> From: dev [mailto:dev-boun...@dpdk.org] On Behalf Of Liguzinski, > WojciechX > Sent: Monday, 24 May 2021 12.58 > > DPDK sched library is equipped with mechanism that secures it from the > bufferbloat problem > which is a situation when excess buffers in the network cause high > latency and latency > variation. Currently, it supports RED for queue congestion control
The correct term is "active queue management", not "queue congestion control". > (which is designed > to control the queue length but it does not control latency directly > and is now being > obsoleted ). Some might prefer other algorithms, such as PIE, CoDel, CAKE, etc., but RED is not obsolete! > However, more advanced queue management is required to > address this problem > and provide desirable quality of service to users. > > This solution (RFC) proposes usage of new algorithm called "PIE" > (Proportional Integral > controller Enhanced) that can effectively and directly control queuing > latency to address > the bufferbloat problem. > > The implementation of mentioned functionality includes modification of > existing and > adding a new set of data structures to the library, adding PIE related > APIs. > This affects structures in public API/ABI. That is why deprecation > notice is going > to be prepared and sent. > > > Liguzinski, WojciechX (3): > sched: add pie based congestion management > example/qos_sched: add pie support > example/ip_pipeline: add pie support It's "PIE", not "pie". :-) Nonetheless, the RFC looks good! -Morten
