com/paritytech/polkadot/pull/6675#discussion_r1099996209.

Then I started doing some random cleanups and simplifications and got a bit
carried away. 🙈 The code should be overall tidier than before.

Changes:
- Don't register unsupported metrics (e.g. `max_rss` on non-Linux systems)
- Introduce `PrepareStats` struct as an abstraction over the `Ok` values of
  `PrepareResult`. It is cleaner, and can be easily modified in the future.
- Other small changes

* Minor fixes to comments

* Fix compile errors

* Try to fix some Linux errors

* Mep

* Fix candidate-validation tests

* Update docstring
This commit is contained in:
Marcin S
2023-02-14 16:48:57 +01:00
committed by GitHub
parent 9c35763017
commit fd70d01274
11 changed files with 158 additions and 147 deletions
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polkadot/node/core/candidate-validation/src/lib.rs
+4 -3
View File
@@ -24,7 +24,8 @@
#![warn(missing_docs)]
use polkadot_node_core_pvf::{
InvalidCandidate as WasmInvalidCandidate, PrepareError, Pvf, ValidationError, ValidationHost,
InvalidCandidate as WasmInvalidCandidate, PrepareError, PrepareStats, Pvf, ValidationError,
ValidationHost,
};
use polkadot_node_primitives::{
BlockData, InvalidCandidate, PoV, ValidationResult, POV_BOMB_LIMIT, VALIDATION_CODE_BOMB_LIMIT,
@@ -654,7 +655,7 @@ trait ValidationBackend {
validation_result
}
async fn precheck_pvf(&mut self, pvf: Pvf) -> Result<Duration, PrepareError>;
async fn precheck_pvf(&mut self, pvf: Pvf) -> Result<PrepareStats, PrepareError>;
}
#[async_trait]
@@ -680,7 +681,7 @@ impl ValidationBackend for ValidationHost {
.map_err(|_| ValidationError::InternalError("validation was cancelled".into()))?
}
async fn precheck_pvf(&mut self, pvf: Pvf) -> Result<Duration, PrepareError> {
async fn precheck_pvf(&mut self, pvf: Pvf) -> Result<PrepareStats, PrepareError> {
let (tx, rx) = oneshot::channel();
if let Err(err) = self.precheck_pvf(pvf, tx).await {
// Return an IO error if there was an error communicating with the host.