/*******************************************************************************
* This file is part of SWIFT.
* Copyright (c) 2016 Pedro Gonnet (pedro.gonnet@durham.ac.uk)
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published
* by the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this program. If not, see .
*
******************************************************************************/
/* Config parameters. */
#include
#ifdef HAVE_POSIX_FALLOCATE /* Are we on a sensible platform? */
#ifdef WITH_CSDS
/* Some standard headers. */
#include
#include
#include
#include
#include
#include
#include
#include
/* Local headers. */
#include "swift.h"
void logfile_mapper(void *map_data, int num_elements, void *extra_data) {
struct csds_logfile_writer *d = (struct csds_logfile_writer *)extra_data;
size_t offset;
char *out_string = (char *)csds_logfile_writer_get(d, 7, &offset);
char out_buff[8];
/* modulo due to bug in gcc, should be removed */
snprintf(out_buff, 8, "%06zi\n", (offset / 7) % 1000000);
memcpy(out_string, out_buff, 7);
}
int main(int argc, char *argv[]) {
/* Some constants. */
const int num_threads = 4;
const int num_runs = 20;
const int chunk_size = 1000;
/* Some constants. */
char filename[256];
const int now = time(NULL);
sprintf(filename, "/tmp/SWIFT_dump_test_%d.out", now);
/* Prepare a threadpool to write to the dump. */
struct threadpool t;
threadpool_init(&t, num_threads);
/* Prepare a dump. */
struct csds_logfile_writer d;
csds_logfile_writer_init(&d, filename, 1024);
/* Print the page size for reference. */
printf("Will dump %i bytes, page size is %zi bytes.\n",
num_runs * chunk_size * 7, sysconf(_SC_PAGE_SIZE));
/* Dump numbers in chunks. */
for (int run = 0; run < num_runs; run++) {
/* Ensure capacity. */
csds_logfile_writer_ensure(&d, 7 * chunk_size, 7 * chunk_size);
/* Dump a few numbers. */
printf("dumping %i chunks...\n", chunk_size);
fflush(stdout);
threadpool_map(&t, logfile_mapper, NULL, chunk_size, 0, 1, &d);
}
/* Sync the file, not necessary before dump_close, but just to test this. */
csds_logfile_writer_sync(&d);
/* Finalize the dump. */
csds_logfile_writer_close(&d);
/* Clean the threads */
threadpool_clean(&t);
/* Be clean */
remove(filename);
/* Return a happy number. */
return 0;
}
#else
#include
int main(int argc, char *argv[]) {
printf("No posix_fallocate, not testing anything.\n");
return 0;
}
#endif /* WITH_CSDS */
#endif /* HAVE_POSIX_FALLOCATE */