Index: tools/tools/netmap/pkt-gen.c
===================================================================
--- tools/tools/netmap/pkt-gen.c
+++ tools/tools/netmap/pkt-gen.c
@@ -169,7 +169,7 @@
 	int pkt_size;
 	int burst;
 	int forever;
-	int npackets;	/* total packets to send */
+	uint64_t npackets;	/* total packets to send */
 	int frags;	/* fragments per packet */
 	int nthreads;
 	int cpus;
@@ -810,10 +810,10 @@
 	struct targ *targ = (struct targ *) data;
 	struct pollfd pfd = { .fd = targ->fd, .events = POLLIN };
 	struct netmap_if *nifp = targ->nmd->nifp;
-	int i, rx = 0, n = targ->g->npackets;
+	int i, rx = 0;
 	void *frame;
 	int size;
-	uint32_t sent = 0;
+	uint64_t sent = 0, n = targ->g->npackets;
 	struct timespec ts, now, last_print;
 	uint32_t count = 0, min = 1000000000, av = 0;
 
@@ -828,7 +828,7 @@
 
 	clock_gettime(CLOCK_REALTIME_PRECISE, &last_print);
 	now = last_print;
-	while (n == 0 || (int)sent < n) {
+	while (n == 0 || sent < n) {
 		struct netmap_ring *ring = NETMAP_TXRING(nifp, 0);
 		struct netmap_slot *slot;
 		char *p;
@@ -878,7 +878,7 @@
 					ts.tv_nsec += 1000000000;
 					ts.tv_sec--;
 				}
-				if (1) D("seq %d/%d delta %d.%09d", seq, sent,
+				if (1) D("seq %d/%lu delta %d.%09d", seq, sent,
 					(int)ts.tv_sec, (int)ts.tv_nsec);
 				if (ts.tv_nsec < (int)min)
 					min = ts.tv_nsec;
@@ -919,13 +919,14 @@
 	struct pollfd pfd = { .fd = targ->fd, .events = POLLIN };
 	struct netmap_if *nifp = targ->nmd->nifp;
 	struct netmap_ring *txring, *rxring;
-	int i, rx = 0, sent = 0, n = targ->g->npackets;
+	int i, rx = 0;
+	uint64_t sent = 0, n = targ->g->npackets;
 
 	if (targ->g->nthreads > 1) {
 		D("can only reply ping with 1 thread");
 		return NULL;
 	}
-	D("understood ponger %d but don't know how to do it", n);
+	D("understood ponger %lu but don't know how to do it", n);
 	while (n == 0 || sent < n) {
 		uint32_t txcur, txavail;
 //#define BUSYWAIT
@@ -1066,8 +1067,9 @@
 	struct pollfd pfd = { .fd = targ->fd, .events = POLLOUT };
 	struct netmap_if *nifp;
 	struct netmap_ring *txring;
-	int i, n = targ->g->npackets / targ->g->nthreads;
-	int64_t sent = 0;
+	int i;
+	uint64_t n = targ->g->npackets / targ->g->nthreads;
+	uint64_t sent = 0;
 	int options = targ->g->options | OPT_COPY;
 	struct timespec nexttime = { 0, 0}; // XXX silence compiler
 	int rate_limit = targ->g->tx_rate;
@@ -1157,7 +1159,8 @@
 			options &= ~OPT_COPY;
 		}
 		for (i = targ->nmd->first_tx_ring; i <= targ->nmd->last_tx_ring; i++) {
-			int m, limit = rate_limit ?  tosend : targ->g->burst;
+			int m;
+			uint64_t limit = rate_limit ?  tosend : targ->g->burst;
 			if (n > 0 && n - sent < limit)
 				limit = n - sent;
 			txring = NETMAP_TXRING(nifp, i);
@@ -1693,7 +1696,7 @@
 			break;
 
 		case 'n':
-			g.npackets = atoi(optarg);
+			g.npackets = strtoull(optarg, NULL, 10);
 			break;
 
 		case 'F':