int
main(int argc, char **argv)
{
int i, nloop, contpipe[2], datapipe[2];
pid_t childpid;
if (argc != 4)
err_quit("usage: bw_pipe <#loops> <#mbytes> <#bytes/write>");
nloop = atoi(argv[1]);
totalnbytes = atoi(argv[2]) * 1024 * 1024;
xfersize = atoi(argv[3]);
buf = Valloc(xfersize);
Touch(buf, xfersize);
Pipe(contpipe);
Pipe(datapipe);
if ( (childpid = Fork()) == 0) {
writer(contpipe[0], datapipe[1]); /* child */
exit(0);
}
/* 4parent */
Start_time();
for (i = 0; i < nloop; i++)
reader(contpipe[1], datapipe[0], totalnbytes);
printf("bandwidth: %.3f MB/sec\n",
totalnbytes / Stop_time() * nloop);
kill(childpid, SIGTERM);
exit(0);
}
int
main(int argc, char **argv)
{
int i, nloop, contpipe[2], msqid;
pid_t childpid;
if (argc != 4)
err_quit("usage: bw_svmsg <#loops> <#mbytes> <#bytes/write>");
nloop = atoi(argv[1]);
totalnbytes = atoi(argv[2]) * 1024 * 1024;
xfersize = atoi(argv[3]);
buf = Valloc(xfersize);
Touch(buf, xfersize);
buf->mtype = 1;
Pipe(contpipe);
msqid = Msgget(IPC_PRIVATE, IPC_CREAT | SVMSG_MODE);
if ( (childpid = Fork()) == 0) {
writer(contpipe[0], msqid); /* child */
exit(0);
}
Start_time();
for (i = 0; i < nloop; i++)
reader(contpipe[1], msqid, totalnbytes);
printf("bandwidth: %.3f MB/sec\n",
totalnbytes / Stop_time() * nloop);
kill(childpid, SIGTERM);
Msgctl(msqid, IPC_RMID, NULL);
exit(0);
}
int init_super(const char *dev_name)
{
int fd;
if ((vbfs_superblock_disk = Valloc(VBFS_SUPER_SIZE)) == NULL)
goto err;
memset(vbfs_superblock_disk, 0, VBFS_SUPER_SIZE);
fd = open(dev_name, O_RDWR | O_DIRECT | O_LARGEFILE);
if (fd < 0) {
fprintf(stderr, "open %s error, %s\n", dev_name, strerror(errno));
goto err;
}
init_vbfs_ctx(fd);
if (read_from_disk(fd, vbfs_superblock_disk, VBFS_SUPER_OFFSET, VBFS_SUPER_SIZE))
goto err;
if (load_super())
goto err;
vbfs_ctx.super.s_mount_time = time(NULL);
vbfs_ctx.super.s_state = MOUNT_DIRTY;
vbfs_ctx.super.super_vbfs_dirty = SUPER_DIRTY;
vbfs_ctx.super.inode_offset = vbfs_ctx.super.extend_bitmap_offset
+ vbfs_ctx.super.extend_bitmap_count;
vbfs_ctx.super.inode_extends = ((__u64)vbfs_ctx.super.s_inode_count * INODE_SIZE)
/ vbfs_ctx.super.s_extend_size;
/* bad extend init */
if (init_bad_extend())
goto err;
/* calculate free extend */
/* */
return 0;
err:
return -1;
}
void *mp_valloc(unsigned int size)
{
return Valloc(size);
}