metrics: metrify cache slot reads

[carneiro-cw]

PR Type

Enhancement

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Description

• Introduced a new label constant CACHE for better categorization of cache-related operations
• Implemented metrics for cache slot reads using the timed function to measure performance
• Added metrics increment for storage read slot operations, specifically for cache reads
• Enhanced the read_slot function to provide more detailed performance insights
• Improved observability of the cache system in the Stratus storage implementation

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Changes walkthrough 📝

	Relevant files
Enhancement	stratus_storage.rs Add metrics for cache slot reads                                                  src/eth/storage/stratus_storage.rs Added a new label constant CACHE for cache-related operations Implemented metrics for cache slot reads using the timed function Incremented storage read slot metrics with cache-specific information +4/-1

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[github-actions]

PR Reviewer Guide 🔍

Here are some key observations to aid the review process:

⏱️ Estimated effort to review: 2 🔵🔵⚪⚪⚪

🧪 No relevant tests

🔒 No security concerns identified

⚡ Recommended focus areas for review Performance Monitoring The PR introduces metrics for cache slot reads, which is good for performance monitoring. However, it's important to ensure that the added instrumentation doesn't introduce significant overhead, especially in hot paths. Error Handling The PR modifies the cache read logic, but it's not clear how errors are handled if the timed function fails. Consider reviewing the error handling strategy for this operation.

[github-actions]

PR Code Suggestions ✨

Explore these optional code suggestions:

Category	Suggestion	Score
Possible issue	Prevent early return from function to ensure all necessary logic is executed The return statement inside the if let block will cause an early return from the entire read_slot function, potentially bypassing important logic. Consider breaking the label and returning the slot at the end of the function instead. src/eth/storage/stratus_storage.rs [204-208] if let Some(slot) = timed(|| self.cache.get_slot(address, index)).with(|m| { metrics::inc_storage_read_slot(m.elapsed, label::CACHE, point_in_time, true); }) { - return Ok(slot); + break 'query slot; }; Suggestion importance[1-10]: 8 Why: The suggestion correctly identifies a potential issue where an early return could bypass important logic. Changing to 'break' with the label ensures all necessary code is executed, improving the function's reliability and correctness.	8

[gabriel-aranha-cw]

Final benchmark:
Run ID: bench-900199182

Git Info:

• Branch: main
• Commit: a50187d
• PR: metrics: metrify cache slot reads #1912

Configuration:

• Target Account Strategy: Default

RPS Stats: Max: 1122.00, Min: 636.00, Avg: 988.44, StdDev: 60.09
TPS Stats: Max: 1136.00, Min: 819.00, Avg: 958.64, StdDev: 64.01

Plot: View Plot