Bill: Thank you! disable CHECKSUM_CHECK_UDP and CHECKSUM_GEN_UDP gave a considerable increase in performance. Xilinx gui interface for lwip could use some significant improvement to make this and many other features more accessible.
Chris: I've increased some of these values (listed below) but haven't seen much improvement from that. Do these look ok or have you had better success with others? #define MEM_ALIGNMENT 8 #define MEM_SIZE 262144 #define MEMP_NUM_PBUF 32 #define MEMP_NUM_UDP_PCB 8 #define MEMP_NUM_TCP_PCB 32 #define MEMP_NUM_TCP_PCB_LISTEN 8 #define MEMP_NUM_TCP_SEG 256 #define LWIP_USE_HEAP_FROM_INTERRUPT 1 #define MEMP_NUM_SYS_TIMEOUT 8 #define PBUF_POOL_SIZE 256 #define PBUF_POOL_BUFSIZE 2048 #define PBUF_LINK_HLEN 16 On Wed, Sep 23, 2009 at 11:06 PM, Chris Strahm <[email protected]> wrote: > Actually someone else reported to me that turning the checksum off in lwIP > actually made it slower. I have not checked the reason for this, but that > was someone else's experience. There is a big difference in whether you use > 8/16/32 bit memcpy type routines. Also if you can write it in asm. Since > yours is FPGA, little different. Also same kind of thing for checksum. Asm > will be faster. Sometimes the difference in how a particular variable or > address pointer is generated by C can result in very big difference in code. > You have to look at everything when it comes to high performance. > > Also what is the size of your PBUFs and your blocks in your DMA or MAC ISR. > I assume for a 1G Enet system you probably want the maximum, about 1536 > each. > > Chris. > > > > _______________________________________________ > lwip-users mailing list > [email protected] > http://lists.nongnu.org/mailman/listinfo/lwip-users > _______________________________________________ lwip-users mailing list [email protected] http://lists.nongnu.org/mailman/listinfo/lwip-users
