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diff --git a/examples/quota_watermark/qw/args.c b/examples/quota_watermark/qw/args.c
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+/*-
+ * BSD LICENSE
+ *
+ * Copyright(c) 2010-2014 Intel Corporation. All rights reserved.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * * Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in
+ * the documentation and/or other materials provided with the
+ * distribution.
+ * * Neither the name of Intel Corporation nor the names of its
+ * contributors may be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+
+#include <rte_common.h>
+#include <rte_lcore.h>
+
+#include "args.h"
+
+
+unsigned int portmask = 0;
+
+
+static void
+usage(const char *prgname)
+{
+ fprintf(stderr, "Usage: %s [EAL args] -- -p <portmask>\n"
+ "-p PORTMASK: hexadecimal bitmask of NIC ports to configure\n",
+ prgname);
+}
+
+static unsigned long
+parse_portmask(const char *portmask_str)
+{
+ return strtoul(portmask_str, NULL, 16);
+}
+
+static void
+check_core_count(void)
+{
+ if (rte_lcore_count() < 3)
+ rte_exit(EXIT_FAILURE, "At least 3 cores need to be passed in the coremask\n");
+}
+
+static void
+check_portmask_value(unsigned int portmask)
+{
+ unsigned int port_nb = 0;
+
+ port_nb = __builtin_popcount(portmask);
+
+ if (port_nb == 0)
+ rte_exit(EXIT_FAILURE, "At least 2 ports need to be passed in the portmask\n");
+
+ if (port_nb % 2 != 0)
+ rte_exit(EXIT_FAILURE, "An even number of ports is required in the portmask\n");
+}
+
+int
+parse_qw_args(int argc, char **argv)
+{
+ int opt;
+
+ while ((opt = getopt(argc, argv, "h:p:")) != -1) {
+ switch (opt) {
+ case 'h':
+ usage(argv[0]);
+ break;
+ case 'p':
+ portmask = parse_portmask(optarg);
+ break;
+ default:
+ usage(argv[0]);
+ }
+ }
+
+ check_core_count();
+ check_portmask_value(portmask);
+
+ return 0;
+}