netdev - [PATCH bpf-next v2 02/16] selftests: xsk: remove the num_tx

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Date:   Tue, 17 Aug 2021 11:27:15 +0200
From:   Magnus Karlsson <magnus.karlsson@...il.com>
To:     magnus.karlsson@...el.com, bjorn@...nel.org, ast@...nel.org,
        daniel@...earbox.net, netdev@...r.kernel.org,
        maciej.fijalkowski@...el.com
Cc:     jonathan.lemon@...il.com, ciara.loftus@...el.com,
        bpf@...r.kernel.org, yhs@...com, andrii@...nel.org
Subject: [PATCH bpf-next v2 02/16] selftests: xsk: remove the num_tx_packets option

From: Magnus Karlsson <magnus.karlsson@...el.com>

Remove the number of tx packet option as this should be decided by the
test itself. Also change the number of packets to be sent to 4096
speeding up the execution.

Signed-off-by: Magnus Karlsson <magnus.karlsson@...el.com>
---
 tools/testing/selftests/bpf/xdpxceiver.c   | 33 +++++++---------------
 tools/testing/selftests/bpf/xdpxceiver.h   |  4 +--
 tools/testing/selftests/bpf/xsk_prereqs.sh |  3 +-
 3 files changed, 13 insertions(+), 27 deletions(-)

diff --git a/tools/testing/selftests/bpf/xdpxceiver.c b/tools/testing/selftests/bpf/xdpxceiver.c
index 1135fb980814..1b0efe566278 100644
--- a/tools/testing/selftests/bpf/xdpxceiver.c
+++ b/tools/testing/selftests/bpf/xdpxceiver.c
@@ -333,20 +333,19 @@ static struct option long_options[] = {
 	{"queue", optional_argument, 0, 'q'},
 	{"dump-pkts", optional_argument, 0, 'D'},
 	{"verbose", no_argument, 0, 'v'},
-	{"tx-pkt-count", optional_argument, 0, 'C'},
 	{0, 0, 0, 0}
 };
 
 static void usage(const char *prog)
 {
 	const char *str =
-	    "  Usage: %s [OPTIONS]\n"
-	    "  Options:\n"
-	    "  -i, --interface      Use interface\n"
-	    "  -q, --queue=n        Use queue n (default 0)\n"
-	    "  -D, --dump-pkts      Dump packets L2 - L5\n"
-	    "  -v, --verbose        Verbose output\n"
-	    "  -C, --tx-pkt-count=n Number of packets to send\n";
+		"  Usage: %s [OPTIONS]\n"
+		"  Options:\n"
+		"  -i, --interface      Use interface\n"
+		"  -q, --queue=n        Use queue n (default 0)\n"
+		"  -D, --dump-pkts      Dump packets L2 - L5\n"
+		"  -v, --verbose        Verbose output\n";
+
 	ksft_print_msg(str, prog);
 }
 
@@ -392,7 +391,7 @@ static void parse_command_line(int argc, char **argv)
 	opterr = 0;
 
 	for (;;) {
-		c = getopt_long(argc, argv, "i:DC:v", long_options, &option_index);
+		c = getopt_long(argc, argv, "i:Dv", long_options, &option_index);
 
 		if (c == -1)
 			break;
@@ -415,9 +414,6 @@ static void parse_command_line(int argc, char **argv)
 		case 'D':
 			debug_pkt_dump = 1;
 			break;
-		case 'C':
-			opt_pkt_count = atoi(optarg);
-			break;
 		case 'v':
 			opt_verbose = 1;
 			break;
@@ -427,11 +423,6 @@ static void parse_command_line(int argc, char **argv)
 		}
 	}
 
-	if (!opt_pkt_count) {
-		print_verbose("No tx-pkt-count specified, using default %u\n", DEFAULT_PKT_CNT);
-		opt_pkt_count = DEFAULT_PKT_CNT;
-	}
-
 	if (!validate_interfaces()) {
 		usage(basename(argv[0]));
 		ksft_exit_xfail();
@@ -554,9 +545,6 @@ static void tx_only(struct xsk_socket_info *xsk, u32 *frameptr, int batch_size)
 
 static int get_batch_size(int pkt_cnt)
 {
-	if (!opt_pkt_count)
-		return BATCH_SIZE;
-
 	if (pkt_cnt + BATCH_SIZE <= opt_pkt_count)
 		return BATCH_SIZE;
 
@@ -586,7 +574,7 @@ static void tx_only_all(struct ifobject *ifobject)
 	fds[0].fd = xsk_socket__fd(ifobject->xsk->xsk);
 	fds[0].events = POLLOUT;
 
-	while ((opt_pkt_count && pkt_cnt < opt_pkt_count) || !opt_pkt_count) {
+	while (pkt_cnt < opt_pkt_count) {
 		int batch_size = get_batch_size(pkt_cnt);
 
 		if (test_type == TEST_TYPE_POLL) {
@@ -602,8 +590,7 @@ static void tx_only_all(struct ifobject *ifobject)
 		pkt_cnt += batch_size;
 	}
 
-	if (opt_pkt_count)
-		complete_tx_only_all(ifobject);
+	complete_tx_only_all(ifobject);
 }
 
 static void worker_pkt_dump(void)
diff --git a/tools/testing/selftests/bpf/xdpxceiver.h b/tools/testing/selftests/bpf/xdpxceiver.h
index 6c428b276ab6..4ce5a18b32e7 100644
--- a/tools/testing/selftests/bpf/xdpxceiver.h
+++ b/tools/testing/selftests/bpf/xdpxceiver.h
@@ -39,7 +39,7 @@
 #define SOCK_RECONF_CTR 10
 #define BATCH_SIZE 64
 #define POLL_TMOUT 1000
-#define DEFAULT_PKT_CNT 10000
+#define DEFAULT_PKT_CNT (4 * 1024)
 #define RX_FULL_RXQSIZE 32
 
 #define print_verbose(x...) do { if (opt_verbose) ksft_print_msg(x); } while (0)
@@ -79,7 +79,7 @@ static u32 num_frames;
 static bool second_step;
 static int test_type;
 
-static int opt_pkt_count;
+static u32 opt_pkt_count = DEFAULT_PKT_CNT;
 static u8 opt_verbose;
 
 static u32 xdp_flags = XDP_FLAGS_UPDATE_IF_NOEXIST;
diff --git a/tools/testing/selftests/bpf/xsk_prereqs.sh b/tools/testing/selftests/bpf/xsk_prereqs.sh
index 8fe022a4dbfa..bf29d2549bee 100755
--- a/tools/testing/selftests/bpf/xsk_prereqs.sh
+++ b/tools/testing/selftests/bpf/xsk_prereqs.sh
@@ -10,7 +10,6 @@ ksft_skip=4
 
 SPECFILE=veth.spec
 XSKOBJ=xdpxceiver
-NUMPKTS=10000
 
 validate_root_exec()
 {
@@ -92,5 +91,5 @@ validate_ip_utility()
 
 execxdpxceiver()
 {
-	./${XSKOBJ} -i ${VETH0} -i ${VETH1},${NS1} -C ${NUMPKTS} ${VERBOSE_ARG} ${DUMP_PKTS_ARG}
+	./${XSKOBJ} -i ${VETH0} -i ${VETH1},${NS1} ${VERBOSE_ARG} ${DUMP_PKTS_ARG}
 }
-- 
2.29.0