[8118303] | 1 | // |
---|
| 2 | // Cforall Version 1.0.0 Copyright (C) 2016 University of Waterloo |
---|
| 3 | // |
---|
| 4 | // The contents of this file are covered under the licence agreement in the |
---|
| 5 | // file "LICENCE" distributed with Cforall. |
---|
| 6 | // |
---|
| 7 | // kernel.c -- |
---|
| 8 | // |
---|
| 9 | // Author : Thierry Delisle |
---|
[75f3522] | 10 | // Created On : Tue Jan 17 12:27:26 2017 |
---|
[6b0b624] | 11 | // Last Modified By : Peter A. Buhr |
---|
[0190480] | 12 | // Last Modified On : Mon Aug 31 07:08:20 2020 |
---|
| 13 | // Update Count : 71 |
---|
[8118303] | 14 | // |
---|
| 15 | |
---|
[2026bb6] | 16 | #define __cforall_thread__ |
---|
[4069faad] | 17 | // #define __CFA_DEBUG_PRINT_RUNTIME_CORE__ |
---|
[2026bb6] | 18 | |
---|
[8118303] | 19 | //C Includes |
---|
[214e8da] | 20 | #include <errno.h> |
---|
[9d944b2] | 21 | #include <stdio.h> |
---|
[58b6d1b] | 22 | #include <signal.h> |
---|
[9d944b2] | 23 | #include <unistd.h> |
---|
[8118303] | 24 | |
---|
| 25 | //CFA Includes |
---|
[73abe95] | 26 | #include "kernel_private.hfa" |
---|
| 27 | #include "preemption.hfa" |
---|
[8118303] | 28 | |
---|
| 29 | //Private includes |
---|
| 30 | #define __CFA_INVOKE_PRIVATE__ |
---|
| 31 | #include "invoke.h" |
---|
| 32 | |
---|
[4069faad] | 33 | |
---|
[deca0f5] | 34 | //----------------------------------------------------------------------------- |
---|
| 35 | // Some assembly required |
---|
[1805b1b] | 36 | #if defined( __i386 ) |
---|
[deca0f5] | 37 | // mxcr : SSE Status and Control bits (control bits are preserved across function calls) |
---|
| 38 | // fcw : X87 FPU control word (preserved across function calls) |
---|
| 39 | #define __x87_store \ |
---|
| 40 | uint32_t __mxcr; \ |
---|
| 41 | uint16_t __fcw; \ |
---|
| 42 | __asm__ volatile ( \ |
---|
| 43 | "stmxcsr %0\n" \ |
---|
| 44 | "fnstcw %1\n" \ |
---|
| 45 | : "=m" (__mxcr),\ |
---|
| 46 | "=m" (__fcw) \ |
---|
| 47 | ) |
---|
| 48 | |
---|
| 49 | #define __x87_load \ |
---|
| 50 | __asm__ volatile ( \ |
---|
| 51 | "fldcw %1\n" \ |
---|
| 52 | "ldmxcsr %0\n" \ |
---|
| 53 | ::"m" (__mxcr),\ |
---|
| 54 | "m" (__fcw) \ |
---|
| 55 | ) |
---|
| 56 | |
---|
| 57 | #elif defined( __x86_64 ) |
---|
| 58 | #define __x87_store \ |
---|
| 59 | uint32_t __mxcr; \ |
---|
| 60 | uint16_t __fcw; \ |
---|
| 61 | __asm__ volatile ( \ |
---|
| 62 | "stmxcsr %0\n" \ |
---|
| 63 | "fnstcw %1\n" \ |
---|
| 64 | : "=m" (__mxcr),\ |
---|
| 65 | "=m" (__fcw) \ |
---|
| 66 | ) |
---|
| 67 | |
---|
| 68 | #define __x87_load \ |
---|
| 69 | __asm__ volatile ( \ |
---|
| 70 | "fldcw %1\n" \ |
---|
| 71 | "ldmxcsr %0\n" \ |
---|
| 72 | :: "m" (__mxcr),\ |
---|
| 73 | "m" (__fcw) \ |
---|
| 74 | ) |
---|
| 75 | |
---|
[0190480] | 76 | #elif defined( __arm__ ) |
---|
| 77 | #define __x87_store |
---|
| 78 | #define __x87_load |
---|
| 79 | |
---|
| 80 | #elif defined( __aarch64__ ) |
---|
[74f5c83] | 81 | #define __x87_store \ |
---|
| 82 | uint32_t __fpcntl[2]; \ |
---|
| 83 | __asm__ volatile ( \ |
---|
| 84 | "mrs x9, FPCR\n" \ |
---|
| 85 | "mrs x10, FPSR\n" \ |
---|
| 86 | "stp x9, x10, %0\n" \ |
---|
| 87 | : "=m" (__fpcntl) : : "x9", "x10" \ |
---|
| 88 | ) |
---|
| 89 | |
---|
| 90 | #define __x87_load \ |
---|
| 91 | __asm__ volatile ( \ |
---|
| 92 | "ldp x9, x10, %0\n" \ |
---|
| 93 | "msr FPSR, x10\n" \ |
---|
| 94 | "msr FPCR, x9\n" \ |
---|
| 95 | : "=m" (__fpcntl) : : "x9", "x10" \ |
---|
| 96 | ) |
---|
| 97 | |
---|
[deca0f5] | 98 | #else |
---|
[0190480] | 99 | #error unsupported hardware architecture |
---|
[deca0f5] | 100 | #endif |
---|
| 101 | |
---|
[e660761] | 102 | extern $thread * mainThread; |
---|
| 103 | extern processor * mainProcessor; |
---|
[2ac095d] | 104 | |
---|
[92e7631] | 105 | //----------------------------------------------------------------------------- |
---|
| 106 | // Kernel Scheduling logic |
---|
| 107 | static $thread * __next_thread(cluster * this); |
---|
[1eb239e4] | 108 | static $thread * __next_thread_slow(cluster * this); |
---|
[92e7631] | 109 | static void __run_thread(processor * this, $thread * dst); |
---|
[e873838] | 110 | static void __wake_one(cluster * cltr); |
---|
[1eb239e4] | 111 | |
---|
| 112 | static void push (__cluster_idles & idles, processor & proc); |
---|
| 113 | static void remove(__cluster_idles & idles, processor & proc); |
---|
| 114 | static [unsigned idle, unsigned total, * processor] query( & __cluster_idles idles ); |
---|
| 115 | |
---|
[c84e80a] | 116 | |
---|
[75f3522] | 117 | //============================================================================================= |
---|
| 118 | // Kernel Scheduling logic |
---|
| 119 | //============================================================================================= |
---|
[8fcbb4c] | 120 | //Main of the processor contexts |
---|
[83a071f9] | 121 | void main(processorCtx_t & runner) { |
---|
[21184e3] | 122 | // Because of a bug, we couldn't initialized the seed on construction |
---|
| 123 | // Do it here |
---|
[8fc652e0] | 124 | __cfaabi_tls.rand_seed ^= rdtscl(); |
---|
| 125 | __cfaabi_tls.ready_rng.fwd_seed = 25214903917_l64u * (rdtscl() ^ (uintptr_t)&runner); |
---|
[f2384c9a] | 126 | __tls_rand_advance_bck(); |
---|
[21184e3] | 127 | |
---|
[83a071f9] | 128 | processor * this = runner.proc; |
---|
[094476d] | 129 | verify(this); |
---|
[c81ebf9] | 130 | |
---|
[4069faad] | 131 | __cfadbg_print_safe(runtime_core, "Kernel : core %p starting\n", this); |
---|
[28d73c1] | 132 | #if !defined(__CFA_NO_STATISTICS__) |
---|
| 133 | if( this->print_halts ) { |
---|
| 134 | __cfaabi_bits_print_safe( STDOUT_FILENO, "Processor : %d - %s (%p)\n", this->id, this->name, (void*)this); |
---|
| 135 | } |
---|
| 136 | #endif |
---|
[b798713] | 137 | |
---|
[75f3522] | 138 | { |
---|
[c81ebf9] | 139 | // Setup preemption data |
---|
| 140 | preemption_scope scope = { this }; |
---|
| 141 | |
---|
[4069faad] | 142 | __cfadbg_print_safe(runtime_core, "Kernel : core %p started\n", this); |
---|
[8118303] | 143 | |
---|
[ac2b598] | 144 | $thread * readyThread = 0p; |
---|
[1eb239e4] | 145 | MAIN_LOOP: |
---|
| 146 | for() { |
---|
[92e7631] | 147 | // Try to get the next thread |
---|
[8c50aed] | 148 | readyThread = __next_thread( this->cltr ); |
---|
[75f3522] | 149 | |
---|
[1eb239e4] | 150 | if( !readyThread ) { |
---|
| 151 | readyThread = __next_thread_slow( this->cltr ); |
---|
| 152 | } |
---|
[4e6fb8e] | 153 | |
---|
[1eb239e4] | 154 | HALT: |
---|
| 155 | if( !readyThread ) { |
---|
| 156 | // Don't block if we are done |
---|
| 157 | if( __atomic_load_n(&this->do_terminate, __ATOMIC_SEQ_CST) ) break MAIN_LOOP; |
---|
[c81ebf9] | 158 | |
---|
[1eb239e4] | 159 | #if !defined(__CFA_NO_STATISTICS__) |
---|
| 160 | __tls_stats()->ready.sleep.halts++; |
---|
| 161 | #endif |
---|
[398e8e9] | 162 | |
---|
[1eb239e4] | 163 | // Push self to idle stack |
---|
| 164 | push(this->cltr->idles, * this); |
---|
[398e8e9] | 165 | |
---|
[1eb239e4] | 166 | // Confirm the ready-queue is empty |
---|
| 167 | readyThread = __next_thread_slow( this->cltr ); |
---|
| 168 | if( readyThread ) { |
---|
| 169 | // A thread was found, cancel the halt |
---|
| 170 | remove(this->cltr->idles, * this); |
---|
| 171 | |
---|
| 172 | #if !defined(__CFA_NO_STATISTICS__) |
---|
| 173 | __tls_stats()->ready.sleep.cancels++; |
---|
| 174 | #endif |
---|
| 175 | |
---|
| 176 | // continue the mai loop |
---|
| 177 | break HALT; |
---|
| 178 | } |
---|
| 179 | |
---|
| 180 | #if !defined(__CFA_NO_STATISTICS__) |
---|
| 181 | if(this->print_halts) { |
---|
| 182 | __cfaabi_bits_print_safe( STDOUT_FILENO, "PH:%d - %lld 0\n", this->id, rdtscl()); |
---|
| 183 | } |
---|
| 184 | #endif |
---|
| 185 | |
---|
| 186 | wait( this->idle ); |
---|
| 187 | |
---|
| 188 | #if !defined(__CFA_NO_STATISTICS__) |
---|
| 189 | if(this->print_halts) { |
---|
| 190 | __cfaabi_bits_print_safe( STDOUT_FILENO, "PH:%d - %lld 1\n", this->id, rdtscl()); |
---|
| 191 | } |
---|
| 192 | #endif |
---|
| 193 | |
---|
| 194 | // We were woken up, remove self from idle |
---|
| 195 | remove(this->cltr->idles, * this); |
---|
| 196 | |
---|
| 197 | // DON'T just proceed, start looking again |
---|
| 198 | continue MAIN_LOOP; |
---|
[64a7146] | 199 | } |
---|
[1eb239e4] | 200 | |
---|
| 201 | /* paranoid */ verify( readyThread ); |
---|
| 202 | |
---|
| 203 | // We found a thread run it |
---|
| 204 | __run_thread(this, readyThread); |
---|
| 205 | |
---|
| 206 | // Are we done? |
---|
| 207 | if( __atomic_load_n(&this->do_terminate, __ATOMIC_SEQ_CST) ) break MAIN_LOOP; |
---|
[c81ebf9] | 208 | } |
---|
| 209 | |
---|
[4069faad] | 210 | __cfadbg_print_safe(runtime_core, "Kernel : core %p stopping\n", this); |
---|
[c84e80a] | 211 | } |
---|
[8118303] | 212 | |
---|
[4cedd9f] | 213 | V( this->terminated ); |
---|
[bdeba0b] | 214 | |
---|
[28d73c1] | 215 | if(this == mainProcessor) { |
---|
[6a490b2] | 216 | // HACK : the coroutine context switch expects this_thread to be set |
---|
| 217 | // and it make sense for it to be set in all other cases except here |
---|
| 218 | // fake it |
---|
[8fc652e0] | 219 | __cfaabi_tls.this_thread = mainThread; |
---|
[6a490b2] | 220 | } |
---|
[7768b8d] | 221 | |
---|
[4069faad] | 222 | __cfadbg_print_safe(runtime_core, "Kernel : core %p terminated\n", this); |
---|
[c84e80a] | 223 | } |
---|
| 224 | |
---|
[5c1a531] | 225 | static int * __volatile_errno() __attribute__((noinline)); |
---|
| 226 | static int * __volatile_errno() { asm(""); return &errno; } |
---|
| 227 | |
---|
[14a61b5] | 228 | // KERNEL ONLY |
---|
[1c273d0] | 229 | // runThread runs a thread by context switching |
---|
| 230 | // from the processor coroutine to the target thread |
---|
[ac2b598] | 231 | static void __run_thread(processor * this, $thread * thrd_dst) { |
---|
[8fc652e0] | 232 | /* paranoid */ verify( ! __preemption_enabled() ); |
---|
[1eb239e4] | 233 | /* paranoid */ verifyf( thrd_dst->state == Ready || thrd_dst->preempted != __NO_PREEMPTION, "state : %d, preempted %d\n", thrd_dst->state, thrd_dst->preempted); |
---|
| 234 | /* paranoid */ verifyf( thrd_dst->link.next == 0p, "Expected null got %p", thrd_dst->link.next ); |
---|
| 235 | __builtin_prefetch( thrd_dst->context.SP ); |
---|
| 236 | |
---|
[ac2b598] | 237 | $coroutine * proc_cor = get_coroutine(this->runner); |
---|
[8fcbb4c] | 238 | |
---|
[9f575ea] | 239 | // set state of processor coroutine to inactive |
---|
| 240 | verify(proc_cor->state == Active); |
---|
[ae7be7a] | 241 | proc_cor->state = Blocked; |
---|
[e8e457e] | 242 | |
---|
[9f575ea] | 243 | // Actually run the thread |
---|
[3381ed7] | 244 | RUNNING: while(true) { |
---|
[ff79d5e] | 245 | thrd_dst->preempted = __NO_PREEMPTION; |
---|
| 246 | thrd_dst->state = Active; |
---|
[e8e457e] | 247 | |
---|
[58d64a4] | 248 | // Update global state |
---|
[8fc652e0] | 249 | kernelTLS().this_thread = thrd_dst; |
---|
[75f3522] | 250 | |
---|
[8fc652e0] | 251 | /* paranoid */ verify( ! __preemption_enabled() ); |
---|
| 252 | /* paranoid */ verify( kernelTLS().this_thread == thrd_dst ); |
---|
[9d6e1b8a] | 253 | /* paranoid */ verify( thrd_dst->curr_cluster == this->cltr ); |
---|
[b4b63e8] | 254 | /* paranoid */ verify( thrd_dst->context.SP ); |
---|
[5afb49a] | 255 | /* paranoid */ verify( thrd_dst->state != Halted ); |
---|
[210b8b3] | 256 | /* paranoid */ verifyf( ((uintptr_t)thrd_dst->context.SP) < ((uintptr_t)__get_stack(thrd_dst->curr_cor)->base ) || thrd_dst->curr_cor == proc_cor, "ERROR : Destination $thread %p has been corrupted.\n StackPointer too small.\n", thrd_dst ); // add escape condition if we are setting up the processor |
---|
| 257 | /* paranoid */ verifyf( ((uintptr_t)thrd_dst->context.SP) > ((uintptr_t)__get_stack(thrd_dst->curr_cor)->limit) || thrd_dst->curr_cor == proc_cor, "ERROR : Destination $thread %p has been corrupted.\n StackPointer too large.\n", thrd_dst ); // add escape condition if we are setting up the processor |
---|
[ac12f1f] | 258 | /* paranoid */ verify( 0x0D15EA5E0D15EA5Ep == thrd_dst->canary ); |
---|
[b4b63e8] | 259 | |
---|
[3381ed7] | 260 | |
---|
[58d64a4] | 261 | |
---|
[9f575ea] | 262 | // set context switch to the thread that the processor is executing |
---|
[c7a900a] | 263 | __cfactx_switch( &proc_cor->context, &thrd_dst->context ); |
---|
| 264 | // when __cfactx_switch returns we are back in the processor coroutine |
---|
[9f575ea] | 265 | |
---|
[ac12f1f] | 266 | /* paranoid */ verify( 0x0D15EA5E0D15EA5Ep == thrd_dst->canary ); |
---|
[210b8b3] | 267 | /* paranoid */ verifyf( ((uintptr_t)thrd_dst->context.SP) > ((uintptr_t)__get_stack(thrd_dst->curr_cor)->limit), "ERROR : Destination $thread %p has been corrupted.\n StackPointer too large.\n", thrd_dst ); |
---|
| 268 | /* paranoid */ verifyf( ((uintptr_t)thrd_dst->context.SP) < ((uintptr_t)__get_stack(thrd_dst->curr_cor)->base ), "ERROR : Destination $thread %p has been corrupted.\n StackPointer too small.\n", thrd_dst ); |
---|
[b4b63e8] | 269 | /* paranoid */ verify( thrd_dst->context.SP ); |
---|
[9d6e1b8a] | 270 | /* paranoid */ verify( thrd_dst->curr_cluster == this->cltr ); |
---|
[8fc652e0] | 271 | /* paranoid */ verify( kernelTLS().this_thread == thrd_dst ); |
---|
| 272 | /* paranoid */ verify( ! __preemption_enabled() ); |
---|
[75f3522] | 273 | |
---|
[58d64a4] | 274 | // Reset global state |
---|
[8fc652e0] | 275 | kernelTLS().this_thread = 0p; |
---|
[3381ed7] | 276 | |
---|
| 277 | // We just finished running a thread, there are a few things that could have happened. |
---|
| 278 | // 1 - Regular case : the thread has blocked and now one has scheduled it yet. |
---|
| 279 | // 2 - Racy case : the thread has blocked but someone has already tried to schedule it. |
---|
| 280 | // 4 - Preempted |
---|
| 281 | // In case 1, we may have won a race so we can't write to the state again. |
---|
| 282 | // In case 2, we lost the race so we now own the thread. |
---|
| 283 | |
---|
| 284 | if(unlikely(thrd_dst->preempted != __NO_PREEMPTION)) { |
---|
| 285 | // The thread was preempted, reschedule it and reset the flag |
---|
[e873838] | 286 | __schedule_thread( thrd_dst ); |
---|
[3381ed7] | 287 | break RUNNING; |
---|
| 288 | } |
---|
[75f3522] | 289 | |
---|
[3ea8ad1] | 290 | if(unlikely(thrd_dst->state == Halting)) { |
---|
[ff79d5e] | 291 | // The thread has halted, it should never be scheduled/run again |
---|
[5afb49a] | 292 | // finish the thread |
---|
| 293 | __thread_finish( thrd_dst ); |
---|
[ff79d5e] | 294 | break RUNNING; |
---|
| 295 | } |
---|
| 296 | |
---|
| 297 | /* paranoid */ verify( thrd_dst->state == Active ); |
---|
| 298 | thrd_dst->state = Blocked; |
---|
| 299 | |
---|
[3381ed7] | 300 | // set state of processor coroutine to active and the thread to inactive |
---|
[ff79d5e] | 301 | int old_ticket = __atomic_fetch_sub(&thrd_dst->ticket, 1, __ATOMIC_SEQ_CST); |
---|
| 302 | switch(old_ticket) { |
---|
[6a77224] | 303 | case TICKET_RUNNING: |
---|
[3381ed7] | 304 | // This is case 1, the regular case, nothing more is needed |
---|
| 305 | break RUNNING; |
---|
[6a77224] | 306 | case TICKET_UNBLOCK: |
---|
[3381ed7] | 307 | // This is case 2, the racy case, someone tried to run this thread before it finished blocking |
---|
| 308 | // In this case, just run it again. |
---|
| 309 | continue RUNNING; |
---|
| 310 | default: |
---|
| 311 | // This makes no sense, something is wrong abort |
---|
[ff79d5e] | 312 | abort(); |
---|
[3381ed7] | 313 | } |
---|
[9f575ea] | 314 | } |
---|
[e8e457e] | 315 | |
---|
[9f575ea] | 316 | // Just before returning to the processor, set the processor coroutine to active |
---|
[e8e457e] | 317 | proc_cor->state = Active; |
---|
[1eb239e4] | 318 | |
---|
[8fc652e0] | 319 | /* paranoid */ verify( ! __preemption_enabled() ); |
---|
[82c948c] | 320 | } |
---|
| 321 | |
---|
[14a61b5] | 322 | // KERNEL_ONLY |
---|
[b0c7419] | 323 | void returnToKernel() { |
---|
[8fc652e0] | 324 | /* paranoid */ verify( ! __preemption_enabled() ); |
---|
| 325 | $coroutine * proc_cor = get_coroutine(kernelTLS().this_processor->runner); |
---|
| 326 | $thread * thrd_src = kernelTLS().this_thread; |
---|
[e8e457e] | 327 | |
---|
[29cb302] | 328 | #if !defined(__CFA_NO_STATISTICS__) |
---|
[8fc652e0] | 329 | struct processor * last_proc = kernelTLS().this_processor; |
---|
[29cb302] | 330 | #endif |
---|
| 331 | |
---|
[9f575ea] | 332 | // Run the thread on this processor |
---|
| 333 | { |
---|
| 334 | int local_errno = *__volatile_errno(); |
---|
| 335 | #if defined( __i386 ) || defined( __x86_64 ) |
---|
| 336 | __x87_store; |
---|
| 337 | #endif |
---|
[b4b63e8] | 338 | /* paranoid */ verify( proc_cor->context.SP ); |
---|
[ac12f1f] | 339 | /* paranoid */ verify( 0x0D15EA5E0D15EA5Ep == thrd_src->canary ); |
---|
[c7a900a] | 340 | __cfactx_switch( &thrd_src->context, &proc_cor->context ); |
---|
[ac12f1f] | 341 | /* paranoid */ verify( 0x0D15EA5E0D15EA5Ep == thrd_src->canary ); |
---|
[9f575ea] | 342 | #if defined( __i386 ) || defined( __x86_64 ) |
---|
| 343 | __x87_load; |
---|
| 344 | #endif |
---|
| 345 | *__volatile_errno() = local_errno; |
---|
[8fcbb4c] | 346 | } |
---|
[deca0f5] | 347 | |
---|
[29cb302] | 348 | #if !defined(__CFA_NO_STATISTICS__) |
---|
[8fc652e0] | 349 | if(last_proc != kernelTLS().this_processor) { |
---|
[29cb302] | 350 | __tls_stats()->ready.threads.migration++; |
---|
| 351 | } |
---|
| 352 | #endif |
---|
| 353 | |
---|
[8fc652e0] | 354 | /* paranoid */ verify( ! __preemption_enabled() ); |
---|
[210b8b3] | 355 | /* paranoid */ verifyf( ((uintptr_t)thrd_src->context.SP) < ((uintptr_t)__get_stack(thrd_src->curr_cor)->base ), "ERROR : Returning $thread %p has been corrupted.\n StackPointer too small.\n", thrd_src ); |
---|
| 356 | /* paranoid */ verifyf( ((uintptr_t)thrd_src->context.SP) > ((uintptr_t)__get_stack(thrd_src->curr_cor)->limit), "ERROR : Returning $thread %p has been corrupted.\n StackPointer too large.\n", thrd_src ); |
---|
[c84e80a] | 357 | } |
---|
| 358 | |
---|
[8def349] | 359 | //----------------------------------------------------------------------------- |
---|
| 360 | // Scheduler routines |
---|
[14a61b5] | 361 | // KERNEL ONLY |
---|
[e873838] | 362 | void __schedule_thread( $thread * thrd ) { |
---|
[8fc652e0] | 363 | /* paranoid */ verify( ! __preemption_enabled() ); |
---|
[9d6e1b8a] | 364 | /* paranoid */ verify( kernelTLS().this_proc_id ); |
---|
[6a490b2] | 365 | /* paranoid */ verify( thrd ); |
---|
| 366 | /* paranoid */ verify( thrd->state != Halted ); |
---|
[9d6e1b8a] | 367 | /* paranoid */ verify( thrd->curr_cluster ); |
---|
[3381ed7] | 368 | /* paranoid */ #if defined( __CFA_WITH_VERIFY__ ) |
---|
[504a7dc] | 369 | /* paranoid */ if( thrd->state == Blocked || thrd->state == Start ) assertf( thrd->preempted == __NO_PREEMPTION, |
---|
| 370 | "Error inactive thread marked as preempted, state %d, preemption %d\n", thrd->state, thrd->preempted ); |
---|
[ff79d5e] | 371 | /* paranoid */ if( thrd->preempted != __NO_PREEMPTION ) assertf(thrd->state == Active, |
---|
[504a7dc] | 372 | "Error preempted thread marked as not currently running, state %d, preemption %d\n", thrd->state, thrd->preempted ); |
---|
[3381ed7] | 373 | /* paranoid */ #endif |
---|
[6a490b2] | 374 | /* paranoid */ verifyf( thrd->link.next == 0p, "Expected null got %p", thrd->link.next ); |
---|
[ac12f1f] | 375 | /* paranoid */ verify( 0x0D15EA5E0D15EA5Ep == thrd->canary ); |
---|
[b4b63e8] | 376 | |
---|
[9f575ea] | 377 | |
---|
[ae7be7a] | 378 | if (thrd->preempted == __NO_PREEMPTION) thrd->state = Ready; |
---|
[6b4cdd3] | 379 | |
---|
[e873838] | 380 | ready_schedule_lock(); |
---|
[504a7dc] | 381 | push( thrd->curr_cluster, thrd ); |
---|
[e873838] | 382 | __wake_one(thrd->curr_cluster); |
---|
| 383 | ready_schedule_unlock(); |
---|
[1c273d0] | 384 | |
---|
[8fc652e0] | 385 | /* paranoid */ verify( ! __preemption_enabled() ); |
---|
[db6f06a] | 386 | } |
---|
| 387 | |
---|
[14a61b5] | 388 | // KERNEL ONLY |
---|
[1eb239e4] | 389 | static inline $thread * __next_thread(cluster * this) with( *this ) { |
---|
[8fc652e0] | 390 | /* paranoid */ verify( ! __preemption_enabled() ); |
---|
| 391 | /* paranoid */ verify( kernelTLS().this_proc_id ); |
---|
[7768b8d] | 392 | |
---|
[e873838] | 393 | ready_schedule_lock(); |
---|
[1eb239e4] | 394 | $thread * thrd = pop( this ); |
---|
[e873838] | 395 | ready_schedule_unlock(); |
---|
[7768b8d] | 396 | |
---|
[8fc652e0] | 397 | /* paranoid */ verify( kernelTLS().this_proc_id ); |
---|
| 398 | /* paranoid */ verify( ! __preemption_enabled() ); |
---|
[1eb239e4] | 399 | return thrd; |
---|
[eb2e723] | 400 | } |
---|
| 401 | |
---|
[64a7146] | 402 | // KERNEL ONLY |
---|
[1eb239e4] | 403 | static inline $thread * __next_thread_slow(cluster * this) with( *this ) { |
---|
[8fc652e0] | 404 | /* paranoid */ verify( ! __preemption_enabled() ); |
---|
| 405 | /* paranoid */ verify( kernelTLS().this_proc_id ); |
---|
[64a7146] | 406 | |
---|
[e873838] | 407 | ready_schedule_lock(); |
---|
[1eb239e4] | 408 | $thread * thrd = pop_slow( this ); |
---|
[e873838] | 409 | ready_schedule_unlock(); |
---|
[64a7146] | 410 | |
---|
[8fc652e0] | 411 | /* paranoid */ verify( kernelTLS().this_proc_id ); |
---|
| 412 | /* paranoid */ verify( ! __preemption_enabled() ); |
---|
[1eb239e4] | 413 | return thrd; |
---|
[64a7146] | 414 | } |
---|
| 415 | |
---|
[e873838] | 416 | void unpark( $thread * thrd ) { |
---|
| 417 | if( !thrd ) return; |
---|
| 418 | |
---|
[ff79d5e] | 419 | int old_ticket = __atomic_fetch_add(&thrd->ticket, 1, __ATOMIC_SEQ_CST); |
---|
| 420 | switch(old_ticket) { |
---|
[6a77224] | 421 | case TICKET_RUNNING: |
---|
[3381ed7] | 422 | // Wake won the race, the thread will reschedule/rerun itself |
---|
| 423 | break; |
---|
[6a77224] | 424 | case TICKET_BLOCKED: |
---|
[3381ed7] | 425 | /* paranoid */ verify( ! thrd->preempted != __NO_PREEMPTION ); |
---|
[ff79d5e] | 426 | /* paranoid */ verify( thrd->state == Blocked ); |
---|
[0b33412] | 427 | |
---|
[8fc652e0] | 428 | { |
---|
| 429 | /* paranoid */ verify( publicTLS_get(this_proc_id) ); |
---|
| 430 | bool full = publicTLS_get(this_proc_id)->full_proc; |
---|
| 431 | if(full) disable_interrupts(); |
---|
| 432 | |
---|
| 433 | /* paranoid */ verify( ! __preemption_enabled() ); |
---|
| 434 | |
---|
| 435 | // Wake lost the race, |
---|
| 436 | __schedule_thread( thrd ); |
---|
| 437 | |
---|
| 438 | /* paranoid */ verify( ! __preemption_enabled() ); |
---|
| 439 | |
---|
| 440 | if(full) enable_interrupts( __cfaabi_dbg_ctx ); |
---|
| 441 | /* paranoid */ verify( publicTLS_get(this_proc_id) ); |
---|
| 442 | } |
---|
| 443 | |
---|
[3381ed7] | 444 | break; |
---|
| 445 | default: |
---|
| 446 | // This makes no sense, something is wrong abort |
---|
[7ee8153] | 447 | abort("Thread %p (%s) has mismatch park/unpark\n", thrd, thrd->self_cor.name); |
---|
[de6319f] | 448 | } |
---|
[eb2e723] | 449 | } |
---|
| 450 | |
---|
[e235429] | 451 | void park( void ) { |
---|
[8fc652e0] | 452 | /* paranoid */ verify( __preemption_enabled() ); |
---|
[82ff5845] | 453 | disable_interrupts(); |
---|
[8fc652e0] | 454 | /* paranoid */ verify( ! __preemption_enabled() ); |
---|
| 455 | /* paranoid */ verify( kernelTLS().this_thread->preempted == __NO_PREEMPTION ); |
---|
[0b33412] | 456 | |
---|
[82c948c] | 457 | returnToKernel(); |
---|
[0b33412] | 458 | |
---|
[8fc652e0] | 459 | /* paranoid */ verify( ! __preemption_enabled() ); |
---|
[36982fc] | 460 | enable_interrupts( __cfaabi_dbg_ctx ); |
---|
[8fc652e0] | 461 | /* paranoid */ verify( __preemption_enabled() ); |
---|
[0c78741] | 462 | |
---|
| 463 | } |
---|
[09800e9] | 464 | |
---|
[5afb49a] | 465 | extern "C" { |
---|
| 466 | // Leave the thread monitor |
---|
| 467 | // last routine called by a thread. |
---|
| 468 | // Should never return |
---|
| 469 | void __cfactx_thrd_leave() { |
---|
[8fc652e0] | 470 | $thread * thrd = active_thread(); |
---|
[5afb49a] | 471 | $monitor * this = &thrd->self_mon; |
---|
| 472 | |
---|
| 473 | // Lock the monitor now |
---|
| 474 | lock( this->lock __cfaabi_dbg_ctx2 ); |
---|
| 475 | |
---|
| 476 | disable_interrupts(); |
---|
| 477 | |
---|
[9d6e1b8a] | 478 | /* paranoid */ verify( ! __preemption_enabled() ); |
---|
| 479 | /* paranoid */ verify( thrd->state == Active ); |
---|
| 480 | /* paranoid */ verify( 0x0D15EA5E0D15EA5Ep == thrd->canary ); |
---|
| 481 | /* paranoid */ verify( kernelTLS().this_thread == thrd ); |
---|
| 482 | /* paranoid */ verify( thrd->context.SP ); |
---|
| 483 | /* paranoid */ verifyf( ((uintptr_t)thrd->context.SP) > ((uintptr_t)__get_stack(thrd->curr_cor)->limit), "ERROR : $thread %p has been corrupted.\n StackPointer too large.\n", thrd ); |
---|
| 484 | /* paranoid */ verifyf( ((uintptr_t)thrd->context.SP) < ((uintptr_t)__get_stack(thrd->curr_cor)->base ), "ERROR : $thread %p has been corrupted.\n StackPointer too small.\n", thrd ); |
---|
| 485 | |
---|
[3ea8ad1] | 486 | thrd->state = Halting; |
---|
[58688bf] | 487 | if( TICKET_RUNNING != thrd->ticket ) { abort( "Thread terminated with pending unpark" ); } |
---|
[9d6e1b8a] | 488 | if( thrd != this->owner ) { abort( "Thread internal monitor has incorrect owner" ); } |
---|
| 489 | if( this->recursion != 1) { abort( "Thread internal monitor has unbalanced recursion" ); } |
---|
[5afb49a] | 490 | |
---|
| 491 | // Leave the thread |
---|
| 492 | returnToKernel(); |
---|
| 493 | |
---|
| 494 | // Control flow should never reach here! |
---|
[9d6e1b8a] | 495 | abort(); |
---|
[5afb49a] | 496 | } |
---|
[09800e9] | 497 | } |
---|
| 498 | |
---|
[14a61b5] | 499 | // KERNEL ONLY |
---|
[3381ed7] | 500 | bool force_yield( __Preemption_Reason reason ) { |
---|
[8fc652e0] | 501 | /* paranoid */ verify( __preemption_enabled() ); |
---|
[09800e9] | 502 | disable_interrupts(); |
---|
[8fc652e0] | 503 | /* paranoid */ verify( ! __preemption_enabled() ); |
---|
[09800e9] | 504 | |
---|
[8fc652e0] | 505 | $thread * thrd = kernelTLS().this_thread; |
---|
[ff79d5e] | 506 | /* paranoid */ verify(thrd->state == Active); |
---|
[3381ed7] | 507 | |
---|
| 508 | // SKULLDUGGERY: It is possible that we are preempting this thread just before |
---|
| 509 | // it was going to park itself. If that is the case and it is already using the |
---|
| 510 | // intrusive fields then we can't use them to preempt the thread |
---|
| 511 | // If that is the case, abandon the preemption. |
---|
| 512 | bool preempted = false; |
---|
[504a7dc] | 513 | if(thrd->link.next == 0p) { |
---|
[3381ed7] | 514 | preempted = true; |
---|
| 515 | thrd->preempted = reason; |
---|
| 516 | returnToKernel(); |
---|
[de6319f] | 517 | } |
---|
[f2b12406] | 518 | |
---|
[8fc652e0] | 519 | /* paranoid */ verify( ! __preemption_enabled() ); |
---|
[3381ed7] | 520 | enable_interrupts_noPoll(); |
---|
[8fc652e0] | 521 | /* paranoid */ verify( __preemption_enabled() ); |
---|
[f2b12406] | 522 | |
---|
[3381ed7] | 523 | return preempted; |
---|
[f2b12406] | 524 | } |
---|
| 525 | |
---|
[14a61b5] | 526 | //============================================================================================= |
---|
[92e7631] | 527 | // Kernel Idle Sleep |
---|
[14a61b5] | 528 | //============================================================================================= |
---|
[64a7146] | 529 | // Wake a thread from the front if there are any |
---|
[e873838] | 530 | static void __wake_one(cluster * this) { |
---|
[8fc652e0] | 531 | /* paranoid */ verify( ! __preemption_enabled() ); |
---|
[e873838] | 532 | /* paranoid */ verify( ready_schedule_islocked() ); |
---|
[14a61b5] | 533 | |
---|
[64a7146] | 534 | // Check if there is a sleeping processor |
---|
[1eb239e4] | 535 | processor * p; |
---|
| 536 | unsigned idle; |
---|
| 537 | unsigned total; |
---|
| 538 | [idle, total, p] = query(this->idles); |
---|
[14a61b5] | 539 | |
---|
[64a7146] | 540 | // If no one is sleeping, we are done |
---|
[1eb239e4] | 541 | if( idle == 0 ) return; |
---|
[14a61b5] | 542 | |
---|
[64a7146] | 543 | // We found a processor, wake it up |
---|
| 544 | post( p->idle ); |
---|
[14a61b5] | 545 | |
---|
[1eb239e4] | 546 | #if !defined(__CFA_NO_STATISTICS__) |
---|
| 547 | __tls_stats()->ready.sleep.wakes++; |
---|
| 548 | #endif |
---|
| 549 | |
---|
[e873838] | 550 | /* paranoid */ verify( ready_schedule_islocked() ); |
---|
[8fc652e0] | 551 | /* paranoid */ verify( ! __preemption_enabled() ); |
---|
[1eb239e4] | 552 | |
---|
| 553 | return; |
---|
[64a7146] | 554 | } |
---|
[14a61b5] | 555 | |
---|
[64a7146] | 556 | // Unconditionnaly wake a thread |
---|
[1eb239e4] | 557 | void __wake_proc(processor * this) { |
---|
[64a7146] | 558 | __cfadbg_print_safe(runtime_core, "Kernel : waking Processor %p\n", this); |
---|
[14a61b5] | 559 | |
---|
[64a7146] | 560 | disable_interrupts(); |
---|
[8fc652e0] | 561 | /* paranoid */ verify( ! __preemption_enabled() ); |
---|
[58d64a4] | 562 | post( this->idle ); |
---|
[64a7146] | 563 | enable_interrupts( __cfaabi_dbg_ctx ); |
---|
[92e7631] | 564 | } |
---|
| 565 | |
---|
[1eb239e4] | 566 | static void push (__cluster_idles & this, processor & proc) { |
---|
[8fc652e0] | 567 | /* paranoid */ verify( ! __preemption_enabled() ); |
---|
[1eb239e4] | 568 | lock( this ); |
---|
| 569 | this.idle++; |
---|
| 570 | /* paranoid */ verify( this.idle <= this.total ); |
---|
[8e16177] | 571 | |
---|
[1eb239e4] | 572 | insert_first(this.list, proc); |
---|
| 573 | unlock( this ); |
---|
[8fc652e0] | 574 | /* paranoid */ verify( ! __preemption_enabled() ); |
---|
[1eb239e4] | 575 | } |
---|
[8e16177] | 576 | |
---|
[1eb239e4] | 577 | static void remove(__cluster_idles & this, processor & proc) { |
---|
[8fc652e0] | 578 | /* paranoid */ verify( ! __preemption_enabled() ); |
---|
[1eb239e4] | 579 | lock( this ); |
---|
| 580 | this.idle--; |
---|
| 581 | /* paranoid */ verify( this.idle >= 0 ); |
---|
[c34ebf2] | 582 | |
---|
[1eb239e4] | 583 | remove(proc); |
---|
| 584 | unlock( this ); |
---|
[8fc652e0] | 585 | /* paranoid */ verify( ! __preemption_enabled() ); |
---|
[1eb239e4] | 586 | } |
---|
[c34ebf2] | 587 | |
---|
[1eb239e4] | 588 | static [unsigned idle, unsigned total, * processor] query( & __cluster_idles this ) { |
---|
| 589 | for() { |
---|
| 590 | uint64_t l = __atomic_load_n(&this.lock, __ATOMIC_SEQ_CST); |
---|
| 591 | if( 1 == (l % 2) ) { Pause(); continue; } |
---|
| 592 | unsigned idle = this.idle; |
---|
| 593 | unsigned total = this.total; |
---|
| 594 | processor * proc = &this.list`first; |
---|
[7fdae38] | 595 | // Compiler fence is unnecessary, but gcc-8 and older incorrectly reorder code without it |
---|
| 596 | asm volatile("": : :"memory"); |
---|
[1eb239e4] | 597 | if(l != __atomic_load_n(&this.lock, __ATOMIC_SEQ_CST)) { Pause(); continue; } |
---|
| 598 | return [idle, total, proc]; |
---|
| 599 | } |
---|
[6b4cdd3] | 600 | } |
---|
| 601 | |
---|
[dbe9b08] | 602 | //============================================================================================= |
---|
| 603 | // Unexpected Terminating logic |
---|
| 604 | //============================================================================================= |
---|
[ea7d2b0] | 605 | static __spinlock_t kernel_abort_lock; |
---|
[9d944b2] | 606 | static bool kernel_abort_called = false; |
---|
| 607 | |
---|
[afd550c] | 608 | void * kernel_abort(void) __attribute__ ((__nothrow__)) { |
---|
[9d944b2] | 609 | // abort cannot be recursively entered by the same or different processors because all signal handlers return when |
---|
| 610 | // the globalAbort flag is true. |
---|
[36982fc] | 611 | lock( kernel_abort_lock __cfaabi_dbg_ctx2 ); |
---|
[9d944b2] | 612 | |
---|
| 613 | // first task to abort ? |
---|
[de94a60] | 614 | if ( kernel_abort_called ) { // not first task to abort ? |
---|
[ea7d2b0] | 615 | unlock( kernel_abort_lock ); |
---|
[1c273d0] | 616 | |
---|
[9d944b2] | 617 | sigset_t mask; |
---|
| 618 | sigemptyset( &mask ); |
---|
[de94a60] | 619 | sigaddset( &mask, SIGALRM ); // block SIGALRM signals |
---|
[8a13c47] | 620 | sigaddset( &mask, SIGUSR1 ); // block SIGALRM signals |
---|
| 621 | sigsuspend( &mask ); // block the processor to prevent further damage during abort |
---|
| 622 | _exit( EXIT_FAILURE ); // if processor unblocks before it is killed, terminate it |
---|
[de94a60] | 623 | } |
---|
| 624 | else { |
---|
| 625 | kernel_abort_called = true; |
---|
| 626 | unlock( kernel_abort_lock ); |
---|
[9d944b2] | 627 | } |
---|
| 628 | |
---|
[8fc652e0] | 629 | return __cfaabi_tls.this_thread; |
---|
[9d944b2] | 630 | } |
---|
| 631 | |
---|
| 632 | void kernel_abort_msg( void * kernel_data, char * abort_text, int abort_text_size ) { |
---|
[b81fd95] | 633 | $thread * thrd = ( $thread * ) kernel_data; |
---|
[9d944b2] | 634 | |
---|
[de94a60] | 635 | if(thrd) { |
---|
| 636 | int len = snprintf( abort_text, abort_text_size, "Error occurred while executing thread %.256s (%p)", thrd->self_cor.name, thrd ); |
---|
[1c40091] | 637 | __cfaabi_bits_write( STDERR_FILENO, abort_text, len ); |
---|
[de94a60] | 638 | |
---|
[212c2187] | 639 | if ( &thrd->self_cor != thrd->curr_cor ) { |
---|
| 640 | len = snprintf( abort_text, abort_text_size, " in coroutine %.256s (%p).\n", thrd->curr_cor->name, thrd->curr_cor ); |
---|
[1c40091] | 641 | __cfaabi_bits_write( STDERR_FILENO, abort_text, len ); |
---|
[de94a60] | 642 | } |
---|
| 643 | else { |
---|
[1c40091] | 644 | __cfaabi_bits_write( STDERR_FILENO, ".\n", 2 ); |
---|
[de94a60] | 645 | } |
---|
[1c273d0] | 646 | } |
---|
[9d944b2] | 647 | else { |
---|
[de94a60] | 648 | int len = snprintf( abort_text, abort_text_size, "Error occurred outside of any thread.\n" ); |
---|
[1c40091] | 649 | __cfaabi_bits_write( STDERR_FILENO, abort_text, len ); |
---|
[9d944b2] | 650 | } |
---|
| 651 | } |
---|
| 652 | |
---|
[2b8bc41] | 653 | int kernel_abort_lastframe( void ) __attribute__ ((__nothrow__)) { |
---|
[8fc652e0] | 654 | return get_coroutine(kernelTLS().this_thread) == get_coroutine(mainThread) ? 4 : 2; |
---|
[2b8bc41] | 655 | } |
---|
| 656 | |
---|
[de94a60] | 657 | static __spinlock_t kernel_debug_lock; |
---|
| 658 | |
---|
[9d944b2] | 659 | extern "C" { |
---|
[1c40091] | 660 | void __cfaabi_bits_acquire() { |
---|
[36982fc] | 661 | lock( kernel_debug_lock __cfaabi_dbg_ctx2 ); |
---|
[9d944b2] | 662 | } |
---|
| 663 | |
---|
[1c40091] | 664 | void __cfaabi_bits_release() { |
---|
[ea7d2b0] | 665 | unlock( kernel_debug_lock ); |
---|
[9d944b2] | 666 | } |
---|
[8118303] | 667 | } |
---|
| 668 | |
---|
[fa21ac9] | 669 | //============================================================================================= |
---|
| 670 | // Kernel Utilities |
---|
| 671 | //============================================================================================= |
---|
[bd98b58] | 672 | //----------------------------------------------------------------------------- |
---|
| 673 | // Locks |
---|
[242a902] | 674 | void ?{}( semaphore & this, int count = 1 ) { |
---|
| 675 | (this.lock){}; |
---|
| 676 | this.count = count; |
---|
| 677 | (this.waiting){}; |
---|
[db6f06a] | 678 | } |
---|
[242a902] | 679 | void ^?{}(semaphore & this) {} |
---|
[db6f06a] | 680 | |
---|
[71c8b7e] | 681 | bool P(semaphore & this) with( this ){ |
---|
[65deb18] | 682 | lock( lock __cfaabi_dbg_ctx2 ); |
---|
| 683 | count -= 1; |
---|
| 684 | if ( count < 0 ) { |
---|
[bdeba0b] | 685 | // queue current task |
---|
[8fc652e0] | 686 | append( waiting, active_thread() ); |
---|
[bdeba0b] | 687 | |
---|
| 688 | // atomically release spin lock and block |
---|
[3381ed7] | 689 | unlock( lock ); |
---|
[e235429] | 690 | park(); |
---|
[71c8b7e] | 691 | return true; |
---|
[8def349] | 692 | } |
---|
[4e6fb8e] | 693 | else { |
---|
[65deb18] | 694 | unlock( lock ); |
---|
[71c8b7e] | 695 | return false; |
---|
[4e6fb8e] | 696 | } |
---|
[bd98b58] | 697 | } |
---|
| 698 | |
---|
[f0ce5f4] | 699 | bool V(semaphore & this) with( this ) { |
---|
[ac2b598] | 700 | $thread * thrd = 0p; |
---|
[65deb18] | 701 | lock( lock __cfaabi_dbg_ctx2 ); |
---|
| 702 | count += 1; |
---|
| 703 | if ( count <= 0 ) { |
---|
[bdeba0b] | 704 | // remove task at head of waiting list |
---|
[65deb18] | 705 | thrd = pop_head( waiting ); |
---|
[bd98b58] | 706 | } |
---|
[bdeba0b] | 707 | |
---|
[65deb18] | 708 | unlock( lock ); |
---|
[bdeba0b] | 709 | |
---|
| 710 | // make new owner |
---|
[e235429] | 711 | unpark( thrd ); |
---|
[f0ce5f4] | 712 | |
---|
[d384787] | 713 | return thrd != 0p; |
---|
| 714 | } |
---|
| 715 | |
---|
| 716 | bool V(semaphore & this, unsigned diff) with( this ) { |
---|
| 717 | $thread * thrd = 0p; |
---|
| 718 | lock( lock __cfaabi_dbg_ctx2 ); |
---|
| 719 | int release = max(-count, (int)diff); |
---|
| 720 | count += diff; |
---|
| 721 | for(release) { |
---|
[e235429] | 722 | unpark( pop_head( waiting ) ); |
---|
[d384787] | 723 | } |
---|
| 724 | |
---|
| 725 | unlock( lock ); |
---|
| 726 | |
---|
[f0ce5f4] | 727 | return thrd != 0p; |
---|
[bd98b58] | 728 | } |
---|
| 729 | |
---|
[de94a60] | 730 | //----------------------------------------------------------------------------- |
---|
| 731 | // Debug |
---|
| 732 | __cfaabi_dbg_debug_do( |
---|
[1997b4e] | 733 | extern "C" { |
---|
[ae66348] | 734 | void __cfaabi_dbg_record_lock(__spinlock_t & this, const char prev_name[]) { |
---|
[1997b4e] | 735 | this.prev_name = prev_name; |
---|
[8fc652e0] | 736 | this.prev_thrd = kernelTLS().this_thread; |
---|
[1997b4e] | 737 | } |
---|
[9181f1d] | 738 | } |
---|
[f7d6bb0] | 739 | ) |
---|
[2026bb6] | 740 | |
---|
| 741 | //----------------------------------------------------------------------------- |
---|
| 742 | // Debug |
---|
[8c50aed] | 743 | bool threading_enabled(void) __attribute__((const)) { |
---|
[2026bb6] | 744 | return true; |
---|
| 745 | } |
---|
[c34ebf2] | 746 | |
---|
| 747 | //----------------------------------------------------------------------------- |
---|
| 748 | // Statistics |
---|
| 749 | #if !defined(__CFA_NO_STATISTICS__) |
---|
| 750 | void print_halts( processor & this ) { |
---|
| 751 | this.print_halts = true; |
---|
| 752 | } |
---|
[58688bf] | 753 | |
---|
| 754 | void print_stats_now( cluster & this, int flags ) { |
---|
[1b033b8] | 755 | __print_stats( this.stats, this.print_stats, "Cluster", this.name, (void*)&this ); |
---|
| 756 | } |
---|
| 757 | |
---|
| 758 | extern int __print_alarm_stats; |
---|
| 759 | void print_alarm_stats() { |
---|
| 760 | __print_alarm_stats = -1; |
---|
[58688bf] | 761 | } |
---|
[c34ebf2] | 762 | #endif |
---|
[8118303] | 763 | // Local Variables: // |
---|
| 764 | // mode: c // |
---|
| 765 | // tab-width: 4 // |
---|
| 766 | // End: // |
---|