mirror of
git://projects.qi-hardware.com/ben-wpan.git
synced 2024-11-25 18:23:44 +02:00
133 lines
2.5 KiB
C
133 lines
2.5 KiB
C
/*
|
|
* usbperf/usbperf.c - Measure the rate of control transfers a device can do
|
|
*
|
|
* Written 2011 by Werner Almesberger
|
|
* Copyright 2011 Werner Almesberger
|
|
*
|
|
* 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; either version 2 of the License, or
|
|
* (at your option) any later version.
|
|
*/
|
|
|
|
|
|
#include <stdlib.h>
|
|
#include <stdio.h>
|
|
#include <unistd.h>
|
|
#include <dirent.h>
|
|
#include <sys/time.h>
|
|
|
|
#include <usb.h>
|
|
|
|
#include "usbopen.h"
|
|
|
|
|
|
#define SYSFS_USB_BASE "/sys/bus/usb/devices"
|
|
|
|
|
|
static void speed(usb_dev_handle *dev)
|
|
{
|
|
struct usb_device *device = usb_device(dev);
|
|
struct usb_bus *bus = device->bus;
|
|
DIR *dir;
|
|
const struct dirent *de;
|
|
char buf[1000]; /* @@@ plenty :) */
|
|
FILE *file;
|
|
int res, devnum;
|
|
float speed;
|
|
|
|
dir = opendir(SYSFS_USB_BASE);
|
|
if (!dir) {
|
|
perror(SYSFS_USB_BASE);
|
|
exit(1);
|
|
}
|
|
|
|
while ((de = readdir(dir))) {
|
|
if (atoi(de->d_name) != atoi(bus->dirname))
|
|
continue;
|
|
|
|
sprintf(buf, SYSFS_USB_BASE "/%s/devnum", de->d_name);
|
|
file = fopen(buf, "r");
|
|
if (!file)
|
|
continue;
|
|
res = fscanf(file, "%d", &devnum);
|
|
fclose(file);
|
|
|
|
if (res != 1 || devnum != atoi(device->filename))
|
|
continue;
|
|
|
|
sprintf(buf, SYSFS_USB_BASE "/%s/speed", de->d_name);
|
|
file = fopen(buf, "r");
|
|
if (!file)
|
|
continue;
|
|
res = fscanf(file, "%f", &speed);
|
|
fclose(file);
|
|
|
|
printf("%g Mbps\n", speed);
|
|
}
|
|
closedir(dir);
|
|
}
|
|
|
|
|
|
static void rounds(usb_dev_handle *dev, int n)
|
|
{
|
|
struct timeval t0, t1, t2;
|
|
double s = 0, d;
|
|
char buf;
|
|
int i, res;
|
|
|
|
gettimeofday(&t0, NULL);
|
|
for (i = 0; i != n; i++) {
|
|
gettimeofday(&t1, NULL);
|
|
/* GET_CONFIGURATION */
|
|
res = usb_control_msg(dev, USB_ENDPOINT_IN | USB_RECIP_DEVICE,
|
|
USB_REQ_GET_CONFIGURATION, 0, 0, &buf, 1, 1000);
|
|
if (res < 0)
|
|
fprintf(stderr, "usb_control_msg returns %d\n", res);
|
|
gettimeofday(&t2, NULL);
|
|
s += (t2.tv_sec-t1.tv_sec)+(t2.tv_usec-t1.tv_usec)*1e-6;
|
|
|
|
}
|
|
d = (t2.tv_sec-t0.tv_sec)+(t2.tv_usec-t0.tv_usec)*1e-6;
|
|
printf("Overall: %.3f ms/req\n", d/n*1000.0);
|
|
printf("Each: %.3f ms/req\n", s/n*1000.0);
|
|
}
|
|
|
|
|
|
static void usage(const char *name)
|
|
{
|
|
fprintf(stderr,
|
|
"usage: %s [vendor]:[product] [rounds]\n"
|
|
, name);
|
|
exit(1);
|
|
}
|
|
|
|
|
|
int main(int argc, char **argv)
|
|
{
|
|
usb_dev_handle *dev;
|
|
int n = 1000;
|
|
|
|
switch (argc) {
|
|
case 2:
|
|
break;
|
|
case 3:
|
|
n = atoi(argv[2]);
|
|
if (n <= 0)
|
|
usage(*argv);
|
|
break;
|
|
default:
|
|
usage(*argv);
|
|
}
|
|
|
|
parse_usb_id(argv[1]);
|
|
dev = open_usb(0, 0);
|
|
if (!dev)
|
|
return 1;
|
|
|
|
speed(dev);
|
|
rounds(dev, n);
|
|
|
|
return 0;
|
|
}
|