Network socket is terribly slow when receiving data on C66x

Yuichi Urai

I found that the bandwidth of data transfer via socket (from PC to C66x) in our application was really slow, like ~1Mbps.

While I was nailing down the root cause, I found that even the network benchmark in the HUA demo was also terribly slow when receiving the data. The speed of transmitting (C66x to PC) was somewhat reasonable. Receiving was really slow and never completed. I tried HUA demo apps the one on the board (2.00.00.02 Beta 2) and the one that was a part of mcsdk_2_00_05_17, and both showed the same symptom. I saw the same kind of post.

I don't see anything strange in the following information. Where should I look for the cause of the problem?

Best regards,

Platform Information

Board	TMDSEVMC6678L
Board Revision	11
CPU Frequency	1000 MHz
Number of CPU's (Cores)	8
CPU Revision	0
Core we are running on	0
Endian Mode	Big
User Switch 1	On
User Switch 2	On

SDK Program Versions

HUA	2.00.00.02 Beta 2
Platform Library	2.00.00.05
CSL	@(#) CSL Revision: 01.00.00.10;:Feb 20 2011:20:28:35
PA LLD	PA LLD Revision: 01.01.00.07:Feb 20 2011:20:46:34
QMSS LLD	QMSS LLD Revision: 01.00.00.14:Feb 20 2011:20:31:24
CPPI LLD	CPPI LLD Revision: 01.00.00.14:Feb 20 2011:20:29:48

Switch Configuration (Port 1) 1=Enabled, 0=Disabled

Full Duplex Enabled	1
Gigabit Enabled	1
Force Gigabit Enabled	0
Idle Mode Enabled	0
Loopback Enabled	0
GMII Enabled	1
Rx Flow Control Enabled	0
TxFlowControl Enabled	0
Tx Pacing Enabled	0
Rx CEF Enabled	0
Rx CSF Enabled	1
Max Receive Frame Length	1518

over 13 years ago

0 ArunMani over 13 years ago

TI__Genius 9915 points

Is you setup a standalone setup or is in the public network?

Thanks,

Arun.

0 Yuichi Urai over 13 years ago in reply to ArunMani

Prodigy 205 points

It was on a public network. I tried a peer-to-peer connection via a crossover Ethernet cable, but the same was true. The benchmark test that transfers data from PC to C66x didn't finish, but the opposite direction showed a moderate speed.

Besides, the original application of ours, which I found a slow socket transfer speed, didn't have a problem with a DM6437EVM board on the same network.

Best regards,

-Yuichi

0 Yuichi Urai over 13 years ago in reply to Yuichi Urai

Prodigy 205 points

Is there anything else I need to check? Is there any requirement on firewall settings or anything?

0 ArunMani over 13 years ago in reply to Yuichi Urai

TI__Genius 9915 points

Let me try it in my setup and get back to you.

Thanks,

Arun.

0 Yuichi Urai over 13 years ago in reply to ArunMani

Prodigy 205 points

Thank you. I appreciate that.

-Yuichi

0 ArunMani over 13 years ago in reply to Yuichi Urai

TI__Genius 9915 points

Hi Yuichi,

I tried HUA demo and this is what i got. it seems it is about 159Mbps.

Are you not seeing this?

Thanks,

Arun.

0 Yuichi Urai over 13 years ago in reply to ArunMani

Prodigy 205 points

Hi Arun,

No. All I got was ".....Failed to receive...please re run the test".

Thanks,

-Yuichi

0 ArunMani over 13 years ago in reply to Yuichi Urai

TI__Genius 9915 points

Hi Yuichi,

Can you upgrade to new MCSDK? I can consistently get the throughput i mentioned.

Thanks,

Arun

0 Yuichi Urai over 13 years ago in reply to ArunMani

Prodigy 205 points

Hi Arun,

I've tested binaries coming with mcsdk 2.00.07.19. Now I'm getting 93Mb/sec, which is a good news. But when I tried to re-run the same application, I got the same error. It turned out that I needed to power-cycle the eval board to run the test successfully. System reset from CCS5.1.1 didn't help. Does this happen to you? I'm wondering if this means that the sample application misses some important reset function? This is not a good feature for our automated tests. BTW, FYI, the older version (2.00.05.17) didn't complete the test successfully even right after the power-cycle.

I'm going to rebuild our application with updated libraries and see if there's any improvement in the network speed.

Thanks a lot.

-Yuichi

0 BhavinKharadi over 13 years ago in reply to Yuichi Urai

TI__Genius 9020 points

Yuichi,

Are you running the GEL file after doing system reset? Try doing system reset --> Run GEL --> re run your application.

Regards,

Bhavin

0 Yuichi Urai over 13 years ago in reply to BhavinKharadi

Prodigy 205 points

Bhavin,

I couldn't find Run GEL command on my CCS5.1.1. Could you please be more specific?

BTW, I tried "Scripts"->"EVMC6678L Init Functions"->"Global Default Setup" and it didn't work. I also reloaded GEL file, which also didn't help.

Thanks,

-Yuichi

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Network socket is terribly slow when receiving data on C66x

Platform Information

SDK Program Versions

Switch Configuration (Port 1) 1=Enabled, 0=Disabled