Best Kernel QoS Parameters
Dear Michelle
Even when you choose your shaper, you need to use the "granularity" of kernel to more exact QoS.
The preferences that I know is
1) Preemptible Kernel
2) Tickless System
3) 1000 HZ Kernel
With these parameters on, the shaper precision is very, very increased. But I think that have another parameters that improve more the speed.
Un saluto a tutti italian.
I'm italian descendent. My father was bird in Napole and bring from Brazil very young.
Cheers.
Michele Petrazzo - Unipex escreveu:
Quoted 26 lines
Quoted 2 lines · Lucas Willian Bocchi
Hello all!
Hi,
Quoted 2 lines
My question is simple: to a linux router, how are the kernel parameters (2.6 kernel tree) to set to make a good and responsive kernel to best QoS Shaping (HTB, HFSC, etc)?
From my point of view, into a normal environment, the last problem is which packet scheduler choose. All those are so well builds that when your setup don't work like you want, the right question must be "where I'm wrong?" and not "can be the shaper wrong or there is a bug inside?"
For me, for a newbie, the right one are htb. Simple and with a good documentation / cookbook.
Quoted 1 line
Another question is: how are the effect of TX and RX Ring Buffer (hardware packet buffer) in QoS? The algoritms use these parameters in the QoS configuration? I presume that this parameters can affect the performance, because the hardware buffer can borrow the QoS configuration.
I haven't read the sources and I'm not a kernel devel, so I don't know exactly how are the hw buffer use, but I can ensure you that I tried more than one type of ethernet cards into a heavy use systems (google for ml archives) and a good card it's one of the best buys that you can do
Michele