-/* Copyright (c) 2007, 2009-2015. The SimGrid Team.
- * All rights reserved. */
+/* Copyright (c) 2007, 2009-2017. 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 <cstring>
-
-#include <unordered_map>
-#include <utility>
-
#include "src/internal_config.h"
#include "private.h"
-#include "xbt/dict.h"
-#include "xbt/sysdep.h"
-#include "xbt/ex.h"
-#include "surf/surf.h"
-#include "simgrid/sg_config.h"
+#include "private.hpp"
#include "simgrid/modelchecker.h"
#include "src/mc/mc_replay.h"
+#include "src/smpi/smpi_process.hpp"
+#include "src/smpi/smpi_comm.hpp"
#ifndef WIN32
#include <sys/mman.h>
#endif
-#include <sys/stat.h>
-#include <sys/types.h>
-#include <errno.h>
-#include <fcntl.h>
#include <math.h> // sqrt
-#include <unistd.h>
-#include <string.h>
-#include <stdio.h>
-#ifndef MAP_ANONYMOUS
-#define MAP_ANONYMOUS MAP_ANON
+#if HAVE_PAPI
+#include <papi.h>
#endif
-XBT_LOG_NEW_DEFAULT_SUBCATEGORY(smpi_bench, smpi,
- "Logging specific to SMPI (benchmarking)");
-
-/* Shared allocations are handled through shared memory segments.
- * Associated data and metadata are used as follows:
- *
- * mmap #1
- * `allocs' dict ---- -.
- * ---------- shared_data_t shared_metadata_t / | | |
- * .->| <name> | ---> -------------------- <--. ----------------- | | | |
- * | ---------- | fd of <name> | | | size of mmap | --| | | |
- * | | count (2) | |-- | data | \ | | |
- * `----------------- | <name> | | ----------------- ---- |
- * -------------------- | ^ |
- * | | |
- * | | `allocs_metadata' dict |
- * | | ---------------------- |
- * | `-- | <addr of mmap #1> |<-'
- * | .-- | <addr of mmap #2> |<-.
- * | | ---------------------- |
- * | | |
- * | | |
- * | | |
- * | | mmap #2 |
- * | v ---- -'
- * | shared_metadata_t / | |
- * | ----------------- | | |
- * | | size of mmap | --| | |
- * `-- | data | | | |
- * ----------------- | | |
- * \ | |
- * ----
- */
-
-#define PTR_STRLEN (2 + 2 * sizeof(void*) + 1)
-
-xbt_dict_t samples = NULL; /* Allocated on first use */
-xbt_dict_t calls = NULL; /* Allocated on first use */
-
-double smpi_cpu_threshold;
-double smpi_running_power;
-
-int smpi_loaded_page = -1;
-char* smpi_start_data_exe = NULL;
-int smpi_size_data_exe = 0;
-int smpi_privatize_global_variables;
-double smpi_total_benched_time = 0;
-smpi_privatisation_region_t smpi_privatisation_regions;
-
-namespace {
-
-/** Some location in the source code
- *
- * This information is used by SMPI_SHARED_MALLOC to allocate
- * some shared memory for all simulated processes.
- */
-class smpi_source_location {
-public:
- smpi_source_location(const char* filename, int line)
- : filename(filename), filename_length(strlen(filename)), line(line) {}
-
- /** Pointer to a static string containing the file name */
- const char* filename = nullptr;
- int filename_length = 0;
- int line = 0;
-
- bool operator==(smpi_source_location const& that) const
- {
- return filename_length == that.filename_length
- && line == that.line
- && std::memcmp(filename, that.filename, filename_length) == 0;
- }
- bool operator!=(smpi_source_location const& that) const
- {
- return !(*this == that);
- }
-};
+XBT_LOG_NEW_DEFAULT_SUBCATEGORY(smpi_bench, smpi, "Logging specific to SMPI (benchmarking)");
-}
-
-namespace std {
-
-template<>
-class hash<smpi_source_location> {
-public:
- typedef smpi_source_location argument_type;
- typedef std::size_t result_type;
- result_type operator()(smpi_source_location const& loc) const
- {
- return xbt_str_hash_ext(loc.filename, loc.filename_length)
- ^ xbt_str_hash_ext((const char*) &loc.line, sizeof(loc.line));
- }
-};
-}
-
-namespace {
-
-typedef struct {
- int fd = -1;
- int count = 0;
-} shared_data_t;
-
-std::unordered_map<smpi_source_location, shared_data_t> allocs;
-typedef std::unordered_map<smpi_source_location, shared_data_t>::value_type shared_data_key_type;
-
-typedef struct {
- size_t size;
- shared_data_key_type* data;
-} shared_metadata_t;
-
-std::unordered_map<void*, shared_metadata_t> allocs_metadata;
-
-}
+xbt_dict_t samples = nullptr; /* Allocated on first use */
-static size_t shm_size(int fd) {
- struct stat st;
+double smpi_cpu_threshold = -1;
+double smpi_host_speed;
- if(fstat(fd, &st) < 0) {
- xbt_die("Could not stat fd %d: %s", fd, strerror(errno));
- }
- return (size_t)st.st_size;
-}
-
-#ifndef WIN32
-static void* shm_map(int fd, size_t size, shared_data_key_type* data) {
- void* mem;
- char loc[PTR_STRLEN];
- shared_metadata_t meta;
-
- if(size > shm_size(fd)) {
- if(ftruncate(fd, (off_t)size) < 0) {
- xbt_die("Could not truncate fd %d to %zu: %s", fd, size, strerror(errno));
- }
- }
-
- mem = mmap(NULL, size, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0);
- if(mem == MAP_FAILED) {
- xbt_die("Could not map fd %d: %s", fd, strerror(errno));
- }
- snprintf(loc, PTR_STRLEN, "%p", mem);
- meta.size = size;
- meta.data = data;
- allocs_metadata[mem] = meta;
- XBT_DEBUG("MMAP %zu to %p", size, mem);
- return mem;
-}
-#endif
+shared_malloc_type smpi_cfg_shared_malloc = shmalloc_global;
+double smpi_total_benched_time = 0;
+smpi_privatisation_region_t smpi_privatisation_regions;
-void smpi_bench_destroy(void)
+void smpi_bench_destroy()
{
- allocs.clear();
- allocs_metadata.clear();
xbt_dict_free(&samples);
- xbt_dict_free(&calls);
}
extern "C" XBT_PUBLIC(void) smpi_execute_flops_(double *flops);
}
void smpi_execute_flops(double flops) {
- smx_synchro_t action;
XBT_DEBUG("Handle real computation time: %f flops", flops);
- action = simcall_execution_start("computation", flops, 1, 0, 0);
+ smx_activity_t action = simcall_execution_start("computation", flops, 1, 0);
simcall_set_category (action, TRACE_internal_smpi_get_category());
simcall_execution_wait(action);
- smpi_switch_data_segment(smpi_process_index());
+ smpi_switch_data_segment(smpi_process()->index());
}
void smpi_execute(double duration)
{
if (duration >= smpi_cpu_threshold) {
XBT_DEBUG("Sleep for %g to handle real computation time", duration);
- double flops = duration * smpi_running_power;
- int rank = smpi_process_index();
+ double flops = duration * smpi_host_speed;
+ 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);
+
smpi_execute_flops(flops);
TRACE_smpi_computing_out(rank);
} else {
- XBT_DEBUG("Real computation took %g while option smpi/cpu_threshold is set to %g => ignore it",
- duration, 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_switch_data_segment(int dest);
+void smpi_execute_benched(double duration)
+{
+ smpi_bench_end();
+ smpi_execute(duration);
+ smpi_bench_begin();
+}
-void smpi_bench_begin(void)
+void smpi_bench_begin()
{
- if (smpi_privatize_global_variables) {
- smpi_switch_data_segment(smpi_process_index());
+ if (smpi_privatize_global_variables == SMPI_PRIVATIZE_MMAP) {
+ smpi_switch_data_segment(smpi_process()->index());
}
if (MC_is_active() || MC_record_replay_is_active())
return;
- xbt_os_threadtimer_start(smpi_process_timer());
+#if HAVE_PAPI
+ if (xbt_cfg_get_string("smpi/papi-events")[0] != '\0') {
+ int event_set = smpi_process()->papi_event_set();
+ // PAPI_start sets everything to 0! See man(3) PAPI_start
+ if (PAPI_LOW_LEVEL_INITED == PAPI_is_initialized()) {
+ if (PAPI_start(event_set) != PAPI_OK) {
+ // TODO This needs some proper handling.
+ XBT_CRITICAL("Could not start PAPI counters.\n");
+ xbt_die("Error.");
+ }
+ }
+ }
+#endif
+ xbt_os_threadtimer_start(smpi_process()->timer());
}
-void smpi_bench_end(void)
+void smpi_bench_end()
{
-
if (MC_is_active() || MC_record_replay_is_active())
return;
- xbt_os_timer_t timer = smpi_process_timer();
+ double speedup = 1;
+ 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()) {
+
+#if HAVE_PAPI
+ /**
+ * An MPI function has been called and now is the right time to update
+ * our PAPI counters for this process.
+ */
+ if (xbt_cfg_get_string("smpi/papi-events")[0] != '\0') {
+ papi_counter_t& counter_data = smpi_process()->papi_counters();
+ int event_set = smpi_process()->papi_event_set();
+ std::vector<long long> event_values = std::vector<long long>(counter_data.size());
+
+ if (PAPI_stop(event_set, &event_values[0]) != PAPI_OK) { // Error
+ XBT_CRITICAL("Could not stop PAPI counters.\n");
+ xbt_die("Error.");
+ } else {
+ for (unsigned int i = 0; i < counter_data.size(); i++) {
+ counter_data[i].second += event_values[i];
+ // XBT_DEBUG("[%i] PAPI: Counter %s: Value is now %lli (got increment by %lli\n", smpi_process()->index(),
+ // counter_data[i].first.c_str(), counter_data[i].second, event_values[i]);
+ }
+ }
+ }
+#endif
+
+ if (smpi_process()->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.");
}
+
+ if (xbt_cfg_get_string("smpi/comp-adjustment-file")[0] != '\0') { // Maybe we need to artificially speed up or slow
+ // down our computation based on our statistical analysis.
+
+ smpi_trace_call_location_t* loc = smpi_process()->call_location();
+ std::string key = loc->get_composed_key();
+ std::unordered_map<std::string, double>::const_iterator it = location2speedup.find(key);
+ if (it != location2speedup.end()) {
+ speedup = it->second;
+ }
+ }
+
// 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));
+ if (xbt_cfg_get_boolean("smpi/simulate-computation")) {
+ smpi_execute(xbt_os_timer_elapsed(timer)/speedup);
}
+#if HAVE_PAPI
+ if (xbt_cfg_get_string("smpi/papi-events")[0] != '\0' && TRACE_smpi_is_enabled()) {
+ char container_name[INSTR_DEFAULT_STR_SIZE];
+ smpi_container(smpi_process()->index(), container_name, INSTR_DEFAULT_STR_SIZE);
+ container_t container = PJ_container_get(container_name);
+ papi_counter_t& counter_data = smpi_process()->papi_counters();
+
+ for (auto& pair : counter_data) {
+ new_pajeSetVariable(surf_get_clock(), container,
+ PJ_type_get(/* countername */ pair.first.c_str(), container->type), pair.second);
+ }
+ }
+#endif
+
smpi_total_benched_time += xbt_os_timer_elapsed(timer);
}
smpi_bench_end();
XBT_DEBUG("Sleep for: %lf secs", secs);
- int rank = smpi_comm_rank(MPI_COMM_WORLD);
+ int rank = MPI_COMM_WORLD->rank();
instr_extra_data extra = xbt_new0(s_instr_extra_data_t,1);
extra->type=TRACING_SLEEPING;
extra->sleep_duration=secs;
unsigned int smpi_sleep(unsigned int secs)
{
- return private_sleep((double)secs);
+ return private_sleep(static_cast<double>(secs));
}
int smpi_usleep(useconds_t usecs)
{
- return (int)private_sleep((double)usecs / 1000000.0);
+ return static_cast<int>(private_sleep(static_cast<double>(usecs) / 1000000.0));
}
+#if _POSIX_TIMERS > 0
+int smpi_nanosleep(const struct timespec *tp, struct timespec * t)
+{
+ return static_cast<int>(private_sleep(static_cast<double>(tp->tv_sec + tp->tv_nsec / 1000000000.0)));
+}
+#endif
int smpi_gettimeofday(struct timeval *tv, void* tz)
{
- double now;
smpi_bench_end();
- now = SIMIX_get_clock();
+ double now = SIMIX_get_clock();
if (tv) {
- tv->tv_sec = (time_t)now;
+ tv->tv_sec = static_cast<time_t>(now);
#ifdef WIN32
- tv->tv_usec = (useconds_t)((now - tv->tv_sec) * 1e6);
+ tv->tv_usec = static_cast<useconds_t>((now - tv->tv_sec) * 1e6);
#else
- tv->tv_usec = (suseconds_t)((now - tv->tv_sec) * 1e6);
+ tv->tv_usec = static_cast<suseconds_t>((now - tv->tv_sec) * 1e6);
#endif
}
smpi_bench_begin();
return 0;
}
+#if _POSIX_TIMERS > 0
+int smpi_clock_gettime(clockid_t clk_id, struct timespec *tp)
+{
+ //there is only one time in SMPI, so clk_id is ignored.
+ smpi_bench_end();
+ double now = SIMIX_get_clock();
+ if (tp) {
+ tp->tv_sec = static_cast<time_t>(now);
+ tp->tv_nsec = static_cast<long int>((now - tp->tv_sec) * 1e9);
+ }
+ smpi_bench_begin();
+ return 0;
+}
+#endif
+
extern double sg_surf_precision;
-unsigned long long smpi_rastro_resolution (void)
+unsigned long long smpi_rastro_resolution ()
{
smpi_bench_end();
double resolution = (1/sg_surf_precision);
smpi_bench_begin();
- return (unsigned long long)resolution;
+ return static_cast<unsigned long long>(resolution);
}
-unsigned long long smpi_rastro_timestamp (void)
+unsigned long long smpi_rastro_timestamp ()
{
smpi_bench_end();
double now = SIMIX_get_clock();
- unsigned long long sec = (unsigned long long)now;
+ unsigned long long sec = static_cast<unsigned long long>(now);
unsigned long long pre = (now - sec) * smpi_rastro_resolution();
smpi_bench_begin();
- return (unsigned long long)sec * smpi_rastro_resolution() + pre;
+ return static_cast<unsigned long long>(sec) * smpi_rastro_resolution() + pre;
}
/* ****************************** Functions related to the SMPI_SAMPLE_ macros ************************************/
if (global) {
return bprintf("%s:%d", file, line);
} else {
- return bprintf("%s:%d:%d", file, line, smpi_process_index());
+ return bprintf("%s:%d:%d", file, line, smpi_process()->index());
}
}
+
static int sample_enough_benchs(local_data_t *data) {
int res = data->count >= data->iters;
if (data->threshold>0.0) {
res = 0; // stderr too high yet
}
XBT_DEBUG("%s (count:%d iter:%d stderr:%f thres:%f mean:%fs)",
- (res?"enough benchs":"need more data"),
- data->count, data->iters, data->relstderr, data->threshold, data->mean);
+ (res?"enough benchs":"need more data"), data->count, data->iters, data->relstderr, data->threshold, data->mean);
return res;
}
void smpi_sample_1(int global, const char *file, int line, int iters, double threshold)
{
char *loc = sample_location(global, file, line);
- local_data_t *data;
smpi_bench_end(); /* Take time from previous, unrelated computation into account */
- smpi_process_set_sampling(1);
+ smpi_process()->set_sampling(1);
- if (!samples)
+ if (samples==nullptr)
samples = xbt_dict_new_homogeneous(free);
- data = static_cast<local_data_t *>(xbt_dict_get_or_null(samples, loc));
- if (!data) {
+ local_data_t *data = static_cast<local_data_t *>(xbt_dict_get_or_null(samples, loc));
+ if (data==nullptr) {
xbt_assert(threshold>0 || iters>0,
"You should provide either a positive amount of iterations to bench, or a positive maximal stderr (or both)");
- data = (local_data_t *) xbt_new(local_data_t, 1);
+ data = static_cast<local_data_t *>( xbt_new(local_data_t, 1));
data->count = 0;
data->sum = 0.0;
data->sum_pow2 = 0.0;
data->threshold = threshold;
data->benching = 1; // If we have no data, we need at least one
data->mean = 0;
- xbt_dict_set(samples, loc, data, NULL);
+ xbt_dict_set(samples, loc, data, nullptr);
XBT_DEBUG("XXXXX First time ever on benched nest %s.",loc);
} else {
if (data->iters != iters || data->threshold != threshold) {
- XBT_ERROR("Asked to bench block %s with different settings %d, %f is not %d, %f. How did you manage to give two numbers at the same line??",
- loc, data->iters, data->threshold, iters,threshold);
+ XBT_ERROR("Asked to bench block %s with different settings %d, %f is not %d, %f. "
+ "How did you manage to give two numbers at the same line??",
+ loc, data->iters, data->threshold, iters, threshold);
THROW_IMPOSSIBLE;
}
- // if we already have some data, check whether sample_2 should get one more bench or whether it should emulate the computation instead
- data->benching = !sample_enough_benchs(data);
- XBT_DEBUG("XXXX Re-entering the benched nest %s. %s",loc, (data->benching?"more benching needed":"we have enough data, skip computes"));
+ // if we already have some data, check whether sample_2 should get one more bench or whether it should emulate
+ // the computation instead
+ data->benching = (sample_enough_benchs(data) == 0);
+ XBT_DEBUG("XXXX Re-entering the benched nest %s. %s", loc,
+ (data->benching ? "more benching needed" : "we have enough data, skip computes"));
}
xbt_free(loc);
}
int smpi_sample_2(int global, const char *file, int line)
{
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 = static_cast<local_data_t *>(xbt_dict_get(samples, loc));
+ local_data_t *data = static_cast<local_data_t *>(xbt_dict_get(samples, loc));
XBT_DEBUG("sample2 %s",loc);
xbt_free(loc);
data->count, data->iters, data->relstderr, data->threshold, data->mean);
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);
+ // 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_process_set_sampling(0);
+ smpi_process()->set_sampling(0);
res = 0; // prepare to capture future, unrelated computations
}
smpi_bench_begin();
return res;
}
-
void smpi_sample_3(int global, const char *file, int line)
{
char *loc = sample_location(global, file, line);
- local_data_t *data;
xbt_assert(samples, "Y U NO use SMPI_SAMPLE_* macros? Stop messing directly with smpi_sample_* functions!");
- data = static_cast<local_data_t *>(xbt_dict_get(samples, loc));
+ local_data_t *data = static_cast<local_data_t *>(xbt_dict_get(samples, loc));
XBT_DEBUG("sample3 %s",loc);
xbt_free(loc);
- if (data->benching==0) {
+ if (data->benching==0)
THROW_IMPOSSIBLE;
- }
// ok, benchmarking this loop is over
- xbt_os_threadtimer_stop(smpi_process_timer());
+ xbt_os_threadtimer_stop(smpi_process()->timer());
// update the stats
- double sample, n;
data->count++;
- sample = xbt_os_timer_elapsed(smpi_process_timer());
+ double sample = xbt_os_timer_elapsed(smpi_process()->timer());
data->sum += sample;
data->sum_pow2 += sample * sample;
- n = (double)data->count;
+ double n = static_cast<double>(data->count);
data->mean = data->sum / n;
data->relstderr = sqrt((data->sum_pow2 / n - data->mean * data->mean) / n) / data->mean;
- if (!sample_enough_benchs(data)) {
- data->mean = sample; // Still in benching process; We want sample_2 to simulate the exact time of this loop occurrence before leaving, not the mean over the history
+ if (sample_enough_benchs(data)==0) {
+ data->mean = sample; // Still in benching process; We want sample_2 to simulate the exact time of this loop
+ // occurrence before leaving, not the mean over the history
}
XBT_DEBUG("Average mean after %d steps is %f, relative standard error is %f (sample was %f)", data->count,
data->mean, data->relstderr, sample);
data->benching = 0;
}
-#ifndef WIN32
-
-void *smpi_shared_malloc(size_t size, const char *file, int line)
-{
- void* mem;
- if (sg_cfg_get_boolean("smpi/use_shared_malloc")){
- int fd;
- smpi_source_location loc(file, line);
- auto res = allocs.insert(std::make_pair(loc, shared_data_t()));
- auto data = res.first;
- if (res.second) {
- // The insertion did not take place.
- // Generate a shared memory name from the address of the shared_data:
- char shmname[256];
- sprintf(shmname, "/shmalloc%p", &*data);
- fd = shm_open(shmname, 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", shmname);
- default:
- xbt_die("An unhandled error occured while opening %s. shm_open: %s", shmname, strerror(errno));
- }
- }
- data->second.fd = fd;
- data->second.count = 1;
- mem = shm_map(fd, size, &*data);
- if (shm_unlink(shmname) < 0) {
- XBT_WARN("Could not early unlink %s. shm_unlink: %s", shmname, strerror(errno));
- }
- XBT_DEBUG("Mapping %s at %p through %d", shmname, mem, fd);
- } else {
- mem = shm_map(data->second.fd, size, &*data);
- data->second.count++;
- }
- XBT_DEBUG("Shared malloc %zu in %p (metadata at %p)", size, mem, &*data);
- } else {
- mem = xbt_malloc(size);
- XBT_DEBUG("Classic malloc %zu in %p", size, mem);
+extern "C" { /** These functions will be called from the user code **/
+ smpi_trace_call_location_t* smpi_trace_get_call_location() {
+ return smpi_process()->call_location();
}
- return mem;
-}
+ void smpi_trace_set_call_location(const char* file, const int line) {
+ smpi_trace_call_location_t* loc = smpi_process()->call_location();
-void smpi_shared_free(void *ptr)
-{
- char loc[PTR_STRLEN];
-
- if (sg_cfg_get_boolean("smpi/use_shared_malloc")){
- snprintf(loc, PTR_STRLEN, "%p", ptr);
- auto meta = allocs_metadata.find(ptr);
- if (meta == allocs_metadata.end()) {
- XBT_WARN("Cannot free: %p was not shared-allocated by SMPI", ptr);
- return;
- }
- shared_data_t* data = &meta->second.data->second;
- if (munmap(ptr, meta->second.size) < 0) {
- XBT_WARN("Unmapping of fd %d failed: %s", data->fd, strerror(errno));
- }
- data->count--;
- XBT_DEBUG("Shared free - no removal - of %p, count = %d", ptr, data->count);
- if (data->count <= 0) {
- close(data->fd);
- allocs.erase(allocs.find(meta->second.data->first));
- XBT_DEBUG("Shared free - with removal - of %p", ptr);
- }
- }else{
- XBT_DEBUG("Classic free of %p", ptr);
- xbt_free(ptr);
+ loc->previous_filename = loc->filename;
+ loc->previous_linenumber = loc->linenumber;
+ loc->filename = file;
+ loc->linenumber = line;
}
-}
-#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 = 0;
- if (!calls) {
- calls = xbt_dict_new_homogeneous(NULL);
- }
- TRY {
- xbt_dict_get(calls, loc); /* Succeed or throw */
- known = 1;
+ /**
+ * Required for Fortran bindings
+ */
+ void smpi_trace_set_call_location_(const char* file, int* line) {
+ smpi_trace_set_call_location(file, *line);
}
- 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) {
- char* loc = bprintf("%s:%s", func, input);
- void* data;
-
- if(!calls) {
- calls = xbt_dict_new_homogeneous(NULL);
- }
- data = xbt_dict_get(calls, loc);
- free(loc);
- return data;
-}
-
-void* smpi_shared_set_call(const char* func, const char* input, void* data) {
- char* loc = bprintf("%s:%s", func, input);
-
- if(!calls) {
- calls = xbt_dict_new_homogeneous(NULL);
- }
- xbt_dict_set(calls, loc, data, NULL);
- free(loc);
- return data;
-}
-
-
-
-
-#define TOPAGE(addr) (void *)(((unsigned long)(addr) / xbt_pagesize) * xbt_pagesize)
-
-
-/** Map a given SMPI privatization segment (make a SMPI process active)
- */
-void smpi_switch_data_segment(int dest){
-
- if (smpi_loaded_page==dest)//no need to switch either
- return;
-
- // So the job:
- smpi_really_switch_data_segment(dest);
-}
-/** Map a given SMPI privatization segment (make a SMPI process active)
- * even if SMPI thinks it is already active
- *
- * When doing a state restoration, the state of the restored variables
- * might not be consistent with the state of the virtual memory.
- * In this case, we to change the data segment.
- */
-void smpi_really_switch_data_segment(int dest) {
-
- if(smpi_size_data_exe == 0)//no need to switch
- return;
-
-#ifdef HAVE_PRIVATIZATION
- int i;
- if(smpi_loaded_page==-1){//initial switch, do the copy from the real page here
- for (i=0; i< smpi_process_count(); i++){
- memcpy(smpi_privatisation_regions[i].address,
- TOPAGE(smpi_start_data_exe), smpi_size_data_exe);
- }
- }
-
- // FIXME, cross-process support (mmap across process when necessary)
- int current = smpi_privatisation_regions[dest].file_descriptor;
- XBT_DEBUG("Switching data frame to the one of process %d", dest);
- void* tmp = mmap (TOPAGE(smpi_start_data_exe), smpi_size_data_exe,
- PROT_READ | PROT_WRITE, MAP_FIXED | MAP_SHARED, current, 0);
- if (tmp != TOPAGE(smpi_start_data_exe))
- xbt_die("Couldn't map the new region");
- smpi_loaded_page = dest;
-#endif
-}
-
-int smpi_is_privatisation_file(char* file)
-{
- return strncmp("/dev/shm/my-buffer-", file, 19) == 0;
-}
-
-void smpi_initialize_global_memory_segments(){
-
-#ifndef HAVE_PRIVATIZATION
- smpi_privatize_global_variables=0;
- xbt_die("You are trying to use privatization on a system that does not support it. Don't.");
- return;
-#else
-
- int i = 0;
- smpi_get_executable_global_size();
-
- XBT_DEBUG ("bss+data segment found : size %d starting at %p",
- smpi_size_data_exe, smpi_start_data_exe );
-
- if (smpi_size_data_exe == 0){//no need to switch
- smpi_privatize_global_variables=0;
- return;
+ /**
+ * Required for Fortran if -fsecond-underscore is activated
+ */
+ void smpi_trace_set_call_location__(const char* file, int* line) {
+ smpi_trace_set_call_location(file, *line);
}
-
- smpi_privatisation_regions = (smpi_privatisation_region_t) malloc(
- smpi_process_count() * sizeof(struct s_smpi_privatisation_region));
-
- for (i=0; i< smpi_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) {
- if (errno==EMFILE) {
- xbt_die("Impossible to create temporary file for memory mapping: %s\n\
-The open() system call failed with the EMFILE error code (too many files). \n\n\
-This means that you reached the system limits concerning the amount of files per process. \
-This is not a surprise if you are trying to virtualize many processes on top of SMPI. \
-Don't panic -- you should simply increase your system limits and try again. \n\n\
-First, check what your limits are:\n\
- cat /proc/sys/fs/file-max # Gives you the system-wide limit\n\
- ulimit -Hn # Gives you the per process hard limit\n\
- ulimit -Sn # Gives you the per process soft limit\n\
- cat /proc/self/limits # Displays any per-process limitation (including the one given above)\n\n\
-If one of these values is less than the amount of MPI processes that you try to run, then you got the explanation of this error. \
-Ask the Internet about tutorials on how to increase the files limit such as: https://rtcamp.com/tutorials/linux/increase-open-files-limit/",
- strerror(errno));
- }
- xbt_die("Impossible to create temporary file for memory mapping: %s",
- strerror(errno));
- }
-
- status = unlink (path);
- if (status)
- xbt_die("Impossible to unlink temporary file for memory mapping");
-
- status = ftruncate(file_descriptor, smpi_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, smpi_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(smpi_start_data_exe), smpi_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 (smpi_size_data_exe == 0)//no need to switch
- return;
-#ifdef HAVE_PRIVATIZATION
- int i;
- for (i=0; i< smpi_process_count(); i++){
- if(munmap(smpi_privatisation_regions[i].address, smpi_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
-
}
