X-Git-Url: http://info.iut-bm.univ-fcomte.fr/pub/gitweb/simgrid.git/blobdiff_plain/49e85177c669d793e84242983a1b1f430e47184e..bfc956026c22595af39ca5c73b7e250e16d85aea:/src/smpi/smpi_bench.c diff --git a/src/smpi/smpi_bench.c b/src/smpi/smpi_bench.c index 9387099b8c..d35c50c8d9 100644 --- a/src/smpi/smpi_bench.c +++ b/src/smpi/smpi_bench.c @@ -4,6 +4,7 @@ /* 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 "internal_config.h" #include "private.h" #include "xbt/dict.h" #include "xbt/sysdep.h" @@ -24,6 +25,10 @@ #include #include +#ifndef MAP_ANONYMOUS +#define MAP_ANONYMOUS MAP_ANON +#endif + XBT_LOG_NEW_DEFAULT_SUBCATEGORY(smpi_bench, smpi, "Logging specific to SMPI (benchmarking)"); @@ -64,11 +69,17 @@ xbt_dict_t allocs = NULL; /* Allocated on first use */ xbt_dict_t allocs_metadata = NULL; /* Allocated on first use */ xbt_dict_t samples = NULL; /* Allocated on first use */ xbt_dict_t calls = NULL; /* Allocated on first use */ -__thread int smpi_current_rank = 0; /* Updated after each MPI call */ double smpi_cpu_threshold; double smpi_running_power; +int smpi_loaded_page = -1; +char* start_data_exe = NULL; +int size_data_exe = 0; +int smpi_privatize_global_variables; + +smpi_privatisation_region_t smpi_privatisation_regions; + typedef struct { int fd; int count; @@ -106,7 +117,7 @@ static void* shm_map(int fd, size_t size, shared_data_t* data) { xbt_die("Could not map fd %d: %s", fd, strerror(errno)); } if(!allocs_metadata) { - allocs_metadata = xbt_dict_new_homogeneous(xbt_free); + allocs_metadata = xbt_dict_new_homogeneous(xbt_free_f); } snprintf(loc, PTR_STRLEN, "%p", mem); meta = xbt_new(shared_metadata_t, 1); @@ -174,44 +185,65 @@ void smpi_execute(double duration) } } +void smpi_switch_data_segment(int dest); + void smpi_bench_begin(void) { + smpi_switch_data_segment(smpi_process_index()); xbt_os_threadtimer_start(smpi_process_timer()); - smpi_current_rank = smpi_process_index(); } void smpi_bench_end(void) { xbt_os_timer_t timer = smpi_process_timer(); xbt_os_threadtimer_stop(timer); +// smpi_switch_data_segment(smpi_process_count()); if (smpi_process_get_sampling()) { XBT_CRITICAL("Cannot do recursive benchmarks."); XBT_CRITICAL("Are you trying to make a call to MPI within a SMPI_SAMPLE_ block?"); xbt_backtrace_display_current(); xbt_die("Aborting."); } - smpi_execute(xbt_os_timer_elapsed(timer)); + // Simulate the benchmarked computation unless disabled via command-line argument + if (sg_cfg_get_boolean("smpi/simulate_computation")) { + smpi_execute(xbt_os_timer_elapsed(timer)); + } } -unsigned int smpi_sleep(unsigned int secs) +/* Private sleep function used by smpi_sleep() and smpi_usleep() */ +static unsigned int private_sleep(double secs) { - smx_action_t action; - smpi_bench_end(); - double flops = (double) secs*simcall_host_get_speed(SIMIX_host_self()); - XBT_DEBUG("Sleep for: %f flops", flops); - action = simcall_host_execute("computation", SIMIX_host_self(), flops, 1, 0, 0); + XBT_DEBUG("Sleep for: %lf secs", secs); #ifdef HAVE_TRACING - simcall_set_category (action, TRACE_internal_smpi_get_category()); - #endif - simcall_host_execution_wait(action); + int rank = smpi_comm_rank(MPI_COMM_WORLD); + instr_extra_data extra = xbt_new0(s_instr_extra_data_t,1); + extra->type=TRACING_SLEEPING; + extra->sleep_duration=secs; + TRACE_smpi_sleeping_in(rank, extra); +#endif + simcall_process_sleep(secs); +#ifdef HAVE_TRACING + TRACE_smpi_sleeping_out(rank); +#endif smpi_bench_begin(); - return secs; + return 0; +} + +unsigned int smpi_sleep(unsigned int secs) +{ + return private_sleep((double)secs); } -int smpi_gettimeofday(struct timeval *tv) +int smpi_usleep(useconds_t usecs) +{ + return (int)private_sleep((double)usecs / 1000000.0); +} + + +int smpi_gettimeofday(struct timeval *tv, void* tz) { double now; smpi_bench_end(); @@ -228,11 +260,11 @@ int smpi_gettimeofday(struct timeval *tv) return 0; } -extern double sg_maxmin_precision; +extern double sg_surf_precision; unsigned long long smpi_rastro_resolution (void) { smpi_bench_end(); - double resolution = (1/sg_maxmin_precision); + double resolution = (1/sg_surf_precision); smpi_bench_begin(); return (unsigned long long)resolution; } @@ -472,7 +504,7 @@ void smpi_shared_free(void *ptr) shared_metadata_t* meta; shared_data_t* data; if (sg_cfg_get_boolean("smpi/use_shared_malloc")){ - + if (!allocs) { XBT_WARN("Cannot free: nothing was allocated"); return; @@ -554,3 +586,188 @@ void* smpi_shared_set_call(const char* func, const char* input, void* data) { free(loc); return data; } + + + + +#define TOPAGE(addr) (void *)(((unsigned long)(addr) / xbt_pagesize) * xbt_pagesize) + + +/* + * - read the executable data+bss section addresses and sizes + * - for each process create a copy of these sections with mmap + * - store them in a dynar + * + */ + + + +void smpi_switch_data_segment(int dest){ + + if(size_data_exe == 0)//no need to switch + return; + + if (smpi_loaded_page==dest)//no need to switch either + return; + +#ifdef HAVE_MMAP + int i; + if(smpi_loaded_page==-1){//initial switch, do the copy from the real page here + for (i=0; i< SIMIX_process_count(); i++){ + memcpy(smpi_privatisation_regions[i].address,TOPAGE(start_data_exe),size_data_exe); + } + } + int current = smpi_privatisation_regions[dest].file_descriptor; + XBT_VERB("Switching data frame to the one of process %d", dest); + void* tmp = mmap (TOPAGE(start_data_exe), size_data_exe, PROT_READ | PROT_WRITE, MAP_FIXED | MAP_SHARED, current, 0); + if (tmp != TOPAGE(start_data_exe)) + xbt_die("Couldn't map the new region"); + smpi_loaded_page=dest; +#endif +} + +void smpi_get_executable_global_size(){ + int size_bss_binary=0; + int size_data_binary=0; + FILE *fp; + char *line = NULL; /* Temporal storage for each line that is readed */ + ssize_t read; /* Number of bytes readed */ + size_t n = 0; /* Amount of bytes to read by xbt_getline */ + + char *lfields[7]; + int i, found = 0; + + char *command = bprintf("objdump --section-headers %s", xbt_binary_name); + + fp = popen(command, "r"); + + if(fp == NULL){ + perror("popen failed"); + xbt_abort(); + } + + while ((read = xbt_getline(&line, &n, fp)) != -1 && found != 2) { + + if(n == 0) + continue; + + /* Wipeout the new line character */ + line[read - 1] = '\0'; + + lfields[0] = strtok(line, " "); + + if(lfields[0] == NULL) + continue; + + if(strcmp(lfields[0], "Sections:") == 0 + || strcmp(lfields[0], "Idx") == 0 + || strncmp(lfields[0], xbt_binary_name, strlen(xbt_binary_name)) == 0) + continue; + + for (i = 1; i < 7 && lfields[i - 1] != NULL; i++) { + lfields[i] = strtok(NULL, " "); + } + + /* + * we are looking for these fields + 23 .data 02625a20 00000000006013e0 00000000006013e0 000013e0 2**5 + CONTENTS, ALLOC, LOAD, DATA + 24 .bss 02625a40 0000000002c26e00 0000000002c26e00 02626e00 2**5 + ALLOC + */ + + if(i>=6){ + if(strcmp(lfields[1], ".data") == 0){ + size_data_binary = strtoul(lfields[2], NULL, 16); + start_data_exe = (char*) strtoul(lfields[4], NULL, 16); + found++; + }else if(strcmp(lfields[1], ".bss") == 0){ + //the beginning of bss is not exactly the end of data if not aligned, grow bss reported size accordingly + //TODO : check if this is OK, as some segments may be inserted between them.. + size_bss_binary = ((char*) strtoul(lfields[4], NULL, 16) - (start_data_exe + size_data_binary)) + + strtoul(lfields[2], NULL, 16); + found++; + } + + } + + } + + size_data_exe =(unsigned long)start_data_exe - (unsigned long)TOPAGE(start_data_exe)+ size_data_binary+size_bss_binary; + xbt_free(command); + xbt_free(line); + pclose(fp); + +} + +void smpi_initialize_global_memory_segments(){ + +#ifndef HAVE_MMAP + smpi_privatize_global_variables=0; + return; +#else + + unsigned int i = 0; + smpi_get_executable_global_size(); + + XBT_DEBUG ("bss+data segment found : size %d starting at %p",size_data_exe, start_data_exe ); + + if(size_data_exe == 0){//no need to switch + smpi_privatize_global_variables=0; + return; + } + + smpi_privatisation_regions = (smpi_privatisation_region_t) malloc( + sizeof(struct s_smpi_privatisation_region) * sizeof(int)); + + for (i=0; i< SIMIX_process_count(); i++){ + //create SIMIX_process_count() mappings of this size with the same data inside + void *address = NULL; + char path[] = "/dev/shm/my-buffer-XXXXXX"; + int status; + + int file_descriptor= mkstemp (path); + if (file_descriptor < 0) + xbt_die("Impossible to create temporary file for memory mapping"); + + status = unlink (path); + if (status) + xbt_die("Impossible to unlink temporary file for memory mapping"); + + status = ftruncate(file_descriptor, size_data_exe); + if(status) + xbt_die("Impossible to set the size of the temporary file for memory mapping"); + + /* Ask for a free region */ + address = mmap (NULL, size_data_exe, PROT_READ | PROT_WRITE, MAP_SHARED, file_descriptor, 0); + if (address == MAP_FAILED) + xbt_die("Couldn't find a free region for memory mapping"); + + //initialize the values + memcpy(address,TOPAGE(start_data_exe),size_data_exe); + + //store the address of the mapping for further switches + smpi_privatisation_regions[i].file_descriptor = file_descriptor; + smpi_privatisation_regions[i].address = address; + } + +#endif + +} + +void smpi_destroy_global_memory_segments(){ + if(size_data_exe == 0)//no need to switch + return; +#ifdef HAVE_MMAP + int i; + for (i=0; i< smpi_process_count(); i++){ + if(munmap(smpi_privatisation_regions[i].address,size_data_exe) < 0) { + XBT_WARN("Unmapping of fd %d failed: %s", + smpi_privatisation_regions[i].file_descriptor, strerror(errno)); + } + close(smpi_privatisation_regions[i].file_descriptor); + } + xbt_free(smpi_privatisation_regions); +#endif + +}