-/* context_raw - fast context switching inspired from System V ucontextes */
+/* context_raw - fast context switching inspired from System V ucontexts */
-/* Copyright (c) 2009, 2010. The SimGrid Team.
+/* Copyright (c) 2009-2014. The SimGrid Team.
* All rights reserved. */
/* This program is free software; you can redistribute it and/or modify it
* under the terms of the license (GNU LGPL) which comes with this package. */
-#include "simix/private.h"
+#include "smx_private.h"
#include "xbt/parmap.h"
+#include "mc/mc.h"
#ifdef HAVE_VALGRIND_VALGRIND_H
# include <valgrind/valgrind.h>
#ifdef HAVE_VALGRIND_VALGRIND_H
unsigned int valgrind_stack_id; /* the valgrind stack id */
#endif
-#ifdef TIME_BENCH
+#ifdef TIME_BENCH_PER_SR
unsigned int thread; /* Just for measuring purposes */
#endif
} s_smx_ctx_raw_t, *smx_ctx_raw_t;
#ifdef CONTEXT_THREADS
static xbt_parmap_t raw_parmap;
-static raw_stack_t* raw_local_maestro_stacks; /* space to save maestro's stack in each thread */
+static smx_ctx_raw_t* raw_workers_context; /* space to save the worker context in each thread */
+static unsigned long raw_threads_working; /* number of threads that have started their work */
+static xbt_os_thread_key_t raw_worker_id_key; /* thread-specific storage for the thread id */
#endif
static unsigned long raw_process_index = 0; /* index of the next process to run in the
* list of runnable processes */
-smx_ctx_raw_t raw_maestro_context;
+static smx_ctx_raw_t raw_maestro_context;
extern raw_stack_t raw_makecontext(char* malloced_stack, int stack_size,
rawctx_entry_point_t entry_point, void* arg);
extern void raw_swapcontext(raw_stack_t* old, raw_stack_t new);
-#ifdef PROCESSOR_i686
+#if PROCESSOR_x86_64
+__asm__ (
+#if defined(APPLE)
+ ".text\n"
+ ".globl _raw_makecontext\n"
+ "_raw_makecontext:\n"
+#elif defined(_WIN32)
+ ".text\n"
+ ".globl raw_makecontext\n"
+ "raw_makecontext:\n"
+#else
+ ".text\n"
+ ".globl raw_makecontext\n"
+ ".type raw_makecontext,@function\n"
+ "raw_makecontext:\n"/* Calling convention sets the arguments in rdi, rsi, rdx and rcx, respectively */
+#endif
+ " mov %rdi,%rax\n" /* stack */
+ " add %rsi,%rax\n" /* size */
+ " movq $0, -8(%rax)\n" /* @return for func */
+ " mov %rdx,-16(%rax)\n" /* func */
+ " mov %rcx,-24(%rax)\n" /* arg/rdi */
+ " movq $0, -32(%rax)\n" /* rsi */
+ " movq $0, -40(%rax)\n" /* rdx */
+ " movq $0, -48(%rax)\n" /* rcx */
+ " movq $0, -56(%rax)\n" /* r8 */
+ " movq $0, -64(%rax)\n" /* r9 */
+ " movq $0, -72(%rax)\n" /* rbp */
+ " movq $0, -80(%rax)\n" /* rbx */
+ " movq $0, -88(%rax)\n" /* r12 */
+ " movq $0, -96(%rax)\n" /* r13 */
+ " movq $0, -104(%rax)\n" /* r14 */
+ " movq $0, -112(%rax)\n" /* r15 */
+ " sub $112,%rax\n"
+ " ret\n"
+);
+
+__asm__ (
+#if defined(APPLE)
+ ".text\n"
+ ".globl _raw_swapcontext\n"
+ "_raw_swapcontext:\n"
+#elif defined(_WIN32)
+ ".text\n"
+ ".globl raw_swapcontext\n"
+ "raw_swapcontext:\n"
+#else
+ ".text\n"
+ ".globl raw_swapcontext\n"
+ ".type raw_swapcontext,@function\n"
+ "raw_swapcontext:\n" /* Calling convention sets the arguments in rdi and rsi, respectively */
+#endif
+ " push %rdi\n"
+ " push %rsi\n"
+ " push %rdx\n"
+ " push %rcx\n"
+ " push %r8\n"
+ " push %r9\n"
+ " push %rbp\n"
+ " push %rbx\n"
+ " push %r12\n"
+ " push %r13\n"
+ " push %r14\n"
+ " push %r15\n"
+ " mov %rsp,(%rdi)\n" /* old */
+ " mov %rsi,%rsp\n" /* new */
+ " pop %r15\n"
+ " pop %r14\n"
+ " pop %r13\n"
+ " pop %r12\n"
+ " pop %rbx\n"
+ " pop %rbp\n"
+ " pop %r9\n"
+ " pop %r8\n"
+ " pop %rcx\n"
+ " pop %rdx\n"
+ " pop %rsi\n"
+ " pop %rdi\n"
+ " ret\n"
+);
+#elif PROCESSOR_i686
__asm__ (
#if defined(APPLE) || defined(_WIN32)
".text\n"
" popl %ebp\n"
" retl\n"
);
-#elif PROCESSOR_x86_64
-__asm__ (
-#if defined(APPLE) || defined(_WIN32)
- ".text\n"
- ".globl _raw_makecontext\n"
- "_raw_makecontext:\n"
#else
- ".text\n"
- ".globl raw_makecontext\n"
- ".type raw_makecontext,@function\n"
- "raw_makecontext:\n"/* Calling convention sets the arguments in rdi, rsi, rdx and rcx, respectively */
-#endif
- " movq %rdi,%rax\n" /* stack */
- " addq %rsi,%rax\n" /* size */
- " movq $0, -8(%rax)\n" /* @return for func */
- " movq %rdx,-16(%rax)\n" /* func */
- " movq %rcx,-24(%rax)\n" /* arg/rdi */
- " movq $0, -32(%rax)\n" /* rsi */
- " movq $0, -40(%rax)\n" /* rdx */
- " movq $0, -48(%rax)\n" /* rcx */
- " movq $0, -56(%rax)\n" /* r8 */
- " movq $0, -64(%rax)\n" /* r9 */
- " movq $0, -72(%rax)\n" /* rbp */
- " movq $0, -80(%rax)\n" /* rbx */
- " movq $0, -88(%rax)\n" /* r12 */
- " movq $0, -96(%rax)\n" /* r13 */
- " movq $0, -104(%rax)\n" /* r14 */
- " movq $0, -112(%rax)\n" /* r15 */
- " subq $112,%rax\n"
- " retq\n"
-);
-__asm__ (
-#if defined(APPLE) || defined(_WIN32)
- ".text\n"
- ".globl _raw_swapcontext\n"
- "_raw_swapcontext:\n"
-#else
- ".text\n"
- ".globl raw_swapcontext\n"
- ".type raw_swapcontext,@function\n"
- "raw_swapcontext:\n" /* Calling convention sets the arguments in rdi and rsi, respectively */
-#endif
- " pushq %rdi\n"
- " pushq %rsi\n"
- " pushq %rdx\n"
- " pushq %rcx\n"
- " pushq %r8\n"
- " pushq %r9\n"
- " pushq %rbp\n"
- " pushq %rbx\n"
- " pushq %r12\n"
- " pushq %r13\n"
- " pushq %r14\n"
- " pushq %r15\n"
- " movq %rsp,(%rdi)\n" /* old */
- " movq %rsi,%rsp\n" /* new */
- " popq %r15\n"
- " popq %r14\n"
- " popq %r13\n"
- " popq %r12\n"
- " popq %rbx\n"
- " popq %rbp\n"
- " popq %r9\n"
- " popq %r8\n"
- " popq %rcx\n"
- " popq %rdx\n"
- " popq %rsi\n"
- " popq %rdi\n"
- " retq\n"
-);
-#else
-/* If you implement raw contextes for other processors, don't forget to
+/* If you implement raw contexts for other processors, don't forget to
update the definition of HAVE_RAWCTX in buildtools/Cmake/CompleteInFiles.cmake */
raw_stack_t raw_makecontext(char* malloced_stack, int stack_size,
XBT_LOG_EXTERNAL_DEFAULT_CATEGORY(simix_context);
-#ifdef TIME_BENCH
+#ifdef TIME_BENCH_PER_SR
#include "xbt/xbt_os_time.h"
#define NUM_THREADS 4
static xbt_os_timer_t timer;
static void smx_ctx_raw_wrapper(smx_ctx_raw_t context);
static int smx_ctx_raw_factory_finalize(smx_context_factory_t *factory);
static smx_context_t smx_ctx_raw_create_context(xbt_main_func_t code, int argc,
- char **argv, void_pfn_smxprocess_t cleanup_func, void *data);
+ char **argv, void_pfn_smxprocess_t cleanup_func, smx_process_t process);
static void smx_ctx_raw_free(smx_context_t context);
static void smx_ctx_raw_wrapper(smx_ctx_raw_t context);
static void smx_ctx_raw_stop(smx_context_t context);
static void smx_ctx_raw_runall_parallel(void);
static void smx_ctx_raw_runall(void);
+/**
+ * \brief Initializes the raw context factory.
+ * \param factory where to initialize the factory
+ */
void SIMIX_ctx_raw_factory_init(smx_context_factory_t *factory)
{
+
XBT_VERB("Using raw contexts. Because the glibc is just not good enough for us.");
smx_ctx_base_factory_init(factory);
if (SIMIX_context_is_parallel()) {
#ifdef CONTEXT_THREADS
int nthreads = SIMIX_context_get_nthreads();
- raw_parmap = xbt_parmap_new(nthreads);
- raw_local_maestro_stacks = xbt_new(raw_stack_t, nthreads);
+ xbt_os_thread_key_create(&raw_worker_id_key);
+ raw_parmap = xbt_parmap_new(nthreads, SIMIX_context_get_parallel_mode());
+ raw_workers_context = xbt_new(smx_ctx_raw_t, nthreads);
+ raw_maestro_context=NULL;
+
#endif
if (SIMIX_context_get_parallel_threshold() > 1) {
/* choose dynamically */
(*factory)->runall = smx_ctx_raw_runall_serial;
(*factory)->suspend = smx_ctx_raw_suspend_serial;
}
-#ifdef TIME_BENCH
+#ifdef TIME_BENCH_PER_SR
timer = xbt_os_timer_new();
#endif
}
+/**
+ * \brief Finalizes the raw context factory.
+ * \param factory the raw context factory
+ */
static int smx_ctx_raw_factory_finalize(smx_context_factory_t *factory)
{
-#ifdef TIME_BENCH
- XBT_CRITICAL("Total wasted time in %u SR: %lf", sr_count, time_wasted_sr);
- XBT_CRITICAL("Total wasted time in %u SSR: %lf", ssr_count, time_wasted_ssr);
+#ifdef TIME_BENCH_PER_SR
+ XBT_CRITICAL("Total wasted time in %u SR: %f", sr_count, time_wasted_sr);
+ XBT_CRITICAL("Total wasted time in %u SSR: %f", ssr_count, time_wasted_ssr);
#endif
#ifdef CONTEXT_THREADS
if (raw_parmap)
xbt_parmap_destroy(raw_parmap);
- xbt_free(raw_local_maestro_stacks);
+ xbt_free(raw_workers_context);
#endif
return smx_ctx_base_factory_finalize(factory);
}
+/**
+ * \brief Creates a new raw context.
+ * \param code main function of this context or NULL to create the maestro
+ * context
+ * \param argc argument number
+ * \param argv arguments to pass to the main function
+ * \param cleanup_func a function to call to free the user data when the
+ * context finished
+ * \param process SIMIX process
+ */
static smx_context_t
smx_ctx_raw_create_context(xbt_main_func_t code, int argc, char **argv,
- void_pfn_smxprocess_t cleanup_func,
- void *data)
+ void_pfn_smxprocess_t cleanup_func,
+ smx_process_t process)
{
smx_ctx_raw_t context =
argc,
argv,
cleanup_func,
- data);
+ process);
/* if the user provided a function for the process then use it,
otherwise it is the context for maestro */
if (code) {
- context->malloced_stack = xbt_malloc0(smx_context_stack_size);
+ context->malloced_stack = SIMIX_context_stack_new();
context->stack_top =
raw_makecontext(context->malloced_stack, smx_context_stack_size,
- (void(*)(void*))smx_ctx_raw_wrapper,context);
+ (void_f_pvoid_t) smx_ctx_raw_wrapper, context);
#ifdef HAVE_VALGRIND_VALGRIND_H
context->valgrind_stack_id =
#endif /* HAVE_VALGRIND_VALGRIND_H */
} else {
- raw_maestro_context = context;
+ if(process != NULL && raw_maestro_context==NULL)
+ raw_maestro_context = context;
+
+ if(MC_is_active())
+ MC_ignore_heap(&(raw_maestro_context->stack_top), sizeof(raw_maestro_context->stack_top));
+
}
return (smx_context_t) context;
}
+/**
+ * \brief Destroys a raw context.
+ * \param context a raw context
+ */
static void smx_ctx_raw_free(smx_context_t context)
{
-
if (context) {
#ifdef HAVE_VALGRIND_VALGRIND_H
context)->valgrind_stack_id);
#endif /* HAVE_VALGRIND_VALGRIND_H */
- free(((smx_ctx_raw_t)context)->malloced_stack);
+ SIMIX_context_stack_delete(((smx_ctx_raw_t) context)->malloced_stack);
+
}
smx_ctx_base_free(context);
}
+/**
+ * \brief Wrapper for the main function of a context.
+ * \param context a raw context
+ */
static void smx_ctx_raw_wrapper(smx_ctx_raw_t context)
{
(context->super.code) (context->super.argc, context->super.argv);
smx_ctx_raw_stop((smx_context_t) context);
}
+/**
+ * \brief Stops a raw context.
+ *
+ * This function is called when the main function of the context if finished.
+ *
+ * \param context the current context
+ */
static void smx_ctx_raw_stop(smx_context_t context)
{
smx_ctx_base_stop(context);
simix_global->context_factory->suspend(context);
}
+/**
+ * \brief Suspends a running context and resumes another one or returns to
+ * maestro.
+ * \param context the current context
+ */
static void smx_ctx_raw_suspend_serial(smx_context_t context)
{
/* determine the next context */
/* execute the next process */
XBT_DEBUG("Run next process");
next_context = xbt_dynar_get_as(
- simix_global->process_to_run,i, smx_process_t)->context;
+ simix_global->process_to_run, i, smx_process_t)->context;
}
else {
/* all processes were run, return to maestro */
((smx_ctx_raw_t) next_context)->stack_top);
}
+/**
+ * \brief Resumes sequentially all processes ready to run.
+ * \param first_process the first process to resume
+ */
static void smx_ctx_raw_resume_serial(smx_process_t first_process)
{
smx_ctx_raw_t context = (smx_ctx_raw_t) first_process->context;
((smx_ctx_raw_t) context)->stack_top);
}
-#ifdef TIME_BENCH
+#ifdef TIME_BENCH_PER_SR
static void smx_ctx_raw_runall_serial(xbt_dynar_t processes)
{
smx_process_t process;
time_thread_sr[t] = 0;
}
- xbt_os_timer_start(timer);
+ xbt_os_cputimer_start(timer);
smx_ctx_raw_resume(process);
- xbt_os_timer_stop(timer);
+ xbt_os_cputimer_stop(timer);
elapsed = xbt_os_timer_elapsed(timer);
time_thread_ssr[t] += elapsed;
time_thread_sr[((smx_ctx_raw_t)process->context)->thread] += elapsed;
tmax = time_thread_ssr[t];
for(cursor=0; cursor <= t; cursor++){
- XBT_VERB("Time SSR thread %u = %lf (max %lf)", cursor, time_thread_ssr[cursor], tmax);
+ XBT_VERB("Time SSR thread %u = %f (max %f)", cursor, time_thread_ssr[cursor], tmax);
time_wasted_ssr += tmax - time_thread_ssr[cursor];
}
}
}
for(i=0; i < NUM_THREADS; i++){
- XBT_VERB("Time SR thread %u = %lf (max %lf)", i, time_thread_sr[i], tmax);
+ XBT_VERB("Time SR thread %u = %f (max %f)", i, time_thread_sr[i], tmax);
time_wasted_sr += tmax - time_thread_sr[i];
}
XBT_VERB("New scheduling round");
}
#else
+
+/**
+ * \brief Resumes sequentially all processes ready to run.
+ */
static void smx_ctx_raw_runall_serial(void)
{
- if (xbt_dynar_length(simix_global->process_to_run) > 0) {
- smx_process_t first_process =
- xbt_dynar_get_as(simix_global->process_to_run, 0, smx_process_t);
- raw_process_index = 1;
+ smx_process_t first_process =
+ xbt_dynar_get_as(simix_global->process_to_run, 0, smx_process_t);
+ raw_process_index = 1;
- /* execute the first process */
- smx_ctx_raw_resume_serial(first_process);
- }
+ /* execute the first process */
+ smx_ctx_raw_resume_serial(first_process);
}
#endif
-static void smx_ctx_raw_stop_parallel(smx_context_t context)
-{
- smx_ctx_base_stop(context);
- smx_ctx_raw_suspend_parallel(context);
-}
-
+/**
+ * \brief Suspends a running context and resumes another one or returns to
+ * the main function of the current worker thread.
+ * \param context the context of the current worker thread
+ */
static void smx_ctx_raw_suspend_parallel(smx_context_t context)
{
#ifdef CONTEXT_THREADS
else {
/* all processes were run, go to the barrier */
XBT_DEBUG("No more processes to run");
- next_context = (smx_context_t) raw_maestro_context;
- unsigned long worker_id = xbt_parmap_get_worker_id(raw_parmap);
- next_stack = raw_local_maestro_stacks[worker_id];
+
+ unsigned long worker_id =
+ (unsigned long) xbt_os_thread_get_specific(raw_worker_id_key);
+
+ next_context = (smx_context_t)raw_workers_context[worker_id];
+ XBT_DEBUG("Restoring worker stack %lu (working threads = %lu)",
+ worker_id, raw_threads_working);
+ next_stack = ((smx_ctx_raw_t)next_context)->stack_top;
}
SIMIX_context_set_current(next_context);
#endif
}
+/**
+ * \brief Resumes sequentially in the current worker thread the processes ready
+ * to run.
+ * \param first_process the first process to resume
+ */
static void smx_ctx_raw_resume_parallel(smx_process_t first_process)
{
#ifdef CONTEXT_THREADS
- unsigned long worker_id = xbt_parmap_get_worker_id(raw_parmap);
- raw_stack_t* local_maestro_stack = &raw_local_maestro_stacks[worker_id];
+ unsigned long worker_id = __sync_fetch_and_add(&raw_threads_working, 1);
+ xbt_os_thread_set_specific(raw_worker_id_key, (void*) worker_id);
+ smx_ctx_raw_t worker_context = (smx_ctx_raw_t)SIMIX_context_self();
+ raw_workers_context[worker_id] = worker_context;
+ XBT_DEBUG("Saving worker stack %lu", worker_id);
+ raw_stack_t* worker_stack = &(worker_context)->stack_top;
+
smx_context_t context = first_process->context;
SIMIX_context_set_current(context);
- raw_swapcontext(local_maestro_stack, ((smx_ctx_raw_t) context)->stack_top);
+ raw_swapcontext(worker_stack, ((smx_ctx_raw_t) context)->stack_top);
#endif
}
+/**
+ * \brief Resumes in parallel all processes ready to run.
+ */
static void smx_ctx_raw_runall_parallel(void)
{
#ifdef CONTEXT_THREADS
+ raw_threads_working = 0;
xbt_parmap_apply(raw_parmap, (void_f_pvoid_t) smx_ctx_raw_resume_parallel,
simix_global->process_to_run);
+#else
+ xbt_die("You asked for a parallel execution, but you don't have any threads.");
#endif
}
+/**
+ * \brief Resumes all processes ready to run.
+ */
static void smx_ctx_raw_runall(void)
{
unsigned long nb_processes = xbt_dynar_length(simix_global->process_to_run);
