Really weird gigabit throughput..

S

Skud

Gawd
Joined
Sep 4, 2002
Messages
587
I have this really weird throughput issue between two systems. Here are the specs:

Source (Workstation):
Q9300
Raptor 74GB
Seagate 7200.10 250GB
WD 640GB
8GB RAM
Asus P5E w/ Marvell "Yukon" GbE
Vista Ultimate x64 SP2 beta

Desintation (Server):
Dual Opteron 275
6GB RAM
Iwill DK88 w/Broadcom GbE
5 x 500GB WD RE2 in RAID5 on a PERC5 sas with BBU
Server 2003 Std. x64

When I "send" a file from the various drives on the workstation to the server Vista reports the following throughput

Seagate 250GB
============
55 - 62MB/s and task manager shows a link utilization of 100%.

WD 640GB
=========
75 - 80MB/s and task manager shows a link utilization of 100%.

WD 74GB Raptor
=============
63 - 67MB/s and task manager shows a link utilization of 100%.

On the server, during the same transfer, it shows the same throughput but only 50% or so utilization. This would seem to be the correct.

Looks like Vista is reporting the throughput as 100% no matter what. This happen to anyone else? 100% utilization should only happen around 120MB/s on a gigabit link correct?

Thanks!!
Riley
 
Vista has had a bug in the networking throughput display since beta -- in some cases, it shows double the throughput, which is capped at 100%. This might have something to do with specific device/driver interactions, as it doesn't always happen. It shows up both in the Task Manager / Networking and PerfMon, and so may also be reported by various third-party utilities which monitor and display throughput at the network level.
 
Madwand said:
Vista has had a bug in the networking throughput display since beta -- in some cases, it shows double the throughput, which is capped at 100%. This might have something to do with specific device/driver interactions, as it doesn't always happen. It shows up both in the Task Manager / Networking and PerfMon, and so may also be reported by various third-party utilities which monitor and display throughput at the network level.
Click to expand...

Didn't that problem get fixed in service pack 1? I believe it was addressed, at least for the 64bit versions.
 
Well, for starters, make sure you have your latest network drivers and enable jumbo frames if your equipment supports them.
 
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