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Poor transfert rate in wifi mode !!!

Discussion in 'DD-WRT Firmware' started by MilesTEG, May 5, 2005.

  1. MilesTEG

    MilesTEG Network Guru Member

    Hello,
    I use the great DD-WRT #22 prefinal5 (Talismen) (laste update)
    I'm very happy with it because of the many options I can set up !
    But, there is a point who I am not very happy with... the wireless rate !!

    The wireless rate is so poor : 900-1080 ko/s !!!!

    With the official firmware and HyperWRT, I had 3000-3500 ko/s !

    Why does the datarate is so slow... ?

    Does exist anything I can do to have a better datarate ?

    Thanks for all
    ++
    Miles
     
  2. joshag

    joshag Network Guru Member

    Having used nothing but Sveasoft before this I believe that it comes from the original Alchemy pre5a that DD was forked from. I remember reading something about a driver change between Satori and Alchemy?
     
  3. MilesTEG

    MilesTEG Network Guru Member

    I don't understand very much...
    "Having used nothing but Sveasoft before this" ???

    So DD-WRT is based on an old version of alchemy ?
     
  4. Couledouce

    Couledouce Network Guru Member


    Yes it's no secret, just read the DD-WRT front page: http://www.dd-wrt.com/
     
  5. MilesTEG

    MilesTEG Network Guru Member

    erf...
    you're right !
    Is the next release of dd-wrt will be based on the last alchemy ???

    If not, is it risked to go with the alchemy final version ?
     
  6. XCOM7

    XCOM7 Network Guru Member

    Risk?
    Mhhhh as far as I know Final is been nothiong but problems...
     
  7. MilesTEG

    MilesTEG Network Guru Member

    :oops: :oops: I'm not sure to understand...
    you say that with alchemy there is only problems ??
    or with alchemy there is no problems ??

    Sorry for my poor english.
     
  8. joshag

    joshag Network Guru Member

    Allot of sveasoft users thoutht that Alchemy pre5a was the last good Alchemy release while some thought it was too flakey. The biggest issue was known PPPoE problems but I believe BrainSlayer understood and fixed.
    Personally it was a favorite for me. I still have two routers using it at another location.
    The complaints about the Alchemy 1.0 final release (7a internal) were DHCP, and WPA w/ WDS when more than 2 routers were used. DHCP and WPA were not big issues with pre5a. Alchemy was feature frozen by this point and the more they tweaked the bugs the more it broke in other places.
    It sounds like, from reading, that BrainSlayer realizes the weaknesses and is working to improve the original and take it in its own direction. He has already worked in more features and, again from reading, is doing a better job at compression allowing the firmware to be used on all flavors of WRT's.
     
  9. joshag

    joshag Network Guru Member

    In their defense, Sveasoft / James, abandoned Alchemy in its current state because of popular demand by the subscribers. It was polled and most said that they wanted to move on and beta test the new Sveasoft Talisman firmware.
     
  10. jagboy

    jagboy Network Guru Member

    lets not get into a flamewar or a gpl disscussion please.

    ok bakc on track yes dd-wrt is based on alchemy but it will soon move to openwrt source tree.

    and the wireless you are having miles could be hard reset could fix
     
  11. joshag

    joshag Network Guru Member

    Never tried to flame them. Maybe "abandoned" was an extreme term. They stopped "development" on the firmware because the majority of subscribers were anxious to test drive their new firmware.

    I am a Sveasoft subscriber and have never had a bad thing to say about them. I have, in the past, many times recommended their firmware to people looking for certain features. I think they do an excellent job. Proof of that is the building block of this firmware.

    I am here and using/praising DD-WRT because I am always looking for a better mouse trap. When Sveasoft gets their verson runing a bit smoother I will probably use these two firmwares together in my network for each has its strong points.

    I am a firm believer in never "flaming" / biting the hand that feeds.
     
  12. MilesTEG

    MilesTEG Network Guru Member

    ;) It should be a great thing ^^
    But i hope the gui interface will be keeped with a migration of code source to openWRT !

    Thanks
    ++
     
  13. PaCkEtGrEmLiN

    PaCkEtGrEmLiN Network Guru Member


    Hi Miles,

    I believe the poor wirless performance is the result of the Broadcom wireless driver currently implemented in Alchemy that DD-WRT is forked from. This driver was probably choosen for stability/bug fixes.

    Since it appears that BrainSlayer is moving over to openWRT sourcetree I wonder if anybody can comment on openWRT's current Wlan performance for WRT54GS ? If it's on par with Linksys then that is encouraging.

    Here are some wireless throughput tests with various favours of Alchemy and of course the forked DD-WRT referenced to the latest Linksys GS firmware....

    >Used IXIA Qcheck WiFi performance monitor
    >Hardware was 3m apart with no obstructions
    >WMP54GS v1.0 Wireless-G PCI Adapter with Linksys WinXP driver 3.50.21.11
    >WRT54GS v1.0

    ==========================================

    Firmware __________ Average (Mbps) ___ Max (Mbps)
    Alchemy/DD-WRT ____ 17 ______________ 21
    Linksys 3.37.6 (GS) __ 29 ______________ 34

    ===========================================

    Regards.
     
  14. Lazybones

    Lazybones Network Guru Member

    This would explain my performance problems exactly with my system. I top out at 3 Mbits/s on all transfers.. And thats with a linksys PC Card that supports speed boost... I mostly use my WRT for the QOS features found in Alchmeny so I am running the 1.0 final release.. If DD-WRT fixes this performance problem that would be great. I mostly use the laptop for web browsing but it would be nice if I could stream files on my local network at faster speeds.

    3 Mbits/s is much slower than the 54 that that you can get in theory with wirless G and is MUCH slower than the 35% boost that speed booster is supposed to give you.
     
  15. joshag

    joshag Network Guru Member

    Speed is also obviously affected by security. You will see faster transfers with no security or WEP. WPA creates a heavier load and will slow transfers.

    Alchemy was plagued by more than just the broadband drivers but I can't remember what the secondary problem was??????? Old age and alcohol.
     
  16. knight14th

    knight14th Network Guru Member

    I use VPN for security reasons. Therefore there is no WEP or WPA in my WLAN. But the transfer rates were still not as good as thay should be (without VPN). Pure WLAN makes something about 1,2-2MB/s. Using the VPN-tunnel (not the build-in PPTPd) I get 1MB/s.
     
  17. Lazybones

    Lazybones Network Guru Member

    The 3 Mbits/s is consistent with or without WEP enabled. I suspect that it is a driver problem like stated. I haven't loaded the Official firmware for a while... Maybe I will get around to it, and test the speeds.
     

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