ndt-users list created

[Richard Carlson <>]

Hi Clay;

I don't have a good answer at this time.  I've been working with a 2.6.16 
kernel, and I see serious problems with data streaming into the 
server.  The NDT code reports a non-zero loss rate and the achieved 
throughput is what I should expect with that loss rate.  What isn't clear 
is where the loss is occurring.  Hopefully I can spend some time on this in 
the near future.

Two other points.
1) looking at the e100.c source code I found this code around line 1255
        "/* if you wish to disable the ucode functionality, while 
maintaining the
          * workarounds it provides, set the following defines to:
          * BUNDLESMALL 0
          * BUNDLEMAX 1
          * INTDELAY 1
          */
        #define BUNDLESMALL 1
        #define BUNDLEMAX (u16)6
        #define INTDELAY (u16)1536 /* 0x600  */"

Turning off this ucode functionality seems to solve the problems I've seen 
with this card.  So instead of replacing the e100.c source I edit the 
existing file and change the defines.  Not a pretty solution, but it works.

2) I don't have a good solution for the e1000 NIC.  I need to find a test 
machine with the NIC.  One thing I'd like to try is to "enable" the RX 
polling (NAPI) option.  Most of my configs leave this option 
disabled.  Maybe enabling it will make things better.

If anyone else has any comments or experiences please share them with this 
list.

Rich
At 02:19 PM 6/20/2006, Clayton Keller wrote:
> We have been running on th 2.6.12.5 kernel for some time now. Mostly due
> in part to issues we were seeing when bumping the Kernel to a newer
> version, at the time, Richard, you had pointed out that there may be an
> issue with the NIC drivers with the Kernel.
>
> I have seen posts recently where you are taking the 2.6.12.x kernel
> drivers for the NIC and overwriting those in the newer kernels. Are you
> still suggesting this, or are the newer kernels not showing the same
> types of issues.
>
> Clay

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Richard A. Carlson                              e-mail: 

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