+++ /dev/null
-/* Copyright (c) 2007-2015. 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 "private.h"
-#include "xbt/virtu.h"
-#include "mc/mc.h"
-#include "src/mc/mc_replay.h"
-#include "xbt/replay.h"
-#include <errno.h>
-#include "src/simix/smx_private.h"
-#include "surf/surf.h"
-#include "simgrid/sg_config.h"
-#include "colls/colls.h"
-
-XBT_LOG_NEW_DEFAULT_SUBCATEGORY(smpi_base, smpi, "Logging specific to SMPI (base)");
-
-
-static int match_recv(void* a, void* b, smx_synchro_t ignored) {
- MPI_Request ref = (MPI_Request)a;
- MPI_Request req = (MPI_Request)b;
- XBT_DEBUG("Trying to match a recv of src %d against %d, tag %d against %d",ref->src,req->src, ref->tag, req->tag);
-
- xbt_assert(ref, "Cannot match recv against null reference");
- xbt_assert(req, "Cannot match recv against null request");
- if((ref->src == MPI_ANY_SOURCE || req->src == ref->src)
- && ((ref->tag == MPI_ANY_TAG && req->tag >=0) || req->tag == ref->tag)){
- //we match, we can transfer some values
- // FIXME : move this to the copy function ?
- if(ref->src == MPI_ANY_SOURCE)ref->real_src = req->src;
- if(ref->tag == MPI_ANY_TAG)ref->real_tag = req->tag;
- if(ref->real_size < req->real_size) ref->truncated = 1;
- if(req->detached==1){
- ref->detached_sender=req; //tie the sender to the receiver, as it is detached and has to be freed in the receiver
- }
- XBT_DEBUG("match succeeded");
- return 1;
- }else return 0;
-}
-
-static int match_send(void* a, void* b,smx_synchro_t ignored) {
- MPI_Request ref = (MPI_Request)a;
- MPI_Request req = (MPI_Request)b;
- XBT_DEBUG("Trying to match a send of src %d against %d, tag %d against %d",ref->src,req->src, ref->tag, req->tag);
- xbt_assert(ref, "Cannot match send against null reference");
- xbt_assert(req, "Cannot match send against null request");
-
- if((req->src == MPI_ANY_SOURCE || req->src == ref->src)
- && ((req->tag == MPI_ANY_TAG && ref->tag >=0)|| req->tag == ref->tag))
- {
- if(req->src == MPI_ANY_SOURCE)req->real_src = ref->src;
- if(req->tag == MPI_ANY_TAG)req->real_tag = ref->tag;
- if(req->real_size < ref->real_size) req->truncated = 1;
- if(ref->detached==1){
- req->detached_sender=ref; //tie the sender to the receiver, as it is detached and has to be freed in the receiver
- }
- XBT_DEBUG("match succeeded");
- return 1;
- } else return 0;
-}
-
-
-typedef struct s_smpi_factor *smpi_factor_t;
-typedef struct s_smpi_factor {
- long factor;
- int nb_values;
- double values[4];//arbitrary set to 4
-} s_smpi_factor_t;
-xbt_dynar_t smpi_os_values = NULL;
-xbt_dynar_t smpi_or_values = NULL;
-xbt_dynar_t smpi_ois_values = NULL;
-
-double smpi_wtime_sleep = 0.0;
-double smpi_iprobe_sleep = 1e-4;
-double smpi_test_sleep = 1e-4;
-
-
-// Methods used to parse and store the values for timing injections in smpi
-// These are taken from surf/network.c and generalized to have more factors
-// These methods should be merged with those in surf/network.c (moved somewhere in xbt ?)
-
-static int factor_cmp(const void *pa, const void *pb)
-{
- return (((s_smpi_factor_t*)pa)->factor > ((s_smpi_factor_t*)pb)->factor) ? 1 :
- (((s_smpi_factor_t*)pa)->factor < ((s_smpi_factor_t*)pb)->factor) ? -1 : 0;
-}
-
-
-static xbt_dynar_t parse_factor(const char *smpi_coef_string)
-{
- char *value = NULL;
- unsigned int iter = 0;
- s_smpi_factor_t fact;
- fact.nb_values=0;
- int i=0;
- xbt_dynar_t smpi_factor, radical_elements, radical_elements2 = NULL;
-
- smpi_factor = xbt_dynar_new(sizeof(s_smpi_factor_t), NULL);
- radical_elements = xbt_str_split(smpi_coef_string, ";");
- xbt_dynar_foreach(radical_elements, iter, value) {
- memset(&fact, 0, sizeof(s_smpi_factor_t));
- radical_elements2 = xbt_str_split(value, ":");
- if (xbt_dynar_length(radical_elements2) <2 || xbt_dynar_length(radical_elements2) > 5)
- xbt_die("Malformed radical for smpi factor!");
- for(i =0; i<xbt_dynar_length(radical_elements2);i++ ){
- if (i==0){
- fact.factor = atol(xbt_dynar_get_as(radical_elements2, i, char *));
- }else{
- fact.values[fact.nb_values] = atof(xbt_dynar_get_as(radical_elements2, i, char *));
- fact.nb_values++;
- }
- }
-
- xbt_dynar_push_as(smpi_factor, s_smpi_factor_t, fact);
- XBT_DEBUG("smpi_factor:\t%ld : %d values, first: %f", fact.factor, fact.nb_values ,fact.values[0]);
- xbt_dynar_free(&radical_elements2);
- }
- xbt_dynar_free(&radical_elements);
- iter=0;
- xbt_dynar_sort(smpi_factor, &factor_cmp);
- xbt_dynar_foreach(smpi_factor, iter, fact) {
- XBT_DEBUG("smpi_factor:\t%ld : %d values, first: %f", fact.factor, fact.nb_values ,fact.values[0]);
- }
- return smpi_factor;
-}
-
-static double smpi_os(double size)
-{
- if (!smpi_os_values) {
- smpi_os_values = parse_factor(sg_cfg_get_string("smpi/os"));
- smpi_register_static(smpi_os_values, xbt_dynar_free_voidp);
- }
- unsigned int iter = 0;
- s_smpi_factor_t fact;
- double current=0.0;
- // Iterate over all the sections that were specified and find the right
- // value. (fact.factor represents the interval sizes; we want to find the
- // section that has fact.factor <= size and no other such fact.factor <= size)
- // Note: parse_factor() (used before) already sorts the dynar we iterate over!
- xbt_dynar_foreach(smpi_os_values, iter, fact) {
- if (size <= fact.factor) { // Values already too large, use the previously
- // computed value of current!
- XBT_DEBUG("os : %f <= %ld return %f", size, fact.factor, current);
- return current;
- }else{
- // If the next section is too large, the current section must be used.
- // Hence, save the cost, as we might have to use it.
- current = fact.values[0]+fact.values[1]*size;
- }
- }
- XBT_DEBUG("os : %f > %ld return %f", size, fact.factor, current);
-
- return current;
-}
-
-static double smpi_ois(double size)
-{
- if (!smpi_ois_values) {
- smpi_ois_values = parse_factor(sg_cfg_get_string("smpi/ois"));
- smpi_register_static(smpi_ois_values, xbt_dynar_free_voidp);
- }
- unsigned int iter = 0;
- s_smpi_factor_t fact;
- double current=0.0;
- // Iterate over all the sections that were specified and find the right
- // value. (fact.factor represents the interval sizes; we want to find the
- // section that has fact.factor <= size and no other such fact.factor <= size)
- // Note: parse_factor() (used before) already sorts the dynar we iterate over!
- xbt_dynar_foreach(smpi_ois_values, iter, fact) {
- if (size <= fact.factor) { // Values already too large, use the previously
- // computed value of current!
- XBT_DEBUG("ois : %f <= %ld return %f", size, fact.factor, current);
- return current;
- }else{
- // If the next section is too large, the current section must be used.
- // Hence, save the cost, as we might have to use it.
- current = fact.values[0]+fact.values[1]*size;
- }
- }
- XBT_DEBUG("ois : %f > %ld return %f", size, fact.factor, current);
-
- return current;
-}
-
-static double smpi_or(double size)
-{
- if (!smpi_or_values) {
- smpi_or_values = parse_factor(sg_cfg_get_string("smpi/or"));
- smpi_register_static(smpi_or_values, xbt_dynar_free_voidp);
- }
- unsigned int iter = 0;
- s_smpi_factor_t fact;
- double current=0.0;
- // Iterate over all the sections that were specified and find the right
- // value. (fact.factor represents the interval sizes; we want to find the
- // section that has fact.factor <= size and no other such fact.factor <= size)
- // Note: parse_factor() (used before) already sorts the dynar we iterate over!
- xbt_dynar_foreach(smpi_or_values, iter, fact) {
- if (size <= fact.factor) { // Values already too large, use the previously
- // computed value of current!
- XBT_DEBUG("or : %f <= %ld return %f", size, fact.factor, current);
- return current;
- } else {
- // If the next section is too large, the current section must be used.
- // Hence, save the cost, as we might have to use it.
- current=fact.values[0]+fact.values[1]*size;
- }
- }
- XBT_DEBUG("or : %f > %ld return %f", size, fact.factor, current);
-
- return current;
-}
-
-double smpi_mpi_wtime(){
- double time;
- if (smpi_process_initialized() && !smpi_process_finalized() && !smpi_process_get_sampling()) {
- smpi_bench_end();
- time = SIMIX_get_clock();
- // to avoid deadlocks if used as a break condition, such as
- // while (MPI_Wtime(...) < time_limit) {
- // ....
- // }
- // because the time will not normally advance when only calls to MPI_Wtime
- // are made -> deadlock (MPI_Wtime never reaches the time limit)
- if(smpi_wtime_sleep > 0) simcall_process_sleep(smpi_wtime_sleep);
- smpi_bench_begin();
- } else {
- time = SIMIX_get_clock();
- }
- return time;
-}
-
-static MPI_Request build_request(void *buf, int count,
- MPI_Datatype datatype, int src, int dst,
- int tag, MPI_Comm comm, unsigned flags)
-{
- MPI_Request request = NULL;
-
- void *old_buf = NULL;
-
- request = xbt_new(s_smpi_mpi_request_t, 1);
-
- s_smpi_subtype_t *subtype = datatype->substruct;
-
- if(((flags & RECV) && (flags & ACCUMULATE)) || (datatype->has_subtype == 1)){
- // This part handles the problem of non-contiguous memory
- old_buf = buf;
- buf = count==0 ? NULL : xbt_malloc(count*smpi_datatype_size(datatype));
- if ((datatype->has_subtype == 1) && (flags & SEND)) {
- subtype->serialize(old_buf, buf, count, datatype->substruct);
- }
- }
-
- request->buf = buf;
- // This part handles the problem of non-contiguous memory (for the
- // unserialisation at the reception)
- request->old_buf = old_buf;
- request->old_type = datatype;
-
- request->size = smpi_datatype_size(datatype) * count;
- request->src = src;
- request->dst = dst;
- request->tag = tag;
- request->comm = comm;
- request->action = NULL;
- request->flags = flags;
- request->detached = 0;
- request->detached_sender = NULL;
- request->real_src = 0;
-
- request->truncated = 0;
- request->real_size = 0;
- request->real_tag = 0;
- if(flags & PERSISTENT)
- request->refcount = 1;
- else
- request->refcount = 0;
- request->op = MPI_REPLACE;
- request->send = 0;
- request->recv = 0;
- if (flags & SEND) smpi_datatype_unuse(datatype);
-
- return request;
-}
-
-
-void smpi_empty_status(MPI_Status * status)
-{
- if(status != MPI_STATUS_IGNORE) {
- status->MPI_SOURCE = MPI_ANY_SOURCE;
- status->MPI_TAG = MPI_ANY_TAG;
- status->MPI_ERROR = MPI_SUCCESS;
- status->count=0;
- }
-}
-
-static void smpi_mpi_request_free_voidp(void* request)
-{
- MPI_Request req = request;
- smpi_mpi_request_free(&req);
-}
-
-/* MPI Low level calls */
-MPI_Request smpi_mpi_send_init(void *buf, int count, MPI_Datatype datatype,
- int dst, int tag, MPI_Comm comm)
-{
- MPI_Request request = NULL; /* MC needs the comm to be set to NULL during the call */
- request = build_request(buf==MPI_BOTTOM ? (void*)0 : buf, count, datatype, smpi_process_index(), smpi_group_index(smpi_comm_group(comm), dst), tag,
- comm, PERSISTENT | SEND | PREPARED);
- return request;
-}
-
-MPI_Request smpi_mpi_ssend_init(void *buf, int count, MPI_Datatype datatype,
- int dst, int tag, MPI_Comm comm)
-{
- MPI_Request request = NULL; /* MC needs the comm to be set to NULL during the call */
- request = build_request(buf==MPI_BOTTOM ? (void*)0 : buf, count, datatype, smpi_process_index(), smpi_group_index(smpi_comm_group(comm), dst), tag,
- comm, PERSISTENT | SSEND | SEND | PREPARED);
- return request;
-}
-
-MPI_Request smpi_mpi_recv_init(void *buf, int count, MPI_Datatype datatype,
- int src, int tag, MPI_Comm comm)
-{
- MPI_Request request = NULL; /* MC needs the comm to be set to NULL during the call */
- request = build_request(buf==MPI_BOTTOM ? (void*)0 : buf, count, datatype, src == MPI_ANY_SOURCE ? MPI_ANY_SOURCE : smpi_group_index(smpi_comm_group(comm), src), smpi_process_index(), tag,
- comm, PERSISTENT | RECV | PREPARED);
- return request;
-}
-
-void smpi_mpi_start(MPI_Request request)
-{
- smx_rdv_t mailbox;
-
- xbt_assert(!request->action, "Cannot (re)start a non-finished communication");
- request->flags &= ~PREPARED;
- request->flags &= ~FINISHED;
- request->refcount++;
-
- if (request->flags & RECV) {
- print_request("New recv", request);
-
- int async_small_thresh = sg_cfg_get_int("smpi/async_small_thresh");
-
- xbt_mutex_t mut = smpi_process_mailboxes_mutex();
- if (async_small_thresh != 0 ||request->flags & RMA)
- xbt_mutex_acquire(mut);
-
- if (async_small_thresh == 0 && !(request->flags & RMA)) {
- mailbox = smpi_process_mailbox();
- }
- else if (request->flags & RMA || request->size < async_small_thresh){
- //We have to check both mailboxes (because SSEND messages are sent to the large mbox). begin with the more appropriate one : the small one.
- mailbox = smpi_process_mailbox_small();
- XBT_DEBUG("Is there a corresponding send already posted in the small mailbox %p (in case of SSEND)?", mailbox);
- smx_synchro_t action = simcall_comm_iprobe(mailbox, 0, request->src,request->tag, &match_recv, (void*)request);
-
- if(action ==NULL){
- mailbox = smpi_process_mailbox();
- XBT_DEBUG("No, nothing in the small mailbox test the other one : %p", mailbox);
- action = simcall_comm_iprobe(mailbox, 0, request->src,request->tag, &match_recv, (void*)request);
- if(action ==NULL){
- XBT_DEBUG("Still nothing, switch back to the small mailbox : %p", mailbox);
- mailbox = smpi_process_mailbox_small();
- }
- }else{
- XBT_DEBUG("yes there was something for us in the large mailbox");
- }
- }else{
- mailbox = smpi_process_mailbox_small();
- XBT_DEBUG("Is there a corresponding send already posted the small mailbox?");
- smx_synchro_t action = simcall_comm_iprobe(mailbox, 0, request->src,request->tag, &match_recv, (void*)request);
-
- if(action ==NULL){
- XBT_DEBUG("No, nothing in the permanent receive mailbox");
- mailbox = smpi_process_mailbox();
- }else{
- XBT_DEBUG("yes there was something for us in the small mailbox");
- }
- }
-
- //integrate pseudo-timing for buffering of small messages, do not bother to execute the simcall if 0
- double sleeptime = request->detached ? smpi_or(request->size) : 0.0;
- if(sleeptime!=0.0){
- simcall_process_sleep(sleeptime);
- XBT_DEBUG("receiving size of %zu : sleep %f ", request->size, smpi_or(request->size));
- }
-
- // we make a copy here, as the size is modified by simix, and we may reuse the request in another receive later
- request->real_size=request->size;
- smpi_datatype_use(request->old_type);
- smpi_comm_use(request->comm);
- request->action = simcall_comm_irecv(SIMIX_process_self(), mailbox, request->buf,
- &request->real_size, &match_recv,
- !smpi_process_get_replaying()? &smpi_comm_copy_buffer_callback
- : &smpi_comm_null_copy_buffer_callback,
- request, -1.0);
- XBT_DEBUG("recv simcall posted");
-
- if (async_small_thresh != 0 || request->flags & RMA)
- xbt_mutex_release(mut);
- } else {
-
-
- int receiver = request->dst;
-
- int rank = request->src;
- if (TRACE_smpi_view_internals()) {
- TRACE_smpi_send(rank, rank, receiver,request->size);
- }
- print_request("New send", request);
-
- //if we are giving back the control to the user without waiting for completion, we have to inject timings
- double sleeptime = 0.0;
- if(request->detached || (request->flags & (ISEND|SSEND))){// issend should be treated as isend
- //isend and send timings may be different
- sleeptime = (request->flags & ISEND)? smpi_ois(request->size) : smpi_os(request->size);
- }
-
- if(sleeptime != 0.0){
- simcall_process_sleep(sleeptime);
- XBT_DEBUG("sending size of %zu : sleep %f ", request->size, smpi_os(request->size));
- }
-
- int async_small_thresh = sg_cfg_get_int("smpi/async_small_thresh");
-
- xbt_mutex_t mut=smpi_process_remote_mailboxes_mutex(receiver);
-
- if (async_small_thresh != 0 || request->flags & RMA)
- xbt_mutex_acquire(mut);
-
- if (!(async_small_thresh != 0 || request->flags & RMA)) {
- mailbox = smpi_process_remote_mailbox(receiver);
- }
- else if (request->flags & RMA || request->size < async_small_thresh) { // eager mode
- mailbox = smpi_process_remote_mailbox(receiver);
- XBT_DEBUG("Is there a corresponding recv already posted in the large mailbox %p?", mailbox);
- smx_synchro_t action = simcall_comm_iprobe(mailbox, 1,request->dst, request->tag, &match_send, (void*)request);
- if(action ==NULL){
- if (! (request->flags & SSEND)){
- mailbox = smpi_process_remote_mailbox_small(receiver);
- XBT_DEBUG("No, nothing in the large mailbox, message is to be sent on the small one %p", mailbox);
- } else{
- mailbox = smpi_process_remote_mailbox_small(receiver);
- XBT_DEBUG("SSEND : Is there a corresponding recv already posted in the small mailbox %p?", mailbox);
- action = simcall_comm_iprobe(mailbox, 1,request->dst, request->tag, &match_send, (void*)request);
- if(action ==NULL){
- XBT_DEBUG("No, we are first, send to large mailbox");
- mailbox = smpi_process_remote_mailbox(receiver);
- }
- }
- }else{
- XBT_DEBUG("Yes there was something for us in the large mailbox");
- }
- }else{
- mailbox = smpi_process_remote_mailbox(receiver);
- XBT_DEBUG("Send request %p is in the large mailbox %p (buf: %p)",mailbox, request,request->buf);
- }
-
- void* buf = request->buf;
- if ( (! (request->flags & SSEND)) && (request->size < sg_cfg_get_int("smpi/send_is_detached_thresh"))) {
- void *oldbuf = NULL;
- request->detached = 1;
- XBT_DEBUG("Send request %p is detached", request);
- request->refcount++;
- if(request->old_type->has_subtype == 0){
- oldbuf = request->buf;
- if (!smpi_process_get_replaying() && oldbuf && request->size!=0){
- if((smpi_privatize_global_variables)
- && ((char*) request->buf >= smpi_start_data_exe)
- && ((char*)request->buf < smpi_start_data_exe + smpi_size_data_exe )){
- XBT_DEBUG("Privatization : We are sending from a zone inside global memory. Switch data segment ");
- smpi_switch_data_segment(request->src);
- }
- buf = xbt_malloc(request->size);
- memcpy(buf,oldbuf,request->size);
- XBT_DEBUG("buf %p copied into %p",oldbuf,buf);
- }
- }
- }
-
- // we make a copy here, as the size is modified by simix, and we may reuse the request in another receive later
- request->real_size=request->size;
- smpi_datatype_use(request->old_type);
- smpi_comm_use(request->comm);
- request->action =
- simcall_comm_isend(SIMIX_process_from_PID(request->src+1), mailbox, request->size, -1.0,
- buf, request->real_size,
- &match_send,
- &xbt_free_f, // how to free the userdata if a detached send fails
- !smpi_process_get_replaying()? &smpi_comm_copy_buffer_callback
- : &smpi_comm_null_copy_buffer_callback,
- request,
- // detach if msg size < eager/rdv switch limit
- request->detached);
- XBT_DEBUG("send simcall posted");
-
-
-
- /* FIXME: detached sends are not traceable (request->action == NULL) */
- if (request->action)
- simcall_set_category(request->action, TRACE_internal_smpi_get_category());
-
- if (async_small_thresh != 0 || request->flags & RMA)
- xbt_mutex_release(mut);
- }
-
-}
-
-void smpi_mpi_startall(int count, MPI_Request * requests)
-{
- int i;
- if(requests==NULL) return;
-
- for(i = 0; i < count; i++) {
- smpi_mpi_start(requests[i]);
- }
-}
-
-void smpi_mpi_request_free(MPI_Request * request)
-{
- if((*request) != MPI_REQUEST_NULL){
- (*request)->refcount--;
- if((*request)->refcount<0) xbt_die("wrong refcount");
-
- if((*request)->refcount==0){
- print_request("Destroying", (*request));
- xbt_free(*request);
- *request = MPI_REQUEST_NULL;
- }else{
- print_request("Decrementing", (*request));
- }
- }else{
- xbt_die("freeing an already free request");
- }
-}
-
-
-MPI_Request smpi_rma_send_init(void *buf, int count, MPI_Datatype datatype,
- int src, int dst, int tag, MPI_Comm comm, MPI_Op op)
-{
- MPI_Request request = NULL; /* MC needs the comm to be set to NULL during the call */
- if(op==MPI_OP_NULL){
- request = build_request(buf==MPI_BOTTOM ? (void*)0 : buf , count, datatype, src, dst, tag,
- comm, RMA | NON_PERSISTENT | ISEND | SEND | PREPARED);
- }else{
- request = build_request(buf==MPI_BOTTOM ? (void*)0 : buf, count, datatype, src, dst, tag,
- comm, RMA | NON_PERSISTENT | ISEND | SEND | PREPARED | ACCUMULATE);
- request->op = op;
- }
- return request;
-}
-
-MPI_Request smpi_rma_recv_init(void *buf, int count, MPI_Datatype datatype,
- int src, int dst, int tag, MPI_Comm comm, MPI_Op op)
-{
- MPI_Request request = NULL; /* MC needs the comm to be set to NULL during the call */
- if(op==MPI_OP_NULL){
- request = build_request(buf==MPI_BOTTOM ? (void*)0 : buf, count, datatype, src, dst, tag,
- comm, RMA | NON_PERSISTENT | RECV | PREPARED);
- }else{
- request = build_request(buf==MPI_BOTTOM ? (void*)0 : buf, count, datatype, src, dst, tag,
- comm, RMA | NON_PERSISTENT | RECV | PREPARED | ACCUMULATE);
- request->op = op;
- }
- return request;
-}
-
-
-MPI_Request smpi_isend_init(void *buf, int count, MPI_Datatype datatype,
- int dst, int tag, MPI_Comm comm)
-{
- MPI_Request request = NULL; /* MC needs the comm to be set to NULL during the call */
- request = build_request(buf==MPI_BOTTOM ? (void*)0 : buf , count, datatype, smpi_process_index(), smpi_group_index(smpi_comm_group(comm), dst), tag,
- comm, PERSISTENT | ISEND | SEND | PREPARED);
- return request;
-}
-
-MPI_Request smpi_mpi_isend(void *buf, int count, MPI_Datatype datatype,
- int dst, int tag, MPI_Comm comm)
-{
- MPI_Request request = NULL; /* MC needs the comm to be set to NULL during the call */
- request = build_request(buf==MPI_BOTTOM?(void*)0:buf, count, datatype, smpi_process_index(), smpi_group_index(smpi_comm_group(comm), dst), tag,
- comm, NON_PERSISTENT | ISEND | SEND);
- smpi_mpi_start(request);
- return request;
-}
-
-MPI_Request smpi_mpi_issend(void *buf, int count, MPI_Datatype datatype,
- int dst, int tag, MPI_Comm comm)
-{
- MPI_Request request = NULL; /* MC needs the comm to be set to NULL during the call */
- request = build_request(buf==MPI_BOTTOM ? (void*)0 : buf, count, datatype, smpi_process_index(), smpi_group_index(smpi_comm_group(comm), dst), tag,
- comm, NON_PERSISTENT | ISEND | SSEND | SEND);
- smpi_mpi_start(request);
- return request;
-}
-
-MPI_Request smpi_irecv_init(void *buf, int count, MPI_Datatype datatype,
- int src, int tag, MPI_Comm comm)
-{
- MPI_Request request = NULL; /* MC needs the comm to be set to NULL during the call */
- request = build_request(buf==MPI_BOTTOM ? (void*)0 : buf, count, datatype, src == MPI_ANY_SOURCE ? MPI_ANY_SOURCE : smpi_group_index(smpi_comm_group(comm), src), smpi_process_index(), tag,
- comm, PERSISTENT | RECV | PREPARED);
- return request;
-}
-
-MPI_Request smpi_mpi_irecv(void *buf, int count, MPI_Datatype datatype,
- int src, int tag, MPI_Comm comm)
-{
- MPI_Request request = NULL; /* MC needs the comm to be set to NULL during the call */
- request = build_request(buf==MPI_BOTTOM ? (void*)0 : buf, count, datatype, src == MPI_ANY_SOURCE ? MPI_ANY_SOURCE : smpi_group_index(smpi_comm_group(comm), src), smpi_process_index(), tag,
- comm, NON_PERSISTENT | RECV);
- smpi_mpi_start(request);
- return request;
-}
-
-void smpi_mpi_recv(void *buf, int count, MPI_Datatype datatype, int src,
- int tag, MPI_Comm comm, MPI_Status * status)
-{
- MPI_Request request = NULL; /* MC needs the comm to be set to NULL during the call */
- request = smpi_mpi_irecv(buf, count, datatype, src, tag, comm);
- smpi_mpi_wait(&request, status);
- request = NULL;
-}
-
-
-
-void smpi_mpi_send(void *buf, int count, MPI_Datatype datatype, int dst,
- int tag, MPI_Comm comm)
-{
- MPI_Request request = NULL; /* MC needs the comm to be set to NULL during the call */
- request = build_request(buf==MPI_BOTTOM ? (void*)0 : buf, count, datatype, smpi_process_index(), smpi_group_index(smpi_comm_group(comm), dst), tag,
- comm, NON_PERSISTENT | SEND);
-
- smpi_mpi_start(request);
- smpi_mpi_wait(&request, MPI_STATUS_IGNORE);
- request = NULL;
-}
-
-void smpi_mpi_ssend(void *buf, int count, MPI_Datatype datatype,
- int dst, int tag, MPI_Comm comm)
-{
- MPI_Request request = NULL; /* MC needs the comm to be set to NULL during the call */
- request = build_request(buf==MPI_BOTTOM ? (void*)0 : buf, count, datatype, smpi_process_index(), smpi_group_index(smpi_comm_group(comm), dst), tag,
- comm, NON_PERSISTENT | SSEND | SEND);
-
- smpi_mpi_start(request);
- smpi_mpi_wait(&request, MPI_STATUS_IGNORE);
- request = NULL;
-}
-
-void smpi_mpi_sendrecv(void *sendbuf, int sendcount, MPI_Datatype sendtype,
- int dst, int sendtag, void *recvbuf, int recvcount,
- MPI_Datatype recvtype, int src, int recvtag,
- MPI_Comm comm, MPI_Status * status)
-{
- MPI_Request requests[2];
- MPI_Status stats[2];
- int myid=smpi_process_index();
- if ((smpi_group_index(smpi_comm_group(comm), dst) == myid) && (smpi_group_index(smpi_comm_group(comm), src) == myid)) {
- smpi_datatype_copy(sendbuf, sendcount, sendtype,
- recvbuf, recvcount, recvtype);
- return;
- }
- requests[0] =
- smpi_isend_init(sendbuf, sendcount, sendtype, dst, sendtag, comm);
- requests[1] =
- smpi_irecv_init(recvbuf, recvcount, recvtype, src, recvtag, comm);
- smpi_mpi_startall(2, requests);
- smpi_mpi_waitall(2, requests, stats);
- smpi_mpi_request_free(&requests[0]);
- smpi_mpi_request_free(&requests[1]);
- if(status != MPI_STATUS_IGNORE) {
- // Copy receive status
- *status = stats[1];
- }
-}
-
-int smpi_mpi_get_count(MPI_Status * status, MPI_Datatype datatype)
-{
- return status->count / smpi_datatype_size(datatype);
-}
-
-static void finish_wait(MPI_Request * request, MPI_Status * status)
-{
- MPI_Request req = *request;
- smpi_empty_status(status);
-
- if(!(req->detached && req->flags & SEND)
- && !(req->flags & PREPARED)){
- if(status != MPI_STATUS_IGNORE) {
- int src = req->src == MPI_ANY_SOURCE ? req->real_src : req->src;
- status->MPI_SOURCE = smpi_group_rank(smpi_comm_group(req->comm), src);
- status->MPI_TAG = req->tag == MPI_ANY_TAG ? req->real_tag : req->tag;
- status->MPI_ERROR = req->truncated ? MPI_ERR_TRUNCATE : MPI_SUCCESS;
- // this handles the case were size in receive differs from size in send
- // FIXME: really this should just contain the count of receive-type blocks,
- // right?
- status->count = req->real_size;
- }
-
- print_request("Finishing", req);
- MPI_Datatype datatype = req->old_type;
-
- if((req->flags & ACCUMULATE) || (datatype->has_subtype == 1)){
- if (!smpi_process_get_replaying()){
- if( smpi_privatize_global_variables
- && ((char*)req->old_buf >= smpi_start_data_exe)
- && ((char*)req->old_buf < smpi_start_data_exe + smpi_size_data_exe )
- ){
- XBT_VERB("Privatization : We are unserializing to a zone in global memory - Switch data segment ");
- smpi_switch_data_segment(smpi_process_index());
- }
- }
-
- if(datatype->has_subtype == 1){
- // This part handles the problem of non-contignous memory
- // the unserialization at the reception
- s_smpi_subtype_t *subtype = datatype->substruct;
- if(req->flags & RECV)
- subtype->unserialize(req->buf, req->old_buf, req->real_size/smpi_datatype_size(datatype) , datatype->substruct, req->op);
- if(req->detached == 0) free(req->buf);
- }else if(req->flags & RECV){//apply op on contiguous buffer for accumulate
- int n =req->real_size/smpi_datatype_size(datatype);
- smpi_op_apply(req->op, req->buf, req->old_buf, &n, &datatype);
- }
- }
- smpi_comm_unuse(req->comm);
- smpi_datatype_unuse(datatype);
-
- }
-
- if (TRACE_smpi_view_internals()) {
- if(req->flags & RECV){
- int rank = smpi_process_index();
- int src_traced = (req->src == MPI_ANY_SOURCE ? req->real_src : req->src);
- TRACE_smpi_recv(rank, src_traced, rank);
- }
- }
-
- if(req->detached_sender!=NULL){
- smpi_mpi_request_free(&(req->detached_sender));
- }
- if(req->flags & PERSISTENT)
- req->action = NULL;
- req->flags |= FINISHED;
-
- smpi_mpi_request_free(request);
-
-}
-
-int smpi_mpi_test(MPI_Request * request, MPI_Status * status) {
- int flag;
-
- //assume that request is not MPI_REQUEST_NULL (filtered in PMPI_Test or smpi_mpi_testall before)
-
- // to avoid deadlocks if used as a break condition, such as
- // while (MPI_Test(request, flag, status) && flag) {
- // }
- // because the time will not normally advance when only calls to MPI_Test
- // are made -> deadlock
- // multiplier to the sleeptime, to increase speed of execution, each failed test will increase it
- static int nsleeps = 1;
- if(smpi_test_sleep > 0) simcall_process_sleep(nsleeps*smpi_test_sleep);
-
- smpi_empty_status(status);
- flag = 1;
- if (!((*request)->flags & PREPARED)) {
- if ((*request)->action != NULL)
- flag = simcall_comm_test((*request)->action);
- if (flag) {
- finish_wait(request, status);
- nsleeps=1;//reset the number of sleeps we will do next time
- if (*request != MPI_REQUEST_NULL && !((*request)->flags & PERSISTENT))
- *request = MPI_REQUEST_NULL;
- }else{
- nsleeps++;
- }
- }
- return flag;
-}
-
-int smpi_mpi_testany(int count, MPI_Request requests[], int *index,
- MPI_Status * status)
-{
- xbt_dynar_t comms;
- int i, flag, size;
- int* map;
-
- *index = MPI_UNDEFINED;
- flag = 0;
- comms = xbt_dynar_new(sizeof(smx_synchro_t), NULL);
- map = xbt_new(int, count);
- size = 0;
- for(i = 0; i < count; i++) {
- if ((requests[i] != MPI_REQUEST_NULL) && requests[i]->action &&
- !(requests[i]->flags & PREPARED)) {
- xbt_dynar_push(comms, &requests[i]->action);
- map[size] = i;
- size++;
- }
- }
- if(size > 0) {
- //multiplier to the sleeptime, to increase speed of execution, each failed testany will increase it
- static int nsleeps = 1;
- if(smpi_test_sleep > 0) simcall_process_sleep(nsleeps*smpi_test_sleep);
-
- i = simcall_comm_testany(comms);
- // not MPI_UNDEFINED, as this is a simix return code
- if(i != -1) {
- *index = map[i];
- finish_wait(&requests[*index], status);
- if (requests[*index] != MPI_REQUEST_NULL && (requests[*index]->flags & NON_PERSISTENT))
- requests[*index] = MPI_REQUEST_NULL;
- flag = 1;
- nsleeps=1;
- }else{
- nsleeps++;
- }
- }else{
- //all requests are null or inactive, return true
- flag=1;
- smpi_empty_status(status);
- }
- xbt_free(map);
- xbt_dynar_free(&comms);
-
- return flag;
-}
-
-
-int smpi_mpi_testall(int count, MPI_Request requests[],
- MPI_Status status[])
-{
- MPI_Status stat;
- MPI_Status *pstat = status == MPI_STATUSES_IGNORE ? MPI_STATUS_IGNORE : &stat;
- int flag=1;
- int i;
- for(i=0; i<count; i++){
- if (requests[i] != MPI_REQUEST_NULL && !(requests[i]->flags & PREPARED)) {
- if (smpi_mpi_test(&requests[i], pstat)!=1){
- flag=0;
- }else{
- requests[i]=MPI_REQUEST_NULL;
- }
- }else{
- smpi_empty_status(pstat);
- }
- if(status != MPI_STATUSES_IGNORE) {
- status[i] = *pstat;
- }
- }
- return flag;
-}
-
-void smpi_mpi_probe(int source, int tag, MPI_Comm comm, MPI_Status* status){
- int flag=0;
- //FIXME find another wait to avoid busy waiting ?
- // the issue here is that we have to wait on a nonexistent comm
- while(flag==0){
- smpi_mpi_iprobe(source, tag, comm, &flag, status);
- XBT_DEBUG("Busy Waiting on probing : %d", flag);
- }
-}
-
-void smpi_mpi_iprobe(int source, int tag, MPI_Comm comm, int* flag, MPI_Status* status){
-
- MPI_Request request =build_request(NULL, 0, MPI_CHAR, source == MPI_ANY_SOURCE ? MPI_ANY_SOURCE : smpi_group_index(smpi_comm_group(comm), source), smpi_comm_rank(comm), tag,
- comm, PERSISTENT | RECV);
-
- // to avoid deadlock, we have to sleep some time here, or the timer won't advance and we will only do iprobe simcalls
- // (especially when used as a break condition, such as while(MPI_Iprobe(...)) ... )
- // multiplier to the sleeptime, to increase speed of execution, each failed iprobe will increase it
- static int nsleeps = 1;
- if(smpi_iprobe_sleep > 0) simcall_process_sleep(nsleeps*smpi_iprobe_sleep);
- // behave like a receive, but don't do it
- smx_rdv_t mailbox;
-
- print_request("New iprobe", request);
- // We have to test both mailboxes as we don't know if we will receive one one or another
- if (sg_cfg_get_int("smpi/async_small_thresh")>0){
- mailbox = smpi_process_mailbox_small();
- XBT_DEBUG("trying to probe the perm recv mailbox");
- request->action = simcall_comm_iprobe(mailbox, 0, request->src, request->tag, &match_recv, (void*)request);
- }
- if (request->action==NULL){
- mailbox = smpi_process_mailbox();
- XBT_DEBUG("trying to probe the other mailbox");
- request->action = simcall_comm_iprobe(mailbox, 0, request->src,request->tag, &match_recv, (void*)request);
- }
-
- if (request->action){
- MPI_Request req = (MPI_Request)SIMIX_comm_get_src_data(request->action);
- *flag = 1;
- if(status != MPI_STATUS_IGNORE && !(req->flags & PREPARED)) {
- status->MPI_SOURCE = smpi_group_rank(smpi_comm_group(comm), req->src);
- status->MPI_TAG = req->tag;
- status->MPI_ERROR = MPI_SUCCESS;
- status->count = req->real_size;
- }
- nsleeps=1;//reset the number of sleeps we will do next time
- }
- else {
- *flag = 0;
- nsleeps++;
- }
- smpi_mpi_request_free(&request);
-
- return;
-}
-
-void smpi_mpi_wait(MPI_Request * request, MPI_Status * status)
-{
- print_request("Waiting", *request);
- if ((*request)->flags & PREPARED) {
- smpi_empty_status(status);
- return;
- }
-
- if ((*request)->action != NULL) { // this is not a detached send
- simcall_comm_wait((*request)->action, -1.0);
-
- if((MC_is_active() || MC_record_replay_is_active()) && (*request)->action)
- (*request)->action->comm.dst_data = NULL; // dangling pointer : dst_data is freed with a wait, need to set it to NULL for system state comparison
- }
-
- finish_wait(request, status);
- if (*request != MPI_REQUEST_NULL && ((*request)->flags & NON_PERSISTENT))
- *request = MPI_REQUEST_NULL;
- // FIXME for a detached send, finish_wait is not called:
-}
-
-int smpi_mpi_waitany(int count, MPI_Request requests[],
- MPI_Status * status)
-{
- xbt_dynar_t comms;
- int i, size, index;
- int *map;
-
- index = MPI_UNDEFINED;
- if(count > 0) {
- // Wait for a request to complete
- comms = xbt_dynar_new(sizeof(smx_synchro_t), NULL);
- map = xbt_new(int, count);
- size = 0;
- XBT_DEBUG("Wait for one of %d", count);
- for(i = 0; i < count; i++) {
- if (requests[i] != MPI_REQUEST_NULL
- && !(requests[i]->flags & PREPARED)
- && !(requests[i]->flags & FINISHED)) {
- if (requests[i]->action != NULL) {
- XBT_DEBUG("Waiting any %p ", requests[i]);
- xbt_dynar_push(comms, &requests[i]->action);
- map[size] = i;
- size++;
- }else{
- //This is a finished detached request, let's return this one
- size=0;//so we free the dynar but don't do the waitany call
- index=i;
- finish_wait(&requests[i], status);//cleanup if refcount = 0
- if (requests[i] != MPI_REQUEST_NULL && (requests[i]->flags & NON_PERSISTENT))
- requests[i]=MPI_REQUEST_NULL;//set to null
- break;
- }
- }
- }
- if(size > 0) {
- i = simcall_comm_waitany(comms);
-
- // not MPI_UNDEFINED, as this is a simix return code
- if (i != -1) {
- index = map[i];
- finish_wait(&requests[index], status);
- if (requests[i] != MPI_REQUEST_NULL && (requests[i]->flags & NON_PERSISTENT))
- requests[index] = MPI_REQUEST_NULL;
- }
- }
- xbt_free(map);
- xbt_dynar_free(&comms);
- }
-
- if (index==MPI_UNDEFINED)
- smpi_empty_status(status);
-
- return index;
-}
-
-int smpi_mpi_waitall(int count, MPI_Request requests[],
- MPI_Status status[])
-{
- int index, c;
- MPI_Status stat;
- MPI_Status *pstat = status == MPI_STATUSES_IGNORE ? MPI_STATUS_IGNORE : &stat;
- int retvalue = MPI_SUCCESS;
- //tag invalid requests in the set
- if (status != MPI_STATUSES_IGNORE) {
- for (c = 0; c < count; c++) {
- if (requests[c] == MPI_REQUEST_NULL || requests[c]->dst == MPI_PROC_NULL ||
- (requests[c]->flags & PREPARED)) {
- smpi_empty_status(&status[c]);
- } else if (requests[c]->src == MPI_PROC_NULL) {
- smpi_empty_status(&status[c]);
- status[c].MPI_SOURCE = MPI_PROC_NULL;
- }
- }
- }
- for(c = 0; c < count; c++) {
-
- if (MC_is_active() || MC_record_replay_is_active()) {
- smpi_mpi_wait(&requests[c], pstat);
- index = c;
- } else {
- index = smpi_mpi_waitany(count, requests, pstat);
- if (index == MPI_UNDEFINED)
- break;
- if (requests[index] != MPI_REQUEST_NULL && (requests[index]->flags & NON_PERSISTENT))
- requests[index]=MPI_REQUEST_NULL;
- }
- if (status != MPI_STATUSES_IGNORE) {
- status[index] = *pstat;
- if (status[index].MPI_ERROR == MPI_ERR_TRUNCATE)
- retvalue = MPI_ERR_IN_STATUS;
- }
- }
-
- return retvalue;
-}
-
-int smpi_mpi_waitsome(int incount, MPI_Request requests[], int *indices,
- MPI_Status status[])
-{
- int i, count, index;
- MPI_Status stat;
- MPI_Status *pstat = status == MPI_STATUSES_IGNORE ? MPI_STATUS_IGNORE : &stat;
-
- count = 0;
- for(i = 0; i < incount; i++)
- {
- index=smpi_mpi_waitany(incount, requests, pstat);
- if(index!=MPI_UNDEFINED){
- indices[count] = index;
- count++;
- if(status != MPI_STATUSES_IGNORE) {
- status[index] = *pstat;
- }
- if (requests[index] != MPI_REQUEST_NULL && (requests[index]->flags & NON_PERSISTENT))
- requests[index]=MPI_REQUEST_NULL;
- }else{
- return MPI_UNDEFINED;
- }
- }
- return count;
-}
-
-int smpi_mpi_testsome(int incount, MPI_Request requests[], int *indices,
- MPI_Status status[])
-{
- int i, count, count_dead;
- MPI_Status stat;
- MPI_Status *pstat = status == MPI_STATUSES_IGNORE ? MPI_STATUS_IGNORE : &stat;
-
- count = 0;
- count_dead = 0;
- for(i = 0; i < incount; i++) {
- if((requests[i] != MPI_REQUEST_NULL)) {
- if(smpi_mpi_test(&requests[i], pstat)) {
- indices[i] = 1;
- count++;
- if(status != MPI_STATUSES_IGNORE) {
- status[i] = *pstat;
- }
- if ((requests[i] != MPI_REQUEST_NULL) && requests[i]->flags & NON_PERSISTENT)
- requests[i]=MPI_REQUEST_NULL;
- }
- }else{
- count_dead++;
- }
- }
- if(count_dead==incount)return MPI_UNDEFINED;
- else return count;
-}
-
-void smpi_mpi_bcast(void *buf, int count, MPI_Datatype datatype, int root,
- MPI_Comm comm)
-{
- smpi_coll_tuned_bcast_binomial_tree(buf, count, datatype, root, comm);
-}
-
-void smpi_mpi_barrier(MPI_Comm comm)
-{
- smpi_coll_tuned_barrier_ompi_basic_linear(comm);
-}
-
-void smpi_mpi_gather(void *sendbuf, int sendcount, MPI_Datatype sendtype,
- void *recvbuf, int recvcount, MPI_Datatype recvtype,
- int root, MPI_Comm comm)
-{
- int system_tag = COLL_TAG_GATHER;
- int rank, size, src, index;
- MPI_Aint lb = 0, recvext = 0;
- MPI_Request *requests;
-
- rank = smpi_comm_rank(comm);
- size = smpi_comm_size(comm);
- if(rank != root) {
- // Send buffer to root
- smpi_mpi_send(sendbuf, sendcount, sendtype, root, system_tag, comm);
- } else {
- // FIXME: check for errors
- smpi_datatype_extent(recvtype, &lb, &recvext);
- // Local copy from root
- smpi_datatype_copy(sendbuf, sendcount, sendtype,
- (char *)recvbuf + root * recvcount * recvext, recvcount, recvtype);
- // Receive buffers from senders
- requests = xbt_new(MPI_Request, size - 1);
- index = 0;
- for(src = 0; src < size; src++) {
- if(src != root) {
- requests[index] = smpi_irecv_init((char *)recvbuf + src * recvcount * recvext,
- recvcount, recvtype,
- src, system_tag, comm);
- index++;
- }
- }
- // Wait for completion of irecv's.
- smpi_mpi_startall(size - 1, requests);
- smpi_mpi_waitall(size - 1, requests, MPI_STATUS_IGNORE);
- for(src = 0; src < size-1; src++) {
- smpi_mpi_request_free(&requests[src]);
- }
- xbt_free(requests);
- }
-}
-
-
-void smpi_mpi_reduce_scatter(void *sendbuf, void *recvbuf, int *recvcounts,
- MPI_Datatype datatype, MPI_Op op, MPI_Comm comm)
-{
- int i, size, count;
- int *displs;
- int rank = smpi_process_index();
- void *tmpbuf;
-
- /* arbitrarily choose root as rank 0 */
- size = smpi_comm_size(comm);
- count = 0;
- displs = xbt_new(int, size);
- for (i = 0; i < size; i++) {
- displs[i] = count;
- count += recvcounts[i];
- }
- tmpbuf=(void*)smpi_get_tmp_sendbuffer(count*smpi_datatype_get_extent(datatype));
-
- mpi_coll_reduce_fun(sendbuf, tmpbuf, count, datatype, op, 0, comm);
- smpi_mpi_scatterv(tmpbuf, recvcounts, displs, datatype, recvbuf,
- recvcounts[rank], datatype, 0, comm);
- xbt_free(displs);
- smpi_free_tmp_buffer(tmpbuf);
-}
-
-void smpi_mpi_gatherv(void *sendbuf, int sendcount, MPI_Datatype sendtype,
- void *recvbuf, int *recvcounts, int *displs,
- MPI_Datatype recvtype, int root, MPI_Comm comm)
-{
- int system_tag = COLL_TAG_GATHERV;
- int rank, size, src, index;
- MPI_Aint lb = 0, recvext = 0;
- MPI_Request *requests;
-
- rank = smpi_comm_rank(comm);
- size = smpi_comm_size(comm);
- if(rank != root) {
- // Send buffer to root
- smpi_mpi_send(sendbuf, sendcount, sendtype, root, system_tag, comm);
- } else {
- // FIXME: check for errors
- smpi_datatype_extent(recvtype, &lb, &recvext);
- // Local copy from root
- smpi_datatype_copy(sendbuf, sendcount, sendtype,
- (char *)recvbuf + displs[root] * recvext,
- recvcounts[root], recvtype);
- // Receive buffers from senders
- requests = xbt_new(MPI_Request, size - 1);
- index = 0;
- for(src = 0; src < size; src++) {
- if(src != root) {
- requests[index] =
- smpi_irecv_init((char *)recvbuf + displs[src] * recvext,
- recvcounts[src], recvtype, src, system_tag, comm);
- index++;
- }
- }
- // Wait for completion of irecv's.
- smpi_mpi_startall(size - 1, requests);
- smpi_mpi_waitall(size - 1, requests, MPI_STATUS_IGNORE);
- for(src = 0; src < size-1; src++) {
- smpi_mpi_request_free(&requests[src]);
- }
- xbt_free(requests);
- }
-}
-
-void smpi_mpi_allgather(void *sendbuf, int sendcount,
- MPI_Datatype sendtype, void *recvbuf,
- int recvcount, MPI_Datatype recvtype,
- MPI_Comm comm)
-{
- int system_tag = COLL_TAG_ALLGATHER;
- int rank, size, other, index;
- MPI_Aint lb = 0, recvext = 0;
- MPI_Request *requests;
-
- rank = smpi_comm_rank(comm);
- size = smpi_comm_size(comm);
- // FIXME: check for errors
- smpi_datatype_extent(recvtype, &lb, &recvext);
- // Local copy from self
- smpi_datatype_copy(sendbuf, sendcount, sendtype,
- (char *)recvbuf + rank * recvcount * recvext, recvcount,
- recvtype);
- // Send/Recv buffers to/from others;
- requests = xbt_new(MPI_Request, 2 * (size - 1));
- index = 0;
- for(other = 0; other < size; other++) {
- if(other != rank) {
- requests[index] =
- smpi_isend_init(sendbuf, sendcount, sendtype, other, system_tag,
- comm);
- index++;
- requests[index] = smpi_irecv_init((char *)recvbuf + other * recvcount * recvext,
- recvcount, recvtype, other,
- system_tag, comm);
- index++;
- }
- }
- // Wait for completion of all comms.
- smpi_mpi_startall(2 * (size - 1), requests);
- smpi_mpi_waitall(2 * (size - 1), requests, MPI_STATUS_IGNORE);
- for(other = 0; other < 2*(size-1); other++) {
- smpi_mpi_request_free(&requests[other]);
- }
- xbt_free(requests);
-}
-
-void smpi_mpi_allgatherv(void *sendbuf, int sendcount,
- MPI_Datatype sendtype, void *recvbuf,
- int *recvcounts, int *displs,
- MPI_Datatype recvtype, MPI_Comm comm)
-{
- int system_tag = COLL_TAG_ALLGATHERV;
- int rank, size, other, index;
- MPI_Aint lb = 0, recvext = 0;
- MPI_Request *requests;
-
- rank = smpi_comm_rank(comm);
- size = smpi_comm_size(comm);
- // FIXME: check for errors
- smpi_datatype_extent(recvtype, &lb, &recvext);
- // Local copy from self
- smpi_datatype_copy(sendbuf, sendcount, sendtype,
- (char *)recvbuf + displs[rank] * recvext,
- recvcounts[rank], recvtype);
- // Send buffers to others;
- requests = xbt_new(MPI_Request, 2 * (size - 1));
- index = 0;
- for(other = 0; other < size; other++) {
- if(other != rank) {
- requests[index] =
- smpi_isend_init(sendbuf, sendcount, sendtype, other, system_tag,
- comm);
- index++;
- requests[index] =
- smpi_irecv_init((char *)recvbuf + displs[other] * recvext, recvcounts[other],
- recvtype, other, system_tag, comm);
- index++;
- }
- }
- // Wait for completion of all comms.
- smpi_mpi_startall(2 * (size - 1), requests);
- smpi_mpi_waitall(2 * (size - 1), requests, MPI_STATUS_IGNORE);
- for(other = 0; other < 2*(size-1); other++) {
- smpi_mpi_request_free(&requests[other]);
- }
- xbt_free(requests);
-}
-
-void smpi_mpi_scatter(void *sendbuf, int sendcount, MPI_Datatype sendtype,
- void *recvbuf, int recvcount, MPI_Datatype recvtype,
- int root, MPI_Comm comm)
-{
- int system_tag = COLL_TAG_SCATTER;
- int rank, size, dst, index;
- MPI_Aint lb = 0, sendext = 0;
- MPI_Request *requests;
-
- rank = smpi_comm_rank(comm);
- size = smpi_comm_size(comm);
- if(rank != root) {
- // Recv buffer from root
- smpi_mpi_recv(recvbuf, recvcount, recvtype, root, system_tag, comm,
- MPI_STATUS_IGNORE);
- } else {
- // FIXME: check for errors
- smpi_datatype_extent(sendtype, &lb, &sendext);
- // Local copy from root
- if(recvbuf!=MPI_IN_PLACE){
- smpi_datatype_copy((char *)sendbuf + root * sendcount * sendext,
- sendcount, sendtype, recvbuf, recvcount, recvtype);
- }
- // Send buffers to receivers
- requests = xbt_new(MPI_Request, size - 1);
- index = 0;
- for(dst = 0; dst < size; dst++) {
- if(dst != root) {
- requests[index] = smpi_isend_init((char *)sendbuf + dst * sendcount * sendext,
- sendcount, sendtype, dst,
- system_tag, comm);
- index++;
- }
- }
- // Wait for completion of isend's.
- smpi_mpi_startall(size - 1, requests);
- smpi_mpi_waitall(size - 1, requests, MPI_STATUS_IGNORE);
- for(dst = 0; dst < size-1; dst++) {
- smpi_mpi_request_free(&requests[dst]);
- }
- xbt_free(requests);
- }
-}
-
-void smpi_mpi_scatterv(void *sendbuf, int *sendcounts, int *displs,
- MPI_Datatype sendtype, void *recvbuf, int recvcount,
- MPI_Datatype recvtype, int root, MPI_Comm comm)
-{
- int system_tag = COLL_TAG_SCATTERV;
- int rank, size, dst, index;
- MPI_Aint lb = 0, sendext = 0;
- MPI_Request *requests;
-
- rank = smpi_comm_rank(comm);
- size = smpi_comm_size(comm);
- if(rank != root) {
- // Recv buffer from root
- smpi_mpi_recv(recvbuf, recvcount, recvtype, root, system_tag, comm,
- MPI_STATUS_IGNORE);
- } else {
- // FIXME: check for errors
- smpi_datatype_extent(sendtype, &lb, &sendext);
- // Local copy from root
- if(recvbuf!=MPI_IN_PLACE){
- smpi_datatype_copy((char *)sendbuf + displs[root] * sendext, sendcounts[root],
- sendtype, recvbuf, recvcount, recvtype);
- }
- // Send buffers to receivers
- requests = xbt_new(MPI_Request, size - 1);
- index = 0;
- for(dst = 0; dst < size; dst++) {
- if(dst != root) {
- requests[index] =
- smpi_isend_init((char *)sendbuf + displs[dst] * sendext, sendcounts[dst],
- sendtype, dst, system_tag, comm);
- index++;
- }
- }
- // Wait for completion of isend's.
- smpi_mpi_startall(size - 1, requests);
- smpi_mpi_waitall(size - 1, requests, MPI_STATUS_IGNORE);
- for(dst = 0; dst < size-1; dst++) {
- smpi_mpi_request_free(&requests[dst]);
- }
- xbt_free(requests);
- }
-}
-
-void smpi_mpi_reduce(void *sendbuf, void *recvbuf, int count,
- MPI_Datatype datatype, MPI_Op op, int root,
- MPI_Comm comm)
-{
- int system_tag = COLL_TAG_REDUCE;
- int rank, size, src, index;
- MPI_Aint lb = 0, dataext = 0;
- MPI_Request *requests;
- void **tmpbufs;
-
-
- char* sendtmpbuf = (char*) sendbuf;
- if( sendbuf == MPI_IN_PLACE ) {
- sendtmpbuf = (char *)smpi_get_tmp_sendbuffer(count*smpi_datatype_get_extent(datatype));
- smpi_datatype_copy(recvbuf, count, datatype,sendtmpbuf, count, datatype);
- }
-
- rank = smpi_comm_rank(comm);
- size = smpi_comm_size(comm);
- //non commutative case, use a working algo from openmpi
- if(!smpi_op_is_commute(op)){
- smpi_coll_tuned_reduce_ompi_basic_linear(sendtmpbuf, recvbuf, count,
- datatype, op, root, comm);
- return;
- }
-
- if(rank != root) {
- // Send buffer to root
- smpi_mpi_send(sendtmpbuf, count, datatype, root, system_tag, comm);
- } else {
- // FIXME: check for errors
- smpi_datatype_extent(datatype, &lb, &dataext);
- // Local copy from root
- if (sendtmpbuf && recvbuf)
- smpi_datatype_copy(sendtmpbuf, count, datatype, recvbuf, count, datatype);
- // Receive buffers from senders
- //TODO: make a MPI_barrier here ?
- requests = xbt_new(MPI_Request, size - 1);
- tmpbufs = xbt_new(void *, size - 1);
- index = 0;
- for(src = 0; src < size; src++) {
- if(src != root) {
- // FIXME: possibly overkill we we have contiguous/noncontiguous data
- // mapping...
- if (!smpi_process_get_replaying())
- tmpbufs[index] = xbt_malloc(count * dataext);
- else
- tmpbufs[index] = smpi_get_tmp_sendbuffer(count * dataext);
- requests[index] =
- smpi_irecv_init(tmpbufs[index], count, datatype, src,
- system_tag, comm);
- index++;
- }
- }
- // Wait for completion of irecv's.
- smpi_mpi_startall(size - 1, requests);
- for(src = 0; src < size - 1; src++) {
- index = smpi_mpi_waitany(size - 1, requests, MPI_STATUS_IGNORE);
- XBT_DEBUG("finished waiting any request with index %d", index);
- if(index == MPI_UNDEFINED) {
- break;
- }else{
- smpi_mpi_request_free(&requests[index]);
- }
- if(op) /* op can be MPI_OP_NULL that does nothing */
- smpi_op_apply(op, tmpbufs[index], recvbuf, &count, &datatype);
- }
- for(index = 0; index < size - 1; index++) {
- smpi_free_tmp_buffer(tmpbufs[index]);
- }
- xbt_free(tmpbufs);
- xbt_free(requests);
-
- if( sendbuf == MPI_IN_PLACE ) {
- smpi_free_tmp_buffer(sendtmpbuf);
- }
- }
-}
-
-void smpi_mpi_allreduce(void *sendbuf, void *recvbuf, int count,
- MPI_Datatype datatype, MPI_Op op, MPI_Comm comm)
-{
- smpi_mpi_reduce(sendbuf, recvbuf, count, datatype, op, 0, comm);
- smpi_mpi_bcast(recvbuf, count, datatype, 0, comm);
-}
-
-void smpi_mpi_scan(void *sendbuf, void *recvbuf, int count,
- MPI_Datatype datatype, MPI_Op op, MPI_Comm comm)
-{
- int system_tag = -888;
- int rank, size, other, index;
- MPI_Aint lb = 0, dataext = 0;
- MPI_Request *requests;
- void **tmpbufs;
-
- rank = smpi_comm_rank(comm);
- size = smpi_comm_size(comm);
-
- // FIXME: check for errors
- smpi_datatype_extent(datatype, &lb, &dataext);
-
- // Local copy from self
- smpi_datatype_copy(sendbuf, count, datatype, recvbuf, count, datatype);
-
- // Send/Recv buffers to/from others;
- requests = xbt_new(MPI_Request, size - 1);
- tmpbufs = xbt_new(void *, rank);
- index = 0;
- for(other = 0; other < rank; other++) {
- // FIXME: possibly overkill we we have contiguous/noncontiguous data
- // mapping...
- tmpbufs[index] = smpi_get_tmp_sendbuffer(count * dataext);
- requests[index] =
- smpi_irecv_init(tmpbufs[index], count, datatype, other, system_tag,
- comm);
- index++;
- }
- for(other = rank + 1; other < size; other++) {
- requests[index] =
- smpi_isend_init(sendbuf, count, datatype, other, system_tag, comm);
- index++;
- }
- // Wait for completion of all comms.
- smpi_mpi_startall(size - 1, requests);
-
- if(smpi_op_is_commute(op)){
- for(other = 0; other < size - 1; other++) {
- index = smpi_mpi_waitany(size - 1, requests, MPI_STATUS_IGNORE);
- if(index == MPI_UNDEFINED) {
- break;
- }
- if(index < rank) {
- // #Request is below rank: it's a irecv
- smpi_op_apply(op, tmpbufs[index], recvbuf, &count, &datatype);
- }
- }
- }else{
- //non commutative case, wait in order
- for(other = 0; other < size - 1; other++) {
- smpi_mpi_wait(&(requests[other]), MPI_STATUS_IGNORE);
- if(index < rank) {
- smpi_op_apply(op, tmpbufs[other], recvbuf, &count, &datatype);
- }
- }
- }
- for(index = 0; index < rank; index++) {
- smpi_free_tmp_buffer(tmpbufs[index]);
- }
- for(index = 0; index < size-1; index++) {
- smpi_mpi_request_free(&requests[index]);
- }
- xbt_free(tmpbufs);
- xbt_free(requests);
-}
-
-void smpi_mpi_exscan(void *sendbuf, void *recvbuf, int count,
- MPI_Datatype datatype, MPI_Op op, MPI_Comm comm)
-{
- int system_tag = -888;
- int rank, size, other, index;
- MPI_Aint lb = 0, dataext = 0;
- MPI_Request *requests;
- void **tmpbufs;
- int recvbuf_is_empty=1;
- rank = smpi_comm_rank(comm);
- size = smpi_comm_size(comm);
-
- // FIXME: check for errors
- smpi_datatype_extent(datatype, &lb, &dataext);
-
- // Send/Recv buffers to/from others;
- requests = xbt_new(MPI_Request, size - 1);
- tmpbufs = xbt_new(void *, rank);
- index = 0;
- for(other = 0; other < rank; other++) {
- // FIXME: possibly overkill we we have contiguous/noncontiguous data
- // mapping...
- tmpbufs[index] = smpi_get_tmp_sendbuffer(count * dataext);
- requests[index] =
- smpi_irecv_init(tmpbufs[index], count, datatype, other, system_tag,
- comm);
- index++;
- }
- for(other = rank + 1; other < size; other++) {
- requests[index] =
- smpi_isend_init(sendbuf, count, datatype, other, system_tag, comm);
- index++;
- }
- // Wait for completion of all comms.
- smpi_mpi_startall(size - 1, requests);
- if(smpi_op_is_commute(op)){
- for(other = 0; other < size - 1; other++) {
- index = smpi_mpi_waitany(size - 1, requests, MPI_STATUS_IGNORE);
- if(index == MPI_UNDEFINED) {
- break;
- }
- if(index < rank) {
- if(recvbuf_is_empty){
- smpi_datatype_copy(tmpbufs[index], count, datatype, recvbuf, count, datatype);
- recvbuf_is_empty=0;
- }else
- // #Request is below rank: it's a irecv
- smpi_op_apply(op, tmpbufs[index], recvbuf, &count, &datatype);
- }
- }
- }else{
- //non commutative case, wait in order
- for(other = 0; other < size - 1; other++) {
- smpi_mpi_wait(&(requests[other]), MPI_STATUS_IGNORE);
- if(index < rank) {
- if(recvbuf_is_empty){
- smpi_datatype_copy(tmpbufs[other], count, datatype, recvbuf, count, datatype);
- recvbuf_is_empty=0;
- }else smpi_op_apply(op, tmpbufs[other], recvbuf, &count, &datatype);
- }
- }
- }
- for(index = 0; index < rank; index++) {
- smpi_free_tmp_buffer(tmpbufs[index]);
- }
- for(index = 0; index < size-1; index++) {
- smpi_mpi_request_free(&requests[index]);
- }
- xbt_free(tmpbufs);
- xbt_free(requests);
-}
