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  1. #1
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    Default Performance numbers

    Our new Atheros support is progressing nicely, and are interested in what others are seeing as far as throughput on existing Atheros-based systems. (such as 802.11a/g APs or other software products, etc.).

    The numbers we are seeing with our new driver are quite good, however we do not have any basis for comparison.

    We are interested in these numbers:
    @ 802.11a (AP) <-> 802.11a (client) throughput tests in KBytes/sec
    @ 802.11a Turbo (AP) <-> 802.11a Turbo (client) throughput tests in KBytes/sec
    @ 802.11g (AP) <-> 802.11g (client) throughput tests in KBytes/sec
    @ 802.11g "108Mbps" (AP) <-> 802.11g (client) throughput tests in KBytes/sec

    Please mention if these tests are in a closed test environment, or actual deployments.

    If you have numbers for non-atheros 802.11a and 802.11g products, those numbers are also welcome.

    Thanks!

  2. #2
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    Default

    Hello Tony,

    I'll give you those numbers tomorrow - I don't have AP and antennas yet, so we were trying indoor ad-hoc only on AB520 Dlink PCI adapters. Basically, we got more than 2.5MB/s TCP/IP throughput using FTP (client-server) and Windows File Sharing. This is the same we got using 802.11g 2.4GHz adapters from SMC and other Taiwanese manufacturer.

    Do you plan to have Super A (or 802.11a Turbo 108Mbps) in your drivers? Would it be possible to use outdoors?

    bye, Lubomir.

  3. #3
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    Default

    There will be support for the 'A' and 'G' 108Mbps modes in the initial release.

    Thanks!

  4. #4
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    hello tony,

    do you have the specification and maybe some spectrum analyzer to confirm that 802.11a turbo mode takes 2x 20mhz bandwidth? Isn't it more?? Based on my measurements with enterprise-grade hardware (but not spectrum analyzer, it was just enterprise class radio system), standard bandwidth used by 802.11a normal mode is MUCH wider than stated 20MHz (I was able to find 40MHz !! of signal spread with pretty intensive power!!) - anything to this?

    thnx, lubomir.

  5. #5
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    Default

    Probably; there's most likely some sidelobes extending out from the 20mhz.
    108mbps (turbo) will be nice for interoffice type of networks, but for our outdoor stuff I think I am going to shoot for 24mbps (-75) or 36mbps (-73).
    We're looking at these cards:
    http://www.fament.com/catalog/produc...e666c6817a268b

  6. #6
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    Default Throughput Closed Env.

    11g: 8011 KBps :shock:
    11g turbo 7996 KBps :wink:

    Both machines are ATX 733 with dwl-ag520 in AP Mode and dwl-g520 as client.

    Tomorrow we'll give things a shot at 10 miles and see what we get.

    Do you guys have anymore of these left ATX733 or are you moving towards the WRAP boards

  7. #7
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    Default Re: Throughput Closed Env.

    Quote Originally Posted by datawork
    11g: 8011 KBps :shock:
    11g turbo 7996 KBps :wink:
    802.11g @ 8011 KBps = KiloBytes per sec? so mutiplied by 8 = 64088 Kbps (Kilobits per sec)
    Wouldn't that be in excess of 54Mbps ?

    Just wondering...

    - Szern

  8. #8
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    Default Re: Throughput Closed Env.

    Thanks for posting your numbers.

    These numbers seem accurate. The DWL-G520 (and all a/b/g cards) are Atheros 5212 based which provide performance enhancements that exceed 54Mbps actual throughput in many cases.

    The Atheros cards are indeed nice, with great performance potential.

    Thanks!

  9. #9
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    Default Re: Throughput Closed Env.

    Quote Originally Posted by datawork
    11g: 8011 KBps :shock:
    11g turbo 7996 KBps :wink:

    Both machines are ATX 733 with dwl-ag520 in AP Mode and dwl-g520 as client.

    Tomorrow we'll give things a shot at 10 miles and see what we get.

    Do you guys have anymore of these left ATX733 or are you moving towards the WRAP boards
    Turbo doesn't do much if you have a lot of signal around. Since it moves to Channel 6 it is bothered by almost everything. If you could get a clean environment you would see 12,000 KBps, or simply run this on 802.11a Turbo and rock and roll.

    Looking forward to the distance numbers. We have not yet tested externally, but that will happen on a couple of links next week. Time to stress test this driver.

    We are caught short because the WRAP boards are taking longer than anticipated. The ATX sold out real quick because we kept the same price but still included Server License. The 10 pack basically gave the motherboard, ram and flash for about $20, so it was a no brainer, or as I like to call it - You Snooze You Lose.
    ..a computer is a stupid machine with the ability to do incredibly smart things, while computer programmers are smart people with the ability to do incredibly stupid things. They are,in short, a perfect match..

    Try the latest 4.4.5.7-7842 release. It fixes the 11N card reset issue.
    http://www.star-os.com/ http://www.star-os.com/store

  10. #10
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    Default

    Wait, so you're saying that the .a numbers are much much much closer to the actual throughput.... IE 56mbps is near 56mbps actual throughput? Or is it like .b where 11mbps means 5mbps?
    Bob C

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