From 2dc6ac66432eb5c865ad472e2e9817c6872465cb Mon Sep 17 00:00:00 2001
From: Harald Welte <laforge@gnumonks.org>
Date: Sat, 3 Dec 2011 00:48:51 +0100
Subject: add host utility for usb benchmarking

---
 usb-benchmark-project/host/Makefile    |   3 +
 usb-benchmark-project/host/benchmark.c | 107 +++++++++++++++++++++++++++++++++
 2 files changed, 110 insertions(+)
 create mode 100644 usb-benchmark-project/host/Makefile
 create mode 100644 usb-benchmark-project/host/benchmark.c

(limited to 'usb-benchmark-project')

diff --git a/usb-benchmark-project/host/Makefile b/usb-benchmark-project/host/Makefile
new file mode 100644
index 0000000..76f9bfd
--- /dev/null
+++ b/usb-benchmark-project/host/Makefile
@@ -0,0 +1,3 @@
+
+benchmark: benchmark.o
+	$(CC) $(LDLAGS) -lusb-1.0 -o $@ $^
diff --git a/usb-benchmark-project/host/benchmark.c b/usb-benchmark-project/host/benchmark.c
new file mode 100644
index 0000000..6a1060a
--- /dev/null
+++ b/usb-benchmark-project/host/benchmark.c
@@ -0,0 +1,107 @@
+
+#include <unistd.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include <stdio.h>
+#include <errno.h>
+#include <signal.h>
+
+#include <libusb-1.0/libusb.h>
+
+#define EP_DATA_IN	0x82
+
+static struct libusb_device_handle *devh = NULL;
+
+static unsigned int num_bytes = 0, num_xfer = 0;
+static struct timeval tv_start;
+
+static void cb_xfr(struct libusb_transfer *xfr)
+{
+	if (xfr->status != LIBUSB_TRANSFER_COMPLETED) {
+		fprintf(stderr, "transfer status %d\n", xfr->status);
+		libusb_free_transfer(xfr);
+		exit(3);
+	}
+
+	//printf("length:%u, actual_length:%u\n", xfr->length, xfr->actual_length);
+	num_bytes += xfr->length;
+	num_xfer++;
+
+	if (libusb_submit_transfer(xfr) < 0) {
+		fprintf(stderr, "error re-submitting URB\n");
+		exit(1);
+	}
+
+}
+
+static int benchmark_in(void)
+{
+	static uint8_t buf[2048];
+	static struct libusb_transfer *xfr;
+
+	xfr = libusb_alloc_transfer(0);
+	if (!xfr)
+		return -ENOMEM;
+
+	libusb_fill_bulk_transfer(xfr, devh, EP_DATA_IN, buf,
+				sizeof(buf), cb_xfr, NULL, 0);
+
+	gettimeofday(&tv_start, NULL);
+	return libusb_submit_transfer(xfr);
+}
+
+static void measure(void)
+{
+	struct timeval tv_stop;
+	unsigned int diff_msec;
+
+	gettimeofday(&tv_stop, NULL);
+
+	diff_msec = (tv_stop.tv_sec - tv_start.tv_sec)*1000;
+	diff_msec += (tv_stop.tv_usec - tv_start.tv_usec)/1000;
+
+	printf("%u transfers (total %u bytes) in %u miliseconds => %u bytes/sec\n",
+		num_xfer, num_bytes, diff_msec, (num_bytes*1000)/diff_msec);
+}
+
+static void sig_hdlr(int signum)
+{
+	switch (signum) {
+	case SIGINT:
+		measure();
+		exit(0);
+		break;
+	}
+}
+
+int main(int argc, char **argv)
+{
+	int rc;
+
+	signal(SIGINT, &sig_hdlr);
+
+	rc = libusb_init(NULL);
+	if (rc < 0) {
+		fprintf(stderr, "Error initializing libusb\n");
+		exit(1);
+	}
+
+	devh = libusb_open_device_with_vid_pid(NULL, 0x16c0, 0x0763);
+	if (!devh) {
+		fprintf(stderr, "Error finding USB device\n");
+		exit(1);
+	}
+
+	rc = libusb_claim_interface(devh, 0);
+	if (rc < 0) {
+		fprintf(stderr, "Error claiming interface\n");
+		exit(1);
+	}
+
+	benchmark_in();
+
+	while (1) {
+		libusb_handle_events(NULL);
+	}
+
+}
-- 
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