/*
* Function: output_results
* Purpose: Print information about the time & bandwidth for a given
* minmax & # of iterations.
* Return: Nothing
* Programmer: Quincey Koziol, 9. May 2002
* Modifications:
*/
static void
output_results(const struct options *opts, const char *name, minmax *table,
int table_size,off_t data_size)
{
minmax total_mm;
accumulate_minmax_stuff(table, table_size, &total_mm);
print_indent(3);
output_report("%s (%d iteration(s)):\n", name,table_size);
/* Note: The maximum throughput uses the minimum amount of time & vice versa */
print_indent(4);
output_report("Maximum Throughput: %6.2f MB/s", MB_PER_SEC(data_size,total_mm.min));
if(opts->print_times)
output_report(" (%7.3f s)\n", total_mm.min);
else
output_report("\n");
print_indent(4);
output_report("Average Throughput: %6.2f MB/s",
MB_PER_SEC(data_size,total_mm.sum / total_mm.num));
if(opts->print_times)
output_report(" (%7.3f s)\n", (total_mm.sum / total_mm.num));
else
output_report("\n");
print_indent(4);
output_report("Minimum Throughput: %6.2f MB/s", MB_PER_SEC(data_size,total_mm.max));
if(opts->print_times)
output_report(" (%7.3f s)\n", total_mm.max);
else
output_report("\n");
}
static void
do_write_test(unsigned long file_size, unsigned long min_buf_size,
unsigned long max_buf_size)
{
uLongf src_len, total_len;
struct timeval timer_start, timer_stop;
double total_time;
Bytef *src;
for (src_len = min_buf_size; src_len <= max_buf_size; src_len <<= 1) {
register unsigned long i, iters;
iters = file_size / src_len;
src = (Bytef *)HDcalloc(1, sizeof(Bytef) * src_len);
if (!src) {
cleanup();
error("out of memory");
}
compression_time = 0.0;
if (random_test)
fill_with_random_data(src, src_len);
HDfprintf(stdout, "Buffer size == ");
if (src_len >= ONE_KB && (src_len % ONE_KB) == 0) {
if (src_len >= ONE_MB && (src_len % ONE_MB) == 0) {
HDfprintf(stdout, "%ldMB", src_len / ONE_MB);
} else {
HDfprintf(stdout, "%ldKB", src_len / ONE_KB);
}
} else {
HDfprintf(stdout, "%ld", src_len);
}
HDfprintf(stdout, "\n");
/* do uncompressed data write */
HDgettimeofday(&timer_start, NULL);
output = HDopen(filename, O_RDWR | O_CREAT, S_IRWXU);
if (output == -1)
error(HDstrerror(errno));
for (i = 0; i <= iters; ++i) {
Bytef *s_ptr = src;
uLong s_len = src_len;
/* loop to make sure we write everything out that we want to write */
for (;;) {
ssize_t rc = HDwrite(output, s_ptr, s_len);
if (rc == -1)
error(HDstrerror(errno));
if (rc == (ssize_t)s_len)
break;
s_len -= rc;
s_ptr += rc;
}
}
HDclose(output);
HDgettimeofday(&timer_stop, NULL);
total_time = ((double)timer_stop.tv_sec +
((double)timer_stop.tv_usec) / MICROSECOND) -
((double)timer_start.tv_sec +
((double)timer_start.tv_usec) / MICROSECOND);
HDfprintf(stdout, "\tUncompressed Write Time: %.2fs\n", total_time);
HDfprintf(stdout, "\tUncompressed Write Throughput: %.2fMB/s\n",
MB_PER_SEC(file_size, total_time));
HDunlink(filename);
/* do compressed data write */
output = HDopen(filename, O_RDWR | O_CREAT, S_IRWXU);
if (output == -1)
error(HDstrerror(errno));
report_once_flag = 1;
HDgettimeofday(&timer_start, NULL);
for (total_len = 0; total_len < file_size; total_len += src_len)
write_file(src, src_len);
HDclose(output);
HDgettimeofday(&timer_stop, NULL);
total_time = ((double)timer_stop.tv_sec +
((double)timer_stop.tv_usec) / MICROSECOND) -
((double)timer_start.tv_sec +
((double)timer_start.tv_usec) / MICROSECOND);
HDfprintf(stdout, "\tCompressed Write Time: %.2fs\n", total_time);
HDfprintf(stdout, "\tCompressed Write Throughput: %.2fMB/s\n",
MB_PER_SEC(file_size, total_time));
HDfprintf(stdout, "\tCompression Time: %gs\n", compression_time);
HDunlink(filename);
HDfree(src);
}
}