-
Notifications
You must be signed in to change notification settings - Fork 1
Commit
This commit does not belong to any branch on this repository, and may belong to a fork outside of the repository.
feat: add trait for cache stats and atomic stats (#5)
- Loading branch information
Showing
4 changed files
with
179 additions
and
22 deletions.
There are no files selected for viewing
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
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
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
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
| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,124 @@ | ||
| //! Cache stats | ||
| use std::{ | ||
| fmt::Debug, | ||
| sync::atomic::{AtomicU64, Ordering}, | ||
| }; | ||
|
|
||
| use log::warn; | ||
|
|
||
| pub trait CacheReadStats: Sync + Send + Debug { | ||
| /// Total reads on the cache. | ||
| fn total_reads(&self) -> u64; | ||
|
|
||
| /// Total hits | ||
| fn total_misses(&self) -> u64; | ||
|
|
||
| /// Increase total reads by 1. | ||
| fn inc_total_reads(&self); | ||
|
|
||
| /// Increase total hits by 1. | ||
| fn inc_total_misses(&self); | ||
| } | ||
|
|
||
| pub trait CacheCapacityStats { | ||
| fn max_capacity(&self) -> u64; | ||
|
|
||
| fn set_max_capacity(&self, val: u64); | ||
|
|
||
| fn usage(&self) -> u64; | ||
|
|
||
| fn set_usage(&self, val: u64); | ||
|
|
||
| fn inc_usage(&self, val: u64); | ||
|
|
||
| fn sub_usage(&self, val: u64); | ||
| } | ||
|
|
||
| pub trait CacheStats: CacheCapacityStats + CacheReadStats {} | ||
|
|
||
| #[derive(Debug)] | ||
| pub struct AtomicIntCacheStats { | ||
| total_reads: AtomicU64, | ||
| total_misses: AtomicU64, | ||
| max_capacity: AtomicU64, | ||
| capacity_usage: AtomicU64, | ||
| } | ||
|
|
||
| impl AtomicIntCacheStats { | ||
| pub fn new() -> Self { | ||
| Self { | ||
| total_misses: AtomicU64::new(0), | ||
| total_reads: AtomicU64::new(0), | ||
| max_capacity: AtomicU64::new(0), | ||
| capacity_usage: AtomicU64::new(0), | ||
| } | ||
| } | ||
| } | ||
|
|
||
| impl Default for AtomicIntCacheStats { | ||
| fn default() -> Self { | ||
| Self::new() | ||
| } | ||
| } | ||
|
|
||
| impl CacheReadStats for AtomicIntCacheStats { | ||
| fn total_misses(&self) -> u64 { | ||
| self.total_misses.load(Ordering::Acquire) | ||
| } | ||
|
|
||
| fn total_reads(&self) -> u64 { | ||
| self.total_reads.load(Ordering::Acquire) | ||
| } | ||
|
|
||
| fn inc_total_reads(&self) { | ||
| self.total_reads.fetch_add(1, Ordering::Relaxed); | ||
| } | ||
|
|
||
| fn inc_total_misses(&self) { | ||
| self.total_misses.fetch_add(1, Ordering::Relaxed); | ||
| } | ||
| } | ||
|
|
||
| impl CacheCapacityStats for AtomicIntCacheStats { | ||
| fn max_capacity(&self) -> u64 { | ||
| self.max_capacity.load(Ordering::Acquire) | ||
| } | ||
|
|
||
| fn set_max_capacity(&self, val: u64) { | ||
| self.max_capacity.store(val, Ordering::Relaxed); | ||
| } | ||
|
|
||
| fn usage(&self) -> u64 { | ||
| self.capacity_usage.load(Ordering::Acquire) | ||
| } | ||
|
|
||
| fn set_usage(&self, val: u64) { | ||
| self.capacity_usage.store(val, Ordering::Relaxed); | ||
| } | ||
|
|
||
| fn inc_usage(&self, val: u64) { | ||
| self.capacity_usage.fetch_add(val, Ordering::Relaxed); | ||
| } | ||
|
|
||
| fn sub_usage(&self, val: u64) { | ||
| let res = | ||
| self.capacity_usage | ||
| .fetch_update(Ordering::Acquire, Ordering::Relaxed, |current| { | ||
| if current < val { | ||
| warn!( | ||
| "cannot decrement cache usage. current val = {:?} and decrement = {:?}", | ||
| current, val | ||
| ); | ||
| None | ||
| } else { | ||
| Some(current - val) | ||
| } | ||
| }); | ||
| if let Err(e) = res { | ||
| warn!("error setting cache usage: {:?}", e); | ||
| } | ||
| } | ||
| } | ||
|
|
||
| impl CacheStats for AtomicIntCacheStats {} |