[dpdk-dev] [RFC] ethdev: add tail drop API for traffic management

Dumitrescu, Cristian cristian.dumitrescu at intel.com
Thu Aug 16 10:54:55 CEST 2018



> -----Original Message-----
> From: Xu, Rosen
> Sent: Tuesday, August 14, 2018 7:45 AM
> To: Jerin Jacob <jerin.jacob at caviumnetworks.com>
> Cc: dev at dpdk.org; Dumitrescu, Cristian <cristian.dumitrescu at intel.com>;
> Lu, Wenzhuo <wenzhuo.lu at intel.com>; Singh, Jasvinder
> <jasvinder.singh at intel.com>; Yigit, Ferruh <ferruh.yigit at intel.com>;
> nithin.dabilpuram at cavium.com
> Subject: RE: [dpdk-dev] [RFC] ethdev: add tail drop API for traffic
> management
> 
> 
> 
> > -----Original Message-----
> > From: Jerin Jacob [mailto:jerin.jacob at caviumnetworks.com]
> > Sent: Tuesday, August 14, 2018 14:06
> > To: Xu, Rosen <rosen.xu at intel.com>
> > Cc: dev at dpdk.org; Dumitrescu, Cristian <cristian.dumitrescu at intel.com>;
> Lu,
> > Wenzhuo <wenzhuo.lu at intel.com>; Singh, Jasvinder
> > <jasvinder.singh at intel.com>; Yigit, Ferruh <ferruh.yigit at intel.com>;
> > nithin.dabilpuram at cavium.com
> > Subject: Re: [dpdk-dev] [RFC] ethdev: add tail drop API for traffic
> > management
> >
> > -----Original Message-----
> > > Date: Mon, 13 Aug 2018 15:53:32 +0800
> > > From: Rosen Xu <rosen.xu at intel.com>
> > > To: dev at dpdk.org
> > > CC: cristian.dumitrescu at intel.com, wenzhuo.lu at intel.com,
> > > jasvinder.singh at intel.com, rosen.xu at intel.com, ferruh.yigit at intel.com
> > > Subject: [dpdk-dev] [RFC] ethdev: add tail drop API for traffic
> > > management
> > > X-Mailer: git-send-email 1.8.3.1
> > >
> > >
> > > This patch introduces new ethdev generic Tail Drop API for Traffic
> > > Management, which is yet another standard congestion management
> > > offload for Ethernet devices.
> > >
> > > Tail Drop is about packets dropping when they arrive on a congested
> > > interface buffer. It's one mode of congestion management for hierarchy
> > > leaf nodes.
> > >
> > > There are two configuration parameters for Tail Drop:
> > > 1. Buffer Depth: determine the depth of receive fifo for packet RX.
> >

This scheme is a sort of WRED-lite, so Rosen and I decided to look at fitting the driver he's currently working on under the WRED scheme; we can take another look at this if any significant issues are to be found (unlikely).

Regards,
Cristian


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