DM368's net transmission performance

jun yang62451 said:

We test DM368's tcp/ip transport performace is only upto 6MB/s( DM368 to PC ). But the same test program can upto 11MB/s  running  on PC to PC.

What PHY you use on device and PC and how you test network bandwidth? Can you run iperf http://sourceforge.net/projects/iperf/ in server/client mode on your device?

Dear Kirill.

  Thanks your reply.

  I run iperf on my DM368's system. The tcp/ip transfer performace ( DM368 to PC )can reach about 7MB/s.

  I find that the transfer performance of DM368's EVM is 50.8Mb/s in spec DaVinci_PSP_03.01_GA_(r38)_Release_Notes.pdf.

Q: Why DM368 cann't reach the maximum transfer performace?

    Is there a way to improve the performace?

Thanks

If I right 7MB/s = 7 * 8 = 56Mb/s

What PHY you use on board and how you configure it?

Yes, It's 56Mb/s.

The PHY is KSZ8041 on our board. The PHY's configure is the same with DM368's EVM. We donot modify the linux driver.

Can DM368's net transfer performace reach the maximum? How to achieve it?

Thanks.

You can try bandwitch with UDP and and certainly you must have 100Mb/s link between board and PC.

Sorry, I can't check this because we are not work with KSZ8041, but I can try check this on Marvell 88E1111

Test result (PC <---> D-Link DGS-1008P <---> ARM):
board - DM365 297MHz, PHY Marvell 88E1111, 2.6.18_pro500, iperf-2.0.5
~ # ./iperf -s
------------------------------------------------------------
Server listening on TCP port 5001
TCP window size: 85.3 KByte (default)
------------------------------------------------------------
[  4] local 192.168.255.2 port 5001 connected with 192.168.255.1 port 42345
[ ID] Interval       Transfer     Bandwidth
[  4]  0.0-10.0 sec   112 MBytes  94.1 Mbits/sec
~ # ./iperf -c 192.168.255.1
------------------------------------------------------------
Client connecting to 192.168.255.1, TCP port 5001
TCP window size: 16.0 KByte (default)
------------------------------------------------------------
[  3] local 192.168.255.2 port 3154 connected with 192.168.255.1 port 5001
[ ID] Interval       Transfer     Bandwidth
[  3]  0.0-10.0 sec  95.8 MBytes  80.3 Mbits/sec

PC - Intel(R) Pentium(R) 4 CPU 3.00GHz, D-Link System Inc DGE-528T Gigabit Ethernet Adapter (rev 10), 2.6.32-5-686, iperf-2.0.4
$ iperf -c 192.168.255.2
------------------------------------------------------------
Client connecting to 192.168.255.2, TCP port 5001
TCP window size: 16.0 KByte (default)
------------------------------------------------------------
[  3] local 192.168.255.1 port 42345 connected with 192.168.255.2 port 5001
[ ID] Interval       Transfer     Bandwidth
[  3]  0.0-10.0 sec    112 MBytes  94.2 Mbits/sec
$ iperf -s
------------------------------------------------------------
Server listening on TCP port 5001
TCP window size: 85.3 KByte (default)
------------------------------------------------------------
[  4] local 192.168.255.1 port 5001 connected with 192.168.255.2 port 3154
[ ID] Interval       Transfer     Bandwidth
[  4]  0.0-10.0 sec  95.8 MBytes  80.2 Mbits/sec

Dear Kirill.

Thanks your test and reply.

Our board direct connect to PC, the cable can achieve 1Gb/s transfer. But the TCP/IP test result (board send to PC ) is still about 56Mb/s, PC send to board is 72Mb/s.

In dvsdk_dm365-evm_4_01_00_09_setuplinux's DaVinci_PSP_03.01_GA_(r38)_Release_Notes.pdf, it say the DM365 EVM's max performance is 50.6Mb/s.

From EVM's Schematics, I find that the PHY is KSZ8001 .

Why do you use Marvell 88E1111 instead of KSZ8001 on DM365's board? Is the board updated?

I find the 88E1111 is 1Gb/100Mb/10Mb PHY. Is the reason the PHY?

Thanks

We are can't buy KSZ8001 and we are don't search "light" way ;) Our camera must send video on 1Gb/s and 100Mb/s.

Dear Kirill.

 The DM365 and DM368 are only support 100Mb/s and 10Mb/s, aren't they? Why do you support 1Gb/s transfer rate?