From: "Geo" 

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All I know is if I switch from 10baseT to 100baseT I see approx a 10x =
speed increase, so I would expect gigabit to provide that same kind of =
speed increase over 100baseT even without jumbo frames. If it doesn't  =
because of your "other factors" then they had no business calling
it = gigabit did they?  From what I'm seeing it should have been =
200baseT..

Geo.
  "Rich"  wrote in message news:4291535e{at}w3.nls.net...
     Gigabit helps with throughput but not with other factors like =
latency or interrupt overhead.

     The increase mike described from jumbo frames is smaller than I =
would expect.  It could be his configuration.

  Rich


    "Geo"  wrote in message =
news:42914c5e$1{at}w3.nls.net...
    Well without any tuning of any kind here I get 7MB/s copying a 357MB =
file from my laptop to my server on 100baseT, so going to 1000baseT I =
would expect a 10x speed improvement.

    You guys aren't getting anywhere near that kind of thruput so it's =
obvious to me that both you guys have a serious bottleneck somewhere. =
Personally my guess would be disk speed.

    Geo.
      "Rich"  wrote in message news:4290f134$1{at}w3.nls.net...
         Mike's setup may have other factors that hurt it.  Maybe it's =
his network adapters, poor drivers, or the operating system tcpop =
implementation.  He should probably provide those details.

         At my home without jumbo frames using a 32-bit PCI adapter on a =
desktop talking to a laptop with a PCI-E chipset I see 17 MB/s.  I can't =
try jumbo frames because my switch doesn't support them.  Between two =
32-bit PCI desktops I only get 16-1/4 MB/s.

      Rich

        "Geo"  wrote in message =
news:42909241{at}w3.nls.net...
        "Mike '/m'"  wrote in message
        news:2t1191dc52gqb7iqic14bo0iv8mp82ov9u{at}4ax.com...

        > 100mbps ethernet - 7-8MB/s throughput
        > 1000mbps ethernet on PCI bus, regular frames - 10MB/s
        > 1000mbps ethernet on PCI bus, jumbo frames - 12MB/s
        > 1000mbps ethernet off PCI bus, jumbo frames - 13MB/s

        wow, that sucks, I would have expected more like 70MB/s with =
gigabit.

        Geo.


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All I know is if I switch from 10baseT =
to 100baseT=20
I see approx a 10x speed increase, so I would expect gigabit to provide = that=20
same kind of speed increase over 100baseT even without jumbo frames. If = it=20
doesn't  because of your "other factors" then they had
no business = calling=20
it gigabit did they? <g> From what I'm seeing it should have
been=20 200baseT..
 
Geo.

  "Rich" <{at}> wrote in message news:4291535e{at}w3.nls.net...
     Gigabit
helps with =
throughput but=20
  not with other factors like latency or interrupt =
overhead.
   
     The
increase mike =
described from=20
  jumbo frames is smaller than I would expect.  It could be his=20
  configuration.
   
  Rich
   
   
  

    "Geo" <georger{at}nls.net>=20">mailto:georger{at}nls.net">georger{at}nls.net>=20
    wrote in message news:42914c5e$1{at}w3.nls.net...
    Well without any tuning of
any kind =
here I get=20
    7MB/s copying a 357MB file from my laptop to my server on 100baseT, =
so going=20
    to 1000baseT I would expect a 10x speed improvement.
     
    You guys aren't getting anywhere =
near that kind=20
    of thruput so it's obvious to me that both you guys have a serious=20
    bottleneck somewhere. Personally my guess would be disk =
speed.
     
    Geo.
    

      "Rich" <{at}> wrote in message news:4290f134$1{at}w3.nls.net...
        
Mike's setup may =
have other=20
      factors that hurt it.  Maybe it's his network adapters, poor =
drivers,=20
      or the operating system tcpop implementation.  He should =
probably=20
      provide those details.
       
         At
my home without =
jumbo frames=20
      using a 32-bit PCI adapter on a desktop talking to a laptop with a =
PCI-E=20
      chipset I see 17 MB/s.  I can't try jumbo frames because my =
switch=20
      doesn't support them.  Between two 32-bit PCI desktops I only =
get=20
      16-1/4 MB/s.
       
      Rich
       
      
        "Geo" <georger{at}nls.net>=20">mailto:georger{at}nls.net">georger{at}nls.net>=20
        wrote in message news:42909241{at}w3.nls.net..."M=
ike=20
        '/m'" <mike{at}barkto.com>">mailto:mike{at}barkto.com">mike{at}barkto.com>
wrote=20
        in messagenews:2t1191dc52g=
qb7iqic14bo0iv8mp82ov9u{at}4ax.com...>=20
        100mbps ethernet - 7-8MB/s throughput> 1000mbps ethernet =
on PCI=20
        bus, regular frames - 10MB/s> 1000mbps ethernet on PCI =
bus, jumbo=20
        frames - 12MB/s> 1000mbps ethernet off PCI bus, jumbo =
frames -=20
        13MB/swow, that sucks, I would have expected more like =
70MB/s=20
        with=20
gigabit.Geo.

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