Changeset f6fdfb14
- Timestamp:
- May 3, 2021, 4:31:15 PM (2 years ago)
- Branches:
- ADT, arm-eh, enum, forall-pointer-decay, jacob/cs343-translation, master, new-ast-unique-expr, pthread-emulation, qualifiedEnum
- Children:
- eeb9f9f
- Parents:
- f04a3df6
- Location:
- libcfa/src/concurrency
- Files:
-
- 5 edited
Legend:
- Unmodified
- Added
- Removed
-
libcfa/src/concurrency/invoke.h
rf04a3df6 rf6fdfb14 146 146 struct __thread_desc_link { 147 147 struct $thread * next; 148 struct $thread * prev;149 148 volatile unsigned long long ts; 150 unsigned preferred;151 149 }; 152 150 -
libcfa/src/concurrency/kernel/startup.cfa
rf04a3df6 rf6fdfb14 461 461 self_mon_p = &self_mon; 462 462 link.next = 0p; 463 link.prev = 0p;464 463 link.ts = 0; 465 464 link.preferred = -1u; -
libcfa/src/concurrency/ready_queue.cfa
rf04a3df6 rf6fdfb14 255 255 const bool external = (!kernelTLS().this_processor) || (cltr != kernelTLS().this_processor->cltr); 256 256 /* paranoid */ verify(external || kernelTLS().this_processor->rdq.id < lanes.count ); 257 258 // write timestamp259 #if !defined(USE_NEW_SUBQUEUE)260 thrd->link.ts = rdtscl();261 #endif262 257 263 258 bool local; -
libcfa/src/concurrency/ready_subqueue.hfa
rf04a3df6 rf6fdfb14 5 5 #include "containers/queueLockFree.hfa" 6 6 7 // #define USE_NEW_SUBQUEUE 8 #if defined(USE_NEW_SUBQUEUE) 9 // Intrusives lanes which are used by the relaxed ready queue 10 struct __attribute__((aligned(128))) __intrusive_lane_t { 11 struct $thread * prev; 7 // Intrusives lanes which are used by the relaxed ready queue 8 struct __attribute__((aligned(128))) __intrusive_lane_t { 9 struct $thread * prev; 12 10 13 14 11 // spin lock protecting the queue 12 volatile bool lock; 15 13 16 17 14 __thread_desc_link anchor; 15 }; 18 16 19 // Get the head pointer (one before the first element) from the anchor 20 static inline $thread * mock_head(const __intrusive_lane_t & this) { 21 $thread * rhead = ($thread *)( 22 (uintptr_t)( &this.anchor ) - __builtin_offsetof( $thread, link ) 23 ); 24 return rhead; 17 // Get the head pointer (one before the first element) from the anchor 18 static inline $thread * mock_head(const __intrusive_lane_t & this) { 19 $thread * rhead = ($thread *)( 20 (uintptr_t)( &this.anchor ) - __builtin_offsetof( $thread, link ) 21 ); 22 return rhead; 23 } 24 25 // Ctor 26 void ?{}( __intrusive_lane_t & this ) { 27 this.lock = false; 28 this.prev = mock_head(this); 29 this.anchor.next = 0p; 30 this.anchor.ts = 0; 31 32 // We add a boat-load of assertions here because the anchor code is very fragile 33 /* paranoid */ verify( ((uintptr_t)( mock_head(this) ) + offsetof( $thread, link )) == (uintptr_t)(&this.anchor) ); 34 /* paranoid */ verify( &mock_head(this)->link.next == &this.anchor.next ); 35 /* paranoid */ verify( &mock_head(this)->link.ts == &this.anchor.ts ); 36 /* paranoid */ verify( mock_head(this)->link.next == 0p ); 37 /* paranoid */ verify( mock_head(this)->link.ts == 0 ); 38 /* paranoid */ verify( mock_head(this) == this.prev ); 39 /* paranoid */ verify( __alignof__(__intrusive_lane_t) == 128 ); 40 /* paranoid */ verify( __alignof__(this) == 128 ); 41 /* paranoid */ verifyf( ((intptr_t)(&this) % 128) == 0, "Expected address to be aligned %p %% 128 == %zd", &this, ((intptr_t)(&this) % 128) ); 42 } 43 44 // Dtor is trivial 45 void ^?{}( __intrusive_lane_t & this ) { 46 // Make sure the list is empty 47 /* paranoid */ verify( this.anchor.next == 0p ); 48 /* paranoid */ verify( this.anchor.ts == 0 ); 49 /* paranoid */ verify( mock_head(this) == this.prev ); 50 } 51 52 // Push a thread onto this lane 53 // returns true of lane was empty before push, false otherwise 54 void push( __intrusive_lane_t & this, $thread * node ) { 55 /* paranoid */ verify( node->link.next == 0p ); 56 /* paranoid */ verify( node->link.ts == 0 ); 57 /* paranoid */ verify( this.prev->link.next == 0p ); 58 /* paranoid */ verify( this.prev->link.ts == 0 ); 59 if( this.anchor.next == 0p ) { 60 /* paranoid */ verify( this.anchor.next == 0p ); 61 /* paranoid */ verify( this.anchor.ts == 0 ); 62 /* paranoid */ verify( this.prev == mock_head( this ) ); 63 } else { 64 /* paranoid */ verify( this.anchor.next != 0p ); 65 /* paranoid */ verify( this.anchor.ts != 0 ); 66 /* paranoid */ verify( this.prev != mock_head( this ) ); 25 67 } 26 68 27 // Ctor 28 void ?{}( __intrusive_lane_t & this ) { 29 this.lock = false; 30 this.prev = mock_head(this); 31 this.anchor.next = 0p; 32 this.anchor.ts = 0; 69 // Get the relevant nodes locally 70 this.prev->link.next = node; 71 this.prev->link.ts = rdtscl(); 72 this.prev = node; 73 } 33 74 34 // We add a boat-load of assertions here because the anchor code is very fragile 35 /* paranoid */ verify( ((uintptr_t)( mock_head(this) ) + offsetof( $thread, link )) == (uintptr_t)(&this.anchor) ); 36 /* paranoid */ verify( &mock_head(this)->link.next == &this.anchor.next ); 37 /* paranoid */ verify( &mock_head(this)->link.ts == &this.anchor.ts ); 38 /* paranoid */ verify( mock_head(this)->link.next == 0p ); 39 /* paranoid */ verify( mock_head(this)->link.ts == 0 ); 40 /* paranoid */ verify( mock_head(this) == this.prev ); 41 /* paranoid */ verify( __alignof__(__intrusive_lane_t) == 128 ); 42 /* paranoid */ verify( __alignof__(this) == 128 ); 43 /* paranoid */ verifyf( ((intptr_t)(&this) % 128) == 0, "Expected address to be aligned %p %% 128 == %zd", &this, ((intptr_t)(&this) % 128) ); 44 } 75 // Pop a thread from this lane (must be non-empty) 76 // returns popped 77 // returns true of lane was empty before push, false otherwise 78 $thread * pop( __intrusive_lane_t & this ) { 79 /* paranoid */ verify( this.anchor.next != 0p ); 80 /* paranoid */ verify( this.anchor.ts != 0 ); 45 81 46 // Dtor is trivial47 void ^?{}( __intrusive_lane_t & this ) {48 // Make sure the list is empty49 /* paranoid */ verify( this.anchor.next == 0p );50 /* paranoid */ verify( this.anchor.ts == 0 );51 /* paranoid */ verify( mock_head(this) == this.prev );52 }82 // Get the relevant nodes locally 83 $thread * node = this.anchor.next; 84 this.anchor.next = node->link.next; 85 this.anchor.ts = node->link.ts; 86 bool is_empty = this.anchor.ts == 0; 87 node->link.next = 0p; 88 node->link.ts = 0; 53 89 54 // Push a thread onto this lane 55 // returns true of lane was empty before push, false otherwise 56 void push( __intrusive_lane_t & this, $thread * node ) { 57 /* paranoid */ verify( node->link.next == 0p ); 58 /* paranoid */ verify( node->link.ts == 0 ); 59 /* paranoid */ verify( this.prev->link.next == 0p ); 60 /* paranoid */ verify( this.prev->link.ts == 0 ); 61 if( this.anchor.next == 0p ) { 62 /* paranoid */ verify( this.anchor.next == 0p ); 63 /* paranoid */ verify( this.anchor.ts == 0 ); 64 /* paranoid */ verify( this.prev == mock_head( this ) ); 65 } else { 66 /* paranoid */ verify( this.anchor.next != 0p ); 67 /* paranoid */ verify( this.anchor.ts != 0 ); 68 /* paranoid */ verify( this.prev != mock_head( this ) ); 69 } 90 // Update head time stamp 91 if(is_empty) this.prev = mock_head( this ); 70 92 71 // Get the relevant nodes locally 72 this.prev->link.next = node; 73 this.prev->link.ts = rdtscl(); 74 this.prev = node; 75 } 93 /* paranoid */ verify( node->link.next == 0p ); 94 /* paranoid */ verify( node->link.ts == 0 ); 95 return node; 96 } 76 97 77 // Pop a thread from this lane (must be non-empty) 78 // returns popped 79 // returns true of lane was empty before push, false otherwise 80 $thread * pop( __intrusive_lane_t & this ) { 81 /* paranoid */ verify( this.anchor.next != 0p ); 82 /* paranoid */ verify( this.anchor.ts != 0 ); 98 // Check whether or not list is empty 99 static inline bool is_empty(__intrusive_lane_t & this) { 100 return this.anchor.ts == 0; 101 } 83 102 84 // Get the relevant nodes locally 85 $thread * node = this.anchor.next; 86 this.anchor.next = node->link.next; 87 this.anchor.ts = node->link.ts; 88 bool is_empty = this.anchor.ts == 0; 89 node->link.next = 0p; 90 node->link.ts = 0; 91 92 // Update head time stamp 93 if(is_empty) this.prev = mock_head( this ); 94 95 /* paranoid */ verify( node->link.next == 0p ); 96 /* paranoid */ verify( node->link.ts == 0 ); 97 return node; 98 } 99 100 // Check whether or not list is empty 101 static inline bool is_empty(__intrusive_lane_t & this) { 102 return this.anchor.ts == 0; 103 } 104 105 // Return the timestamp 106 static inline unsigned long long ts(__intrusive_lane_t & this) { 107 // Cannot verify here since it may not be locked 108 return this.anchor.ts; 109 } 110 #else 111 // Intrusives lanes which are used by the relaxed ready queue 112 struct __attribute__((aligned(128))) __intrusive_lane_t { 113 114 #if defined(USE_MPSC) 115 mpsc_queue($thread) queue; 116 __attribute__((aligned(128))) 117 #else 118 // anchor for the head and the tail of the queue 119 __attribute__((aligned(128))) struct __sentinel_t { 120 // Link lists fields 121 // instrusive link field for threads 122 // must be exactly as in $thread 123 __thread_desc_link link; 124 } before, after; 125 126 // spin lock protecting the queue 127 volatile bool lock; 128 #endif 129 130 // Optional statistic counters 131 #if !defined(__CFA_NO_SCHED_STATS__) 132 struct __attribute__((aligned(64))) { 133 // difference between number of push and pops 134 ssize_t diff; 135 136 // total number of pushes and pops 137 size_t push; 138 size_t pop ; 139 } stat; 140 #endif 141 }; 142 143 void ?{}(__intrusive_lane_t & this); 144 void ^?{}(__intrusive_lane_t & this); 145 146 // Get the head pointer (one before the first element) from the anchor 147 static inline $thread * head(const __intrusive_lane_t & this) { 148 #if defined(USE_MPSC) 149 return this.queue.head; 150 #else 151 $thread * rhead = ($thread *)( 152 (uintptr_t)( &this.before ) - offsetof( $thread, link ) 153 ); 154 /* paranoid */ verify(rhead); 155 return rhead; 156 #endif 157 } 158 159 // Get the tail pointer (one after the last element) from the anchor 160 static inline $thread * tail(const __intrusive_lane_t & this) { 161 #if defined(USE_MPSC) 162 return this.queue.tail; 163 #else 164 $thread * rtail = ($thread *)( 165 (uintptr_t)( &this.after ) - offsetof( $thread, link ) 166 ); 167 /* paranoid */ verify(rtail); 168 return rtail; 169 #endif 170 } 171 172 // Ctor 173 void ?{}( __intrusive_lane_t & this ) { 174 this.lock = false; 175 176 #if !defined(USE_MPSC) 177 this.before.link.prev = 0p; 178 this.before.link.next = tail(this); 179 this.before.link.ts = 0; 180 181 this.after .link.prev = head(this); 182 this.after .link.next = 0p; 183 this.after .link.ts = 0; 184 185 #if !defined(__CFA_NO_SCHED_STATS__) 186 this.stat.diff = 0; 187 this.stat.push = 0; 188 this.stat.pop = 0; 189 #endif 190 191 // We add a boat-load of assertions here because the anchor code is very fragile 192 /* paranoid */ verify(((uintptr_t)( head(this) ) + offsetof( $thread, link )) == (uintptr_t)(&this.before)); 193 /* paranoid */ verify(((uintptr_t)( tail(this) ) + offsetof( $thread, link )) == (uintptr_t)(&this.after )); 194 /* paranoid */ verify(head(this)->link.prev == 0p ); 195 /* paranoid */ verify(head(this)->link.next == tail(this) ); 196 /* paranoid */ verify(tail(this)->link.next == 0p ); 197 /* paranoid */ verify(tail(this)->link.prev == head(this) ); 198 /* paranoid */ verify(&head(this)->link.prev == &this.before.link.prev ); 199 /* paranoid */ verify(&head(this)->link.next == &this.before.link.next ); 200 /* paranoid */ verify(&tail(this)->link.prev == &this.after .link.prev ); 201 /* paranoid */ verify(&tail(this)->link.next == &this.after .link.next ); 202 /* paranoid */ verify(__alignof__(__intrusive_lane_t) == 128); 203 /* paranoid */ verify(__alignof__(this) == 128); 204 /* paranoid */ verifyf(((intptr_t)(&this) % 128) == 0, "Expected address to be aligned %p %% 128 == %zd", &this, ((intptr_t)(&this) % 128)); 205 #endif 206 } 207 208 // Dtor is trivial 209 void ^?{}( __intrusive_lane_t & this ) { 210 #if !defined(USE_MPSC) 211 // Make sure the list is empty 212 /* paranoid */ verify(head(this)->link.prev == 0p ); 213 /* paranoid */ verify(head(this)->link.next == tail(this) ); 214 /* paranoid */ verify(tail(this)->link.next == 0p ); 215 /* paranoid */ verify(tail(this)->link.prev == head(this) ); 216 #endif 217 } 218 219 // Push a thread onto this lane 220 // returns true of lane was empty before push, false otherwise 221 bool push(__intrusive_lane_t & this, $thread * node) { 222 #if defined(USE_MPSC) 223 inline $thread * volatile & ?`next ( $thread * this ) __attribute__((const)) { 224 return this->link.next; 225 } 226 push(this.queue, node); 227 #else 228 #if defined(__CFA_WITH_VERIFY__) 229 /* paranoid */ verify(this.lock); 230 /* paranoid */ verify(node->link.ts != 0); 231 /* paranoid */ verify(node->link.next == 0p); 232 /* paranoid */ verify(node->link.prev == 0p); 233 /* paranoid */ verify(tail(this)->link.next == 0p); 234 /* paranoid */ verify(head(this)->link.prev == 0p); 235 236 if(this.before.link.ts == 0l) { 237 /* paranoid */ verify(tail(this)->link.prev == head(this)); 238 /* paranoid */ verify(head(this)->link.next == tail(this)); 239 } else { 240 /* paranoid */ verify(tail(this)->link.prev != head(this)); 241 /* paranoid */ verify(head(this)->link.next != tail(this)); 242 } 243 #endif 244 245 // Get the relevant nodes locally 246 $thread * tail = tail(this); 247 $thread * prev = tail->link.prev; 248 249 // Do the push 250 node->link.next = tail; 251 node->link.prev = prev; 252 prev->link.next = node; 253 tail->link.prev = node; 254 255 // Update stats 256 #if !defined(__CFA_NO_SCHED_STATS__) 257 this.stat.diff++; 258 this.stat.push++; 259 #endif 260 261 verify(node->link.next == tail(this)); 262 263 // Check if the queue used to be empty 264 if(this.before.link.ts == 0l) { 265 this.before.link.ts = node->link.ts; 266 /* paranoid */ verify(node->link.prev == head(this)); 267 return true; 268 } 269 return false; 270 #endif 271 } 272 273 // Pop a thread from this lane (must be non-empty) 274 // returns popped 275 // returns true of lane was empty before push, false otherwise 276 $thread * pop(__intrusive_lane_t & this) { 277 /* paranoid */ verify(this.lock); 278 #if defined(USE_MPSC) 279 inline $thread * volatile & ?`next ( $thread * this ) __attribute__((const)) { 280 return this->link.next; 281 } 282 return pop(this.queue); 283 #else 284 /* paranoid */ verify(this.before.link.ts != 0ul); 285 286 // Get anchors locally 287 $thread * head = head(this); 288 $thread * tail = tail(this); 289 290 // Get the relevant nodes locally 291 $thread * node = head->link.next; 292 $thread * next = node->link.next; 293 294 /* paranoid */ verify(node != tail); 295 /* paranoid */ verify(node); 296 297 // Do the pop 298 head->link.next = next; 299 next->link.prev = head; 300 node->link.next = 0p; 301 node->link.prev = 0p; 302 303 // Update head time stamp 304 this.before.link.ts = next->link.ts; 305 306 // Update stats 307 #ifndef __CFA_NO_SCHED_STATS__ 308 this.stat.diff--; 309 this.stat.pop ++; 310 #endif 311 312 // Check if we emptied list and return accordingly 313 /* paranoid */ verify(tail(this)->link.next == 0p); 314 /* paranoid */ verify(head(this)->link.prev == 0p); 315 if(next == tail) { 316 /* paranoid */ verify(this.before.link.ts == 0); 317 /* paranoid */ verify(tail(this)->link.prev == head(this)); 318 /* paranoid */ verify(head(this)->link.next == tail(this)); 319 return node; 320 } 321 else { 322 /* paranoid */ verify(next->link.ts != 0); 323 /* paranoid */ verify(tail(this)->link.prev != head(this)); 324 /* paranoid */ verify(head(this)->link.next != tail(this)); 325 /* paranoid */ verify(this.before.link.ts != 0); 326 return node; 327 } 328 #endif 329 } 330 331 // Check whether or not list is empty 332 static inline bool is_empty(__intrusive_lane_t & this) { 333 #if defined(USE_MPSC) 334 return this.queue.head == 0p; 335 #else 336 // Cannot verify here since it may not be locked 337 return this.before.link.ts == 0; 338 #endif 339 } 340 341 // Return the timestamp 342 static inline unsigned long long ts(__intrusive_lane_t & this) { 343 #if defined(USE_MPSC) 344 $thread * tl = this.queue.head; 345 if(!tl) return -1ull; 346 return tl->link.ts; 347 #else 348 // Cannot verify here since it may not be locked 349 return this.before.link.ts; 350 #endif 351 } 352 #endif 103 // Return the timestamp 104 static inline unsigned long long ts(__intrusive_lane_t & this) { 105 // Cannot verify here since it may not be locked 106 return this.anchor.ts; 107 } 353 108 354 109 // Aligned timestamps which are used by the relaxed ready queue -
libcfa/src/concurrency/thread.cfa
rf04a3df6 rf6fdfb14 38 38 curr_cluster = &cl; 39 39 link.next = 0p; 40 link.prev = 0p;41 40 link.ts = 0; 42 41 link.preferred = -1u;
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