scirs2_core/advanced_jit_compilation_impl/
cache.rs

1//! Kernel cache for compiled functions
2
3use crate::advanced_jit_compilation::config::{CacheConfig, EvictionPolicy, JitCompilerConfig};
4use crate::advanced_jit_compilation::llvm_engine::CompiledModule;
5use crate::error::{CoreError, CoreResult};
6#[cfg(feature = "serialization")]
7use serde::{Deserialize, Serialize};
8use std::collections::HashMap;
9use std::time::{Duration, Instant};
10
11/// Kernel cache for compiled functions
12#[derive(Debug)]
13pub struct KernelCache {
14    /// Cached kernels
15    kernels: HashMap<String, CachedKernel>,
16    /// Cache statistics
17    pub stats: CacheStatistics,
18    /// Cache configuration
19    #[allow(dead_code)]
20    config: CacheConfig,
21    /// LRU eviction list
22    #[allow(dead_code)]
23    lru_list: Vec<String>,
24}
25
26/// Cached kernel representation
27#[derive(Debug, Clone)]
28pub struct CachedKernel {
29    /// Kernel identifier
30    pub id: String,
31    /// Compiled function pointer
32    pub functionptr: usize,
33    /// Kernel metadata
34    pub metadata: KernelMetadata,
35    /// Performance metrics
36    pub performance: KernelPerformance,
37    /// Last access time
38    pub last_accessed: Instant,
39    /// Access count
40    pub access_count: u64,
41}
42
43/// Kernel metadata
44#[cfg_attr(feature = "serialization", derive(Serialize, Deserialize))]
45#[derive(Debug, Clone)]
46pub struct KernelMetadata {
47    /// Kernel name
48    pub name: String,
49    /// Input types
50    pub input_types: Vec<String>,
51    /// Output type
52    pub output_type: String,
53    /// Specialization parameters
54    pub specialization_params: HashMap<String, String>,
55    /// Compilation flags
56    pub compilation_flags: Vec<String>,
57    /// Source code fingerprint
58    pub source_fingerprint: u64,
59}
60
61/// Kernel performance metrics
62#[derive(Debug, Clone)]
63pub struct KernelPerformance {
64    /// Execution time statistics
65    pub execution_times: Vec<Duration>,
66    /// Memory access patterns
67    pub memory_access_patterns: MemoryAccessPattern,
68    /// Vectorization utilization
69    pub vectorization_utilization: f64,
70    /// Branch prediction accuracy
71    pub branch_prediction_accuracy: f64,
72    /// Cache hit rates
73    pub cache_hit_rates: CacheHitRates,
74}
75
76/// Memory access patterns
77#[derive(Debug, Clone)]
78pub struct MemoryAccessPattern {
79    /// Sequential access percentage
80    pub sequential_access: f64,
81    /// Random access percentage
82    pub random_access: f64,
83    /// Stride access percentage
84    pub stride_access: f64,
85    /// Prefetch efficiency
86    pub prefetch_efficiency: f64,
87}
88
89/// Cache hit rates
90#[derive(Debug, Clone)]
91pub struct CacheHitRates {
92    /// L1 cache hit rate
93    pub l1_hit_rate: f64,
94    /// L2 cache hit rate
95    pub l2_hit_rate: f64,
96    /// L3 cache hit rate
97    pub l3_hit_rate: f64,
98    /// TLB hit rate
99    pub tlb_hit_rate: f64,
100}
101
102/// Cache statistics
103#[derive(Debug, Clone)]
104pub struct CacheStatistics {
105    /// Total cache hits
106    pub hits: u64,
107    /// Total cache misses
108    pub misses: u64,
109    /// Cache evictions
110    pub evictions: u64,
111    /// Current cache size
112    pub current_size_bytes: usize,
113    /// Maximum cache size
114    pub maxsize_bytes: usize,
115}
116
117/// Compiled kernel representation
118#[derive(Debug)]
119pub struct CompiledKernel {
120    /// Kernel name
121    pub name: String,
122    /// Compiled module
123    pub compiled_module: CompiledModule,
124    /// Kernel metadata
125    pub metadata: KernelMetadata,
126    /// Performance metrics
127    pub performance: KernelPerformance,
128    /// Creation timestamp
129    pub created_at: Instant,
130}
131
132impl Default for KernelPerformance {
133    fn default() -> Self {
134        Self {
135            execution_times: Vec::new(),
136            memory_access_patterns: MemoryAccessPattern {
137                sequential_access: 0.8,
138                random_access: 0.1,
139                stride_access: 0.1,
140                prefetch_efficiency: 0.7,
141            },
142            vectorization_utilization: 0.6,
143            branch_prediction_accuracy: 0.9,
144            cache_hit_rates: CacheHitRates {
145                l1_hit_rate: 0.95,
146                l2_hit_rate: 0.85,
147                l3_hit_rate: 0.75,
148                tlb_hit_rate: 0.98,
149            },
150        }
151    }
152}
153
154impl KernelCache {
155    pub fn new(config: &JitCompilerConfig) -> CoreResult<Self> {
156        Ok(Self {
157            kernels: HashMap::new(),
158            stats: CacheStatistics {
159                hits: 0,
160                misses: 0,
161                evictions: 0,
162                current_size_bytes: 0,
163                maxsize_bytes: 512 * 1024 * 1024, // 512MB
164            },
165            config: CacheConfig {
166                maxsize_mb: 512,
167                eviction_policy: EvictionPolicy::LRU,
168                enable_cache_warming: true,
169                enable_persistence: false,
170                persistence_dir: None,
171            },
172            lru_list: Vec::new(),
173        })
174    }
175
176    pub fn get(&self, name: &str) -> Option<&CachedKernel> {
177        self.kernels.get(name)
178    }
179
180    pub fn insert(&mut self, kernel: &CompiledKernel) -> CoreResult<()> {
181        // Simplified implementation
182        Ok(())
183    }
184
185    pub fn get_statistics(&self) -> CacheStatistics {
186        self.stats.clone()
187    }
188}
189
190impl CachedKernel {
191    pub fn is_valid_for_source(&self, source: &str) -> bool {
192        // Simplified implementation
193        true
194    }
195}
196
197impl CompiledKernel {
198    /// Get function pointer for execution
199    pub fn get_function_pointer(&self) -> CoreResult<usize> {
200        self.compiled_module
201            .function_pointers
202            .get("main")
203            .copied()
204            .ok_or_else(|| {
205                CoreError::InvalidArgument(crate::error::ErrorContext::new(
206                    "Main function not found".to_string(),
207                ))
208            })
209    }
210}
scirs2_core/advanced_jit_compilation_impl/cache.rs

scirs2_core/advanced_jit_compilation_impl/
cache.rs
