[dpdk-dev] [PATCH v2] app/testpmd: make txonly mode generate multiple flows
Yongseok Koh
yskoh at mellanox.com
Wed Jan 17 19:18:46 CET 2018
Testpmd can generate multiple flows without taking much cost and this could
be a simple traffic generator for developer's quick tests. IP destination
address is varied.
Signed-off-by: Yongseok Koh <yskoh at mellanox.com>
---
v2:
* Add detailed explanation in a comment.
app/test-pmd/txonly.c | 15 ++++++++++++++-
1 file changed, 14 insertions(+), 1 deletion(-)
diff --git a/app/test-pmd/txonly.c b/app/test-pmd/txonly.c
index 1f08b6ed3..253cf2385 100644
--- a/app/test-pmd/txonly.c
+++ b/app/test-pmd/txonly.c
@@ -44,7 +44,7 @@
#define UDP_DST_PORT 1024
#define IP_SRC_ADDR ((192U << 24) | (168 << 16) | (0 << 8) | 1)
-#define IP_DST_ADDR ((192U << 24) | (168 << 16) | (0 << 8) | 2)
+#define IP_DST_ADDR ((192U << 24) | (168 << 16))
#define IP_DEFTTL 64 /* from RFC 1340. */
#define IP_VERSION 0x40
@@ -52,6 +52,7 @@
#define IP_VHL_DEF (IP_VERSION | IP_HDRLEN)
static struct ipv4_hdr pkt_ip_hdr; /**< IP header of transmitted packets. */
+static __thread uint8_t ip_var; /**< IP address variation */
static struct udp_hdr pkt_udp_hdr; /**< UDP header of transmitted packets. */
static void
@@ -159,6 +160,7 @@ pkt_burst_transmit(struct fwd_stream *fs)
struct rte_mbuf *pkt_seg;
struct rte_mempool *mbp;
struct ether_hdr eth_hdr;
+ struct ipv4_hdr *ip_hdr;
uint16_t nb_tx;
uint16_t nb_pkt;
uint16_t vlan_tci, vlan_tci_outer;
@@ -237,6 +239,17 @@ pkt_burst_transmit(struct fwd_stream *fs)
copy_buf_to_pkt(ð_hdr, sizeof(eth_hdr), pkt, 0);
copy_buf_to_pkt(&pkt_ip_hdr, sizeof(pkt_ip_hdr), pkt,
sizeof(struct ether_hdr));
+ ip_hdr = rte_pktmbuf_mtod_offset(pkt, struct ipv4_hdr *,
+ sizeof(struct ether_hdr));
+ /*
+ * Generate multiple flows by varying IP dest addr. This enables
+ * packets are well distributed by RSS in receiver side if any
+ * and txonly mode can be a decent packet generator for
+ * developer's quick performance regression test.
+ */
+ ip_hdr->dst_addr =
+ rte_cpu_to_be_32(IP_DST_ADDR | (ip_var++ << 8) |
+ (rte_lcore_id() + 1));
copy_buf_to_pkt(&pkt_udp_hdr, sizeof(pkt_udp_hdr), pkt,
sizeof(struct ether_hdr) +
sizeof(struct ipv4_hdr));
--
2.11.0
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