QoS Packet Scheduler

[Ragde]

Hello all. I read somewhere by disabling/uninstalling the QoS Packet Scheduler service under Network Connections would improve performance. Is this true? Thanks in advance.

[+s55 Subscriber¹]

It may but it wont make much if any difference.

Certainly nothing noticeable.

I can maxout the 100mbit segment of my network with it enabled.

It may lower CPU usage slightly. Not really sure tbh

[ScottKin]

  whizkid25 said:

Hello all. I read somewhere by disabling/uninstalling the QoS Packet Scheduler service under Network Connections would improve performance. Is this true? Thanks in advance.

That totally depends on if you're needing any Quality of Service (QoS) guarantees on your network or your connection to the Internet.

If all you're doing is passing files and normal Internet data that can be easily re-assembled at your end, then QoS is probably not needed and you could possibly see improvement if you disable it; however, if you're using any kind of Video, VoIP or H.232 communciations (Skype, Videoconferencing, VideoChat using Yahoo!Messenger or MSN Messenger), QoS can be quite helpfull - it schedules packets according to their precise order for those kinds of protocols where packet delivery in chronographic order is needed or demanded.

So, it's dependent on what you're doing. Test it for yourself - the results might suprise you!

--ScottKin

[+allan MVC]

From an original post by a staff member on my site:

There have been claims in various published technical articles and newsgroup postings that Windows XP always reserves 20 percent of the available bandwidth for QoS. These claims are incorrect. The information in the "Clarification about QoS in End Computers That Are Running Windows XP" section of this article correctly describes the behavior of Windows XP systems.

Clarification about QoS in End Computers That Are Running Windows XP

As in Windows 2000, programs can leverage QoS through the QoS application programming interfaces (APIs) in Windows XP. One hundred percent of the network bandwidth is available to be shared by all programs unless a program specifically requests priority bandwidth. This "reserved" bandwidth is still available to other programs unless the requesting program is sending data. By default, programs can reserve up to an aggregate bandwidth of 20 percent of the underlying link speed on each interface on an end computer. If the program that reserved the bandwidth is not sending enough data to utilize it completely, the unused portion of the reserved bandwidth is available for other data flows on the same host.

For more information about the QoS packet scheduler, refer to Windows XP Help. Additional information about Windows 2000 QoS is available in the Windows 2000 technical library.

There really is no need to disable or remove this. You are not going to see any performance drop.