From: RONETIX - Asen Dimov <dimov@ronetix•at>
To: linuxppc-dev@lists•ozlabs.org
Cc: Liu Dave-R63238 <r63238@freescale•com>
Subject: Re: MPC8313e RDB rev A4 and rev C network throughput
Date: Tue, 22 Dec 2009 11:19:16 +0200 [thread overview]
Message-ID: <4B308F14.7000800@ronetix.at> (raw)
In-Reply-To: <D7CCA83BB0796C49BC0BB53B6AB1208985F8CF@zch01exm21.fsl.freescale.net>
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
>>
>>
>>
prev parent reply other threads:[~2009-12-22 9:18 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-12-21 22:27 MPC8313e RDB rev A4 and rev C network throughput RONETIX - Asen Dimov
2009-12-22 3:47 ` Liu Dave-R63238
2009-12-22 9:19 ` RONETIX - Asen Dimov [this message]
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