-/* Copyright (c) 2007, 2009, 2010. The SimGrid Team.
+/* Copyright (c) 2007, 2009-2013. The SimGrid Team.
* All rights reserved. */
/* This program is free software; you can redistribute it and/or modify it
#include "xbt/dict.h"
#include "xbt/sysdep.h"
#include "xbt/ex.h"
+#include "xbt/hash.h"
#include "surf/surf.h"
#include "simgrid/sg_config.h"
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;
+
typedef struct {
int fd;
int count;
xbt_die("Could not map fd %d: %s", fd, strerror(errno));
}
if(!allocs_metadata) {
- allocs_metadata = xbt_dict_new();
+ allocs_metadata = xbt_dict_new_homogeneous(xbt_free);
}
snprintf(loc, PTR_STRLEN, "%p", mem);
meta = xbt_new(shared_metadata_t, 1);
meta->size = size;
meta->data = data;
- xbt_dict_set(allocs_metadata, loc, meta, &free);
+ xbt_dict_set(allocs_metadata, loc, meta, NULL);
XBT_DEBUG("MMAP %zu to %p", size, mem);
return mem;
}
xbt_dict_free(&calls);
}
+XBT_PUBLIC(void) smpi_execute_flops_(double *flops);
+void smpi_execute_flops_(double *flops)
+{
+ smpi_execute_flops(*flops);
+}
+
+XBT_PUBLIC(void) smpi_execute_(double *duration);
+void smpi_execute_(double *duration)
+{
+ smpi_execute(*duration);
+}
+
void smpi_execute_flops(double flops) {
smx_action_t action;
smx_host_t host;
host = SIMIX_host_self();
-
XBT_DEBUG("Handle real computation time: %f flops", flops);
- action = simcall_host_execute("computation", host, flops, 1);
+ action = simcall_host_execute("computation", host, flops, 1, 0, 0);
#ifdef HAVE_TRACING
simcall_set_category (action, TRACE_internal_smpi_get_category());
#endif
simcall_host_execution_wait(action);
}
-static void smpi_execute(double duration)
+void smpi_execute(double duration)
{
- /* FIXME: a global variable would be less expensive to consult than a call to xbt_cfg_get_double() right on the critical path */
- if (duration >= sg_cfg_get_double("smpi/cpu_threshold")) {
- XBT_DEBUG("Sleep for %f to handle real computation time", duration);
- smpi_execute_flops(duration *
- sg_cfg_get_double("smpi/running_power"));
+ if (duration >= smpi_cpu_threshold) {
+ XBT_DEBUG("Sleep for %g to handle real computation time", duration);
+ double flops = duration * smpi_running_power;
+#ifdef HAVE_TRACING
+ int rank = smpi_process_index();
+ instr_extra_data extra = xbt_new0(s_instr_extra_data_t,1);
+ extra->type=TRACING_COMPUTING;
+ extra->comp_size=flops;
+ TRACE_smpi_computing_in(rank, extra);
+#endif
+ smpi_execute_flops(flops);
+
+#ifdef HAVE_TRACING
+ TRACE_smpi_computing_out(rank);
+#endif
+
} else {
- XBT_DEBUG("Real computation took %f while option smpi/cpu_threshold is set to %f => ignore it",
- duration, sg_cfg_get_double("smpi/cpu_threshold"));
+ XBT_DEBUG("Real computation took %g while option smpi/cpu_threshold is set to %g => ignore it",
+ duration, smpi_cpu_threshold);
}
}
void smpi_bench_end(void)
{
xbt_os_timer_t timer = smpi_process_timer();
-
xbt_os_threadtimer_stop(timer);
+ 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));
}
unsigned int smpi_sleep(unsigned int secs)
{
+ smx_action_t action;
+
smpi_bench_end();
- smpi_execute_flops((double) secs*simcall_host_get_speed(SIMIX_host_self()));
+
+ 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);
+ #ifdef HAVE_TRACING
+ simcall_set_category (action, TRACE_internal_smpi_get_category());
+ #endif
+ simcall_host_execution_wait(action);
+
smpi_bench_begin();
return secs;
}
/* ****************************** Functions related to the SMPI_SAMPLE_ macros ************************************/
typedef struct {
- int iters; /* amount of requested iterations */
- int count; /* amount of iterations done so far */
double threshold; /* maximal stderr requested (if positive) */
double relstderr; /* observed stderr so far */
double mean; /* mean of benched times, to be used if the block is disabled */
double sum; /* sum of benched times (to compute the mean and stderr) */
double sum_pow2; /* sum of the square of the benched times (to compute the stderr) */
+ int iters; /* amount of requested iterations */
+ int count; /* amount of iterations done so far */
int benching; /* 1: we are benchmarking; 0: we have enough data, no bench anymore */
} local_data_t;
local_data_t *data;
smpi_bench_end(); /* Take time from previous, unrelated computation into account */
+ smpi_process_set_sampling(1);
+
if (!samples)
samples = xbt_dict_new_homogeneous(free);
{
char *loc = sample_location(global, file, line);
local_data_t *data;
+ int res;
xbt_assert(samples, "Y U NO use SMPI_SAMPLE_* macros? Stop messing directly with smpi_sample_* functions!");
data = xbt_dict_get(samples, loc);
// we need to run a new bench
XBT_DEBUG("benchmarking: count:%d iter:%d stderr:%f thres:%f; mean:%f",
data->count, data->iters, data->relstderr, data->threshold, data->mean);
- smpi_bench_begin();
- return 1;
+ res = 1;
} else {
// Enough data, no more bench (either we got enough data from previous visits to this benched nest, or we just ran one bench and need to bail out now that our job is done).
// Just sleep instead
XBT_DEBUG("No benchmark (either no need, or just ran one): count >= iter (%d >= %d) or stderr<thres (%f<=%f). apply the %fs delay instead",
data->count, data->iters, data->relstderr, data->threshold, data->mean);
smpi_execute(data->mean);
-
- smpi_bench_begin(); // prepare to capture future, unrelated computations
- return 0;
+ smpi_process_set_sampling(0);
+ res = 0; // prepare to capture future, unrelated computations
}
+ smpi_bench_begin();
+ return res;
}
xbt_free(data);
}
+static char *smpi_shared_alloc_hash(char *loc)
+{
+ char hash[42];
+ char s[7];
+ unsigned val;
+ int i, j;
+
+ xbt_sha(loc, hash);
+ hash[41] = '\0';
+ s[6] = '\0';
+ loc = xbt_realloc(loc, 30);
+ loc[0] = '/';
+ for (i = 0; i < 40; i += 6) { /* base64 encode */
+ memcpy(s, hash + i, 6);
+ val = strtoul(s, NULL, 16);
+ for (j = 0; j < 4; j++) {
+ unsigned char x = (val >> (18 - 3 * j)) & 0x3f;
+ loc[1 + 4 * i / 6 + j] =
+ "ABCDEFGHIJKLMNOPQRSTUVZXYZabcdefghijklmnopqrstuvzxyz0123456789-_"[x];
+ }
+ }
+ loc[29] = '\0';
+ return loc;
+}
+
void *smpi_shared_malloc(size_t size, const char *file, int line)
{
- char *loc = bprintf("%zu_%s_%d", (size_t)getpid(), file, line);
- size_t len = strlen(loc);
- size_t i;
- int fd;
void* mem;
- shared_data_t *data;
if (sg_cfg_get_boolean("smpi/use_shared_malloc")){
- for(i = 0; i < len; i++) {
- /* Make the 'loc' ID be a flat filename */
- if(loc[i] == '/') {
- loc[i] = '_';
- }
- }
+ char *loc = bprintf("%zu_%s_%d", (size_t)getpid(), file, line);
+ int fd;
+ shared_data_t *data;
+ loc = smpi_shared_alloc_hash(loc); /* hash loc, in order to have something
+ * not too long */
if (!allocs) {
allocs = xbt_dict_new_homogeneous(smpi_shared_alloc_free);
}
data = xbt_dict_get_or_null(allocs, loc);
- if(!data) {
- fd = shm_open(loc, O_RDWR | O_CREAT | O_EXCL, S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH);
- if(fd < 0) {
+ if (!data) {
+ fd = shm_open(loc, O_RDWR | O_CREAT | O_EXCL,
+ S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH);
+ if (fd < 0) {
switch(errno) {
case EEXIST:
xbt_die("Please cleanup /dev/shm/%s", loc);
default:
- xbt_die("An unhandled error occured while opening %s: %s", loc, strerror(errno));
+ xbt_die("An unhandled error occured while opening %s. shm_open: %s", loc, strerror(errno));
}
}
data = xbt_new(shared_data_t, 1);
data->count = 1;
data->loc = loc;
mem = shm_map(fd, size, data);
- if(shm_unlink(loc) < 0) {
- XBT_WARN("Could not early unlink %s: %s", loc, strerror(errno));
+ if (shm_unlink(loc) < 0) {
+ XBT_WARN("Could not early unlink %s. shm_unlink: %s", loc, strerror(errno));
}
xbt_dict_set(allocs, loc, data, NULL);
XBT_DEBUG("Mapping %s at %p through %d", loc, mem, fd);
data->count++;
}
XBT_DEBUG("Shared malloc %zu in %p (metadata at %p)", size, mem, data);
- }else{
+ } else {
mem = xbt_malloc(size);
XBT_DEBUG("Classic malloc %zu in %p", size, mem);
}
}
#endif
-int smpi_shared_known_call(const char* func, const char* input) {
- char* loc = bprintf("%s:%s", func, input);
- xbt_ex_t ex;
- int known;
+int smpi_shared_known_call(const char* func, const char* input)
+{
+ char* loc = bprintf("%s:%s", func, input);
+ xbt_ex_t ex;
+ int known = 0;
- if(!calls) {
- calls = xbt_dict_new_homogeneous(NULL);
- }
- TRY {
- xbt_dict_get(calls, loc); /* Succeed or throw */
- known = 1;
- }
- CATCH(ex) {
- if(ex.category == not_found_error) {
- known = 0;
- xbt_ex_free(ex);
- } else {
- RETHROW;
- }
- }
- free(loc);
- return known;
+ if (!calls) {
+ calls = xbt_dict_new_homogeneous(NULL);
+ }
+ TRY {
+ xbt_dict_get(calls, loc); /* Succeed or throw */
+ known = 1;
+ }
+ TRY_CLEANUP {
+ xbt_free(loc);
+ }
+ CATCH(ex) {
+ if (ex.category != not_found_error)
+ RETHROW;
+ xbt_ex_free(ex);
+ }
+ return known;
}
void* smpi_shared_get_call(const char* func, const char* input) {
