Rev 2040 | Rev 2068 | Go to most recent revision | Only display areas with differences | Ignore whitespace | Details | Blame | Last modification | View Log | RSS feed
Rev 2040 | Rev 2067 | ||
---|---|---|---|
1 | /* |
1 | /* |
2 | * Copyright (C) 2001-2004 Jakub Jermar |
2 | * Copyright (C) 2001-2007 Jakub Jermar |
3 | * All rights reserved. |
3 | * All rights reserved. |
4 | * |
4 | * |
5 | * Redistribution and use in source and binary forms, with or without |
5 | * Redistribution and use in source and binary forms, with or without |
6 | * modification, are permitted provided that the following conditions |
6 | * modification, are permitted provided that the following conditions |
7 | * are met: |
7 | * are met: |
8 | * |
8 | * |
9 | * - Redistributions of source code must retain the above copyright |
9 | * - Redistributions of source code must retain the above copyright |
10 | * notice, this list of conditions and the following disclaimer. |
10 | * notice, this list of conditions and the following disclaimer. |
11 | * - Redistributions in binary form must reproduce the above copyright |
11 | * - Redistributions in binary form must reproduce the above copyright |
12 | * notice, this list of conditions and the following disclaimer in the |
12 | * notice, this list of conditions and the following disclaimer in the |
13 | * documentation and/or other materials provided with the distribution. |
13 | * documentation and/or other materials provided with the distribution. |
14 | * - The name of the author may not be used to endorse or promote products |
14 | * - The name of the author may not be used to endorse or promote products |
15 | * derived from this software without specific prior written permission. |
15 | * derived from this software without specific prior written permission. |
16 | * |
16 | * |
17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
22 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
22 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
23 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
23 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
24 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
24 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
25 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
25 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
27 | */ |
27 | */ |
28 | 28 | ||
29 | /** @addtogroup genericproc |
29 | /** @addtogroup genericproc |
30 | * @{ |
30 | * @{ |
31 | */ |
31 | */ |
32 | 32 | ||
33 | /** |
33 | /** |
34 | * @file |
34 | * @file |
35 | * @brief Scheduler and load balancing. |
35 | * @brief Scheduler and load balancing. |
36 | * |
36 | * |
37 | * This file contains the scheduler and kcpulb kernel thread which |
37 | * This file contains the scheduler and kcpulb kernel thread which |
38 | * performs load-balancing of per-CPU run queues. |
38 | * performs load-balancing of per-CPU run queues. |
39 | */ |
39 | */ |
40 | 40 | ||
41 | #include <proc/scheduler.h> |
41 | #include <proc/scheduler.h> |
42 | #include <proc/thread.h> |
42 | #include <proc/thread.h> |
43 | #include <proc/task.h> |
43 | #include <proc/task.h> |
44 | #include <mm/frame.h> |
44 | #include <mm/frame.h> |
45 | #include <mm/page.h> |
45 | #include <mm/page.h> |
46 | #include <mm/as.h> |
46 | #include <mm/as.h> |
47 | #include <time/delay.h> |
47 | #include <time/delay.h> |
48 | #include <arch/asm.h> |
48 | #include <arch/asm.h> |
49 | #include <arch/faddr.h> |
49 | #include <arch/faddr.h> |
50 | #include <arch/cycle.h> |
50 | #include <arch/cycle.h> |
51 | #include <atomic.h> |
51 | #include <atomic.h> |
52 | #include <synch/spinlock.h> |
52 | #include <synch/spinlock.h> |
53 | #include <config.h> |
53 | #include <config.h> |
54 | #include <context.h> |
54 | #include <context.h> |
55 | #include <func.h> |
55 | #include <func.h> |
56 | #include <arch.h> |
56 | #include <arch.h> |
57 | #include <adt/list.h> |
57 | #include <adt/list.h> |
58 | #include <panic.h> |
58 | #include <panic.h> |
59 | #include <typedefs.h> |
59 | #include <typedefs.h> |
60 | #include <cpu.h> |
60 | #include <cpu.h> |
61 | #include <print.h> |
61 | #include <print.h> |
62 | #include <debug.h> |
62 | #include <debug.h> |
63 | 63 | ||
64 | static void before_task_runs(void); |
64 | static void before_task_runs(void); |
65 | static void before_thread_runs(void); |
65 | static void before_thread_runs(void); |
66 | static void after_thread_ran(void); |
66 | static void after_thread_ran(void); |
67 | static void scheduler_separated_stack(void); |
67 | static void scheduler_separated_stack(void); |
68 | 68 | ||
69 | atomic_t nrdy; /**< Number of ready threads in the system. */ |
69 | atomic_t nrdy; /**< Number of ready threads in the system. */ |
70 | 70 | ||
71 | /** Carry out actions before new task runs. */ |
71 | /** Carry out actions before new task runs. */ |
72 | void before_task_runs(void) |
72 | void before_task_runs(void) |
73 | { |
73 | { |
74 | before_task_runs_arch(); |
74 | before_task_runs_arch(); |
75 | } |
75 | } |
76 | 76 | ||
77 | /** Take actions before new thread runs. |
77 | /** Take actions before new thread runs. |
78 | * |
78 | * |
79 | * Perform actions that need to be |
79 | * Perform actions that need to be |
80 | * taken before the newly selected |
80 | * taken before the newly selected |
81 | * tread is passed control. |
81 | * tread is passed control. |
82 | * |
82 | * |
83 | * THREAD->lock is locked on entry |
83 | * THREAD->lock is locked on entry |
84 | * |
84 | * |
85 | */ |
85 | */ |
86 | void before_thread_runs(void) |
86 | void before_thread_runs(void) |
87 | { |
87 | { |
88 | before_thread_runs_arch(); |
88 | before_thread_runs_arch(); |
89 | #ifdef CONFIG_FPU_LAZY |
89 | #ifdef CONFIG_FPU_LAZY |
90 | if(THREAD == CPU->fpu_owner) |
90 | if(THREAD == CPU->fpu_owner) |
91 | fpu_enable(); |
91 | fpu_enable(); |
92 | else |
92 | else |
93 | fpu_disable(); |
93 | fpu_disable(); |
94 | #else |
94 | #else |
95 | fpu_enable(); |
95 | fpu_enable(); |
96 | if (THREAD->fpu_context_exists) |
96 | if (THREAD->fpu_context_exists) |
97 | fpu_context_restore(THREAD->saved_fpu_context); |
97 | fpu_context_restore(THREAD->saved_fpu_context); |
98 | else { |
98 | else { |
99 | fpu_init(); |
99 | fpu_init(); |
100 | THREAD->fpu_context_exists = 1; |
100 | THREAD->fpu_context_exists = 1; |
101 | } |
101 | } |
102 | #endif |
102 | #endif |
103 | } |
103 | } |
104 | 104 | ||
105 | /** Take actions after THREAD had run. |
105 | /** Take actions after THREAD had run. |
106 | * |
106 | * |
107 | * Perform actions that need to be |
107 | * Perform actions that need to be |
108 | * taken after the running thread |
108 | * taken after the running thread |
109 | * had been preempted by the scheduler. |
109 | * had been preempted by the scheduler. |
110 | * |
110 | * |
111 | * THREAD->lock is locked on entry |
111 | * THREAD->lock is locked on entry |
112 | * |
112 | * |
113 | */ |
113 | */ |
114 | void after_thread_ran(void) |
114 | void after_thread_ran(void) |
115 | { |
115 | { |
116 | after_thread_ran_arch(); |
116 | after_thread_ran_arch(); |
117 | } |
117 | } |
118 | 118 | ||
119 | #ifdef CONFIG_FPU_LAZY |
119 | #ifdef CONFIG_FPU_LAZY |
120 | void scheduler_fpu_lazy_request(void) |
120 | void scheduler_fpu_lazy_request(void) |
121 | { |
121 | { |
122 | restart: |
122 | restart: |
123 | fpu_enable(); |
123 | fpu_enable(); |
124 | spinlock_lock(&CPU->lock); |
124 | spinlock_lock(&CPU->lock); |
125 | 125 | ||
126 | /* Save old context */ |
126 | /* Save old context */ |
127 | if (CPU->fpu_owner != NULL) { |
127 | if (CPU->fpu_owner != NULL) { |
128 | spinlock_lock(&CPU->fpu_owner->lock); |
128 | spinlock_lock(&CPU->fpu_owner->lock); |
129 | fpu_context_save(CPU->fpu_owner->saved_fpu_context); |
129 | fpu_context_save(CPU->fpu_owner->saved_fpu_context); |
130 | /* don't prevent migration */ |
130 | /* don't prevent migration */ |
131 | CPU->fpu_owner->fpu_context_engaged = 0; |
131 | CPU->fpu_owner->fpu_context_engaged = 0; |
132 | spinlock_unlock(&CPU->fpu_owner->lock); |
132 | spinlock_unlock(&CPU->fpu_owner->lock); |
133 | CPU->fpu_owner = NULL; |
133 | CPU->fpu_owner = NULL; |
134 | } |
134 | } |
135 | 135 | ||
136 | spinlock_lock(&THREAD->lock); |
136 | spinlock_lock(&THREAD->lock); |
137 | if (THREAD->fpu_context_exists) { |
137 | if (THREAD->fpu_context_exists) { |
138 | fpu_context_restore(THREAD->saved_fpu_context); |
138 | fpu_context_restore(THREAD->saved_fpu_context); |
139 | } else { |
139 | } else { |
140 | /* Allocate FPU context */ |
140 | /* Allocate FPU context */ |
141 | if (!THREAD->saved_fpu_context) { |
141 | if (!THREAD->saved_fpu_context) { |
142 | /* Might sleep */ |
142 | /* Might sleep */ |
143 | spinlock_unlock(&THREAD->lock); |
143 | spinlock_unlock(&THREAD->lock); |
144 | spinlock_unlock(&CPU->lock); |
144 | spinlock_unlock(&CPU->lock); |
- | 145 | THREAD->saved_fpu_context = |
|
145 | THREAD->saved_fpu_context = slab_alloc(fpu_context_slab, 0); |
146 | slab_alloc(fpu_context_slab, 0); |
146 | /* We may have switched CPUs during slab_alloc */ |
147 | /* We may have switched CPUs during slab_alloc */ |
147 | goto restart; |
148 | goto restart; |
148 | } |
149 | } |
149 | fpu_init(); |
150 | fpu_init(); |
150 | THREAD->fpu_context_exists = 1; |
151 | THREAD->fpu_context_exists = 1; |
151 | } |
152 | } |
152 | CPU->fpu_owner = THREAD; |
153 | CPU->fpu_owner = THREAD; |
153 | THREAD->fpu_context_engaged = 1; |
154 | THREAD->fpu_context_engaged = 1; |
154 | spinlock_unlock(&THREAD->lock); |
155 | spinlock_unlock(&THREAD->lock); |
155 | 156 | ||
156 | spinlock_unlock(&CPU->lock); |
157 | spinlock_unlock(&CPU->lock); |
157 | } |
158 | } |
158 | #endif |
159 | #endif |
159 | 160 | ||
160 | /** Initialize scheduler |
161 | /** Initialize scheduler |
161 | * |
162 | * |
162 | * Initialize kernel scheduler. |
163 | * Initialize kernel scheduler. |
163 | * |
164 | * |
164 | */ |
165 | */ |
165 | void scheduler_init(void) |
166 | void scheduler_init(void) |
166 | { |
167 | { |
167 | } |
168 | } |
168 | 169 | ||
169 | /** Get thread to be scheduled |
170 | /** Get thread to be scheduled |
170 | * |
171 | * |
171 | * Get the optimal thread to be scheduled |
172 | * Get the optimal thread to be scheduled |
172 | * according to thread accounting and scheduler |
173 | * according to thread accounting and scheduler |
173 | * policy. |
174 | * policy. |
174 | * |
175 | * |
175 | * @return Thread to be scheduled. |
176 | * @return Thread to be scheduled. |
176 | * |
177 | * |
177 | */ |
178 | */ |
178 | static thread_t *find_best_thread(void) |
179 | static thread_t *find_best_thread(void) |
179 | { |
180 | { |
180 | thread_t *t; |
181 | thread_t *t; |
181 | runq_t *r; |
182 | runq_t *r; |
182 | int i; |
183 | int i; |
183 | 184 | ||
184 | ASSERT(CPU != NULL); |
185 | ASSERT(CPU != NULL); |
185 | 186 | ||
186 | loop: |
187 | loop: |
187 | interrupts_enable(); |
188 | interrupts_enable(); |
188 | 189 | ||
189 | if (atomic_get(&CPU->nrdy) == 0) { |
190 | if (atomic_get(&CPU->nrdy) == 0) { |
190 | /* |
191 | /* |
191 | * For there was nothing to run, the CPU goes to sleep |
192 | * For there was nothing to run, the CPU goes to sleep |
192 | * until a hardware interrupt or an IPI comes. |
193 | * until a hardware interrupt or an IPI comes. |
193 | * This improves energy saving and hyperthreading. |
194 | * This improves energy saving and hyperthreading. |
194 | */ |
195 | */ |
195 | 196 | ||
196 | /* |
197 | /* |
197 | * An interrupt might occur right now and wake up a thread. |
198 | * An interrupt might occur right now and wake up a thread. |
198 | * In such case, the CPU will continue to go to sleep |
199 | * In such case, the CPU will continue to go to sleep |
199 | * even though there is a runnable thread. |
200 | * even though there is a runnable thread. |
200 | */ |
201 | */ |
201 | 202 | ||
202 | cpu_sleep(); |
203 | cpu_sleep(); |
203 | goto loop; |
204 | goto loop; |
204 | } |
205 | } |
205 | 206 | ||
206 | interrupts_disable(); |
207 | interrupts_disable(); |
207 | 208 | ||
208 | for (i = 0; i<RQ_COUNT; i++) { |
209 | for (i = 0; i<RQ_COUNT; i++) { |
209 | r = &CPU->rq[i]; |
210 | r = &CPU->rq[i]; |
210 | spinlock_lock(&r->lock); |
211 | spinlock_lock(&r->lock); |
211 | if (r->n == 0) { |
212 | if (r->n == 0) { |
212 | /* |
213 | /* |
213 | * If this queue is empty, try a lower-priority queue. |
214 | * If this queue is empty, try a lower-priority queue. |
214 | */ |
215 | */ |
215 | spinlock_unlock(&r->lock); |
216 | spinlock_unlock(&r->lock); |
216 | continue; |
217 | continue; |
217 | } |
218 | } |
218 | 219 | ||
219 | atomic_dec(&CPU->nrdy); |
220 | atomic_dec(&CPU->nrdy); |
220 | atomic_dec(&nrdy); |
221 | atomic_dec(&nrdy); |
221 | r->n--; |
222 | r->n--; |
222 | 223 | ||
223 | /* |
224 | /* |
224 | * Take the first thread from the queue. |
225 | * Take the first thread from the queue. |
225 | */ |
226 | */ |
226 | t = list_get_instance(r->rq_head.next, thread_t, rq_link); |
227 | t = list_get_instance(r->rq_head.next, thread_t, rq_link); |
227 | list_remove(&t->rq_link); |
228 | list_remove(&t->rq_link); |
228 | 229 | ||
229 | spinlock_unlock(&r->lock); |
230 | spinlock_unlock(&r->lock); |
230 | 231 | ||
231 | spinlock_lock(&t->lock); |
232 | spinlock_lock(&t->lock); |
232 | t->cpu = CPU; |
233 | t->cpu = CPU; |
233 | 234 | ||
234 | t->ticks = us2ticks((i+1)*10000); |
235 | t->ticks = us2ticks((i + 1) * 10000); |
235 | t->priority = i; /* correct rq index */ |
236 | t->priority = i; /* correct rq index */ |
236 | 237 | ||
237 | /* |
238 | /* |
238 | * Clear the THREAD_FLAG_STOLEN flag so that t can be migrated |
239 | * Clear the THREAD_FLAG_STOLEN flag so that t can be migrated |
239 | * when load balancing needs emerge. |
240 | * when load balancing needs emerge. |
240 | */ |
241 | */ |
241 | t->flags &= ~THREAD_FLAG_STOLEN; |
242 | t->flags &= ~THREAD_FLAG_STOLEN; |
242 | spinlock_unlock(&t->lock); |
243 | spinlock_unlock(&t->lock); |
243 | 244 | ||
244 | return t; |
245 | return t; |
245 | } |
246 | } |
246 | goto loop; |
247 | goto loop; |
247 | 248 | ||
248 | } |
249 | } |
249 | 250 | ||
250 | /** Prevent rq starvation |
251 | /** Prevent rq starvation |
251 | * |
252 | * |
252 | * Prevent low priority threads from starving in rq's. |
253 | * Prevent low priority threads from starving in rq's. |
253 | * |
254 | * |
254 | * When the function decides to relink rq's, it reconnects |
255 | * When the function decides to relink rq's, it reconnects |
255 | * respective pointers so that in result threads with 'pri' |
256 | * respective pointers so that in result threads with 'pri' |
256 | * greater or equal start are moved to a higher-priority queue. |
257 | * greater or equal start are moved to a higher-priority queue. |
257 | * |
258 | * |
258 | * @param start Threshold priority. |
259 | * @param start Threshold priority. |
259 | * |
260 | * |
260 | */ |
261 | */ |
261 | static void relink_rq(int start) |
262 | static void relink_rq(int start) |
262 | { |
263 | { |
263 | link_t head; |
264 | link_t head; |
264 | runq_t *r; |
265 | runq_t *r; |
265 | int i, n; |
266 | int i, n; |
266 | 267 | ||
267 | list_initialize(&head); |
268 | list_initialize(&head); |
268 | spinlock_lock(&CPU->lock); |
269 | spinlock_lock(&CPU->lock); |
269 | if (CPU->needs_relink > NEEDS_RELINK_MAX) { |
270 | if (CPU->needs_relink > NEEDS_RELINK_MAX) { |
270 | for (i = start; i<RQ_COUNT-1; i++) { |
271 | for (i = start; i < RQ_COUNT - 1; i++) { |
271 | /* remember and empty rq[i + 1] */ |
272 | /* remember and empty rq[i + 1] */ |
272 | r = &CPU->rq[i + 1]; |
273 | r = &CPU->rq[i + 1]; |
273 | spinlock_lock(&r->lock); |
274 | spinlock_lock(&r->lock); |
274 | list_concat(&head, &r->rq_head); |
275 | list_concat(&head, &r->rq_head); |
275 | n = r->n; |
276 | n = r->n; |
276 | r->n = 0; |
277 | r->n = 0; |
277 | spinlock_unlock(&r->lock); |
278 | spinlock_unlock(&r->lock); |
278 | 279 | ||
279 | /* append rq[i + 1] to rq[i] */ |
280 | /* append rq[i + 1] to rq[i] */ |
280 | r = &CPU->rq[i]; |
281 | r = &CPU->rq[i]; |
281 | spinlock_lock(&r->lock); |
282 | spinlock_lock(&r->lock); |
282 | list_concat(&r->rq_head, &head); |
283 | list_concat(&r->rq_head, &head); |
283 | r->n += n; |
284 | r->n += n; |
284 | spinlock_unlock(&r->lock); |
285 | spinlock_unlock(&r->lock); |
285 | } |
286 | } |
286 | CPU->needs_relink = 0; |
287 | CPU->needs_relink = 0; |
287 | } |
288 | } |
288 | spinlock_unlock(&CPU->lock); |
289 | spinlock_unlock(&CPU->lock); |
289 | 290 | ||
290 | } |
291 | } |
291 | 292 | ||
292 | /** The scheduler |
293 | /** The scheduler |
293 | * |
294 | * |
294 | * The thread scheduling procedure. |
295 | * The thread scheduling procedure. |
295 | * Passes control directly to |
296 | * Passes control directly to |
296 | * scheduler_separated_stack(). |
297 | * scheduler_separated_stack(). |
297 | * |
298 | * |
298 | */ |
299 | */ |
299 | void scheduler(void) |
300 | void scheduler(void) |
300 | { |
301 | { |
301 | volatile ipl_t ipl; |
302 | volatile ipl_t ipl; |
302 | 303 | ||
303 | ASSERT(CPU != NULL); |
304 | ASSERT(CPU != NULL); |
304 | 305 | ||
305 | ipl = interrupts_disable(); |
306 | ipl = interrupts_disable(); |
306 | 307 | ||
307 | if (atomic_get(&haltstate)) |
308 | if (atomic_get(&haltstate)) |
308 | halt(); |
309 | halt(); |
309 | 310 | ||
310 | if (THREAD) { |
311 | if (THREAD) { |
311 | spinlock_lock(&THREAD->lock); |
312 | spinlock_lock(&THREAD->lock); |
312 | 313 | ||
313 | /* Update thread accounting */ |
314 | /* Update thread accounting */ |
314 | THREAD->cycles += get_cycle() - THREAD->last_cycle; |
315 | THREAD->cycles += get_cycle() - THREAD->last_cycle; |
315 | 316 | ||
316 | #ifndef CONFIG_FPU_LAZY |
317 | #ifndef CONFIG_FPU_LAZY |
317 | fpu_context_save(THREAD->saved_fpu_context); |
318 | fpu_context_save(THREAD->saved_fpu_context); |
318 | #endif |
319 | #endif |
319 | if (!context_save(&THREAD->saved_context)) { |
320 | if (!context_save(&THREAD->saved_context)) { |
320 | /* |
321 | /* |
321 | * This is the place where threads leave scheduler(); |
322 | * This is the place where threads leave scheduler(); |
322 | */ |
323 | */ |
323 | 324 | ||
324 | /* Save current CPU cycle */ |
325 | /* Save current CPU cycle */ |
325 | THREAD->last_cycle = get_cycle(); |
326 | THREAD->last_cycle = get_cycle(); |
326 | 327 | ||
327 | spinlock_unlock(&THREAD->lock); |
328 | spinlock_unlock(&THREAD->lock); |
328 | interrupts_restore(THREAD->saved_context.ipl); |
329 | interrupts_restore(THREAD->saved_context.ipl); |
329 | 330 | ||
330 | return; |
331 | return; |
331 | } |
332 | } |
332 | 333 | ||
333 | /* |
334 | /* |
334 | * Interrupt priority level of preempted thread is recorded here |
335 | * Interrupt priority level of preempted thread is recorded |
335 | * to facilitate scheduler() invocations from interrupts_disable()'d |
336 | * here to facilitate scheduler() invocations from |
336 | * code (e.g. waitq_sleep_timeout()). |
337 | * interrupts_disable()'d code (e.g. waitq_sleep_timeout()). |
337 | */ |
338 | */ |
338 | THREAD->saved_context.ipl = ipl; |
339 | THREAD->saved_context.ipl = ipl; |
339 | } |
340 | } |
340 | 341 | ||
341 | /* |
342 | /* |
342 | * Through the 'THE' structure, we keep track of THREAD, TASK, CPU, VM |
343 | * Through the 'THE' structure, we keep track of THREAD, TASK, CPU, VM |
343 | * and preemption counter. At this point THE could be coming either |
344 | * and preemption counter. At this point THE could be coming either |
344 | * from THREAD's or CPU's stack. |
345 | * from THREAD's or CPU's stack. |
345 | */ |
346 | */ |
346 | the_copy(THE, (the_t *) CPU->stack); |
347 | the_copy(THE, (the_t *) CPU->stack); |
347 | 348 | ||
348 | /* |
349 | /* |
349 | * We may not keep the old stack. |
350 | * We may not keep the old stack. |
350 | * Reason: If we kept the old stack and got blocked, for instance, in |
351 | * Reason: If we kept the old stack and got blocked, for instance, in |
351 | * find_best_thread(), the old thread could get rescheduled by another |
352 | * find_best_thread(), the old thread could get rescheduled by another |
352 | * CPU and overwrite the part of its own stack that was also used by |
353 | * CPU and overwrite the part of its own stack that was also used by |
353 | * the scheduler on this CPU. |
354 | * the scheduler on this CPU. |
354 | * |
355 | * |
355 | * Moreover, we have to bypass the compiler-generated POP sequence |
356 | * Moreover, we have to bypass the compiler-generated POP sequence |
356 | * which is fooled by SP being set to the very top of the stack. |
357 | * which is fooled by SP being set to the very top of the stack. |
357 | * Therefore the scheduler() function continues in |
358 | * Therefore the scheduler() function continues in |
358 | * scheduler_separated_stack(). |
359 | * scheduler_separated_stack(). |
359 | */ |
360 | */ |
360 | context_save(&CPU->saved_context); |
361 | context_save(&CPU->saved_context); |
361 | context_set(&CPU->saved_context, FADDR(scheduler_separated_stack), |
362 | context_set(&CPU->saved_context, FADDR(scheduler_separated_stack), |
362 | (uintptr_t) CPU->stack, CPU_STACK_SIZE); |
363 | (uintptr_t) CPU->stack, CPU_STACK_SIZE); |
363 | context_restore(&CPU->saved_context); |
364 | context_restore(&CPU->saved_context); |
364 | /* not reached */ |
365 | /* not reached */ |
365 | } |
366 | } |
366 | 367 | ||
367 | /** Scheduler stack switch wrapper |
368 | /** Scheduler stack switch wrapper |
368 | * |
369 | * |
369 | * Second part of the scheduler() function |
370 | * Second part of the scheduler() function |
370 | * using new stack. Handling the actual context |
371 | * using new stack. Handling the actual context |
371 | * switch to a new thread. |
372 | * switch to a new thread. |
372 | * |
373 | * |
373 | * Assume THREAD->lock is held. |
374 | * Assume THREAD->lock is held. |
374 | */ |
375 | */ |
375 | void scheduler_separated_stack(void) |
376 | void scheduler_separated_stack(void) |
376 | { |
377 | { |
377 | int priority; |
378 | int priority; |
378 | 379 | ||
379 | ASSERT(CPU != NULL); |
380 | ASSERT(CPU != NULL); |
380 | 381 | ||
381 | if (THREAD) { |
382 | if (THREAD) { |
382 | /* must be run after the switch to scheduler stack */ |
383 | /* must be run after the switch to scheduler stack */ |
383 | after_thread_ran(); |
384 | after_thread_ran(); |
384 | 385 | ||
385 | switch (THREAD->state) { |
386 | switch (THREAD->state) { |
386 | case Running: |
387 | case Running: |
387 | spinlock_unlock(&THREAD->lock); |
388 | spinlock_unlock(&THREAD->lock); |
388 | thread_ready(THREAD); |
389 | thread_ready(THREAD); |
389 | break; |
390 | break; |
390 | 391 | ||
391 | case Exiting: |
392 | case Exiting: |
392 | repeat: |
393 | repeat: |
393 | if (THREAD->detached) { |
394 | if (THREAD->detached) { |
394 | thread_destroy(THREAD); |
395 | thread_destroy(THREAD); |
395 | } else { |
396 | } else { |
396 | /* |
397 | /* |
397 | * The thread structure is kept allocated until somebody |
398 | * The thread structure is kept allocated until |
398 | * calls thread_detach() on it. |
399 | * somebody calls thread_detach() on it. |
399 | */ |
400 | */ |
400 | if (!spinlock_trylock(&THREAD->join_wq.lock)) { |
401 | if (!spinlock_trylock(&THREAD->join_wq.lock)) { |
401 | /* |
402 | /* |
402 | * Avoid deadlock. |
403 | * Avoid deadlock. |
403 | */ |
404 | */ |
404 | spinlock_unlock(&THREAD->lock); |
405 | spinlock_unlock(&THREAD->lock); |
405 | delay(10); |
406 | delay(10); |
406 | spinlock_lock(&THREAD->lock); |
407 | spinlock_lock(&THREAD->lock); |
407 | goto repeat; |
408 | goto repeat; |
408 | } |
409 | } |
409 | _waitq_wakeup_unsafe(&THREAD->join_wq, false); |
410 | _waitq_wakeup_unsafe(&THREAD->join_wq, false); |
410 | spinlock_unlock(&THREAD->join_wq.lock); |
411 | spinlock_unlock(&THREAD->join_wq.lock); |
411 | 412 | ||
412 | THREAD->state = Undead; |
413 | THREAD->state = Undead; |
413 | spinlock_unlock(&THREAD->lock); |
414 | spinlock_unlock(&THREAD->lock); |
414 | } |
415 | } |
415 | break; |
416 | break; |
416 | 417 | ||
417 | case Sleeping: |
418 | case Sleeping: |
418 | /* |
419 | /* |
419 | * Prefer the thread after it's woken up. |
420 | * Prefer the thread after it's woken up. |
420 | */ |
421 | */ |
421 | THREAD->priority = -1; |
422 | THREAD->priority = -1; |
422 | 423 | ||
423 | /* |
424 | /* |
424 | * We need to release wq->lock which we locked in waitq_sleep(). |
425 | * We need to release wq->lock which we locked in |
425 | * Address of wq->lock is kept in THREAD->sleep_queue. |
426 | * waitq_sleep(). Address of wq->lock is kept in |
- | 427 | * THREAD->sleep_queue. |
|
426 | */ |
428 | */ |
427 | spinlock_unlock(&THREAD->sleep_queue->lock); |
429 | spinlock_unlock(&THREAD->sleep_queue->lock); |
428 | 430 | ||
429 | /* |
431 | /* |
430 | * Check for possible requests for out-of-context invocation. |
432 | * Check for possible requests for out-of-context |
- | 433 | * invocation. |
|
431 | */ |
434 | */ |
432 | if (THREAD->call_me) { |
435 | if (THREAD->call_me) { |
433 | THREAD->call_me(THREAD->call_me_with); |
436 | THREAD->call_me(THREAD->call_me_with); |
434 | THREAD->call_me = NULL; |
437 | THREAD->call_me = NULL; |
435 | THREAD->call_me_with = NULL; |
438 | THREAD->call_me_with = NULL; |
436 | } |
439 | } |
437 | 440 | ||
438 | spinlock_unlock(&THREAD->lock); |
441 | spinlock_unlock(&THREAD->lock); |
439 | 442 | ||
440 | break; |
443 | break; |
441 | 444 | ||
442 | default: |
445 | default: |
443 | /* |
446 | /* |
444 | * Entering state is unexpected. |
447 | * Entering state is unexpected. |
445 | */ |
448 | */ |
446 | panic("tid%d: unexpected state %s\n", THREAD->tid, thread_states[THREAD->state]); |
449 | panic("tid%d: unexpected state %s\n", THREAD->tid, |
- | 450 | thread_states[THREAD->state]); |
|
447 | break; |
451 | break; |
448 | } |
452 | } |
449 | 453 | ||
450 | THREAD = NULL; |
454 | THREAD = NULL; |
451 | } |
455 | } |
452 | 456 | ||
453 | THREAD = find_best_thread(); |
457 | THREAD = find_best_thread(); |
454 | 458 | ||
455 | spinlock_lock(&THREAD->lock); |
459 | spinlock_lock(&THREAD->lock); |
456 | priority = THREAD->priority; |
460 | priority = THREAD->priority; |
457 | spinlock_unlock(&THREAD->lock); |
461 | spinlock_unlock(&THREAD->lock); |
458 | 462 | ||
459 | relink_rq(priority); |
463 | relink_rq(priority); |
460 | 464 | ||
461 | /* |
465 | /* |
462 | * If both the old and the new task are the same, lots of work is avoided. |
466 | * If both the old and the new task are the same, lots of work is |
- | 467 | * avoided. |
|
463 | */ |
468 | */ |
464 | if (TASK != THREAD->task) { |
469 | if (TASK != THREAD->task) { |
465 | as_t *as1 = NULL; |
470 | as_t *as1 = NULL; |
466 | as_t *as2; |
471 | as_t *as2; |
467 | 472 | ||
468 | if (TASK) { |
473 | if (TASK) { |
469 | spinlock_lock(&TASK->lock); |
474 | spinlock_lock(&TASK->lock); |
470 | as1 = TASK->as; |
475 | as1 = TASK->as; |
471 | spinlock_unlock(&TASK->lock); |
476 | spinlock_unlock(&TASK->lock); |
472 | } |
477 | } |
473 | 478 | ||
474 | spinlock_lock(&THREAD->task->lock); |
479 | spinlock_lock(&THREAD->task->lock); |
475 | as2 = THREAD->task->as; |
480 | as2 = THREAD->task->as; |
476 | spinlock_unlock(&THREAD->task->lock); |
481 | spinlock_unlock(&THREAD->task->lock); |
477 | 482 | ||
478 | /* |
483 | /* |
479 | * Note that it is possible for two tasks to share one address space. |
484 | * Note that it is possible for two tasks to share one address |
- | 485 | * space. |
|
480 | */ |
486 | */ |
481 | if (as1 != as2) { |
487 | if (as1 != as2) { |
482 | /* |
488 | /* |
483 | * Both tasks and address spaces are different. |
489 | * Both tasks and address spaces are different. |
484 | * Replace the old one with the new one. |
490 | * Replace the old one with the new one. |
485 | */ |
491 | */ |
486 | as_switch(as1, as2); |
492 | as_switch(as1, as2); |
487 | } |
493 | } |
488 | TASK = THREAD->task; |
494 | TASK = THREAD->task; |
489 | before_task_runs(); |
495 | before_task_runs(); |
490 | } |
496 | } |
491 | 497 | ||
492 | spinlock_lock(&THREAD->lock); |
498 | spinlock_lock(&THREAD->lock); |
493 | THREAD->state = Running; |
499 | THREAD->state = Running; |
494 | 500 | ||
495 | #ifdef SCHEDULER_VERBOSE |
501 | #ifdef SCHEDULER_VERBOSE |
496 | printf("cpu%d: tid %d (priority=%d,ticks=%lld,nrdy=%ld)\n", |
502 | printf("cpu%d: tid %d (priority=%d, ticks=%lld, nrdy=%ld)\n", |
497 | CPU->id, THREAD->tid, THREAD->priority, THREAD->ticks, atomic_get(&CPU->nrdy)); |
503 | CPU->id, THREAD->tid, THREAD->priority, THREAD->ticks, |
- | 504 | atomic_get(&CPU->nrdy)); |
|
498 | #endif |
505 | #endif |
499 | 506 | ||
500 | /* |
507 | /* |
501 | * Some architectures provide late kernel PA2KA(identity) |
508 | * Some architectures provide late kernel PA2KA(identity) |
502 | * mapping in a page fault handler. However, the page fault |
509 | * mapping in a page fault handler. However, the page fault |
503 | * handler uses the kernel stack of the running thread and |
510 | * handler uses the kernel stack of the running thread and |
504 | * therefore cannot be used to map it. The kernel stack, if |
511 | * therefore cannot be used to map it. The kernel stack, if |
505 | * necessary, is to be mapped in before_thread_runs(). This |
512 | * necessary, is to be mapped in before_thread_runs(). This |
506 | * function must be executed before the switch to the new stack. |
513 | * function must be executed before the switch to the new stack. |
507 | */ |
514 | */ |
508 | before_thread_runs(); |
515 | before_thread_runs(); |
509 | 516 | ||
510 | /* |
517 | /* |
511 | * Copy the knowledge of CPU, TASK, THREAD and preemption counter to thread's stack. |
518 | * Copy the knowledge of CPU, TASK, THREAD and preemption counter to |
- | 519 | * thread's stack. |
|
512 | */ |
520 | */ |
513 | the_copy(THE, (the_t *) THREAD->kstack); |
521 | the_copy(THE, (the_t *) THREAD->kstack); |
514 | 522 | ||
515 | context_restore(&THREAD->saved_context); |
523 | context_restore(&THREAD->saved_context); |
516 | /* not reached */ |
524 | /* not reached */ |
517 | } |
525 | } |
518 | 526 | ||
519 | #ifdef CONFIG_SMP |
527 | #ifdef CONFIG_SMP |
520 | /** Load balancing thread |
528 | /** Load balancing thread |
521 | * |
529 | * |
522 | * SMP load balancing thread, supervising thread supplies |
530 | * SMP load balancing thread, supervising thread supplies |
523 | * for the CPU it's wired to. |
531 | * for the CPU it's wired to. |
524 | * |
532 | * |
525 | * @param arg Generic thread argument (unused). |
533 | * @param arg Generic thread argument (unused). |
526 | * |
534 | * |
527 | */ |
535 | */ |
528 | void kcpulb(void *arg) |
536 | void kcpulb(void *arg) |
529 | { |
537 | { |
530 | thread_t *t; |
538 | thread_t *t; |
531 | int count, average, i, j, k = 0; |
539 | int count, average, i, j, k = 0; |
532 | ipl_t ipl; |
540 | ipl_t ipl; |
533 | 541 | ||
534 | /* |
542 | /* |
535 | * Detach kcpulb as nobody will call thread_join_timeout() on it. |
543 | * Detach kcpulb as nobody will call thread_join_timeout() on it. |
536 | */ |
544 | */ |
537 | thread_detach(THREAD); |
545 | thread_detach(THREAD); |
538 | 546 | ||
539 | loop: |
547 | loop: |
540 | /* |
548 | /* |
541 | * Work in 1s intervals. |
549 | * Work in 1s intervals. |
542 | */ |
550 | */ |
543 | thread_sleep(1); |
551 | thread_sleep(1); |
544 | 552 | ||
545 | not_satisfied: |
553 | not_satisfied: |
546 | /* |
554 | /* |
547 | * Calculate the number of threads that will be migrated/stolen from |
555 | * Calculate the number of threads that will be migrated/stolen from |
548 | * other CPU's. Note that situation can have changed between two |
556 | * other CPU's. Note that situation can have changed between two |
549 | * passes. Each time get the most up to date counts. |
557 | * passes. Each time get the most up to date counts. |
550 | */ |
558 | */ |
551 | average = atomic_get(&nrdy) / config.cpu_active + 1; |
559 | average = atomic_get(&nrdy) / config.cpu_active + 1; |
552 | count = average - atomic_get(&CPU->nrdy); |
560 | count = average - atomic_get(&CPU->nrdy); |
553 | 561 | ||
554 | if (count <= 0) |
562 | if (count <= 0) |
555 | goto satisfied; |
563 | goto satisfied; |
556 | 564 | ||
557 | /* |
565 | /* |
558 | * Searching least priority queues on all CPU's first and most priority queues on all CPU's last. |
566 | * Searching least priority queues on all CPU's first and most priority |
- | 567 | * queues on all CPU's last. |
|
559 | */ |
568 | */ |
560 | for (j=RQ_COUNT-1; j >= 0; j--) { |
569 | for (j= RQ_COUNT - 1; j >= 0; j--) { |
561 | for (i=0; i < config.cpu_active; i++) { |
570 | for (i = 0; i < config.cpu_active; i++) { |
562 | link_t *l; |
571 | link_t *l; |
563 | runq_t *r; |
572 | runq_t *r; |
564 | cpu_t *cpu; |
573 | cpu_t *cpu; |
565 | 574 | ||
566 | cpu = &cpus[(i + k) % config.cpu_active]; |
575 | cpu = &cpus[(i + k) % config.cpu_active]; |
567 | 576 | ||
568 | /* |
577 | /* |
569 | * Not interested in ourselves. |
578 | * Not interested in ourselves. |
570 | * Doesn't require interrupt disabling for kcpulb has THREAD_FLAG_WIRED. |
579 | * Doesn't require interrupt disabling for kcpulb has |
- | 580 | * THREAD_FLAG_WIRED. |
|
571 | */ |
581 | */ |
572 | if (CPU == cpu) |
582 | if (CPU == cpu) |
573 | continue; |
583 | continue; |
574 | if (atomic_get(&cpu->nrdy) <= average) |
584 | if (atomic_get(&cpu->nrdy) <= average) |
575 | continue; |
585 | continue; |
576 | 586 | ||
577 | ipl = interrupts_disable(); |
587 | ipl = interrupts_disable(); |
578 | r = &cpu->rq[j]; |
588 | r = &cpu->rq[j]; |
579 | spinlock_lock(&r->lock); |
589 | spinlock_lock(&r->lock); |
580 | if (r->n == 0) { |
590 | if (r->n == 0) { |
581 | spinlock_unlock(&r->lock); |
591 | spinlock_unlock(&r->lock); |
582 | interrupts_restore(ipl); |
592 | interrupts_restore(ipl); |
583 | continue; |
593 | continue; |
584 | } |
594 | } |
585 | 595 | ||
586 | t = NULL; |
596 | t = NULL; |
587 | l = r->rq_head.prev; /* search rq from the back */ |
597 | l = r->rq_head.prev; /* search rq from the back */ |
588 | while (l != &r->rq_head) { |
598 | while (l != &r->rq_head) { |
589 | t = list_get_instance(l, thread_t, rq_link); |
599 | t = list_get_instance(l, thread_t, rq_link); |
590 | /* |
600 | /* |
591 | * We don't want to steal CPU-wired threads neither threads already |
601 | * We don't want to steal CPU-wired threads |
- | 602 | * neither threads already stolen. The latter |
|
592 | * stolen. The latter prevents threads from migrating between CPU's |
603 | * prevents threads from migrating between CPU's |
593 | * without ever being run. We don't want to steal threads whose FPU |
604 | * without ever being run. We don't want to |
594 | * context is still in CPU. |
605 | * steal threads whose FPU context is still in |
- | 606 | * CPU. |
|
595 | */ |
607 | */ |
596 | spinlock_lock(&t->lock); |
608 | spinlock_lock(&t->lock); |
597 | if ((!(t->flags & (THREAD_FLAG_WIRED | THREAD_FLAG_STOLEN))) && |
609 | if ((!(t->flags & (THREAD_FLAG_WIRED | |
- | 610 | THREAD_FLAG_STOLEN))) && |
|
598 | (!(t->fpu_context_engaged)) ) { |
611 | (!(t->fpu_context_engaged)) ) { |
599 | /* |
612 | /* |
600 | * Remove t from r. |
613 | * Remove t from r. |
601 | */ |
614 | */ |
602 | spinlock_unlock(&t->lock); |
615 | spinlock_unlock(&t->lock); |
603 | 616 | ||
604 | atomic_dec(&cpu->nrdy); |
617 | atomic_dec(&cpu->nrdy); |
605 | atomic_dec(&nrdy); |
618 | atomic_dec(&nrdy); |
606 | 619 | ||
607 | r->n--; |
620 | r->n--; |
608 | list_remove(&t->rq_link); |
621 | list_remove(&t->rq_link); |
609 | 622 | ||
610 | break; |
623 | break; |
611 | } |
624 | } |
612 | spinlock_unlock(&t->lock); |
625 | spinlock_unlock(&t->lock); |
613 | l = l->prev; |
626 | l = l->prev; |
614 | t = NULL; |
627 | t = NULL; |
615 | } |
628 | } |
616 | spinlock_unlock(&r->lock); |
629 | spinlock_unlock(&r->lock); |
617 | 630 | ||
618 | if (t) { |
631 | if (t) { |
619 | /* |
632 | /* |
620 | * Ready t on local CPU |
633 | * Ready t on local CPU |
621 | */ |
634 | */ |
622 | spinlock_lock(&t->lock); |
635 | spinlock_lock(&t->lock); |
623 | #ifdef KCPULB_VERBOSE |
636 | #ifdef KCPULB_VERBOSE |
624 | printf("kcpulb%d: TID %d -> cpu%d, nrdy=%ld, avg=%nd\n", |
637 | printf("kcpulb%d: TID %d -> cpu%d, nrdy=%ld, " |
625 | CPU->id, t->tid, CPU->id, atomic_get(&CPU->nrdy), |
638 | "avg=%nd\n", CPU->id, t->tid, CPU->id, |
- | 639 | atomic_get(&CPU->nrdy), |
|
626 | atomic_get(&nrdy) / config.cpu_active); |
640 | atomic_get(&nrdy) / config.cpu_active); |
627 | #endif |
641 | #endif |
628 | t->flags |= THREAD_FLAG_STOLEN; |
642 | t->flags |= THREAD_FLAG_STOLEN; |
629 | t->state = Entering; |
643 | t->state = Entering; |
630 | spinlock_unlock(&t->lock); |
644 | spinlock_unlock(&t->lock); |
631 | 645 | ||
632 | thread_ready(t); |
646 | thread_ready(t); |
633 | 647 | ||
634 | interrupts_restore(ipl); |
648 | interrupts_restore(ipl); |
635 | 649 | ||
636 | if (--count == 0) |
650 | if (--count == 0) |
637 | goto satisfied; |
651 | goto satisfied; |
638 | 652 | ||
639 | /* |
653 | /* |
640 | * We are not satisfied yet, focus on another CPU next time. |
654 | * We are not satisfied yet, focus on another |
- | 655 | * CPU next time. |
|
641 | */ |
656 | */ |
642 | k++; |
657 | k++; |
643 | 658 | ||
644 | continue; |
659 | continue; |
645 | } |
660 | } |
646 | interrupts_restore(ipl); |
661 | interrupts_restore(ipl); |
647 | } |
662 | } |
648 | } |
663 | } |
649 | 664 | ||
650 | if (atomic_get(&CPU->nrdy)) { |
665 | if (atomic_get(&CPU->nrdy)) { |
651 | /* |
666 | /* |
652 | * Be a little bit light-weight and let migrated threads run. |
667 | * Be a little bit light-weight and let migrated threads run. |
653 | */ |
668 | */ |
654 | scheduler(); |
669 | scheduler(); |
655 | } else { |
670 | } else { |
656 | /* |
671 | /* |
657 | * We failed to migrate a single thread. |
672 | * We failed to migrate a single thread. |
658 | * Give up this turn. |
673 | * Give up this turn. |
659 | */ |
674 | */ |
660 | goto loop; |
675 | goto loop; |
661 | } |
676 | } |
662 | 677 | ||
663 | goto not_satisfied; |
678 | goto not_satisfied; |
664 | 679 | ||
665 | satisfied: |
680 | satisfied: |
666 | goto loop; |
681 | goto loop; |
667 | } |
682 | } |
668 | 683 | ||
669 | #endif /* CONFIG_SMP */ |
684 | #endif /* CONFIG_SMP */ |
670 | 685 | ||
671 | 686 | ||
672 | /** Print information about threads & scheduler queues */ |
687 | /** Print information about threads & scheduler queues */ |
673 | void sched_print_list(void) |
688 | void sched_print_list(void) |
674 | { |
689 | { |
675 | ipl_t ipl; |
690 | ipl_t ipl; |
676 | int cpu,i; |
691 | int cpu,i; |
677 | runq_t *r; |
692 | runq_t *r; |
678 | thread_t *t; |
693 | thread_t *t; |
679 | link_t *cur; |
694 | link_t *cur; |
680 | 695 | ||
681 | /* We are going to mess with scheduler structures, |
696 | /* We are going to mess with scheduler structures, |
682 | * let's not be interrupted */ |
697 | * let's not be interrupted */ |
683 | ipl = interrupts_disable(); |
698 | ipl = interrupts_disable(); |
684 | for (cpu=0;cpu < config.cpu_count; cpu++) { |
699 | for (cpu=0;cpu < config.cpu_count; cpu++) { |
685 | 700 | ||
686 | if (!cpus[cpu].active) |
701 | if (!cpus[cpu].active) |
687 | continue; |
702 | continue; |
688 | 703 | ||
689 | spinlock_lock(&cpus[cpu].lock); |
704 | spinlock_lock(&cpus[cpu].lock); |
690 | printf("cpu%d: address=%p, nrdy=%ld, needs_relink=%ld\n", |
705 | printf("cpu%d: address=%p, nrdy=%ld, needs_relink=%ld\n", |
691 | cpus[cpu].id, &cpus[cpu], atomic_get(&cpus[cpu].nrdy), cpus[cpu].needs_relink); |
706 | cpus[cpu].id, &cpus[cpu], atomic_get(&cpus[cpu].nrdy), |
- | 707 | cpus[cpu].needs_relink); |
|
692 | 708 | ||
693 | for (i=0; i<RQ_COUNT; i++) { |
709 | for (i = 0; i < RQ_COUNT; i++) { |
694 | r = &cpus[cpu].rq[i]; |
710 | r = &cpus[cpu].rq[i]; |
695 | spinlock_lock(&r->lock); |
711 | spinlock_lock(&r->lock); |
696 | if (!r->n) { |
712 | if (!r->n) { |
697 | spinlock_unlock(&r->lock); |
713 | spinlock_unlock(&r->lock); |
698 | continue; |
714 | continue; |
699 | } |
715 | } |
700 | printf("\trq[%d]: ", i); |
716 | printf("\trq[%d]: ", i); |
701 | for (cur=r->rq_head.next; cur!=&r->rq_head; cur=cur->next) { |
717 | for (cur = r->rq_head.next; cur != &r->rq_head; |
- | 718 | cur = cur->next) { |
|
702 | t = list_get_instance(cur, thread_t, rq_link); |
719 | t = list_get_instance(cur, thread_t, rq_link); |
703 | printf("%d(%s) ", t->tid, |
720 | printf("%d(%s) ", t->tid, |
704 | thread_states[t->state]); |
721 | thread_states[t->state]); |
705 | } |
722 | } |
706 | printf("\n"); |
723 | printf("\n"); |
707 | spinlock_unlock(&r->lock); |
724 | spinlock_unlock(&r->lock); |
708 | } |
725 | } |
709 | spinlock_unlock(&cpus[cpu].lock); |
726 | spinlock_unlock(&cpus[cpu].lock); |
710 | } |
727 | } |
711 | 728 | ||
712 | interrupts_restore(ipl); |
729 | interrupts_restore(ipl); |
713 | } |
730 | } |
714 | 731 | ||
715 | /** @} |
732 | /** @} |
716 | */ |
733 | */ |
717 | 734 |