/
simul.c
1288 lines (1142 loc) · 30.8 KB
/
simul.c
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/*
* Copyright (C) 2003, The Regents of the University of California.
* Produced at the Lawrence Livermore National Laboratory.
* Written by Christopher J. Morrone <morrone@llnl.gov>
* UCRL-CODE-2003-019
* All rights reserved.
*
* Please read the COPYING file.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License (as published by
* the Free Software Foundation) version 2, dated June 1991.
*
* 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
* terms and conditions of the GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include "mpi.h"
#include <stdio.h>
#include <stdlib.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/vfs.h>
#include <fcntl.h>
#include <string.h>
#include <unistd.h>
#include <dirent.h>
#include <errno.h>
#include <time.h>
#include <sys/time.h>
#define FILEMODE S_IRUSR|S_IWUSR|S_IRGRP|S_IWGRP|S_IROTH
#define DIRMODE S_IRUSR|S_IXUSR|S_IRGRP|S_IWGRP|S_IROTH|S_IXOTH
#define SHARED 1
#define MAX_FILENAME_LEN 512
int rank;
int size;
char *testdir = NULL;
char hostname[1024];
int verbose;
int throttle = 1;
struct timeval t1, t2;
static char version[] = "1.16";
#ifdef __GNUC__
/* "inline" is a keyword in GNU C */
#elif __STDC_VERSION__ >= 199901L
/* "inline" is a keyword in C99 and later versions */
#else
# define inline /* "inline" not available */
#endif
#ifndef AIX
#define FAIL(msg) do { \
fprintf(stdout, "%s: Process %d(%s): FAILED in %s, %s: %s\n",\
timestamp(), rank, hostname, __func__, \
msg, strerror(errno)); \
fflush(stdout);\
MPI_Abort(MPI_COMM_WORLD, 1); \
} while(0)
#else
#define FAIL(msg) do { \
fprintf(stdout, "%s: Process %d(%s): FAILED, %s: %s\n",\
timestamp(), rank, hostname, \
msg, strerror(errno)); \
fflush(stdout);\
MPI_Abort(MPI_COMM_WORLD, 1); \
} while(0)
#endif
char *timestamp() {
static char datestring[80];
time_t timestamp;
fflush(stdout);
timestamp = time(NULL);
strftime(datestring, 80, "%T", localtime(×tamp));
return datestring;
}
inline void begin(char *str) {
if (verbose > 0 && rank == 0) {
gettimeofday(&t1, NULL);
fprintf(stdout, "%s:\tBeginning %s\n", timestamp(), str);
fflush(stdout);
}
}
inline void end(char *str) {
double elapsed;
MPI_Barrier(MPI_COMM_WORLD);
if (verbose > 0 && rank == 0) {
gettimeofday(&t2, NULL);
elapsed = ((((t2.tv_sec - t1.tv_sec) * 1000000L)
+ t2.tv_usec) - t1.tv_usec)
/ (double)1000000;
if (elapsed >= 60) {
fprintf(stdout, "%s:\tFinished %-15s(%.2f min)\n",
timestamp(), str, elapsed / 60);
} else {
fprintf(stdout, "%s:\tFinished %-15s(%.3f sec)\n",
timestamp(), str, elapsed);
}
fflush(stdout);
}
}
void Seq_begin(MPI_Comm comm, int numprocs) {
int size;
int rank;
int buf;
MPI_Status status;
MPI_Comm_size(comm, &size);
MPI_Comm_rank(comm, &rank);
if (rank >= numprocs) {
MPI_Recv(&buf, 1, MPI_INT, rank-numprocs, 1333, comm, &status);
}
}
void Seq_end(MPI_Comm comm, int numprocs) {
int size;
int rank;
int buf;
MPI_Comm_size(comm, &size);
MPI_Comm_rank(comm, &rank);
if ((rank + numprocs) < size) {
MPI_Send(&buf, 1, MPI_INT, rank+numprocs, 1333, comm);
}
}
/* This function does not FAIL if the requested "name" does not exist. This
is just to clean up any files or directories left over from previous runs.*/
void remove_file_or_dir(char *name) {
struct stat statbuf;
char errmsg[MAX_FILENAME_LEN+20];
if (stat(name, &statbuf) != -1) {
if (S_ISREG(statbuf.st_mode)) {
printf("stale file found\n");
if (unlink(name) == -1) {
sprintf(errmsg, "unlink of %s", name);
FAIL(errmsg);
}
}
if (S_ISDIR(statbuf.st_mode)) {
printf("stale directory found\n");
if (rmdir(name) == -1) {
sprintf(errmsg, "rmmdir of %s", name);
FAIL(errmsg);
}
}
}
}
char *create_files(char *prefix, int filesize, int shared) {
static char filename[MAX_FILENAME_LEN];
char errmsg[MAX_FILENAME_LEN+20];
int fd, i;
short zero = 0;
/* Process 0 creates the test file(s) */
if (rank == 0) {
for (i = 0; i < (shared ? 1 : size); i++) {
sprintf(filename, "%s/%s.%d", testdir, prefix, i);
remove_file_or_dir(filename);
if ((fd = creat(filename, FILEMODE)) == -1) {
sprintf(errmsg, "creat of file %s", filename);
FAIL(errmsg);
}
if (filesize > 0) {
if (lseek(fd, filesize - 1, SEEK_SET) == -1) {
sprintf(errmsg, "lseek in file %s", filename);
FAIL(errmsg);
}
if (write(fd, &zero, 1) == -1) {
sprintf(errmsg, "write in file %s", filename);
FAIL(errmsg);
}
}
if (close(fd) == -1) {
sprintf(errmsg, "close of file %s", filename);
FAIL(errmsg);
}
}
}
if (shared)
sprintf(filename, "%s/%s.0", testdir, prefix);
else
sprintf(filename, "%s/%s.%d", testdir, prefix, rank);
return filename;
}
void remove_files(char *prefix, int shared) {
char filename[1024];
int i;
/* Process 0 removes the file(s) */
if (rank == 0) {
for (i = 0; i < (shared ? 1 : size); i++) {
sprintf(filename, "%s/%s.%d", testdir, prefix, i);
/*printf("Removing file %s\n", filename); fflush(stdout);*/
if (unlink(filename) == -1) {
FAIL("unlink failed");
}
}
}
}
char *create_dirs(char *prefix, int shared) {
static char dirname[1024];
int i;
/* Process 0 creates the test file(s) */
if (rank == 0) {
for (i = 0; i < (shared ? 1 : size); i++) {
sprintf(dirname, "%s/%s.%d", testdir, prefix, i);
remove_file_or_dir(dirname);
if (mkdir(dirname, DIRMODE) == -1) {
FAIL("init mkdir failed");
}
}
}
if (shared)
sprintf(dirname, "%s/%s.0", testdir, prefix);
else
sprintf(dirname, "%s/%s.%d", testdir, prefix, rank);
return dirname;
}
void remove_dirs(char *prefix, int shared) {
char dirname[1024];
int i;
/* Process 0 removes the file(s) */
if (rank == 0) {
for (i = 0; i < (shared ? 1 : size); i++) {
sprintf(dirname, "%s/%s.%d", testdir, prefix, i);
if (rmdir(dirname) == -1) {
FAIL("rmdir failed");
}
}
}
}
char *create_symlinks(char *prefix, int shared) {
static char filename[1024];
static char linkname[1024];
int i;
/* Process 0 creates the test file(s) */
if (rank == 0) {
for (i = 0; i < (shared ? 1 : size); i++) {
sprintf(filename, "%s/symlink_target", testdir);
sprintf(linkname, "%s/%s.%d", testdir, prefix, i);
remove_file_or_dir(linkname);
if (symlink(filename, linkname) == -1) {
FAIL("symlink failed");
}
}
}
if (shared)
sprintf(linkname, "%s/%s.0", testdir, prefix);
else
sprintf(linkname, "%s/%s.%d", testdir, prefix, rank);
return linkname;
}
void check_single_success(char *testname, int rc, int error_rc) {
int *rc_vec, i;
int fail = 0;
int pass = 0;
if (rank == 0) {
if ((rc_vec = (int *)malloc(sizeof(int)*size)) == NULL) {
FAIL("malloc failed");
}
}
MPI_Gather(&rc, 1, MPI_INT, rc_vec, 1, MPI_INT, 0, MPI_COMM_WORLD);
if (rank == 0) {
for (i = 0; i < size; i++) {
if (rc_vec[i] == error_rc)
fail++;
else
pass++;
}
if (!((pass == 1) && (fail == size-1))) {
fprintf(stdout, "%s: FAILED in %s: ", timestamp(), testname);
if (pass > 1)
fprintf(stdout, "too many operations succeeded (%d).\n", pass);
else
fprintf(stdout, "too many operations failed (%d).\n", fail);
fflush(stdout);
MPI_Abort(MPI_COMM_WORLD, 1);
}
free(rc_vec);
}
}
void simul_open(int shared) {
int fd;
char *filename;
begin("setup");
filename = create_files("simul_open", 0, shared);
end("setup");
/* All open the file simultaneously */
begin("test");
if ((fd = open(filename, O_RDWR)) == -1) {
FAIL("open failed");
}
end("test");
/* All close the file one at a time */
begin("cleanup");
Seq_begin(MPI_COMM_WORLD, throttle);
if (close(fd) == -1) {
FAIL("close failed");
}
Seq_end(MPI_COMM_WORLD, throttle);
MPI_Barrier(MPI_COMM_WORLD);
remove_files("simul_open", shared);
end("cleanup");
}
void simul_close(int shared) {
int fd;
char *filename;
begin("setup");
filename = create_files("simul_close", 0, shared);
MPI_Barrier(MPI_COMM_WORLD);
/* All open the file one at a time */
Seq_begin(MPI_COMM_WORLD, throttle);
if ((fd = open(filename, O_RDWR)) == -1) {
FAIL("open failed");
}
Seq_end(MPI_COMM_WORLD, throttle);
end("setup");
begin("test");
/* All close the file simultaneously */
if (close(fd) == -1) {
FAIL("close failed");
}
end("test");
begin("cleanup");
remove_files("simul_close", shared);
end("cleanup");
}
void simul_chdir(int shared) {
char cwd[1024];
char *dirname;
begin("setup");
if (getcwd(cwd, 1024) == NULL) {
FAIL("init getcwd failed");
}
dirname = create_dirs("simul_chdir", shared);
end("setup");
begin("test");
/* All chdir to dirname */
if (chdir(dirname) == -1) {
FAIL("chdir failed");
}
end("test");
begin("cleanup");
/* All chdir back to old cwd */
if (chdir(cwd) == -1) {
FAIL("chdir back failed");
}
MPI_Barrier(MPI_COMM_WORLD);
remove_dirs("simul_chdir", shared);
end("cleanup");
}
void simul_file_stat(int shared) {
char *filename;
struct stat buf;
begin("setup");
filename = create_files("simul_file_stat", 0, shared);
end("setup");
begin("test");
/* All stat the file */
if (stat(filename, &buf) == -1) {
FAIL("stat failed");
}
end("test");
begin("cleanup");
remove_files("simul_file_stat", shared);
end("cleanup");
}
void simul_dir_stat(int shared) {
char *dirname;
struct stat buf;
begin("setup");
dirname = create_dirs("simul_dir_stat", shared);
end("setup");
begin("test");
/* All stat the directory */
if (stat(dirname, &buf) == -1) {
FAIL("stat failed");
}
end("test");
begin("cleanup");
remove_dirs("simul_dir_stat", shared);
end("cleanup");
}
void simul_readdir(int shared) {
DIR *dir;
char *dirname;
struct dirent *dptr;
begin("setup");
dirname = create_dirs("simul_readdir", shared);
MPI_Barrier(MPI_COMM_WORLD);
/* All open the directory(ies) one at a time */
Seq_begin(MPI_COMM_WORLD, throttle);
if ((dir = opendir(dirname)) == NULL) {
FAIL("init opendir failed");
}
Seq_end(MPI_COMM_WORLD, throttle);
end("setup");
begin("test");
/* All readdir the directory stream(s) */
if ((dptr = readdir(dir)) == NULL) {
FAIL("readdir failed");
}
end("test");
begin("cleanup");
/* All close the directory(ies) one at a time */
Seq_begin(MPI_COMM_WORLD, throttle);
if (closedir(dir) == -1) {
FAIL("closedir failed");
}
Seq_end(MPI_COMM_WORLD, throttle);
MPI_Barrier(MPI_COMM_WORLD);
remove_dirs("simul_readdir", shared);
end("cleanup");
}
void simul_statfs(int shared) {
char *filename;
struct statfs buf;
begin("setup");
filename = create_files("simul_statfs", 0, shared);
end("setup");
begin("test");
/* All statfs the file(s) */
if (statfs(filename, &buf) == -1) {
FAIL("statfs failed");
}
end("test");
begin("cleanup");
remove_files("simul_statfs", shared);
end("cleanup");
}
void simul_lseek(int shared) {
int fd;
char *filename;
begin("setup");
filename = create_files("simul_lseek", 0, shared);
MPI_Barrier(MPI_COMM_WORLD);
/* All open the file(s) one at a time */
Seq_begin(MPI_COMM_WORLD, throttle);
if ((fd = open(filename, O_RDWR)) == -1) {
FAIL("init open failed");
}
Seq_end(MPI_COMM_WORLD, throttle);
end("setup");
begin("test");
/* All lseek simultaneously */
if (lseek(fd, 1024, SEEK_SET) == -1) {
FAIL("lseek failed");
MPI_Abort(MPI_COMM_WORLD, 1);
}
end("test");
begin("cleanup");
/* All close the file(s) one at a time */
Seq_begin(MPI_COMM_WORLD, throttle);
if (close(fd) == -1) {
FAIL("cleanup close failed");
}
Seq_end(MPI_COMM_WORLD, throttle);
MPI_Barrier(MPI_COMM_WORLD);
remove_files("simul_lseek", shared);
end("cleanup");
}
void simul_read(int shared) {
int fd;
ssize_t fin;
char buf[1024];
char *filename;
int i = 0;
int retry = 100;
begin("setup");
filename = create_files("simul_read", 1024, shared);
MPI_Barrier(MPI_COMM_WORLD);
/* All open the file one at a time */
Seq_begin(MPI_COMM_WORLD, throttle);
if ((fd = open(filename, O_RDWR)) == -1) {
FAIL("init open failed");
}
Seq_end(MPI_COMM_WORLD, throttle);
end("setup");
begin("test");
/* All read simultaneously */
for (i = 1024; (i > 0) && (retry > 0); i -= fin, retry--) {
if ((fin = read(fd, buf, (size_t)i)) == -1) {
FAIL("read failed");
}
}
if( (retry == 0) && (i > 0) )
FAIL("read exceeded retry count");
end("test");
begin("cleanup");
/* All close the file one at a time */
Seq_begin(MPI_COMM_WORLD, throttle);
if (close(fd) == -1) {
FAIL("cleanup close failed");
}
Seq_end(MPI_COMM_WORLD, throttle);
MPI_Barrier(MPI_COMM_WORLD);
remove_files("simul_read", shared);
end("cleanup");
}
void simul_write(int shared) {
int fd;
ssize_t fin;
char *filename;
int i = 0;
int retry = 100;
begin("setup");
filename = create_files("simul_write", size * sizeof(int), shared);
MPI_Barrier(MPI_COMM_WORLD);
/* All open the file and lseek one at a time */
Seq_begin(MPI_COMM_WORLD, throttle);
if ((fd = open(filename, O_RDWR)) == -1) {
FAIL("init open failed");
}
if (lseek(fd, rank*sizeof(int), SEEK_SET) == -1) {
FAIL("init lseek failed");
}
Seq_end(MPI_COMM_WORLD, throttle);
end("setup");
begin("test");
/* All write simultaneously */
for (i = sizeof(int); (i > 0) && (retry > 0); i -= fin, retry--) {
if ((fin = write(fd, &rank, (size_t)i)) == -1) {
FAIL("write failed");
}
}
if( (retry == 0) && (i > 0) )
FAIL("write exceeded retry count");
end("test");
begin("cleanup");
/* All close the file one at a time */
Seq_begin(MPI_COMM_WORLD, throttle);
if (close(fd) == -1) {
FAIL("cleanup close failed");
}
Seq_end(MPI_COMM_WORLD, throttle);
MPI_Barrier(MPI_COMM_WORLD);
remove_files("simul_write", shared);
end("cleanup");
}
void simul_mkdir(int shared) {
int rc, i;
char dirname[MAX_FILENAME_LEN];
begin("setup");
if (shared)
sprintf(dirname, "%s/simul_mkdir.0", testdir);
else
sprintf(dirname, "%s/simul_mkdir.%d", testdir, rank);
if (rank == 0) {
for (i = 0; i < (shared ? 1 : size); i++) {
char buf[MAX_FILENAME_LEN];
sprintf(buf, "%s/simul_mkdir.%d", testdir, i);
remove_file_or_dir(buf);
}
}
end("setup");
begin("test");
/* All mkdir dirname */
rc = mkdir(dirname, DIRMODE);
if (!shared) {
if (rc == -1) {
FAIL("mkdir failed");
}
MPI_Barrier(MPI_COMM_WORLD);
} else { /* Only one should succeed */
check_single_success("simul_mkdir", rc, -1);
}
end("test");
begin("cleanup");
remove_dirs("simul_mkdir", shared);
end("cleanup");
}
void simul_rmdir(int shared) {
int rc;
char *dirname;
begin("setup");
dirname = create_dirs("simul_rmdir", shared);
MPI_Barrier(MPI_COMM_WORLD);
end("setup");
begin("test");
/* All rmdir dirname */
rc = rmdir(dirname);
if (!shared) {
if (rc == -1) {
FAIL("rmdir failed");
}
MPI_Barrier(MPI_COMM_WORLD);
} else { /* Only one should succeed */
check_single_success("simul_rmdir", rc, -1);
}
end("test");
begin("cleanup");
end("cleanup");
}
void simul_creat(int shared) {
int fd, i;
char filename[1024];
begin("setup");
if (shared)
sprintf(filename, "%s/simul_creat.0", testdir);
else
sprintf(filename, "%s/simul_creat.%d", testdir, rank);
if (rank == 0) {
for (i = 0; i < (shared ? 1 : size); i++) {
char buf[MAX_FILENAME_LEN];
sprintf(buf, "%s/simul_creat.%d", testdir, i);
remove_file_or_dir(buf);
}
}
end("setup");
begin("test");
/* All create the files simultaneously */
fd = creat(filename, FILEMODE);
if (fd == -1) {
FAIL("creat failed");
}
end("test");
begin("cleanup");
/* All close the files one at a time */
Seq_begin(MPI_COMM_WORLD, throttle);
if (close(fd) == -1) {
FAIL("close failed");
}
Seq_end(MPI_COMM_WORLD, throttle);
MPI_Barrier(MPI_COMM_WORLD);
remove_files("simul_creat", shared);
end("cleanup");
}
void simul_unlink(int shared) {
int rc;
char *filename;
begin("setup");
filename = create_files("simul_unlink", 0, shared);
end("setup");
begin("test");
/* All unlink the files simultaneously */
rc = unlink(filename);
if (!shared) {
if (rc == -1) {
FAIL("unlink failed");
}
} else {
check_single_success("simul_unlink", rc, -1);
}
end("test");
begin("cleanup");
end("cleanup");
}
void simul_rename(int shared) {
int rc, i;
char *oldfilename;
char newfilename[1024];
char *testname = "simul_rename";
begin("setup");
oldfilename = create_files(testname, 0, shared);
sprintf(newfilename, "%s/%s_new.%d", testdir, testname, rank);
if (rank == 0) {
for (i = 0; i < (shared ? 1 : size); i++) {
char buf[MAX_FILENAME_LEN];
sprintf(buf, "%s/%s_new.%d", testdir, testname, i);
remove_file_or_dir(buf);
}
}
end("setup");
begin("test");
/* All rename the files simultaneously */
rc = rename(oldfilename, newfilename);
if (!shared) {
if (rc == -1) {
FAIL("stat failed");
}
} else {
check_single_success(testname, rc, -1);
}
end("test");
begin("cleanup");
if (rc == 0) {
if (unlink(newfilename) == -1)
FAIL("unlink failed");
}
end("cleanup");
}
void simul_truncate(int shared) {
char *filename;
begin("setup");
filename = create_files("simul_truncate", 2048, shared);
end("setup");
begin("test");
/* All truncate simultaneously */
if (truncate(filename, 1024) == -1) {
FAIL("truncate failed");
}
end("test");
begin("cleanup");
remove_files("simul_truncate", shared);
end("cleanup");
}
void simul_readlink(int shared) {
char *linkname;
char buf[1024];
begin("setup");
linkname = create_symlinks("simul_readlink", shared);
end("setup");
begin("test");
/* All read the symlink(s) simultaneously */
if (readlink(linkname, buf, 1024) == -1) {
FAIL("readlink failed");
}
end("test");
begin("cleanup");
remove_files("simul_readlink", shared);
end("cleanup");
}
void simul_symlink(int shared) {
int rc, i;
char linkname[MAX_FILENAME_LEN];
char filename[MAX_FILENAME_LEN];
begin("setup");
if (shared)
sprintf(linkname, "%s/simul_symlink.0", testdir);
else
sprintf(linkname, "%s/simul_symlink.%d", testdir, rank);
if (rank == 0) {
for (i = 0; i < (shared ? 1 : size); i++) {
char buf[MAX_FILENAME_LEN];
sprintf(buf, "%s/simul_symlink.%d", testdir, i);
remove_file_or_dir(buf);
}
}
sprintf(filename, "%s/simul_symlink_target", testdir);
end("setup");
begin("test");
/* All create the symlinks simultaneously */
rc = symlink(filename, linkname);
if (!shared) {
if (rc == -1) {
FAIL("symlink failed");
}
} else {
check_single_success("simul_symlink", rc, -1);
}
end("test");
begin("cleanup");
remove_files("simul_symlink", shared);
end("cleanup");
}
void simul_link_to_one(int shared) {
int rc, i;
char *filename;
char linkname[1024];
begin("setup");
if (shared)
sprintf(linkname, "%s/simul_link.0", testdir);
else
sprintf(linkname, "%s/simul_link.%d", testdir, rank);
if (rank == 0) {
for (i = 0; i < (shared ? 1 : size); i++) {
char buf[MAX_FILENAME_LEN];
sprintf(buf, "%s/simul_link.%d", testdir, i);
remove_file_or_dir(buf);
}
}
filename = create_files("simul_link_target", 0, SHARED);
end("setup");
begin("test");
/* All create the hard links simultaneously */
rc = link(filename, linkname);
if (!shared) {
if (rc == -1) {
FAIL("link failed");
}
} else {
check_single_success("simul_link_to_one", rc, -1);
}
end("test");
begin("cleanup");
remove_files("simul_link_target", SHARED);
remove_files("simul_link", shared);
end("cleanup");
}
void simul_link_to_many(int shared) {
char *filename;
char linkname[1024];
int i;
if (shared) {
if (verbose > 0 && rank == 0)
printf("%s:\tThis is just a place holder; no test is run here.\n",
timestamp());
return;
}
begin("setup");
filename = create_files("simul_link", 0, shared);
sprintf(linkname, "%s/simul_link_target.%d", testdir, rank);
if (rank == 0) {
for (i = 0; i < size; i++) {
char buf[MAX_FILENAME_LEN];
sprintf(buf, "%s/simul_link_target.%d", testdir, i);
remove_file_or_dir(buf);
}
}
end("setup");
begin("test");
/* All create the hard links simultaneously */
if (link(filename, linkname) == -1) {
FAIL("link failed");
}
end("test");
begin("cleanup");
remove_files("simul_link", shared);
remove_files("simul_link_target", !SHARED);
end("cleanup");
}
void simul_fcntl_lock(int shared) {
int rc, fd;
char *filename;
struct flock sf_lock = {
.l_type = F_WRLCK,
.l_whence = SEEK_SET,
.l_start = 0,
.l_len = 0
};
struct flock sf_unlock = {
.l_type = F_UNLCK,
.l_whence = SEEK_SET,
.l_start = 0,
.l_len = 0
};
begin("setup");
filename = create_files("simul_fcntl", 0, shared);
MPI_Barrier(MPI_COMM_WORLD);
/* All open the file one at a time */
Seq_begin(MPI_COMM_WORLD, throttle);
if ((fd = open(filename, O_RDWR)) == -1) {
FAIL("open failed");
}
Seq_end(MPI_COMM_WORLD, throttle);
end("setup");
begin("test");
/* All lock the file(s) simultaneously */
rc = fcntl(fd, F_SETLK, &sf_lock);
if (!shared) {
if (rc == -1) {
if (errno == ENOSYS) {
if (rank == 0) {
fprintf(stdout, "WARNING: fcntl locking not supported.\n");
fflush(stdout);
}
} else {
FAIL("fcntl lock failed");
}
}
MPI_Barrier(MPI_COMM_WORLD);
} else {
int saved_errno = errno;
int *rc_vec, *er_vec, i;
int fail = 0;
int pass = 0;
int nosys = 0;
if (rank == 0) {
if ((rc_vec = (int *)malloc(sizeof(int)*size)) == NULL)
FAIL("malloc failed");
if ((er_vec = (int *)malloc(sizeof(int)*size)) == NULL)
FAIL("malloc failed");
}
MPI_Gather(&rc, 1, MPI_INT, rc_vec, 1, MPI_INT, 0, MPI_COMM_WORLD);
MPI_Gather(&saved_errno, 1, MPI_INT, er_vec, 1, MPI_INT, 0,
MPI_COMM_WORLD);
if (rank == 0) {
for (i = 0; i < size; i++) {
if (rc_vec[i] == -1) {
if (er_vec[i] == ENOSYS) {
nosys++;
} else if (er_vec[i] != EACCES && er_vec[i] != EAGAIN) {
errno = er_vec[i];
FAIL("fcntl failed as expected, but with wrong errno");
}
fail++;
} else {
pass++;
}
}
if (nosys == size) {