/*
* stress_str()
* stress CPU by doing various string operations
*/
int stress_str(
uint64_t *const counter,
const uint32_t instance,
const uint64_t max_ops,
const char *name)
{
stress_str_func func = opt_str_stressor->func;
(void)instance;
do {
char str1[256], str2[128];
stress_strnrnd(str1, sizeof(str1));
stress_strnrnd(str2, sizeof(str2));
(void)func(name, str1, sizeof(str1), str2, sizeof(str2));
(*counter)++;
} while (opt_do_run && (!max_ops || *counter < max_ops));
return EXIT_SUCCESS;
}
/*
* stress_fiemap_writer()
* write data in random places and punch holes
* in data in random places to try and maximize
* extents in the file
*/
int stress_fiemap_writer(
const char *name,
const int fd,
uint64_t *counters,
const uint64_t max_ops)
{
uint8_t buf[1];
uint64_t len = (off_t)opt_fiemap_size - sizeof(buf);
uint64_t counter;
int rc = EXIT_FAILURE;
#if defined(FALLOC_FL_PUNCH_HOLE) && \
defined(FALLOC_FL_KEEP_SIZE)
bool punch_hole = true;
#endif
stress_strnrnd((char *)buf, sizeof(buf));
do {
uint64_t offset;
size_t i;
counter = 0;
offset = (mwc64() % len) & ~0x1fff;
if (lseek(fd, (off_t)offset, SEEK_SET) < 0)
break;
if (write(fd, buf, sizeof(buf)) < 0) {
if ((errno != EAGAIN) && (errno != EINTR)) {
pr_fail_err(name, "write");
goto tidy;
}
}
#if defined(FALLOC_FL_PUNCH_HOLE) && \
defined(FALLOC_FL_KEEP_SIZE)
if (!punch_hole)
continue;
offset = mwc64() % len;
if (fallocate(fd, FALLOC_FL_PUNCH_HOLE |
FALLOC_FL_KEEP_SIZE, offset, 8192) < 0) {
if (errno == EOPNOTSUPP)
punch_hole = false;
}
#endif
for (i = 0; i < MAX_FIEMAP_PROCS; i++)
counter += counters[i];
} while (opt_do_run && (!max_ops || counter < max_ops));
rc = EXIT_SUCCESS;
tidy:
(void)close(fd);
return rc;
}
