MSM4xx speed issue, recommended wlan chipsets?

[Maxxx]

Hi,

Does anyone have some info about which wlan chipsets play nice with those MSM APs?
I tested an MSM422 running at pure N 5GHz with a Thinkpad T400s which has a built-in intel wifilink 5300 pcie card.
Wifi settings were set to no powersave, maximum performance.
The Notebook was directly in front of the AP.
Settings in the AP were Pure N 20/40 width, channel auto, internal antennas.

Running iperf from both linux and windows 7 resulted in about 4Mbyte/s to the access point's built-in iperf server.
File transfers to a fileserver connected via 1GBit to the accesspoint also didn't exceed 3MByte/s.
The accesspoint was either directly connected to a hp 1810G-24 using hp's poe injector, or connected to a cisco poe GBE switch.. rates didn't differ at all.


Are there any known limitations and/or speed issues with intel nics especially the wifilink 5300?

Which chipset would you suggest? What about Ralink?


Thanks very much for any info and help

Max

[Maxxx]

I should probably add that windows displayed the wifi rate as 300mbit/s

[kianwei]

Concurrently only you (1 user) connect to that AP?

[Maxxx]

Yes, only me

[kianwei]

Any others wifi channel in your environment? Does latency is good from laptop to AP? Which firmware version you are running currently?

[Maxxx]

Thanks for your support!

No other networks are using the 5GHz band. The AP is completely lonely ;)

Firmware version is 5.4.0.

I also got a MSM410 running the same firmware..
I'll try it with that one and report back.

Thank you,

Max

[Maxxx]

This is rather strange.

Here's the iperf log with two different fw's (still had the old 5.3 on that device)

BTW: ping delays are low.

fw: 5.3.1.0-01-7143





bin/iperf.exe -c 192.168.11.2 -P 1 -i 1 -p 5001 -f m -t 1000

------------------------------------------------------------

Client connecting to 192.168.11.2, TCP port 5001

TCP window size: 0.01 MByte (default)

------------------------------------------------------------

[148] local 192.168.11.50 port 49199 connected with 192.168.11.2 port 5001

[ ID] Interval Transfer Bandwidth

[148] 0.0- 1.0 sec 5.95 MBytes 49.9 Mbits/sec

[148] 1.0- 2.0 sec 5.82 MBytes 48.8 Mbits/sec

[148] 2.0- 3.0 sec 4.03 MBytes 33.8 Mbits/sec

[148] 3.0- 4.0 sec 0.00 MBytes 0.00 Mbits/sec

[148] 4.0- 5.0 sec 0.00 MBytes 0.00 Mbits/sec

[148] 5.0- 6.0 sec 0.00 MBytes 0.00 Mbits/sec

[148] 6.0- 7.0 sec 0.00 MBytes 0.00 Mbits/sec

[148] 7.0- 8.0 sec 0.00 MBytes 0.00 Mbits/sec

[148] 8.0- 9.0 sec 0.00 MBytes 0.00 Mbits/sec

[148] 9.0-10.0 sec 0.00 MBytes 0.00 Mbits/sec

[148] 10.0-11.0 sec 5.77 MBytes 48.4 Mbits/sec

[148] 11.0-12.0 sec 5.90 MBytes 49.5 Mbits/sec

Done.



bin/iperf.exe -c 192.168.11.2 -P 1 -i 1 -p 5001 -w 64.0K -f m -t 1000

------------------------------------------------------------

Client connecting to 192.168.11.2, TCP port 5001

TCP window size: 0.06 MByte

------------------------------------------------------------

[148] local 192.168.11.50 port 49200 connected with 192.168.11.2 port 5001

[ ID] Interval Transfer Bandwidth

[148] 0.0- 1.0 sec 6.54 MBytes 54.9 Mbits/sec

[148] 1.0- 2.0 sec 6.43 MBytes 53.9 Mbits/sec

[148] 2.0- 3.0 sec 6.53 MBytes 54.8 Mbits/sec

[148] 3.0- 4.0 sec 6.47 MBytes 54.3 Mbits/sec

[148] 4.0- 5.0 sec 6.55 MBytes 54.9 Mbits/sec

[148] 5.0- 6.0 sec 6.52 MBytes 54.7 Mbits/sec

[148] 6.0- 7.0 sec 6.52 MBytes 54.7 Mbits/sec

[148] 7.0- 8.0 sec 6.47 MBytes 54.3 Mbits/sec

[148] 8.0- 9.0 sec 6.49 MBytes 54.5 Mbits/sec

[148] 9.0-10.0 sec 6.61 MBytes 55.4 Mbits/sec

[148] 10.0-11.0 sec 6.45 MBytes 54.1 Mbits/sec

[148] 11.0-12.0 sec 6.52 MBytes 54.7 Mbits/sec

[148] 12.0-13.0 sec 6.49 MBytes 54.5 Mbits/sec

[148] 13.0-14.0 sec 6.54 MBytes 54.9 Mbits/sec

[148] 14.0-15.0 sec 6.58 MBytes 55.2 Mbits/sec

[148] 15.0-16.0 sec 6.52 MBytes 54.7 Mbits/sec

[148] 16.0-17.0 sec 6.54 MBytes 54.9 Mbits/sec

[148] 17.0-18.0 sec 6.51 MBytes 54.6 Mbits/sec

[148] 18.0-19.0 sec 6.45 MBytes 54.1 Mbits/sec

[148] 19.0-20.0 sec 1.28 MBytes 10.7 Mbits/sec

[ ID] Interval Transfer Bandwidth

[148] 20.0-21.0 sec 0.00 MBytes 0.00 Mbits/sec

[148] 21.0-22.0 sec 0.00 MBytes 0.00 Mbits/sec

[148] 22.0-23.0 sec 0.00 MBytes 0.00 Mbits/sec

[148] 23.0-24.0 sec 0.00 MBytes 0.00 Mbits/sec

[148] 24.0-25.0 sec 0.00 MBytes 0.00 Mbits/sec

[148] 25.0-26.0 sec 0.00 MBytes 0.00 Mbits/sec

[148] 26.0-27.0 sec 2.93 MBytes 24.6 Mbits/sec





fw: 5.4.0.0-01-8027



bin/iperf.exe -c 192.168.11.2 -P 1 -i 2 -p 5001 -w 64.0K -f m -t 1000

------------------------------------------------------------

Client connecting to 192.168.11.2, TCP port 5001

TCP window size: 0.06 MByte

------------------------------------------------------------

[148] local 192.168.11.50 port 49204 connected with 192.168.11.2 port 5001

[ ID] Interval Transfer Bandwidth

[148] 0.0- 2.0 sec 12.9 MBytes 54.0 Mbits/sec

[148] 2.0- 4.0 sec 12.8 MBytes 53.5 Mbits/sec

[148] 4.0- 6.0 sec 12.7 MBytes 53.2 Mbits/sec

[148] 6.0- 8.0 sec 12.8 MBytes 53.7 Mbits/sec

[148] 8.0-10.0 sec 13.0 MBytes 54.7 Mbits/sec

[148] 10.0-12.0 sec 13.0 MBytes 54.4 Mbits/sec

[148] 12.0-14.0 sec 12.8 MBytes 53.5 Mbits/sec

[148] 14.0-16.0 sec 12.9 MBytes 54.1 Mbits/sec

[148] 16.0-18.0 sec 12.7 MBytes 53.1 Mbits/sec

[148] 18.0-20.0 sec 13.0 MBytes 54.6 Mbits/sec

[148] 20.0-22.0 sec 12.9 MBytes 54.1 Mbits/sec

[148] 22.0-24.0 sec 12.8 MBytes 53.8 Mbits/sec

[148] 24.0-26.0 sec 12.9 MBytes 54.2 Mbits/sec

[148] 26.0-28.0 sec 12.4 MBytes 52.1 Mbits/sec

[148] 28.0-30.0 sec 12.8 MBytes 53.7 Mbits/sec

[148] 30.0-32.0 sec 12.9 MBytes 54.0 Mbits/sec







So the rates with the new firmware are stable.
When transferring a file I get 10mbyte/s with this unit, where's I only get 3mb/s with the msm422.

But it's very suspicious that rates in iperf seem to be capped at 54mbit.
This leads me to the assumption that either I configured something wrong in the AP, or that there's a problem with the laptop. But since this happens under linux and windows I don't think that it's very probable.

Do you know some settings in the Accesspoint which could lead to those poor results? I left everything at default except I disabled security filters, enabled wpa psk, set mode to pure N 5Ghz, cahnnel width auto, guard interval short..

I'll test with another notebook tonight.

Thank you!

[kianwei]

The results you perform previously is from MSM410 on ver5.4 firmware as well? I can read 3 test you performed.
The i-perf won't cap at 54Mbit. If you try wired connection you should getting near to full speed.
Try to use old firmware version like 5.3.1 it would be stable a bit in term of signal. Besides, try to use a/n instead of pure 'N'. Try to doing the test using the other laptop. Make sure is 5GHz n capable.

[Maxxx]

Hi, the first (unstable) result was with firmware 5.3.x
The results with 5.4 are stable.

I have N in 5 GHz mode.. Now you want me to test mixed mode N/a did I get you right?

Thnx!

[kianwei]

yes..so any update?