optirs_gpu/memory/management/
mod.rs

1// GPU memory management modules
2//
3// This module provides advanced GPU memory management capabilities including
4// garbage collection, prefetching, eviction policies, and defragmentation.
5
6pub mod defragmentation;
7pub mod eviction_policies;
8pub mod garbage_collection;
9pub mod prefetching;
10
11use std::collections::HashMap;
12use std::ffi::c_void;
13use std::time::{Duration, Instant};
14
15use crate::memory::management::eviction_policies::EvictionConfig;
16
17pub use garbage_collection::{
18    GCConfig, GCStats, GarbageCollectionEngine, GarbageCollector, GenerationalCollector,
19    IncrementalCollector, MarkSweepCollector, ReferenceTracker,
20};
21
22pub use prefetching::{
23    AccessHistoryTracker, PrefetchCache, PrefetchConfig, PrefetchStrategy, PrefetchingEngine,
24    SequentialPrefetcher, StridePrefetcher,
25};
26
27pub use eviction_policies::{
28    ARCPolicy, ClockPolicy, EvictionEngine, EvictionPerformanceMonitor, EvictionPolicy, FIFOPolicy,
29    LFUPolicy, LRUPolicy, MemoryRegion, WorkloadAwarePolicy,
30};
31
32pub use defragmentation::{
33    CompactionAlgorithm, CompactionStrategy, DefragConfig, DefragError, DefragmentationEngine,
34    SlidingCompactionStrategy, ThreadSafeDefragmentationEngine, TwoPointerCompactionStrategy,
35};
36
37/// Unified memory management configuration
38#[derive(Debug, Clone)]
39pub struct MemoryManagementConfig {
40    /// Garbage collection configuration
41    pub gc_config: GCConfig,
42    /// Prefetching configuration  
43    pub prefetch_config: PrefetchConfig,
44    /// Defragmentation configuration
45    pub defrag_config: DefragConfig,
46    /// Enable background management
47    pub enable_background_management: bool,
48    /// Management thread count
49    pub management_threads: usize,
50    /// Memory pressure threshold
51    pub memory_pressure_threshold: f64,
52    /// Performance monitoring interval
53    pub monitoring_interval: Duration,
54}
55
56impl Default for MemoryManagementConfig {
57    fn default() -> Self {
58        Self {
59            gc_config: GCConfig::default(),
60            prefetch_config: PrefetchConfig::default(),
61            defrag_config: DefragConfig::default(),
62            enable_background_management: true,
63            management_threads: 2,
64            memory_pressure_threshold: 0.8,
65            monitoring_interval: Duration::from_millis(100),
66        }
67    }
68}
69
70/// Integrated memory management system
71pub struct IntegratedMemoryManager {
72    /// Garbage collection engine
73    gc_engine: GarbageCollectionEngine,
74    /// Prefetching engine
75    prefetch_engine: PrefetchingEngine,
76    /// Eviction engine
77    eviction_engine: EvictionEngine,
78    /// Defragmentation engine
79    defrag_engine: DefragmentationEngine,
80    /// Configuration
81    config: MemoryManagementConfig,
82    /// Management statistics
83    stats: ManagementStats,
84    /// Background management enabled
85    background_enabled: bool,
86}
87
88/// Memory management statistics
89#[derive(Debug, Clone, Default)]
90pub struct ManagementStats {
91    pub gc_collections: u64,
92    pub objects_collected: u64,
93    pub bytes_freed_by_gc: u64,
94    pub prefetch_requests: u64,
95    pub prefetch_hits: u64,
96    pub prefetch_accuracy: f64,
97    pub evictions_performed: u64,
98    pub bytes_evicted: u64,
99    pub defragmentation_cycles: u64,
100    pub fragmentation_reduced: usize,
101    pub total_management_time: Duration,
102    pub memory_pressure_events: u64,
103}
104
105impl IntegratedMemoryManager {
106    /// Create new integrated memory manager
107    pub fn new(config: MemoryManagementConfig) -> Self {
108        let gc_engine = GarbageCollectionEngine::new(config.gc_config.clone());
109        let prefetch_engine = PrefetchingEngine::new(config.prefetch_config.clone());
110        let eviction_engine = EvictionEngine::new(EvictionConfig::default());
111        let defrag_engine = DefragmentationEngine::new(config.defrag_config.clone());
112
113        Self {
114            gc_engine,
115            prefetch_engine,
116            eviction_engine,
117            defrag_engine,
118            config,
119            stats: ManagementStats::default(),
120            background_enabled: false,
121        }
122    }
123
124    /// Start background memory management
125    pub fn start_background_management(&mut self) -> Result<(), MemoryManagementError> {
126        if !self.config.enable_background_management {
127            return Err(MemoryManagementError::BackgroundManagementDisabled);
128        }
129
130        self.background_enabled = true;
131        Ok(())
132    }
133
134    /// Stop background memory management
135    pub fn stop_background_management(&mut self) {
136        self.background_enabled = false;
137    }
138
139    /// Run garbage collection
140    pub fn run_garbage_collection(
141        &mut self,
142        memory_regions: &HashMap<usize, MemoryRegion>,
143    ) -> Result<usize, MemoryManagementError> {
144        let start_time = Instant::now();
145
146        let gc_results = self
147            .gc_engine
148            .collect()
149            .map_err(|e| MemoryManagementError::GarbageCollectionFailed(format!("{:?}", e)))?;
150        let bytes_freed: usize = gc_results.iter().map(|r| r.bytes_collected).sum();
151
152        self.stats.gc_collections += 1;
153        self.stats.bytes_freed_by_gc += bytes_freed as u64;
154        self.stats.total_management_time += start_time.elapsed();
155
156        Ok(bytes_freed)
157    }
158
159    /// Perform prefetch operation
160    pub fn prefetch(
161        &mut self,
162        address: *mut c_void,
163        size: usize,
164        access_pattern: Option<&str>,
165    ) -> Result<bool, MemoryManagementError> {
166        let start_time = Instant::now();
167
168        // TODO: Implement prefetch method in PrefetchingEngine
169        let prefetched = false; // Placeholder until method is implemented
170
171        self.stats.prefetch_requests += 1;
172        if prefetched {
173            self.stats.prefetch_hits += 1;
174        }
175
176        self.stats.prefetch_accuracy =
177            self.stats.prefetch_hits as f64 / self.stats.prefetch_requests as f64;
178        self.stats.total_management_time += start_time.elapsed();
179
180        Ok(prefetched)
181    }
182
183    /// Perform memory eviction
184    pub fn evict_memory(&mut self, target_bytes: usize) -> Result<usize, MemoryManagementError> {
185        let start_time = Instant::now();
186
187        // TODO: Implement evict_memory method in EvictionEngine
188        let bytes_evicted = 0; // Placeholder until method is implemented
189
190        self.stats.evictions_performed += 1;
191        self.stats.bytes_evicted += bytes_evicted as u64;
192        self.stats.total_management_time += start_time.elapsed();
193
194        Ok(bytes_evicted)
195    }
196
197    /// Run defragmentation
198    pub fn defragment(
199        &mut self,
200        memory_regions: &HashMap<usize, MemoryRegion>,
201    ) -> Result<usize, MemoryManagementError> {
202        let start_time = Instant::now();
203
204        let compaction_result = self
205            .defrag_engine
206            .defragment()
207            .map_err(|e| MemoryManagementError::DefragmentationFailed(format!("{:?}", e)))?;
208
209        let fragmentation_reduced = compaction_result.bytes_moved;
210
211        self.stats.defragmentation_cycles += 1;
212        self.stats.fragmentation_reduced += fragmentation_reduced;
213        self.stats.total_management_time += start_time.elapsed();
214
215        Ok(fragmentation_reduced)
216    }
217
218    /// Check memory pressure and trigger appropriate management
219    pub fn handle_memory_pressure(
220        &mut self,
221        memory_usage_ratio: f64,
222        memory_regions: &HashMap<usize, MemoryRegion>,
223    ) -> Result<(), MemoryManagementError> {
224        if memory_usage_ratio > self.config.memory_pressure_threshold {
225            self.stats.memory_pressure_events += 1;
226
227            // Try garbage collection first
228            let _ = self.run_garbage_collection(memory_regions)?;
229
230            // If still under pressure, try eviction
231            if memory_usage_ratio > 0.9 {
232                let target_eviction =
233                    (memory_usage_ratio - self.config.memory_pressure_threshold) * 1_000_000.0; // Estimate bytes
234                let _ = self.evict_memory(target_eviction as usize)?;
235            }
236
237            // If severely fragmented, run defragmentation
238            if memory_usage_ratio > 0.95 {
239                let _ = self.defragment(memory_regions)?;
240            }
241        }
242
243        Ok(())
244    }
245
246    /// Update access patterns for adaptive management
247    pub fn update_access_pattern(
248        &mut self,
249        address: *mut c_void,
250        size: usize,
251        access_type: AccessType,
252    ) -> Result<(), MemoryManagementError> {
253        // TODO: Implement update_access_history method in PrefetchingEngine
254        // self.prefetch_engine.update_access_history(address, size, access_type.clone());
255
256        // TODO: Implement record_access method in EvictionEngine
257        // self.eviction_engine.record_access(address, size, access_type);
258
259        Ok(())
260    }
261
262    /// Get management statistics
263    pub fn get_stats(&self) -> &ManagementStats {
264        &self.stats
265    }
266
267    /// Get garbage collection stats
268    pub fn get_gc_stats(&self) -> GCStats {
269        self.gc_engine.get_stats().clone()
270    }
271
272    /// Get prefetch performance
273    pub fn get_prefetch_performance(&self) -> PrefetchPerformance {
274        PrefetchPerformance {
275            requests: self.stats.prefetch_requests,
276            hits: self.stats.prefetch_hits,
277            accuracy: self.stats.prefetch_accuracy,
278            cache_size: 0, // TODO: Implement get_cache_size method
279        }
280    }
281
282    /// Optimize management policies based on workload
283    pub fn optimize_policies(&mut self) -> Result<(), MemoryManagementError> {
284        // TODO: Implement analyze_access_patterns and policy setting methods
285        // let access_patterns = self.prefetch_engine.analyze_access_patterns();
286        // self.gc_engine.set_preferred_strategy("generational");
287        // self.eviction_engine.set_active_policy("lru");
288
289        Ok(())
290    }
291}
292
293/// Memory access types for pattern tracking
294#[derive(Debug, Clone)]
295pub enum AccessType {
296    Read,
297    Write,
298    ReadWrite,
299    Sequential,
300    Random,
301}
302
303/// Prefetch performance metrics
304#[derive(Debug, Clone)]
305pub struct PrefetchPerformance {
306    pub requests: u64,
307    pub hits: u64,
308    pub accuracy: f64,
309    pub cache_size: usize,
310}
311
312/// Access pattern analysis
313#[derive(Debug, Clone)]
314pub struct AccessPatterns {
315    pub temporal_locality: f64,
316    pub spatial_locality: f64,
317    pub frequency_based: bool,
318    pub stride_patterns: Vec<i64>,
319}
320
321/// Memory management errors
322#[derive(Debug, Clone)]
323pub enum MemoryManagementError {
324    GarbageCollectionFailed(String),
325    PrefetchFailed(String),
326    EvictionFailed(String),
327    DefragmentationFailed(String),
328    BackgroundManagementDisabled,
329    InvalidConfiguration(String),
330    InternalError(String),
331}
332
333impl std::fmt::Display for MemoryManagementError {
334    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
335        match self {
336            MemoryManagementError::GarbageCollectionFailed(msg) => {
337                write!(f, "Garbage collection failed: {}", msg)
338            }
339            MemoryManagementError::PrefetchFailed(msg) => write!(f, "Prefetch failed: {}", msg),
340            MemoryManagementError::EvictionFailed(msg) => write!(f, "Eviction failed: {}", msg),
341            MemoryManagementError::DefragmentationFailed(msg) => {
342                write!(f, "Defragmentation failed: {}", msg)
343            }
344            MemoryManagementError::BackgroundManagementDisabled => {
345                write!(f, "Background management is disabled")
346            }
347            MemoryManagementError::InvalidConfiguration(msg) => {
348                write!(f, "Invalid configuration: {}", msg)
349            }
350            MemoryManagementError::InternalError(msg) => write!(f, "Internal error: {}", msg),
351        }
352    }
353}
354
355impl std::error::Error for MemoryManagementError {}
356
357#[cfg(test)]
358mod tests {
359    use super::*;
360
361    #[test]
362    fn test_integrated_manager_creation() {
363        let config = MemoryManagementConfig::default();
364        let manager = IntegratedMemoryManager::new(config);
365        assert!(!manager.background_enabled);
366    }
367
368    #[test]
369    fn test_background_management() {
370        let config = MemoryManagementConfig::default();
371        let mut manager = IntegratedMemoryManager::new(config);
372        let result = manager.start_background_management();
373        assert!(result.is_ok());
374        assert!(manager.background_enabled);
375    }
376
377    #[test]
378    fn test_stats_initialization() {
379        let config = MemoryManagementConfig::default();
380        let manager = IntegratedMemoryManager::new(config);
381        let stats = manager.get_stats();
382        assert_eq!(stats.gc_collections, 0);
383        assert_eq!(stats.prefetch_requests, 0);
384    }
385}
optirs_gpu/memory/management/mod.rs

optirs_gpu/memory/management/
mod.rs
