From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from smtprelay04.ispgateway.de (smtprelay04.ispgateway.de [80.67.31.31]) by ozlabs.org (Postfix) with ESMTP id C297FB6EF3 for ; Tue, 22 Dec 2009 20:18:33 +1100 (EST) Message-ID: <4B308F14.7000800@ronetix.at> Date: Tue, 22 Dec 2009 11:19:16 +0200 From: RONETIX - Asen Dimov MIME-Version: 1.0 To: linuxppc-dev@lists.ozlabs.org Subject: Re: MPC8313e RDB rev A4 and rev C network throughput References: <4B2FF66E.7000209@ronetix.at> In-Reply-To: Content-Type: text/plain; charset=ISO-8859-1; format=flowed Cc: Liu Dave-R63238 List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Hi, I checked the RCW(RCWLR and RCWHR) and they are the same(taken from NOR), S3 and S4 switches are the same too. I will take a look at the priority levels on CSB. Regards, Asen Liu Dave-R63238 wrote: > One possible cause is the two board has different RCW. > So that the freq of core/csb/.... Is different. > > >> -----Original Message----- >> From: >> linuxppc-dev-bounces+daveliu=freescale.com@lists.ozlabs.org >> [mailto:linuxppc-dev-bounces+daveliu=freescale.com@lists.ozlab >> s.org] On Behalf Of RONETIX - Asen Dimov >> Sent: Tuesday, December 22, 2009 6:28 AM >> To: linuxppc-dev@lists.ozlabs.org >> Subject: MPC8313e RDB rev A4 and rev C network throughput >> >> Hello all, >> I have made some test on network throughput with MPC8313e RDB >> revA4 and revC. >> Some have mentioned that CSB(Coherent System Bus) frequency >> or untuned TCP/IP stack, could cause decrease of network throughput. >> >> **Test results >> >> -on MPC8313e RDB revA4 with kernel 2.6.20 and u-boot 1.1.6 >> created with >> ltib-mpc8313erdb-20070824 >> iperf -c 172.16.0.1 -l 2m -w 256k -throughput is 510Mbps >> >> >> -on MPC8313e RDB revA4 with kernel 2.6.23 and u-boot 1.3.0 generated >> with ltib-mpc8313erdb-20081222 >> iperf -c 172.16.0.1 -l 2m -w 256k >> -throughput is 510Mbps >> >> >> -on MPC8313e RDB revC with kernel 2.6.23 (the same u-boot, kernel and >> rootfs as in rev A4, only dtb file differs) >> iperf -c 172.16.0.1 -l 2m -w 256k >> -throughput is 360Mbps. >> >> >> Have someone made such measurements? Any ideas why MPC8313e RDB revC >> gives worser throughput than revA4? >> >> ** Notes >> *The PC (CPU:Intel(R) Core(TM)2 Duo CPU, E8400 @ 3.00GHz; >> RAM: 2x2G DDR2 @ 800Mhz ; >> NIC: R8168B PCI Express Gigabit Ethernet controller, driver >> 8.014.00-NAPI; >> OS: Fedora release 10 (Cambridge) with kernel: >> 2.6.27.38-170.2.113.fc10.i686.PAE #1 SMP ) >> *Commnads to set PC >> >> ethtool -s eth0 autoneg off speed 1000 duplex full >> ifconfig eth1 172.16.0.1/12 mtu 6000 txqueuelen 10000 >> echo 131071 > /proc/sys/net/core/rmem_max >> echo 131071 > /proc/sys/net/core/wmem_max >> echo "4096 1048576 8388608" > /proc/sys/net/ipv4/tcp_rmem >> echo "4096 1048576 8388608" > /proc/sys/net/ipv4/tcp_wmem >> iperf -s -l 2m -w 70k >> >> >> *The MPC8313e RDB(CPU: 333Mhz; CSB: 166Mhz) revA4 and >> revC(using PHY not >> switch) >> *Commnads to set a board before using iperf >> >> ifconfig eth1 172.16.0.1/12 mtu 6000 txqueuelen 10000 >> #The PC lan card is set to advertise 1000Mbps only, so the >> board switches to 1000Mbps too. >> echo 131071 > /proc/sys/net/core/rmem_max >> echo 131071 > /proc/sys/net/core/wmem_max >> echo "4096 1048576 8388608" > /proc/sys/net/ipv4/tcp_rmem >> echo "4096 1048576 8388608" > /proc/sys/net/ipv4/tcp_wmem >> >> Regards, >> Asen >> >> _______________________________________________ >> Linuxppc-dev mailing list >> Linuxppc-dev@lists.ozlabs.org >> https://lists.ozlabs.org/listinfo/linuxppc-dev >> >> >>