1 /* context_raw - context switching with ucontextes from System V */
3 /* Copyright (c) 2009, 2010. The SimGrid Team.
4 * All rights reserved. */
6 /* This program is free software; you can redistribute it and/or modify it
7 * under the terms of the license (GNU LGPL) which comes with this package. */
9 #include "simix/private.h"
10 #include "xbt/parmap.h"
13 #ifdef HAVE_VALGRIND_VALGRIND_H
14 # include <valgrind/valgrind.h>
15 #endif /* HAVE_VALGRIND_VALGRIND_H */
18 #include "win32_ucontext.h"
19 #include "win32_ucontext.c"
24 typedef char * raw_stack_t;
25 typedef void (*rawctx_entry_point_t)(void *);
27 typedef struct s_smx_ctx_raw {
28 s_smx_ctx_base_t super; /* Fields of super implementation */
29 char *malloced_stack; /* malloced area containing the stack */
30 raw_stack_t stack_top; /* pointer to stack top (within previous area) */
31 raw_stack_t old_stack_top; /* to whom I should return the control */
32 #ifdef HAVE_VALGRIND_VALGRIND_H
33 unsigned int valgrind_stack_id; /* the valgrind stack id */
36 unsigned int thread; /* Just for measuring purposes */
38 } s_smx_ctx_raw_t, *smx_ctx_raw_t;
40 smx_ctx_raw_t maestro_raw_context;
42 extern raw_stack_t raw_makecontext(char* malloced_stack, int stack_size,
43 rawctx_entry_point_t entry_point, void* arg);
44 extern void raw_swapcontext(raw_stack_t* old, raw_stack_t new);
49 ".globl raw_makecontext\n"
50 ".type raw_makecontext,@function\n"
52 " movl 4(%esp),%eax\n" /* stack */
53 " addl 8(%esp),%eax\n" /* size */
54 " movl 12(%esp),%ecx\n" /* func */
55 " movl 16(%esp),%edx\n" /* arg */
56 " movl %edx, -4(%eax)\n"
57 " movl $0, -8(%eax)\n" /* @return for func */
58 " movl %ecx,-12(%eax)\n"
59 " movl $0, -16(%eax)\n" /* ebp */
60 " movl $0, -20(%eax)\n" /* ebx */
61 " movl $0, -24(%eax)\n" /* esi */
62 " movl $0, -28(%eax)\n" /* edi */
69 ".globl raw_swapcontext\n"
70 ".type raw_swapcontext,@function\n"
72 " movl 4(%esp),%eax\n" /* old */
73 " movl 8(%esp),%edx\n" /* new */
86 #elif PROCESSOR_x86_64
89 ".globl raw_makecontext\n"
90 ".type raw_makecontext,@function\n"
91 "raw_makecontext:\n" /* Calling convention sets the arguments in rdi, rsi, rdx and rcx, respectively */
92 " movq %rdi,%rax\n" /* stack */
93 " addq %rsi,%rax\n" /* size */
94 " movq $0, -8(%rax)\n" /* @return for func */
95 " movq %rdx,-16(%rax)\n" /* func */
96 " movq %rcx,-24(%rax)\n" /* arg/rdi */
97 " movq $0, -32(%rax)\n" /* rsi */
98 " movq $0, -40(%rax)\n" /* rdx */
99 " movq $0, -48(%rax)\n" /* rcx */
100 " movq $0, -56(%rax)\n" /* r8 */
101 " movq $0, -64(%rax)\n" /* r9 */
102 " movq $0, -72(%rax)\n" /* rbp */
103 " movq $0, -80(%rax)\n" /* rbx */
104 " movq $0, -88(%rax)\n" /* r12 */
105 " movq $0, -96(%rax)\n" /* r13 */
106 " movq $0, -104(%rax)\n" /* r14 */
107 " movq $0, -112(%rax)\n" /* r15 */
114 ".globl raw_swapcontext\n"
115 ".type raw_swapcontext,@function\n"
116 "raw_swapcontext:\n" /* Calling convention sets the arguments in rdi and rsi, respectively */
129 " movq %rsp,(%rdi)\n" /* old */
130 " movq %rsi,%rsp\n" /* new */
146 raw_stack_t raw_makecontext(char* malloced_stack, int stack_size,
147 rawctx_entry_point_t entry_point, void* arg) {
151 void raw_swapcontext(raw_stack_t* old, raw_stack_t new) {
157 XBT_LOG_EXTERNAL_DEFAULT_CATEGORY(simix_context);
159 #ifdef CONTEXT_THREADS
160 static xbt_parmap_t parmap;
163 static smx_context_factory_t raw_factory;
166 #include "xbt/xbt_os_time.h"
167 #define NUM_THREADS 4
168 static xbt_os_timer_t timer;
169 static double time_thread_sr[NUM_THREADS];
170 static double time_thread_ssr[NUM_THREADS];
171 static double time_wasted_sr = 0;
172 static double time_wasted_ssr = 0;
173 static unsigned int sr_count = 0;
174 static unsigned int ssr_count = 0;
175 static char new_sr = 0;
178 static void smx_ctx_raw_wrapper(smx_ctx_raw_t context);
180 static int smx_ctx_raw_factory_finalize(smx_context_factory_t *factory)
183 XBT_CRITICAL("Total wasted time in %u SR: %lf", sr_count, time_wasted_sr);
184 XBT_CRITICAL("Total wasted time in %u SSR: %lf", ssr_count, time_wasted_ssr);
187 #ifdef CONTEXT_THREADS
189 xbt_parmap_destroy(parmap);
191 return smx_ctx_base_factory_finalize(factory);
196 smx_ctx_raw_create_context(xbt_main_func_t code, int argc, char **argv,
197 void_pfn_smxprocess_t cleanup_func,
201 smx_ctx_raw_t context =
202 (smx_ctx_raw_t) smx_ctx_base_factory_create_context_sized(
203 sizeof(s_smx_ctx_raw_t),
210 /* If the user provided a function for the process then use it
211 otherwise is the context for maestro */
213 context->malloced_stack = xbt_malloc0(smx_context_stack_size);
215 raw_makecontext(context->malloced_stack, smx_context_stack_size,
216 (void(*)(void*))smx_ctx_raw_wrapper,context);
218 #ifdef HAVE_VALGRIND_VALGRIND_H
219 context->valgrind_stack_id =
220 VALGRIND_STACK_REGISTER(context->malloced_stack,
221 context->malloced_stack + smx_context_stack_size);
222 #endif /* HAVE_VALGRIND_VALGRIND_H */
225 maestro_raw_context = context;
228 return (smx_context_t) context;
231 static void smx_ctx_raw_free(smx_context_t context)
236 #ifdef HAVE_VALGRIND_VALGRIND_H
237 VALGRIND_STACK_DEREGISTER(((smx_ctx_raw_t)
238 context)->valgrind_stack_id);
239 #endif /* HAVE_VALGRIND_VALGRIND_H */
241 free(((smx_ctx_raw_t)context)->malloced_stack);
243 smx_ctx_base_free(context);
246 static void smx_ctx_raw_suspend(smx_context_t context)
248 smx_current_context = (smx_context_t)maestro_raw_context;
250 &((smx_ctx_raw_t) context)->stack_top,
251 ((smx_ctx_raw_t) context)->old_stack_top);
254 static void smx_ctx_raw_stop(smx_context_t context)
256 smx_ctx_base_stop(context);
257 smx_ctx_raw_suspend(context);
260 static void smx_ctx_raw_wrapper(smx_ctx_raw_t context)
262 (context->super.code) (context->super.argc, context->super.argv);
264 smx_ctx_raw_stop((smx_context_t) context);
267 static void smx_ctx_raw_resume(smx_process_t process)
269 smx_ctx_raw_t context = (smx_ctx_raw_t)process->context;
270 smx_current_context = (smx_context_t)context;
272 &((smx_ctx_raw_t) context)->old_stack_top,
273 ((smx_ctx_raw_t) context)->stack_top);
277 static void smx_ctx_raw_runall_serial(xbt_dynar_t processes)
279 smx_process_t process;
284 unsigned long num_proc = xbt_dynar_length(processes);
286 unsigned int data_size = (num_proc / NUM_THREADS) + ((num_proc % NUM_THREADS) ? 1 : 0);
289 time_thread_ssr[0] = 0;
290 xbt_dynar_foreach(processes, cursor, process) {
291 XBT_DEBUG("Schedule item %u of %lu",cursor,xbt_dynar_length(processes));
292 if(cursor >= t * data_size + data_size){
293 if(time_thread_ssr[t] > tmax)
294 tmax = time_thread_ssr[t];
296 time_thread_ssr[t] = 0;
300 ((smx_ctx_raw_t)process->context)->thread = t;
301 time_thread_sr[t] = 0;
304 xbt_os_timer_start(timer);
305 smx_ctx_raw_resume(process);
306 xbt_os_timer_stop(timer);
307 elapsed = xbt_os_timer_elapsed(timer);
308 time_thread_ssr[t] += elapsed;
309 time_thread_sr[((smx_ctx_raw_t)process->context)->thread] += elapsed;
315 if(time_thread_ssr[t] > tmax)
316 tmax = time_thread_ssr[t];
318 for(cursor=0; cursor <= t; cursor++){
319 XBT_VERB("Time SSR thread %u = %lf (max %lf)", cursor, time_thread_ssr[cursor], tmax);
320 time_wasted_ssr += tmax - time_thread_ssr[cursor];
323 xbt_dynar_reset(processes);
326 void smx_ctx_raw_new_sr(void);
327 void smx_ctx_raw_new_sr(void)
333 for(i=0; i < NUM_THREADS; i++){
334 if(time_thread_sr[i] > tmax)
335 tmax = time_thread_sr[i];
338 for(i=0; i < NUM_THREADS; i++){
339 XBT_VERB("Time SR thread %u = %lf (max %lf)", i, time_thread_sr[i], tmax);
340 time_wasted_sr += tmax - time_thread_sr[i];
343 XBT_VERB("New scheduling round");
346 static void smx_ctx_raw_runall_serial(xbt_dynar_t processes)
348 smx_process_t process;
351 xbt_dynar_foreach(processes, cursor, process) {
352 XBT_DEBUG("Schedule item %u of %lu",cursor,xbt_dynar_length(processes));
353 smx_ctx_raw_resume(process);
355 xbt_dynar_reset(processes);
359 static void smx_ctx_raw_runall_parallel(xbt_dynar_t processes)
361 #ifdef CONTEXT_THREADS
362 xbt_parmap_apply(parmap, (void_f_pvoid_t)smx_ctx_raw_resume, processes);
364 xbt_dynar_reset(processes);
367 static smx_context_t smx_ctx_raw_self_parallel(void)
369 return smx_current_context;
372 static int smx_ctx_raw_get_thread_id(){
373 return (int)(unsigned long)xbt_os_thread_get_extra_data();
376 static void smx_ctx_raw_runall(xbt_dynar_t processes)
378 if (xbt_dynar_length(processes) >= SIMIX_context_get_parallel_threshold()) {
379 XBT_DEBUG("Runall // %lu", xbt_dynar_length(processes));
380 raw_factory->self = smx_ctx_raw_self_parallel;
381 raw_factory->get_thread_id = smx_ctx_raw_get_thread_id;
382 smx_ctx_raw_runall_parallel(processes);
384 XBT_DEBUG("Runall serial %lu", xbt_dynar_length(processes));
385 raw_factory->self = smx_ctx_base_self;
386 raw_factory->get_thread_id = smx_ctx_base_get_thread_id;
387 smx_ctx_raw_runall_serial(processes);
391 void SIMIX_ctx_raw_factory_init(smx_context_factory_t *factory)
393 XBT_VERB("Using raw contexts. Because the glibc is just not good enough for us.");
394 smx_ctx_base_factory_init(factory);
396 (*factory)->finalize = smx_ctx_raw_factory_finalize;
397 (*factory)->create_context = smx_ctx_raw_create_context;
398 /* Do not overload that method (*factory)->finalize */
399 (*factory)->free = smx_ctx_raw_free;
400 (*factory)->stop = smx_ctx_raw_stop;
401 (*factory)->suspend = smx_ctx_raw_suspend;
402 (*factory)->name = "smx_raw_context_factory";
404 if (SIMIX_context_is_parallel()) {
405 #ifdef CONTEXT_THREADS
406 parmap = xbt_parmap_new(SIMIX_context_get_nthreads());
408 if (SIMIX_context_get_parallel_threshold() > 1) {
409 /* choose dynamically */
410 (*factory)->runall = smx_ctx_raw_runall;
413 /* always parallel */
414 (*factory)->self = smx_ctx_raw_self_parallel;
415 (*factory)->get_thread_id = smx_ctx_raw_get_thread_id;
416 (*factory)->runall = smx_ctx_raw_runall_parallel;
421 (*factory)->self = smx_ctx_base_self;
422 (*factory)->get_thread_id = smx_ctx_base_get_thread_id;
423 (*factory)->runall = smx_ctx_raw_runall_serial;
425 raw_factory = *factory;
427 timer = xbt_os_timer_new();