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"
23 typedef char * raw_stack_t;
24 typedef void (*rawctx_entry_point_t)(void *);
26 typedef struct s_smx_ctx_raw {
27 s_smx_ctx_base_t super; /* Fields of super implementation */
28 char *malloced_stack; /* malloced area containing the stack */
29 raw_stack_t stack_top; /* pointer to stack top (within previous area) */
30 raw_stack_t old_stack_top; /* to whom I should return the control */
31 #ifdef HAVE_VALGRIND_VALGRIND_H
32 unsigned int valgrind_stack_id; /* the valgrind stack id */
35 unsigned int thread; /* Just for measuring purposes */
37 } s_smx_ctx_raw_t, *smx_ctx_raw_t;
39 smx_ctx_raw_t maestro_raw_context;
41 extern raw_stack_t raw_makecontext(char* malloced_stack, int stack_size,
42 rawctx_entry_point_t entry_point, void* arg);
43 extern void raw_swapcontext(raw_stack_t* old, raw_stack_t new);
48 ".globl raw_makecontext\n"
49 ".type raw_makecontext,@function\n"
51 " movl 4(%esp),%eax\n" /* stack */
52 " addl 8(%esp),%eax\n" /* size */
53 " movl 12(%esp),%ecx\n" /* func */
54 " movl 16(%esp),%edx\n" /* arg */
55 " movl %edx, -4(%eax)\n"
56 " movl $0, -8(%eax)\n" /* @return for func */
57 " movl %ecx,-12(%eax)\n"
58 " movl $0, -16(%eax)\n" /* ebp */
59 " movl $0, -20(%eax)\n" /* ebx */
60 " movl $0, -24(%eax)\n" /* esi */
61 " movl $0, -28(%eax)\n" /* edi */
68 ".globl raw_swapcontext\n"
69 ".type raw_swapcontext,@function\n"
71 " movl 4(%esp),%eax\n" /* old */
72 " movl 8(%esp),%edx\n" /* new */
85 #elif PROCESSOR_x86_64
88 ".globl raw_makecontext\n"
89 ".type raw_makecontext,@function\n"
90 "raw_makecontext:\n" /* Calling convention sets the arguments in rdi, rsi, rdx and rcx, respectively */
91 " movq %rdi,%rax\n" /* stack */
92 " addq %rsi,%rax\n" /* size */
93 " movq $0, -8(%rax)\n" /* @return for func */
94 " movq %rdx,-16(%rax)\n" /* func */
95 " movq %rcx,-24(%rax)\n" /* arg/rdi */
96 " movq $0, -32(%rax)\n" /* rsi */
97 " movq $0, -40(%rax)\n" /* rdx */
98 " movq $0, -48(%rax)\n" /* rcx */
99 " movq $0, -56(%rax)\n" /* r8 */
100 " movq $0, -64(%rax)\n" /* r9 */
101 " movq $0, -72(%rax)\n" /* rbp */
102 " movq $0, -80(%rax)\n" /* rbx */
103 " movq $0, -88(%rax)\n" /* r12 */
104 " movq $0, -96(%rax)\n" /* r13 */
105 " movq $0, -104(%rax)\n" /* r14 */
106 " movq $0, -112(%rax)\n" /* r15 */
113 ".globl raw_swapcontext\n"
114 ".type raw_swapcontext,@function\n"
115 "raw_swapcontext:\n" /* Calling convention sets the arguments in rdi and rsi, respectively */
128 " movq %rsp,(%rdi)\n" /* old */
129 " movq %rsi,%rsp\n" /* new */
145 raw_stack_t raw_makecontext(char* malloced_stack, int stack_size,
146 rawctx_entry_point_t entry_point, void* arg) {
150 void raw_swapcontext(raw_stack_t* old, raw_stack_t new) {
156 XBT_LOG_EXTERNAL_DEFAULT_CATEGORY(simix_context);
158 #ifdef CONTEXT_THREADS
159 static xbt_parmap_t parmap;
162 static smx_context_factory_t raw_factory;
165 #include "xbt/xbt_os_time.h"
166 #define NUM_THREADS 4
167 static xbt_os_timer_t timer;
168 static double time_thread_sr[NUM_THREADS];
169 static double time_thread_ssr[NUM_THREADS];
170 static double time_wasted_sr = 0;
171 static double time_wasted_ssr = 0;
172 static unsigned int sr_count = 0;
173 static unsigned int ssr_count = 0;
174 static char new_sr = 0;
177 static void smx_ctx_raw_wrapper(smx_ctx_raw_t context);
179 static int smx_ctx_raw_factory_finalize(smx_context_factory_t *factory)
182 XBT_CRITICAL("Total wasted time in %u SR: %lf", sr_count, time_wasted_sr);
183 XBT_CRITICAL("Total wasted time in %u SSR: %lf", ssr_count, time_wasted_ssr);
186 #ifdef CONTEXT_THREADS
188 xbt_parmap_destroy(parmap);
190 return smx_ctx_base_factory_finalize(factory);
195 smx_ctx_raw_create_context(xbt_main_func_t code, int argc, char **argv,
196 void_pfn_smxprocess_t cleanup_func,
200 smx_ctx_raw_t context =
201 (smx_ctx_raw_t) smx_ctx_base_factory_create_context_sized(
202 sizeof(s_smx_ctx_raw_t),
209 /* If the user provided a function for the process then use it
210 otherwise is the context for maestro */
212 context->malloced_stack = xbt_malloc0(smx_context_stack_size);
214 raw_makecontext(context->malloced_stack, smx_context_stack_size,
215 (void(*)(void*))smx_ctx_raw_wrapper,context);
217 #ifdef HAVE_VALGRIND_VALGRIND_H
218 context->valgrind_stack_id =
219 VALGRIND_STACK_REGISTER(context->malloced_stack,
220 context->malloced_stack + smx_context_stack_size);
221 #endif /* HAVE_VALGRIND_VALGRIND_H */
224 maestro_raw_context = context;
227 return (smx_context_t) context;
230 static void smx_ctx_raw_free(smx_context_t context)
235 #ifdef HAVE_VALGRIND_VALGRIND_H
236 VALGRIND_STACK_DEREGISTER(((smx_ctx_raw_t)
237 context)->valgrind_stack_id);
238 #endif /* HAVE_VALGRIND_VALGRIND_H */
240 free(((smx_ctx_raw_t)context)->malloced_stack);
242 smx_ctx_base_free(context);
245 static void smx_ctx_raw_suspend(smx_context_t context)
247 smx_current_context = (smx_context_t)maestro_raw_context;
249 &((smx_ctx_raw_t) context)->stack_top,
250 ((smx_ctx_raw_t) context)->old_stack_top);
253 static void smx_ctx_raw_stop(smx_context_t context)
255 smx_ctx_base_stop(context);
256 smx_ctx_raw_suspend(context);
259 static void smx_ctx_raw_wrapper(smx_ctx_raw_t context)
261 (context->super.code) (context->super.argc, context->super.argv);
263 smx_ctx_raw_stop((smx_context_t) context);
266 static void smx_ctx_raw_resume(smx_process_t process)
268 smx_ctx_raw_t context = (smx_ctx_raw_t)process->context;
269 smx_current_context = (smx_context_t)context;
271 &((smx_ctx_raw_t) context)->old_stack_top,
272 ((smx_ctx_raw_t) context)->stack_top);
276 static void smx_ctx_raw_runall_serial(xbt_dynar_t processes)
278 smx_process_t process;
283 unsigned long num_proc = xbt_dynar_length(processes);
285 unsigned int data_size = (num_proc / NUM_THREADS) + ((num_proc % NUM_THREADS) ? 1 : 0);
288 time_thread_ssr[0] = 0;
289 xbt_dynar_foreach(processes, cursor, process) {
290 XBT_DEBUG("Schedule item %u of %lu",cursor,xbt_dynar_length(processes));
291 if(cursor >= t * data_size + data_size){
292 if(time_thread_ssr[t] > tmax)
293 tmax = time_thread_ssr[t];
295 time_thread_ssr[t] = 0;
299 ((smx_ctx_raw_t)process->context)->thread = t;
300 time_thread_sr[t] = 0;
303 xbt_os_timer_start(timer);
304 smx_ctx_raw_resume(process);
305 xbt_os_timer_stop(timer);
306 elapsed = xbt_os_timer_elapsed(timer);
307 time_thread_ssr[t] += elapsed;
308 time_thread_sr[((smx_ctx_raw_t)process->context)->thread] += elapsed;
314 if(time_thread_ssr[t] > tmax)
315 tmax = time_thread_ssr[t];
317 for(cursor=0; cursor <= t; cursor++){
318 XBT_VERB("Time SSR thread %u = %lf (max %lf)", cursor, time_thread_ssr[cursor], tmax);
319 time_wasted_ssr += tmax - time_thread_ssr[cursor];
322 xbt_dynar_reset(processes);
325 void smx_ctx_raw_new_sr(void);
326 void smx_ctx_raw_new_sr(void)
332 for(i=0; i < NUM_THREADS; i++){
333 if(time_thread_sr[i] > tmax)
334 tmax = time_thread_sr[i];
337 for(i=0; i < NUM_THREADS; i++){
338 XBT_VERB("Time SR thread %u = %lf (max %lf)", i, time_thread_sr[i], tmax);
339 time_wasted_sr += tmax - time_thread_sr[i];
342 XBT_VERB("New scheduling round");
345 static void smx_ctx_raw_runall_serial(xbt_dynar_t processes)
347 smx_process_t process;
350 xbt_dynar_foreach(processes, cursor, process) {
351 XBT_DEBUG("Schedule item %u of %lu",cursor,xbt_dynar_length(processes));
352 smx_ctx_raw_resume(process);
354 xbt_dynar_reset(processes);
358 static void smx_ctx_raw_runall_parallel(xbt_dynar_t processes)
360 #ifdef CONTEXT_THREADS
361 xbt_parmap_apply(parmap, (void_f_pvoid_t)smx_ctx_raw_resume, processes);
363 xbt_dynar_reset(processes);
366 static smx_context_t smx_ctx_raw_self_parallel(void)
368 return smx_current_context;
371 static int smx_ctx_raw_get_thread_id(){
372 return (int)(unsigned long)xbt_os_thread_get_extra_data();
375 static void smx_ctx_raw_runall(xbt_dynar_t processes)
377 if (xbt_dynar_length(processes) >= SIMIX_context_get_parallel_threshold()) {
378 XBT_DEBUG("Runall // %lu", xbt_dynar_length(processes));
379 raw_factory->self = smx_ctx_raw_self_parallel;
380 raw_factory->get_thread_id = smx_ctx_raw_get_thread_id;
381 smx_ctx_raw_runall_parallel(processes);
383 XBT_DEBUG("Runall serial %lu", xbt_dynar_length(processes));
384 raw_factory->self = smx_ctx_base_self;
385 raw_factory->get_thread_id = smx_ctx_base_get_thread_id;
386 smx_ctx_raw_runall_serial(processes);
390 void SIMIX_ctx_raw_factory_init(smx_context_factory_t *factory)
392 XBT_VERB("Using raw contexts. Because the glibc is just not good enough for us.");
393 smx_ctx_base_factory_init(factory);
395 (*factory)->finalize = smx_ctx_raw_factory_finalize;
396 (*factory)->create_context = smx_ctx_raw_create_context;
397 /* Do not overload that method (*factory)->finalize */
398 (*factory)->free = smx_ctx_raw_free;
399 (*factory)->stop = smx_ctx_raw_stop;
400 (*factory)->suspend = smx_ctx_raw_suspend;
401 (*factory)->name = "smx_raw_context_factory";
403 if (SIMIX_context_is_parallel()) {
404 #ifdef CONTEXT_THREADS
405 parmap = xbt_parmap_new(SIMIX_context_get_nthreads());
407 if (SIMIX_context_get_parallel_threshold() > 1) {
408 /* choose dynamically */
409 (*factory)->runall = smx_ctx_raw_runall;
412 /* always parallel */
413 (*factory)->self = smx_ctx_raw_self_parallel;
414 (*factory)->get_thread_id = smx_ctx_raw_get_thread_id;
415 (*factory)->runall = smx_ctx_raw_runall_parallel;
420 (*factory)->self = smx_ctx_base_self;
421 (*factory)->get_thread_id = smx_ctx_base_get_thread_id;
422 (*factory)->runall = smx_ctx_raw_runall_serial;
424 raw_factory = *factory;
426 timer = xbt_os_timer_new();