[Bug 546649] [NEW] Slow throughput when communicating with windows

[Paul Larson]

Private bug reported:

A problem was recently discovered with the Karmic kernel for imx51,
where slow network throughput is observed when downloading from a
windows system.  The following tests were performed with the karmic
kernel that should be going into proposed shortly.

Now that we understand the problem better, I'm retesting and getting
some mixed results.

Test 1:
 Server: http://v.imwx.com/v/wxflash/100318teenrescue.flv
 Client: x86 linux
 342 KB/s

 Server: http://v.imwx.com/v/wxflash/100318teenrescue.flv
 Client: imx51 karmic+neon enabled kernel
 339 KB/s

 This is similar enough to call it even, and MUCH better results than
what they were reporting when downloading from that site.

Test 2:
 Server: local windows box/100318teenrescue.flv (http IIS)
 Client: x86 linux
 10.9 MB/s

 Server: local windows box/100318teenrescue.flv (http IIS)
 Client: imx51 karmic+neon enabled kernel
 91.0 KB/s

 This is consistent with the throughput reported by Adobe.

Test 3:
 Server: local windows box/100318teenrescue.flv (FTP Xlight)
 Client: x86 linux
 11242.8 kB/s

 Server: local windows box/100318teenrescue.flv (FTP Xlight)
 Client: imx51 karmic+neon enabled kernel
 65.1 kB/s

Test 4:
 Server: x86 Ubuntu (http Apache2)
 Client: imx51 karmic+neon enabled kernel
 6.35 MB/s

No duplicate test here from Linux to Linux here, because the server here
is the same system I was using as a Linux client in the previous tests.

I'm still investigating, but would be very interested if anyone can
reproduce these results.

** Affects: linux-fsl-imx51 (Ubuntu)
     Importance: High
     Assignee: Bryan Wu (cooloney)
         Status: New


** Tags: armel

** Visibility changed to: Private

** Changed in: linux-fsl-imx51 (Ubuntu)
   Importance: Undecided => High

** Changed in: linux-fsl-imx51 (Ubuntu)
     Assignee: (unassigned) => Bryan Wu (cooloney)

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Slow throughput when communicating with windows
https://bugs.launchpad.net/bugs/546649
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