Dear Ming, Really thanks for reply,
about thresholds and waitbound OK! I'll adjust them in adapter.c , but what about enabling jumbo frames? should I do any thing special to enable Jumbo fram support? we were thinking that it is enabled by default. Is it? thanks ---------------------------------------- > From: [EMAIL PROTECTED] > To: [EMAIL PROTECTED]; [EMAIL PROTECTED]; [email protected]; > [EMAIL PROTECTED] > Subject: RE: ML403 gigabit ethernet bandwidth - 2.6 kernel > Date: Sat, 23 Jun 2007 18:48:19 +0000 > > Dear Mohammad, > There are some parameters which could be adjusted to improve the > performance. They are: TX and RX_Threshold TX and RX_waitbound. In my > system, we use TX_Threshold=16 and Rx_Threshold=8 and both waitbound=1. > > Also Jumbo frame of 8982 could be enable. > > Try those hints and share your improvement with us. > > BR > Ming > > >From: Mohammad Sadegh Sadri > >To: Andrei Konovalov , Linux PPC Linux > PPC, Grant Likely > >Subject: ML403 gigabit ethernet bandwidth - 2.6 kernel > >Date: Sat, 23 Jun 2007 12:19:12 +0000 > > > > > >Dear all, > > > >Recently we did a set of tests on performance of virtex 4FX hard TEMAC > module using ML403 > > > >we studied all of the posts here carefully: these are the system > characteristics; > > > >Board : ML403 > >EDK : EDK9.1SP2 > >Hard TEMAC version and PLTEMAC version are both 3.0.a > >PPC clock frequency : 300MHz > >Kernel : 2.6.21-rc7 , downloaded from grant's git tree some thing near one > week ago > >DMA type: 3 (sg dma) > >DRE : enabled for TX and RX, (2) > >CSUM offload is enabled for both of TX and RX > >tx and rx fifo sizes : 131072 bits > > > >the board comes up over NFS root file system completely and without any > problems. > > > >PC system used for these tests is : CPU P4 Dual Core, 3.4GHz , 2Gigabytes > memory, Dual gigabit ethernet port, running linux 2.6.21.3 > >We have tested the PC system band width and it can easily reach 966mbits/s > when connected to the same PC. ( using the same cross cable used for ml403 > test) > > > >Netperf is compiled with TCP SEND FILE enabled, ( -DHAVE_SENDFILE) > > > >(from board to PC) > >netperf -t TCP_SENDFILE -H 10.10.10.250 -F /boot/zImage.elf -- -m 16384 -s > 87380 -S 87380 > > > >the measured bandwidth for this test was just 40.66Mbits. > >It is also true for netperf from PC to board. > > > >we do not have any more idea about what we should do to improve the > bandwidth. > >any help or ideas is appreciated... > > > >_________________________________________________________________ > >Connect to the next generation of MSN > Messenger?>http://imagine-msn.com/messenger/launch80/default.aspx?locale=en-us&source=wlmailtagline > > >_______________________________________________ > >Linuxppc-embedded mailing list > >[email protected] > >https://ozlabs.org/mailman/listinfo/linuxppc-embedded > > _________________________________________________________________ > 免费下载 MSN Explorer: http://explorer.msn.com/lccn/ > _________________________________________________________________ News, entertainment and everything you care about at Live.com. Get it now! http://www.live.com/getstarted.aspx _______________________________________________ Linuxppc-embedded mailing list [email protected] https://ozlabs.org/mailman/listinfo/linuxppc-embedded
