Hi Meganathan,
Is lwip computing the checksum? You might time it to see how much
throughput it has.
Have you used Wireshark to try to diagnose what is going on?
We are using lwip on a 456MHz TI TMS320C6748 with 100M Ethernet and get
~60Mbps
Regards
TK
On 11/15/2024 12:33 PM, Meganathan Raja Mani wrote:
Hi Norbert,
Thank you for your reply. I tried with the option below, but got the
same result only.
#define LWIP_WND_SCALE1
#define TCP_RCV_SCALE 7
#define LWIP_TCP_SACK_OUT 1
Regards,
Meganathan
On Tue, Nov 12, 2024 at 9:06 AM Norbert Morawski
<[email protected]> wrote:
Maybe try window scaling?
On November 12, 2024 17:18:41 Meganathan Raja Mani
<[email protected]> wrote:
Hi
Integrated the lwIP stack over DPDK and the application is
written by using the lwIP raw API(NO_SYS=1).
The main purpose of the application is to get max TCP
throughput(10Gbps).
Application is in full receiving(server) mode, which just sends
ACK for the client data.
The lwIP application and client app are cross connected with
10Gbps intel 82599 NIC card.
The application has three threads. Each thread is pinned to a
separate core(Intel Xeon 3.1 GHz).
All the threads are running in a poll mode.
1. One thread receives the packets from DPDK and enqueues into
rte ring.
2. Second thread takes the packets from rte ring and converts
into pbuf and then passes it to lwIP stack by calling
ip_input function. In the receive callback, the app just
frees the pbuf(does nothing).
3. Third thread reads data from lwIP stack and sends out to DPDK
Changed following things in lwIP stack.
#define TCP_TMR_INTERVAL 5 /* The TCP timer interval in
milliseconds. */
#define MEMP_NUM_PBUF (10028)
#define MEMP_NUM_TCP_SEG 160
#define TCP_SND_QUEUELEN MEMP_NUM_TCP_SEG
#define PBUF_POOL_SIZE (10 * 1024)
#define TCP_MSS 1460
#define TCP_WND 65535
#define LWIP_CHECKSUM_ON_COPY 1
#define TCP_SND_BUF 65535
#define TCP_SNDLOWAT TCP_SND_BUF/2
#define MEMP_NUM_TCPIP_MSG_INPKT 160
#define CHECKSUM_CHECK_IP 0
#define CHECKSUM_CHECK_TCP 0
#define LWIP_DEBUG 0
#define LWIP_ICMP 1
#define MEM_USE_POOLS 1
#define MEM_SIZE (128 * 1024 * 1024)
#define MEM_ALIGNMENT 4
#define ETH_PAD_SIZE 2
#define LWIP_CHKSUM_ALGORITHM 2
#define LWIP_TCP_KEEPALIVE 1
Disable nagle(tcp_nagle_disable) for the pcb
The stats_display() function doesn’t show any errors.
With this,I can get max 2K packets per second(25 Mbps), which is
very low.
Any info about the max throughput can we get it with lwIP TCP
protocol on any platform?
Please let me know what I should do to get max throughput (line
rate 10 Gbps).
Regards,
Meganathan
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