Hi Yongseok,
> -----Original Message-----
> From: dev [mailto:dev-boun...@dpdk.org] On Behalf Of Yongseok Koh
> Sent: Thursday, March 28, 2019 1:51 AM
> To: Lu, Wenzhuo <wenzhuo...@intel.com>; Wu, Jingjing
> <jingjing...@intel.com>
> Cc: dev@dpdk.org; jer...@marvell.com; Ananyev, Konstantin
> <konstantin.anan...@intel.com>
> Subject: [dpdk-dev] [PATCH v3] app/testpmd: make txonly mode generate
> multiple flows
>
> Testpmd can generate multiple flows without taking much cost and this could
> be a simple traffic generator for developer's quick tests. If "--txonly-multi-
> flow" is specified in the command line, IP source address is varied to gnerate
> multiple flows.
>
> Signed-off-by: Yongseok Koh <ys...@mellanox.com>
> ---
>
> v3:
> * Add "--txonly-multi-flow" param to enable the feature.
> * Replace __thread with RTE_PER_LCORE.
>
> v2:
> * Add detailed explanation in a comment.
>
> app/test-pmd/parameters.c | 4 ++++
> app/test-pmd/testpmd.c | 3 +++
> app/test-pmd/testpmd.h | 2 ++
> app/test-pmd/txonly.c | 22 ++++++++++++++++++++++
> doc/guides/testpmd_app_ug/run_app.rst | 4 ++++
> 5 files changed, 35 insertions(+)
>
> diff --git a/app/test-pmd/parameters.c b/app/test-pmd/parameters.c index
> 38b419767b..7b6b60905d 100644
> --- a/app/test-pmd/parameters.c
> +++ b/app/test-pmd/parameters.c
> @@ -173,6 +173,7 @@ usage(char* progname)
> " Used mainly with PCAP drivers.\n");
> printf(" --txpkts=X[,Y]*: set TX segment sizes"
> " or total packet length.\n");
> + printf(" --txonly-multi-flow: generate multiple flows in txonly
> +mode\n");
> printf(" --disable-link-check: disable check on link status when "
> "starting/stopping ports.\n");
> printf(" --no-lsc-interrupt: disable link status change interrupt.\n");
> @@ -632,6 +633,7 @@ launch_args_parse(int argc, char** argv)
> { "no-flush-rx", 0, 0, 0 },
> { "flow-isolate-all", 0, 0, 0 },
> { "txpkts", 1, 0, 0 },
> + { "txonly-multi-flow", 0, 0, 0 },
> { "disable-link-check", 0, 0, 0 },
> { "no-lsc-interrupt", 0, 0, 0 },
> { "no-rmv-interrupt", 0, 0, 0 },
> @@ -1141,6 +1143,8 @@ launch_args_parse(int argc, char** argv)
> else
> rte_exit(EXIT_FAILURE, "bad
> txpkts\n");
> }
> + if (!strcmp(lgopts[opt_idx].name, "txonly-multi-
> flow"))
> + txonly_multi_flow = 1;
> if (!strcmp(lgopts[opt_idx].name, "no-flush-rx"))
> no_flush_rx = 1;
> if (!strcmp(lgopts[opt_idx].name, "disable-link-
> check")) diff --git a/app/test-pmd/testpmd.c b/app/test-pmd/testpmd.c
> index 216be47f92..b950e8cc55 100644
> --- a/app/test-pmd/testpmd.c
> +++ b/app/test-pmd/testpmd.c
> @@ -217,6 +217,9 @@ uint8_t tx_pkt_nb_segs = 1; /**< Number of
> segments in TXONLY packets */ enum tx_pkt_split tx_pkt_split =
> TX_PKT_SPLIT_OFF; /**< Split policy for packets to TX. */
>
> +int txonly_multi_flow;
This should be "uint8_t txonly_multi_flow;" similar to other variables in use,
for example "uint8_t no_flush_rx = 0;"
> +/**< Whether multiple flows are generated in TXONLY mode. */
> +
> uint16_t nb_pkt_per_burst = DEF_PKT_BURST; /**< Number of packets per
> burst. */ uint16_t mb_mempool_cache = DEF_MBUF_CACHE; /**< Size of
> mbuf mempool cache. */
>
> diff --git a/app/test-pmd/testpmd.h b/app/test-pmd/testpmd.h index
> 85b791b6bb..668227bc55 100644
> --- a/app/test-pmd/testpmd.h
> +++ b/app/test-pmd/testpmd.h
> @@ -439,6 +439,8 @@ enum tx_pkt_split {
>
> extern enum tx_pkt_split tx_pkt_split;
>
> +extern int txonly_multi_flow;
This should be "extern uint8_t txonly_multi_flow;" in line with the similar
variables in use,
For example "extern uint8_t no_flush_rx;"
> +
> extern uint16_t nb_pkt_per_burst;
> extern uint16_t mb_mempool_cache;
> extern int8_t rx_pthresh;
> diff --git a/app/test-pmd/txonly.c b/app/test-pmd/txonly.c index
> 1f08b6ed37..def52a0487 100644
> --- a/app/test-pmd/txonly.c
> +++ b/app/test-pmd/txonly.c
> @@ -52,6 +52,7 @@
> #define IP_VHL_DEF (IP_VERSION | IP_HDRLEN)
>
> static struct ipv4_hdr pkt_ip_hdr; /**< IP header of transmitted packets.
> */
> +RTE_DEFINE_PER_LCORE(uint8_t, _ip_var); /**< IP address variation */
> static struct udp_hdr pkt_udp_hdr; /**< UDP header of transmitted
> packets. */
>
> static void
> @@ -164,6 +165,7 @@ pkt_burst_transmit(struct fwd_stream *fs)
> uint16_t vlan_tci, vlan_tci_outer;
> uint32_t retry;
> uint64_t ol_flags = 0;
> + uint8_t ip_var = RTE_PER_LCORE(_ip_var);
> uint8_t i;
> uint64_t tx_offloads;
> #ifdef RTE_TEST_PMD_RECORD_CORE_CYCLES
> @@ -237,6 +239,23 @@ 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));
> + if (txonly_multi_flow) {
> + struct ipv4_hdr *ip_hdr;
> + uint32_t addr;
> +
> + ip_hdr = rte_pktmbuf_mtod_offset(pkt,
> + struct ipv4_hdr *,
> + sizeof(struct ether_hdr));
> + /*
> + * Generate multiple flows by varying IP src 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.
> + */
> + addr = (IP_DST_ADDR | (ip_var++ << 8)) +
> rte_lcore_id();
> + ip_hdr->src_addr = rte_cpu_to_be_32(addr);
> + }
> copy_buf_to_pkt(&pkt_udp_hdr, sizeof(pkt_udp_hdr), pkt,
> sizeof(struct ether_hdr) +
> sizeof(struct ipv4_hdr));
> @@ -268,6 +287,9 @@ pkt_burst_transmit(struct fwd_stream *fs)
> }
> fs->tx_packets += nb_tx;
>
> + if (txonly_multi_flow)
> + RTE_PER_LCORE(_ip_var) += nb_tx;
> +
> #ifdef RTE_TEST_PMD_RECORD_BURST_STATS
> fs->tx_burst_stats.pkt_burst_spread[nb_tx]++;
> #endif
> diff --git a/doc/guides/testpmd_app_ug/run_app.rst
> b/doc/guides/testpmd_app_ug/run_app.rst
> index 4495ed0382..b717b8c7b7 100644
> --- a/doc/guides/testpmd_app_ug/run_app.rst
> +++ b/doc/guides/testpmd_app_ug/run_app.rst
> @@ -324,6 +324,10 @@ The commandline options are:
> Set TX segment sizes or total packet length. Valid for ``tx-only``
> and ``flowgen`` forwarding modes.
>
> +* ``--txonly-multi-flow``
> +
> + Generate multiple flows in txonly mode.
> +
> * ``--disable-link-check``
>
> Disable check on link status when starting/stopping ports.
> --
> 2.11.0
