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cufile_sample_033.cc
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cufile_sample_033.cc
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/*
* Copyright 2020 NVIDIA Corporation. All rights reserved.
*
* Please refer to the NVIDIA end user license agreement (EULA) associated
* with this source code for terms and conditions that govern your use of
* this software. Any use, reproduction, disclosure, or distribution of
* this software and related documentation outside the terms of the EULA
* is strictly prohibited.
*
*/
/*
* This is a data-integrity test for cuFileReadAsync/WriteAsync APIs.
* This shows how the async apis can be used in a batch mode.
* The test does the following:
* 1. Creates a Test file with pattern
* 2. Test file is loaded to device memory (cuFileReadAsync)
* 3. From device memory, data is written to a new file (cuFileWriteAsync)
* 4. Test file and new file are compared for data integrity
*
* e9d2f73120b2f2b1d2782e8ef5a42a3259b3c2badc5edb6ee04d4bc7b7633a
* e9d2f73120b2f2b1d2782e8ef5a42a3259b3c2badc5edb6ee04d4bc7b7633a
* SHA SUM Match
* API Version :
* 440-442(us) : 1
* 510-512(us) : 1
*
*/
#include <cstdlib>
#include <cstring>
#include <fstream>
#include <random>
#include <chrono>
#include <iostream>
#include <stdexcept>
#include <unistd.h>
#include <fcntl.h>
#include <assert.h>
#include <openssl/sha.h>
#include <cuda_runtime.h>
// include this header
#include "cufile.h"
#include "cufile_sample_utils.h"
using namespace std;
// copy bytes
#define MAX_BUF_SIZE (1024 * 1024UL)
#define MAX_BATCH_SIZE 4
typedef struct io_args_s
{
void *devPtr;
size_t max_size;
off_t offset;
off_t buf_off;
ssize_t read_bytes_done;
ssize_t write_bytes_done;
} io_args_t;
int main(int argc, char *argv[]) {
int wfd = -1, rfd = -1;
void *hostPtr = nullptr;
ssize_t ret = -1;
io_args_t args[MAX_BATCH_SIZE];
CUfileError_t status;
CUfileDescr_t cf_descr;
CUfileHandle_t cf_rhandle;
CUfileHandle_t cf_whandle;
unsigned char iDigest[SHA256_DIGEST_LENGTH], oDigest[SHA256_DIGEST_LENGTH];
Prng prng(255);
const char *TEST_READWRITEFILE, *TEST_WRITEFILE;
size_t total_size = MAX_BUF_SIZE * MAX_BATCH_SIZE;
// io stream associated with the I/O
cudaStream_t io_stream[MAX_BATCH_SIZE];
if(argc < 4) {
std::cerr << argv[0] << " <readfilepath> <writefilepath> <gpuid> "<< std::endl;
exit(1);
}
TEST_READWRITEFILE = argv[1];
TEST_WRITEFILE = argv[2];
check_cudaruntimecall(cudaSetDevice(atoi(argv[3])));
// Create TEST_READWRITEFILE file using standard Posix File IO calls
wfd = open(TEST_READWRITEFILE, O_RDWR | O_CREAT, 0644);
if (wfd < 0) {
std::cerr << "test file open error : " << TEST_READWRITEFILE << " "
<< std::strerror(errno) << std::endl;
return -1;
}
memset(&args, 0, sizeof(args));
// Allocate all the arguments in the heap.
hostPtr = malloc(total_size);
if (!hostPtr) {
std::cerr << "buffer allocation failure : "
<< std::strerror(errno) << std::endl;
ret = -1;
goto out;
}
memset(hostPtr, prng.next_random_offset(), total_size);
ret = write(wfd, hostPtr, total_size);
if (ret < 0) {
std::cerr << "write failure : " << std::strerror(errno)
<< std::endl;
goto out;
}
close(wfd);
wfd = -1;
free(hostPtr);
hostPtr = nullptr;
//allocate Memory
for (unsigned i = 0; i < MAX_BATCH_SIZE; i++) {
args[i].max_size = MAX_BUF_SIZE;
// Allocate device Memory and register with cuFile
check_cudaruntimecall(cudaMalloc(&args[i].devPtr, args[i].max_size));
// Register buffers. For unregistered buffers, this call is not required.
status = cuFileBufRegister(args[i].devPtr, args[i].max_size, 0);
if (status.err != CU_FILE_SUCCESS) {
std::cerr << "buf register failed: "
<< cuFileGetErrorString(status) << std::endl;
ret = -1;
goto out;
}
if(i > 0)
args[i].offset += args[i -1].offset + args[i].max_size;
else
args[i].offset = 0;
/* Create a stream for each of the batch entries. One can create a single stream as well for all I/Os */
check_cudaruntimecall(cudaStreamCreateWithFlags(&io_stream[i], cudaStreamNonBlocking));
// special case for holes
check_cudaruntimecall(cudaMemsetAsync(args[i].devPtr, 0, args[i].max_size, io_stream[i]));
}
// Open TEST_READWRITEFILE in O_DIRECT and readonly mode
rfd = open(TEST_READWRITEFILE, O_RDONLY | O_DIRECT);
if (rfd < 0) {
std::cerr << "read file open error : " << TEST_READWRITEFILE << " "
<< std::strerror(errno) << std::endl;
ret = rfd;
goto out;
}
// Open TEST_WRITEFILE in O_DIRECT and readonly mode
wfd = open(TEST_WRITEFILE, O_CREAT | O_RDWR | O_DIRECT, 0664);
if (wfd < 0) {
std::cerr << "write file open error : " << std::strerror(errno)
<< std::endl;
ret = wfd;
goto out;
}
// Register the filehandles
memset((void *)&cf_descr, 0, sizeof(CUfileDescr_t));
cf_descr.handle.fd = rfd;
cf_descr.type = CU_FILE_HANDLE_TYPE_OPAQUE_FD;
status = cuFileHandleRegister(&cf_rhandle, &cf_descr);
if (status.err != CU_FILE_SUCCESS) {
std::cerr << "file register error: "
<< cuFileGetErrorString(status) << std::endl;
ret = -1;
goto out;
}
memset((void *)&cf_descr, 0, sizeof(CUfileDescr_t));
cf_descr.handle.fd = wfd;
cf_descr.type = CU_FILE_HANDLE_TYPE_OPAQUE_FD;
status = cuFileHandleRegister(&cf_whandle, &cf_descr);
if (status.err != CU_FILE_SUCCESS) {
std::cerr << "file register error: "
<< cuFileGetErrorString(status) << std::endl;
ret = -1;
goto out;
}
std::cout << "batch read to device memory using a batch size:" << MAX_BATCH_SIZE
<< " for file:" << TEST_READWRITEFILE
<< std::endl;
for (unsigned i = 0; i < MAX_BATCH_SIZE; i++) {
status = cuFileReadAsync(cf_rhandle, (unsigned char *)args[i].devPtr,
&args[i].max_size, &args[i].offset,
&args[i].buf_off, &args[i].read_bytes_done,
io_stream[i]);
if (status.err != CU_FILE_SUCCESS) {
std::cerr << "read failed : "
<< cuFileGetErrorString(status) << std::endl;
ret = -1;
goto out;
}
}
std::cout << "batch read submit done to file:" << TEST_WRITEFILE << std::endl;
// Write loaded data from GPU memory to a new file
std::cout << "batch write to device memory to file using a batch size:" << MAX_BATCH_SIZE
<< " for file:" << TEST_WRITEFILE << std::endl;
for (unsigned i = 0; i < MAX_BATCH_SIZE; i++) {
status = cuFileWriteAsync(cf_whandle, (unsigned char *)args[i].devPtr,
&args[i].max_size, &args[i].offset,
&args[i].buf_off, &args[i].write_bytes_done, io_stream[i]);
if (status.err != CU_FILE_SUCCESS) {
std::cerr << "write failed : "
<< cuFileGetErrorString(status) << std::endl;
ret = -1;
goto out;
}
}
std::cout << "batch write submit done to file :" << TEST_WRITEFILE << std::endl;
//synchronize streams and check for result
for (unsigned i = 0; i < MAX_BATCH_SIZE; i++) {
check_cudaruntimecall(cudaStreamSynchronize(io_stream[i]));
if((args[i].read_bytes_done < (ssize_t)args[i].max_size) ||
(args[i].write_bytes_done < args[i].read_bytes_done))
{
std::cerr << "io error issued size:" << args[i].max_size <<
" read:" << args[i].read_bytes_done <<
" write:" << args[i].write_bytes_done << std::endl;
ret = -1;
goto out;
}
}
// Compare file signatures
ret = SHASUM256(TEST_READWRITEFILE, iDigest, total_size);
if(ret < 0) {
std::cerr << "SHASUM compute error" << std::endl;
goto out;
}
DumpSHASUM(iDigest);
ret = SHASUM256(TEST_WRITEFILE, oDigest, total_size);
if(ret < 0) {
std::cerr << "SHASUM compute error" << std::endl;
goto out;
}
DumpSHASUM(oDigest);
if (memcmp(iDigest, oDigest, SHA256_DIGEST_LENGTH) != 0) {
std::cerr << "SHA SUM Mismatch" << std::endl;
ret = -1;
} else {
std::cout << "SHA SUM Match" << std::endl;
ret = 0;
}
out:
if(hostPtr)
free(hostPtr);
for (unsigned i = 0; i < MAX_BATCH_SIZE; i++) {
if(args[i].devPtr) {
cuFileBufDeregister(args[i].devPtr);
check_cudaruntimecall(cudaFree(args[i].devPtr));
}
if(io_stream[i])
check_cudaruntimecall(cudaStreamDestroy(io_stream[i]));
}
if(cf_rhandle)
cuFileHandleDeregister(cf_rhandle);
if(cf_whandle)
cuFileHandleDeregister(cf_whandle);
close(rfd);
close(wfd);
return ret;
}