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2dstencil_pack_mp.c
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/****
* Copyright (c) 2011-2014, NVIDIA Corporation. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* * Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* * Neither the name of the NVIDIA Corporation nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
* THE POSSIBILITY OF SUCH DAMAGE.
****/
#include <stdio.h>
#include <cuda.h>
#include <cuda_runtime.h>
#include <mpi.h>
#include "validate.h"
#include <mp.h>
#include "pack.h"
#include <string.h>
#include <assert.h>
#include <sys/types.h>
#include <unistd.h>
#include <time.h>
#ifdef USE_PROF
#include "prof.h"
#else
struct prof { };
#define PROF(P, H) do { } while(0)
static inline int prof_init(struct prof *p, int unit_scale, int scale_factor, const char* unit_scale_str, int nbins, int merge_bins, const char *tags) {return 0;}
static inline int prof_destroy(struct prof *p) {return 0;}
static inline void prof_dump(struct prof *p) {}
static inline void prof_update(struct prof *p) {}
static inline void prof_enable(struct prof *p) {}
static inline int prof_enabled(struct prof *p) { return 0; }
static inline void prof_disable(struct prof *p) {}
static inline void prof_reset(struct prof *p) {}
#endif
/* x
* ^
* -
* -
* -
* 0 --------> y
* */
#define CUDA_CHECK(stmt) \
do { \
cudaError_t result = (stmt); \
if (cudaSuccess != result) { \
fprintf(stderr, "[%d][%d][%s:%d] cuda failed with %s \n", \
comm_rank, getpid(), __FILE__, __LINE__,cudaGetErrorString(result)); \
exit(-1); \
} \
assert(cudaSuccess == result); \
} while (0)
struct prof prof;
struct prof prof_isend_prepare;
int prof_start = 0;
int prof_idx = 0;
int tracking_events = 0;
int wait_for_key = 0;
long long int min_size = 8, max_size = 8*1024, default_boundary = 2;
int comm_size, px, py;
int comm_rank = 0, rank_coords[2], rank_base[2];
int left, right, bottom, top, peers[4];
int peer_count, req_per_step;
int sreq_max_inflight, rreq_max_inflight, steps_per_batch = 4, batches_inflight = 4, buffering = 2, prepost_depth_global = 4;
int threadsperblock = 512, gridsize = 15;
int period_value = 1, use_async = 1, use_single_stream = 0, force_stream_sync = 0;
int reps_count = 10;
static inline int intlog2(int x) {
int result = 0, temp = x;
while (temp >>= 1) result++;
return result;
}
int use_gpu_comm_buffers = 0;
int use_mpi=0;
int exchange (MPI_Comm comm2d, long long int size, int boundary, int iter_count, int iter_warmup)
{
long long int i;
int neighbors = 4;
/*application and pack buffers*/
long long int buf_size, msg_size, msg_size_bytes, packbuf_disp;
float *buf_u = NULL, *buf_v = NULL, **packbuf, **unpackbuf;
float *compute_buf, *exchange_buf, *temp;
/*counters to track requests*/
int rreq_idx, sreq_idx, wait_idx, complete_idx, rreq_inflight;
int sreq_inflight, complete_sync_inflight, complete_sync_idx, complete_sync_wait;
int complete_sreq_idx, complete_rreq_idx, prepost_depth;
/*mp specific objects*/
mp_reg_t *reg_pack, *reg_unpack;
mp_request_t *sreq = NULL, *rreq = NULL;
/*events for tracking and timing*/
cudaEvent_t start_event, stop_event;
cudaEvent_t *sendrecv_sync_event, *interior_sync_event;
long int time_start, time_stop, time_prepost;
struct timespec start, stop;
float time_elapsed;
/*streams*/
cudaStream_t interior_stream;
cudaStream_t boundary_sendrecv_stream;
/*hold constants*/
long long int boundary_log, size_log, size2_log;
/*variables used in validation*/
#ifdef _VALIDATE_
int x, y;
float *buf_u_h = NULL, *buf_v_h = NULL;
#endif
MPI_Request * mpi_sreq, * mpi_rreq;
MPI_Status * mpi_sstatus, * mpi_rstatus;
buf_size = sizeof(float)*(size+2)*(size+2);
msg_size = size;
msg_size_bytes = msg_size*sizeof(float);
/*allocating requests*/
if (use_async) {
sreq_max_inflight = req_per_step*steps_per_batch*batches_inflight;
rreq_max_inflight = req_per_step*(steps_per_batch*batches_inflight + prepost_depth_global);
} else {
sreq_max_inflight = req_per_step;
rreq_max_inflight = req_per_step*prepost_depth_global;
}
if(use_mpi == 0)
{
sreq = (mp_request_t *) malloc(sreq_max_inflight*sizeof(mp_request_t));
rreq = (mp_request_t *) malloc(rreq_max_inflight*sizeof(mp_request_t));
}
else
{
mpi_sreq = (MPI_Request *) malloc(sreq_max_inflight*sizeof(MPI_Request));
mpi_rreq = (MPI_Request *) malloc(rreq_max_inflight*sizeof(MPI_Request));
mpi_sstatus = (MPI_Status *) malloc(sreq_max_inflight*sizeof(MPI_Status));
mpi_rstatus = (MPI_Status *) malloc(rreq_max_inflight*sizeof(MPI_Status));
}
sendrecv_sync_event = (cudaEvent_t *) malloc (batches_inflight*steps_per_batch*sizeof(cudaEvent_t));
interior_sync_event = (cudaEvent_t *) malloc (batches_inflight*steps_per_batch*sizeof(cudaEvent_t));
packbuf = (float **) malloc (sizeof(float *)*buffering);
unpackbuf = (float **) malloc (sizeof(float *)*buffering);
reg_pack = (mp_reg_t *) malloc (sizeof(mp_reg_t)*buffering);
reg_unpack = (mp_reg_t *) malloc (sizeof(mp_reg_t)*buffering);
if(use_gpu_comm_buffers == 0)
{
CUDA_CHECK(cudaMallocHost((void **)&buf_u, buf_size));
CUDA_CHECK(cudaMallocHost((void **)&buf_v, buf_size));
for (i=0; i<buffering; i++) {
CUDA_CHECK(cudaMallocHost((void **)&packbuf[i], msg_size_bytes*neighbors));
if(use_mpi == 0)
mp_register(packbuf[i], msg_size_bytes*neighbors, ®_pack[i]);
CUDA_CHECK(cudaMallocHost((void **)&unpackbuf[i], msg_size_bytes*neighbors));
if(use_mpi == 0)
mp_register(unpackbuf[i], msg_size_bytes*neighbors, ®_unpack[i]);
}
}
else
{
CUDA_CHECK(cudaMalloc((void **)&buf_u, buf_size));
CUDA_CHECK(cudaMalloc((void **)&buf_v, buf_size));
for (i=0; i<buffering; i++) {
CUDA_CHECK(cudaMalloc((void **)&packbuf[i], msg_size_bytes*neighbors));
CUDA_CHECK(cudaMemset(packbuf[i], 0, msg_size_bytes*neighbors));
if(use_mpi == 0)
mp_register(packbuf[i], msg_size_bytes*neighbors, ®_pack[i]);
CUDA_CHECK(cudaMalloc((void **)&unpackbuf[i], msg_size_bytes*neighbors));
CUDA_CHECK(cudaMemset(unpackbuf[i], 0, msg_size_bytes*neighbors));
if(use_mpi == 0)
mp_register(unpackbuf[i], msg_size_bytes*neighbors, ®_unpack[i]);
}
}
#ifdef _VALIDATE_
buf_u_h = malloc (buf_size);
buf_v_h = malloc (buf_size);
memset(buf_u_h, 0, buf_size);
memset(buf_v_h, 0, buf_size);
for (x = 0; x < size; x++) {
for (y = 0; y < size; y++) {
*(buf_u_h + (x+1)*(size+2) + (y+1))
= 1.0;
*(buf_v_h + (x+1)*(size+2) + (y+1))
= 1.0;
}
}
if(use_gpu_comm_buffers == 0)
{
memcpy(buf_u, buf_u_h, buf_size);
memcpy(buf_v, buf_v_h, buf_size);
}
else
{
CUDA_CHECK(cudaMemcpy(buf_u, buf_u_h, buf_size, cudaMemcpyHostToDevice));
CUDA_CHECK(cudaMemcpy(buf_v, buf_v_h, buf_size, cudaMemcpyHostToDevice));
}
#endif
size_log = intlog2(size);
size2_log = intlog2(size*size);
boundary_log = intlog2(boundary);
copytosymbol (size, size_log, size2_log, boundary, boundary_log);
CUDA_CHECK(cudaEventCreate(&start_event));
CUDA_CHECK(cudaEventCreate(&stop_event));
for (i=0; i<batches_inflight*steps_per_batch; i++) {
CUDA_CHECK(cudaEventCreateWithFlags(&sendrecv_sync_event[i], cudaEventDisableTiming));
CUDA_CHECK(cudaEventCreateWithFlags(&interior_sync_event[i], cudaEventDisableTiming));
}
int least, greatest;
CUDA_CHECK(cudaDeviceGetStreamPriorityRange(&least, &greatest));
#ifndef _USE_NONBLOCKING_STREAMS_
CUDA_CHECK(cudaStreamCreate(&interior_stream));
CUDA_CHECK(cudaStreamCreate(&boundary_sendrecv_stream));
#else
#ifdef _USE_STREAM_PRIORITY_
CUDA_CHECK(cudaStreamCreateWithPriority(&interior_stream, cudaStreamNonBlocking, least));
CUDA_CHECK(cudaStreamCreateWithPriority(&boundary_sendrecv_stream, cudaStreamNonBlocking, greatest));
#else
CUDA_CHECK(cudaStreamCreateWithFlags(&interior_stream, cudaStreamNonBlocking));
CUDA_CHECK(cudaStreamCreateWithFlags(&boundary_sendrecv_stream, cudaStreamNonBlocking));
#endif
#endif
CUDA_CHECK(cudaDeviceSynchronize());
compute_buf = buf_u;
exchange_buf = buf_v;
rreq_idx = 0;
sreq_idx = 0;
complete_sreq_idx = 0;
complete_rreq_idx = 0;
rreq_inflight = 0;
sreq_inflight = 0;
complete_sync_inflight = 0;
complete_sync_idx = 0;
complete_sync_wait = 0;
int doublebuf_idx;
/*warmup steps*/
prepost_depth = (prepost_depth_global < iter_warmup) ? prepost_depth_global : iter_warmup;
for (i=0; i<prepost_depth; i++) {
doublebuf_idx = i%buffering;
packbuf_disp = 0;
/*y dim*/
if(use_mpi == 0)
{
if (left != MPI_PROC_NULL) {
mp_irecv((void *)(unpackbuf[doublebuf_idx] + packbuf_disp),
msg_size_bytes, left, ®_unpack[doublebuf_idx],
&rreq[rreq_idx]);
rreq_idx = (rreq_idx + 1)%rreq_max_inflight;
rreq_inflight++;
}
packbuf_disp += msg_size;
if (right != MPI_PROC_NULL) {
mp_irecv((void *)(unpackbuf[doublebuf_idx] + packbuf_disp),
msg_size_bytes, right, ®_unpack[doublebuf_idx],
&rreq[rreq_idx]);
rreq_idx = (rreq_idx + 1)%rreq_max_inflight;
rreq_inflight++;
}
packbuf_disp += msg_size;
/*x dim*/
if (bottom != MPI_PROC_NULL) {
mp_irecv((void *)(unpackbuf[doublebuf_idx] + packbuf_disp),
msg_size_bytes, bottom, ®_unpack[doublebuf_idx],
&rreq[rreq_idx]);
rreq_idx = (rreq_idx + 1)%rreq_max_inflight;
rreq_inflight++;
}
packbuf_disp += msg_size;
if (top != MPI_PROC_NULL) {
mp_irecv((void *)(unpackbuf[doublebuf_idx] + packbuf_disp),
msg_size_bytes, top, ®_unpack[doublebuf_idx],
&rreq[rreq_idx]);
rreq_idx = (rreq_idx + 1)%rreq_max_inflight;
rreq_inflight++;
}
}
else
{
if (left != MPI_PROC_NULL) {
//printf("comm_rank: %d, left: %d\n", comm_rank, left);
MPI_Irecv((void *)(unpackbuf[doublebuf_idx] + packbuf_disp),
msg_size, MPI_FLOAT, left, left, comm2d,
&mpi_rreq[rreq_idx]);
rreq_idx = (rreq_idx + 1)%rreq_max_inflight;
rreq_inflight++;
}
packbuf_disp += msg_size;
if (right != MPI_PROC_NULL) {
//printf("comm_rank: %d, right: %d\n", comm_rank, right);
MPI_Irecv((void *)(unpackbuf[doublebuf_idx] + packbuf_disp),
msg_size, MPI_FLOAT, right, right, comm2d,
&mpi_rreq[rreq_idx]);
rreq_idx = (rreq_idx + 1)%rreq_max_inflight;
rreq_inflight++;
}
packbuf_disp += msg_size;
/*x dim*/
if (bottom != MPI_PROC_NULL) {
//printf("comm_rank: %d, bottom: %d\n", comm_rank, bottom);
MPI_Irecv((void *)(unpackbuf[doublebuf_idx] + packbuf_disp),
msg_size, MPI_FLOAT, bottom, bottom, comm2d,
&mpi_rreq[rreq_idx]);
rreq_idx = (rreq_idx + 1)%rreq_max_inflight;
rreq_inflight++;
}
packbuf_disp += msg_size;
if (top != MPI_PROC_NULL) {
//printf("comm_rank: %d, top: %d\n", comm_rank, top);
MPI_Irecv((void *)(unpackbuf[doublebuf_idx] + packbuf_disp),
msg_size, MPI_FLOAT, top, top, comm2d,
&mpi_rreq[rreq_idx]);
rreq_idx = (rreq_idx + 1)%rreq_max_inflight;
rreq_inflight++;
}
}
}
MPI_Barrier(MPI_COMM_WORLD);
for (i = 0; i < iter_warmup; i++) {
//if (!i) //printf("warming up\n");
doublebuf_idx = i%buffering;
/*pack data*/
boundary_pack (packbuf[doublebuf_idx], exchange_buf, size, threadsperblock, boundary_sendrecv_stream);
/*launch interior compute*/
if (!use_single_stream)
interior_compute (compute_buf, exchange_buf, size, boundary, threadsperblock, gridsize, interior_stream);
/*post all sends*/
packbuf_disp = 0;
if (use_async) {
/*prepare and post requires requests to be contiguous, check if there is a wrap around*/
int sreq_idx_start = sreq_idx;
if ((sreq_idx_start + req_per_step) > sreq_max_inflight) {
fprintf(stderr, "sreq status array looping around in middle of a step: sreq_idx_start: %d sreq_max_inflight: %d \n",
sreq_idx_start, sreq_max_inflight);
exit(-1);
}
/*prepare all sends*/
/*y dim*/
if (right != MPI_PROC_NULL) {
mp_send_prepare((void *)(packbuf[doublebuf_idx] + packbuf_disp),
msg_size_bytes, right, ®_pack[doublebuf_idx],
&sreq[sreq_idx]);
sreq_idx = (sreq_idx + 1)%sreq_max_inflight;
sreq_inflight++;
}
packbuf_disp += msg_size;
if (left != MPI_PROC_NULL) {
mp_send_prepare((void *)(packbuf[doublebuf_idx] + packbuf_disp),
msg_size_bytes, left, ®_pack[doublebuf_idx],
&sreq[sreq_idx]);
sreq_idx = (sreq_idx + 1)%sreq_max_inflight;
sreq_inflight++;
}
packbuf_disp += msg_size;
/*x dim*/
if (top != MPI_PROC_NULL) {
mp_send_prepare((void *)(packbuf[doublebuf_idx] + packbuf_disp),
msg_size_bytes, top, ®_pack[doublebuf_idx],
&sreq[sreq_idx]);
sreq_idx = (sreq_idx + 1)%sreq_max_inflight;
sreq_inflight++;
}
packbuf_disp += msg_size;
if (bottom != MPI_PROC_NULL) {
mp_send_prepare((void *)(packbuf[doublebuf_idx] + packbuf_disp),
msg_size_bytes, bottom, ®_pack[doublebuf_idx],
&sreq[sreq_idx]);
sreq_idx = (sreq_idx + 1)%sreq_max_inflight;
sreq_inflight++;
}
/*post sends on stream*/
mp_isend_post_all_on_stream (req_per_step, &sreq[sreq_idx_start], boundary_sendrecv_stream);
/*launch interior compute*/
if (use_single_stream)
interior_compute (compute_buf, exchange_buf, size, boundary, threadsperblock, gridsize, boundary_sendrecv_stream);
/*post wait for recv on the stream*/
wait_idx = (i*req_per_step)%rreq_max_inflight;
mp_wait_all_on_stream(req_per_step, &rreq[wait_idx], boundary_sendrecv_stream);
} else {
CUDA_CHECK(cudaStreamSynchronize(boundary_sendrecv_stream));
/*launch interior compute*/
if (use_single_stream)
interior_compute (compute_buf, exchange_buf, size, boundary, threadsperblock, gridsize, boundary_sendrecv_stream);
/*post sends*/
if(use_mpi == 0)
{
/*y dim*/
if (right != MPI_PROC_NULL) {
mp_isend((void *)(packbuf[doublebuf_idx] + packbuf_disp),
msg_size_bytes, right, ®_pack[doublebuf_idx],
&sreq[sreq_idx]);
sreq_idx = (sreq_idx + 1)%sreq_max_inflight;
sreq_inflight++;
}
packbuf_disp += msg_size;
if (left != MPI_PROC_NULL) {
mp_isend((void *)(packbuf[doublebuf_idx] + packbuf_disp),
msg_size_bytes, left, ®_pack[doublebuf_idx],
&sreq[sreq_idx]);
sreq_idx = (sreq_idx + 1)%sreq_max_inflight;
sreq_inflight++;
}
packbuf_disp += msg_size;
/*x dim*/
if (top != MPI_PROC_NULL) {
mp_isend((void *)(packbuf[doublebuf_idx] + packbuf_disp),
msg_size_bytes, top, ®_pack[doublebuf_idx],
&sreq[sreq_idx]);
sreq_idx = (sreq_idx + 1)%sreq_max_inflight;
sreq_inflight++;
}
packbuf_disp += msg_size;
if (bottom != MPI_PROC_NULL) {
mp_isend((void *)(packbuf[doublebuf_idx] + packbuf_disp),
msg_size_bytes, bottom, ®_pack[doublebuf_idx],
&sreq[sreq_idx]);
sreq_idx = (sreq_idx + 1)%sreq_max_inflight;
sreq_inflight++;
}
complete_idx = 0;
while (complete_idx < req_per_step) {
complete_rreq_idx = (i%prepost_depth)*req_per_step + complete_idx;
mp_wait(&rreq[complete_rreq_idx]);
complete_idx++;
rreq_inflight--;
}
complete_idx = 0;
while (complete_idx < sreq_inflight) {
mp_wait(&sreq[complete_idx]);
complete_idx++;
}
sreq_inflight = 0;
}
else
{
/*y dim*/
if (right != MPI_PROC_NULL) {
MPI_Isend((void *)(packbuf[doublebuf_idx] + packbuf_disp),
msg_size, MPI_FLOAT, right, comm_rank, comm2d,
&mpi_sreq[sreq_idx]);
sreq_idx = (sreq_idx + 1)%sreq_max_inflight;
sreq_inflight++;
}
packbuf_disp += msg_size;
if (left != MPI_PROC_NULL) {
MPI_Isend((void *)(packbuf[doublebuf_idx] + packbuf_disp),
msg_size, MPI_FLOAT, left, comm_rank, comm2d,
&mpi_sreq[sreq_idx]);
sreq_idx = (sreq_idx + 1)%sreq_max_inflight;
sreq_inflight++;
}
packbuf_disp += msg_size;
/*x dim*/
if (top != MPI_PROC_NULL) {
MPI_Isend((void *)(packbuf[doublebuf_idx] + packbuf_disp),
msg_size, MPI_FLOAT, top, comm_rank, comm2d,
&mpi_sreq[sreq_idx]);
sreq_idx = (sreq_idx + 1)%sreq_max_inflight;
sreq_inflight++;
}
packbuf_disp += msg_size;
if (bottom != MPI_PROC_NULL) {
MPI_Isend((void *)(packbuf[doublebuf_idx] + packbuf_disp),
msg_size, MPI_FLOAT, bottom, comm_rank, comm2d,
&mpi_sreq[sreq_idx]);
sreq_idx = (sreq_idx + 1)%sreq_max_inflight;
sreq_inflight++;
}
complete_idx = 0;
while (complete_idx < req_per_step) {
complete_rreq_idx = (i%prepost_depth)*req_per_step + complete_idx;
MPI_Wait(&mpi_rreq[complete_rreq_idx], &mpi_rstatus[complete_rreq_idx]);
complete_idx++;
rreq_inflight--;
}
complete_idx = 0;
while (complete_idx < sreq_inflight) {
MPI_Wait(&mpi_sreq[complete_idx], &mpi_sstatus[complete_idx]);
complete_idx++;
}
sreq_inflight = 0;
// MPI_Waitall(rreq_idx, rreq, MPI_STATUS_IGNORE);
//MPI_Waitall(sreq_idx, sreq, MPI_STATUS_IGNORE);
}
}
/*unpack data*/
boundary_unpack (exchange_buf, unpackbuf[doublebuf_idx], size, threadsperblock, boundary_sendrecv_stream);
/*launch boundary computation*/
boundary_compute (compute_buf, exchange_buf, size, boundary, threadsperblock, gridsize, boundary_sendrecv_stream);
/*synchronize at end of each step*/
if (use_async) {
CUDA_CHECK(cudaEventRecord(sendrecv_sync_event[complete_sync_idx], boundary_sendrecv_stream));
if (!use_single_stream) {
CUDA_CHECK(cudaEventRecord(interior_sync_event[complete_sync_idx], interior_stream));
CUDA_CHECK(cudaStreamWaitEvent(boundary_sendrecv_stream, interior_sync_event[complete_sync_idx], 0));
CUDA_CHECK(cudaStreamWaitEvent(interior_stream, sendrecv_sync_event[complete_sync_idx], 0));
}
complete_sync_inflight++;
complete_sync_idx = (complete_sync_idx + 1)%(batches_inflight*steps_per_batch);
assert(complete_sync_inflight <= batches_inflight*steps_per_batch);
/*synchronize on oldest batch*/
if (complete_sync_inflight == batches_inflight*steps_per_batch) {
if (tracking_events) {
complete_sync_wait = (complete_sync_wait + steps_per_batch - 1)%(batches_inflight*steps_per_batch);
CUDA_CHECK(cudaEventSynchronize(sendrecv_sync_event[complete_sync_wait]));
if (!use_single_stream) {
CUDA_CHECK(cudaEventSynchronize(interior_sync_event[complete_sync_wait]));
}
complete_sync_wait = (complete_sync_wait + 1)%(batches_inflight*steps_per_batch);
}
complete_sync_inflight = complete_sync_inflight - steps_per_batch;
while (rreq_inflight > req_per_step*(steps_per_batch*(batches_inflight - 1) + prepost_depth)) {
mp_wait(&rreq[complete_rreq_idx]);
complete_rreq_idx = (complete_rreq_idx + 1)%rreq_max_inflight;
rreq_inflight--;
}
while (sreq_inflight > req_per_step*steps_per_batch*(batches_inflight - 1)) {
mp_wait(&sreq[complete_sreq_idx]);
complete_sreq_idx = (complete_sreq_idx + 1)%sreq_max_inflight;
sreq_inflight--;
}
}
} else {
if (!force_stream_sync) {
CUDA_CHECK(cudaDeviceSynchronize());
} else {
CUDA_CHECK(cudaEventRecord(sendrecv_sync_event[0], boundary_sendrecv_stream));
if (!use_single_stream) {
CUDA_CHECK(cudaEventRecord(interior_sync_event[0], interior_stream));
CUDA_CHECK(cudaStreamWaitEvent(boundary_sendrecv_stream, interior_sync_event[0], 0));
CUDA_CHECK(cudaStreamWaitEvent(interior_stream, sendrecv_sync_event[0], 0));
}
CUDA_CHECK(cudaEventSynchronize(sendrecv_sync_event[0]));
if (!use_single_stream) {
CUDA_CHECK(cudaEventSynchronize(interior_sync_event[0]));
}
}
}
/*prepost recv for a future step*/
if ((i+prepost_depth) < iter_warmup) {
doublebuf_idx = (i+prepost_depth)%buffering;
packbuf_disp = 0;
if(use_mpi == 0)
{
/*y dim*/
if (left != MPI_PROC_NULL) {
mp_irecv((void *)(unpackbuf[doublebuf_idx] + packbuf_disp),
msg_size_bytes, left, ®_unpack[doublebuf_idx],
&rreq[rreq_idx]);
rreq_idx = (rreq_idx + 1)%rreq_max_inflight;
rreq_inflight++;
}
packbuf_disp += msg_size;
if (right != MPI_PROC_NULL) {
mp_irecv((void *)(unpackbuf[doublebuf_idx] + packbuf_disp),
msg_size_bytes, right, ®_unpack[doublebuf_idx],
&rreq[rreq_idx]);
rreq_idx = (rreq_idx + 1)%rreq_max_inflight;
rreq_inflight++;
}
packbuf_disp += msg_size;
/*x dim*/
if (bottom != MPI_PROC_NULL) {
mp_irecv((void *)(unpackbuf[doublebuf_idx] + packbuf_disp),
msg_size_bytes, bottom, ®_unpack[doublebuf_idx],
&rreq[rreq_idx]);
rreq_idx = (rreq_idx + 1)%rreq_max_inflight;
rreq_inflight++;
}
packbuf_disp += msg_size;
if (top != MPI_PROC_NULL) {
mp_irecv((void *)(unpackbuf[doublebuf_idx] + packbuf_disp),
msg_size_bytes, top, ®_unpack[doublebuf_idx],
&rreq[rreq_idx]);
rreq_idx = (rreq_idx + 1)%rreq_max_inflight;
rreq_inflight++;
}
}
else
{
if (left != MPI_PROC_NULL) {
//printf("1 comm_rank: %d, left: %d\n", comm_rank, left);
MPI_Irecv((void *)(unpackbuf[doublebuf_idx] + packbuf_disp),
msg_size, MPI_FLOAT, left, left, comm2d,
&mpi_rreq[rreq_idx]);
rreq_idx = (rreq_idx + 1)%rreq_max_inflight;
rreq_inflight++;
}
packbuf_disp += msg_size;
if (right != MPI_PROC_NULL) {
//printf("1 comm_rank: %d, right: %d\n", comm_rank, right);
MPI_Irecv((void *)(unpackbuf[doublebuf_idx] + packbuf_disp),
msg_size, MPI_FLOAT, right, right, comm2d,
&mpi_rreq[rreq_idx]);
rreq_idx = (rreq_idx + 1)%rreq_max_inflight;
rreq_inflight++;
}
packbuf_disp += msg_size;
/*x dim*/
if (bottom != MPI_PROC_NULL) {
//printf("1 comm_rank: %d, bottom: %d\n", comm_rank, bottom);
MPI_Irecv((void *)(unpackbuf[doublebuf_idx] + packbuf_disp),
msg_size, MPI_FLOAT, bottom, bottom, comm2d,
&mpi_rreq[rreq_idx]);
rreq_idx = (rreq_idx + 1)%rreq_max_inflight;
rreq_inflight++;
}
packbuf_disp += msg_size;
if (top != MPI_PROC_NULL) {
//printf("1 comm_rank: %d, top: %d\n", comm_rank, top);
MPI_Irecv((void *)(unpackbuf[doublebuf_idx] + packbuf_disp),
msg_size, MPI_FLOAT, top, top, comm2d,
&mpi_rreq[rreq_idx]);
rreq_idx = (rreq_idx + 1)%rreq_max_inflight;
rreq_inflight++;
}
}
}
/*if its the last iteration, synchronize on all batches*/
if (use_async) {
if (i == (iter_warmup - 1)) {
if (complete_sync_inflight > 0) {
if (tracking_events) {
complete_sync_wait = (complete_sync_wait + complete_sync_inflight - 1)%(batches_inflight*steps_per_batch);
CUDA_CHECK(cudaEventSynchronize(sendrecv_sync_event[complete_sync_wait]));
if (!use_single_stream)
CUDA_CHECK(cudaEventSynchronize(interior_sync_event[complete_sync_wait]));
}
complete_sync_inflight = 0;
}
while (rreq_inflight > 0) {
mp_wait(&rreq[complete_rreq_idx]);
complete_rreq_idx = (complete_rreq_idx + 1)%rreq_max_inflight;
rreq_inflight--;
}
while (sreq_inflight > 0) {
mp_wait(&sreq[complete_sreq_idx]);
complete_sreq_idx = (complete_sreq_idx + 1)%sreq_max_inflight;
sreq_inflight--;
}
}
}
/*interchange the compute and communication buffers*/
temp = exchange_buf;
exchange_buf = compute_buf;
compute_buf = temp;
}
CUDA_CHECK(cudaDeviceSynchronize());
if (wait_for_key && !comm_rank) {
int c;
puts("press any key");
c = getchar();
}
#ifdef _REPEAT_TIMED_LOOP_
int rep;
for (rep = 0; rep < reps_count; rep++) {
#endif
rreq_idx = 0;
sreq_idx = 0;
complete_sreq_idx = 0;
complete_rreq_idx = 0;
rreq_inflight = 0;
sreq_inflight = 0;
complete_sync_inflight = 0;
complete_sync_idx = 0;
complete_sync_wait = 0;
/*timed iterations*/
clock_gettime(CLOCK_REALTIME, &start);
#ifndef _FREE_NETWORK_
prepost_depth = (prepost_depth_global < iter_count) ? prepost_depth_global : iter_count;
for (i=0; i<prepost_depth; i++) {
doublebuf_idx = i%buffering;
packbuf_disp = 0;
if(use_mpi == 0)
{
/*y dim*/
if (left != MPI_PROC_NULL) {
mp_irecv((void *)(unpackbuf[doublebuf_idx] + packbuf_disp),
msg_size_bytes, left, ®_unpack[doublebuf_idx],
&rreq[rreq_idx]);
rreq_idx = (rreq_idx + 1)%rreq_max_inflight;
rreq_inflight++;
}
packbuf_disp += msg_size;
if (right != MPI_PROC_NULL) {
mp_irecv((void *)(unpackbuf[doublebuf_idx] + packbuf_disp),
msg_size_bytes, right, ®_unpack[doublebuf_idx],
&rreq[rreq_idx]);
rreq_idx = (rreq_idx + 1)%rreq_max_inflight;
rreq_inflight++;
}
packbuf_disp += msg_size;
/*x dim*/
if (bottom != MPI_PROC_NULL) {
mp_irecv((void *)(unpackbuf[doublebuf_idx] + packbuf_disp),
msg_size_bytes, bottom, ®_unpack[doublebuf_idx],
&rreq[rreq_idx]);
rreq_idx = (rreq_idx + 1)%rreq_max_inflight;
rreq_inflight++;
}
packbuf_disp += msg_size;
if (top != MPI_PROC_NULL) {
mp_irecv((void *)(unpackbuf[doublebuf_idx] + packbuf_disp),
msg_size_bytes, top, ®_unpack[doublebuf_idx],
&rreq[rreq_idx]);
rreq_idx = (rreq_idx + 1)%rreq_max_inflight;
rreq_inflight++;
}
}
else
{
if (left != MPI_PROC_NULL) {
//printf("2 comm_rank: %d, left: %d\n", comm_rank, left);
MPI_Irecv((void *)(unpackbuf[doublebuf_idx] + packbuf_disp),
msg_size, MPI_FLOAT, left, left, comm2d,
&mpi_rreq[rreq_idx]);
rreq_idx = (rreq_idx + 1)%rreq_max_inflight;
rreq_inflight++;
}
packbuf_disp += msg_size;
if (right != MPI_PROC_NULL) {
//printf("2 comm_rank: %d, right: %d\n", comm_rank, right);
MPI_Irecv((void *)(unpackbuf[doublebuf_idx] + packbuf_disp),
msg_size, MPI_FLOAT, right, right, comm2d,
&mpi_rreq[rreq_idx]);
rreq_idx = (rreq_idx + 1)%rreq_max_inflight;
rreq_inflight++;
}
packbuf_disp += msg_size;
/*x dim*/
if (bottom != MPI_PROC_NULL) {
//printf("2 comm_rank: %d, bottom: %d\n", comm_rank, bottom);
MPI_Irecv((void *)(unpackbuf[doublebuf_idx] + packbuf_disp),
msg_size, MPI_FLOAT, bottom, bottom, comm2d,
&mpi_rreq[rreq_idx]);
rreq_idx = (rreq_idx + 1)%rreq_max_inflight;
rreq_inflight++;
}
packbuf_disp += msg_size;
if (top != MPI_PROC_NULL) {
//printf("2 comm_rank: %d, top: %d\n", comm_rank, top);
MPI_Irecv((void *)(unpackbuf[doublebuf_idx] + packbuf_disp),
msg_size, MPI_FLOAT, top, top, comm2d,
&mpi_rreq[rreq_idx]);
rreq_idx = (rreq_idx + 1)%rreq_max_inflight;
rreq_inflight++;
}
}
}
#endif
//time_stop = cycles_to_ns(get_cycles());
clock_gettime(CLOCK_REALTIME, &stop);
time_prepost = stop.tv_nsec - start.tv_nsec; //(time_stop - time_start);
#if defined (_ENABLE_DRPROF_)
char *tags;
if (use_async) {
tags = "pack|interior|prepsend|postsend|postwait|unpack|boundary|postsync|waitsync|postrecv|";
} else {
tags = "pack|interior|packsync|postsend|wait|unpack|boundary|gpusync|postrecv";
}
if (prof_init(&prof, 1000, 1000, "1us", 50, 1, tags)) {
fprintf(stderr, "error in prof_init init.\n");
exit(-1);
}
prof_start = 1;
#endif
MPI_Barrier(MPI_COMM_WORLD);
CUDA_CHECK(cudaEventRecord(start_event, 0));
for (i = 0; i < iter_count; i++) {
doublebuf_idx = i%buffering;
#if defined (_ENABLE_DRPROF_)
PROF(&prof, prof_idx++);
#endif
#ifndef _FREE_PACK_
/*pack data*/
boundary_pack (packbuf[doublebuf_idx], exchange_buf, size, threadsperblock, boundary_sendrecv_stream);
#endif
#if defined (_ENABLE_DRPROF_)
PROF(&prof, prof_idx++);
#endif
#ifndef _FREE_INTERIOR_COMPUTE_
/*launch interior compute*/
if (!use_single_stream)
interior_compute (compute_buf, exchange_buf, size, boundary, threadsperblock, gridsize, interior_stream);
#endif
#if defined (_ENABLE_DRPROF_)
PROF(&prof, prof_idx++);
#endif
/*post all sends*/
packbuf_disp = 0;
#ifndef _FREE_NETWORK_
if (use_async) {
/*prepare and post requires requests to be contiguous, check if there is a wrap around*/
int sreq_idx_start = sreq_idx;
if ((sreq_idx_start + req_per_step) > sreq_max_inflight) {
fprintf(stderr, "sreq status array looping around in middle of a step: sreq_idx_start: %d sreq_max_inflight: %d \n",
sreq_idx_start, sreq_max_inflight);
exit(-1);
}
/*prepare all sends*/
/*y dim*/
if (right != MPI_PROC_NULL) {
mp_send_prepare((void *)(packbuf[doublebuf_idx] + packbuf_disp),
msg_size_bytes, right, ®_pack[doublebuf_idx],
&sreq[sreq_idx]);
sreq_idx = (sreq_idx + 1)%sreq_max_inflight;
sreq_inflight++;
}
packbuf_disp += msg_size;
if (left != MPI_PROC_NULL) {
mp_send_prepare((void *)(packbuf[doublebuf_idx] + packbuf_disp),
msg_size_bytes, left, ®_pack[doublebuf_idx],
&sreq[sreq_idx]);
sreq_idx = (sreq_idx + 1)%sreq_max_inflight;
sreq_inflight++;
}
packbuf_disp += msg_size;
/*x dim*/
if (top != MPI_PROC_NULL) {
mp_send_prepare((void *)(packbuf[doublebuf_idx] + packbuf_disp),
msg_size_bytes, top, ®_pack[doublebuf_idx],
&sreq[sreq_idx]);
sreq_idx = (sreq_idx + 1)%sreq_max_inflight;
sreq_inflight++;
}
packbuf_disp += msg_size;
if (bottom != MPI_PROC_NULL) {
mp_send_prepare((void *)(packbuf[doublebuf_idx] + packbuf_disp),
msg_size_bytes, bottom, ®_pack[doublebuf_idx],
&sreq[sreq_idx]);
sreq_idx = (sreq_idx + 1)%sreq_max_inflight;
sreq_inflight++;
}
#if defined (_ENABLE_DRPROF_)
PROF(&prof, prof_idx++);
#endif
/*post sends on stream*/
mp_isend_post_all_on_stream (req_per_step, &sreq[sreq_idx_start], boundary_sendrecv_stream);
#if defined (_ENABLE_DRPROF_)
PROF(&prof, prof_idx++);
#endif
/*launch interior compute*/
if (use_single_stream)
interior_compute (compute_buf, exchange_buf, size, boundary, threadsperblock, gridsize, boundary_sendrecv_stream);
/*post wait for recv on the stream*/
wait_idx = (i*req_per_step)%rreq_max_inflight;
mp_wait_all_on_stream(req_per_step, &rreq[wait_idx], boundary_sendrecv_stream);
} else {
CUDA_CHECK(cudaStreamSynchronize(boundary_sendrecv_stream));
/*launch interior compute*/
if (use_single_stream)
interior_compute (compute_buf, exchange_buf, size, boundary, threadsperblock, gridsize, boundary_sendrecv_stream);
if(use_mpi == 0)
{
/*post all sends*/
/*y dim*/
if (right != MPI_PROC_NULL) {
mp_isend((void *)(packbuf[doublebuf_idx] + packbuf_disp),
msg_size_bytes, right, ®_pack[doublebuf_idx],
&sreq[sreq_idx]);
sreq_idx = (sreq_idx + 1)%sreq_max_inflight;
sreq_inflight++;
}
packbuf_disp += msg_size;
if (left != MPI_PROC_NULL) {
mp_isend((void *)(packbuf[doublebuf_idx] + packbuf_disp),
msg_size_bytes, left, ®_pack[doublebuf_idx],
&sreq[sreq_idx]);
sreq_idx = (sreq_idx + 1)%sreq_max_inflight;
sreq_inflight++;
}
packbuf_disp += msg_size;
/*x dim*/
if (top != MPI_PROC_NULL) {
mp_isend((void *)(packbuf[doublebuf_idx] + packbuf_disp),
msg_size_bytes, top, ®_pack[doublebuf_idx],
&sreq[sreq_idx]);
sreq_idx = (sreq_idx + 1)%sreq_max_inflight;
sreq_inflight++;
}
packbuf_disp += msg_size;
if (bottom != MPI_PROC_NULL) {
mp_isend((void *)(packbuf[doublebuf_idx] + packbuf_disp),
msg_size_bytes, bottom, ®_pack[doublebuf_idx],
&sreq[sreq_idx]);
sreq_idx = (sreq_idx + 1)%sreq_max_inflight;
sreq_inflight++;
}