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From: Morten Brørup <mb@smartsharesystems.com>
To: "Liguzinski, WojciechX" <wojciechx.liguzinski@intel.com>,
	<dev@dpdk.org>, <jasvinder.singh@intel.com>,
	<cristian.dumitrescu@intel.com>
Cc: <savinay.dharmappa@intel.com>
Subject: Re: [dpdk-dev] [RFC PATCH 0/3] Add PIE support for HQoS library
Date: Tue, 25 May 2021 10:56:58 +0200
Message-ID: <98CBD80474FA8B44BF855DF32C47DC35C617C2@smartserver.smartshare.dk> (raw)
In-Reply-To: <20210524105822.63171-1-wojciechx.liguzinski@intel.com>

> From: dev [mailto:dev-bounces@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


  parent reply	other threads:[~2021-05-25  8:57 UTC|newest]

Thread overview: 32+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-05-24 10:58 Liguzinski, WojciechX
2021-05-24 10:58 ` [dpdk-dev] [RFC PATCH 1/3] sched: add pie based congestion management Liguzinski, WojciechX
2021-05-25  9:16   ` Morten Brørup
2021-06-09  8:36     ` Liguzinski, WojciechX
2021-06-09 12:35       ` Morten Brørup
2021-05-24 10:58 ` [dpdk-dev] [RFC PATCH 2/3] example/qos_sched: add pie support Liguzinski, WojciechX
2021-05-24 10:58 ` [dpdk-dev] [RFC PATCH 3/3] example/ip_pipeline: " Liguzinski, WojciechX
2021-05-24 16:19 ` [dpdk-dev] [RFC PATCH 0/3] Add PIE support for HQoS library Stephen Hemminger
2021-05-25  8:56 ` Morten Brørup [this message]
2021-06-07 13:01   ` Liguzinski, WojciechX
2021-06-09 10:53 ` [dpdk-dev] [RFC PATCH v1 " Liguzinski, WojciechX
2021-06-09 10:53   ` [dpdk-dev] [RFC PATCH v1 1/3] sched: add PIE based congestion management Liguzinski, WojciechX
2021-06-09 10:53   ` [dpdk-dev] [RFC PATCH v1 2/3] example/qos_sched: add PIE support Liguzinski, WojciechX
2021-06-09 10:53   ` [dpdk-dev] [RFC PATCH v1 3/3] example/ip_pipeline: " Liguzinski, WojciechX
2021-06-15  9:01   ` [dpdk-dev] [RFC PATCH v2 0/3] Add PIE support for HQoS library Liguzinski, WojciechX
2021-06-15  9:01     ` [dpdk-dev] [RFC PATCH v2 1/3] sched: add PIE based congestion management Liguzinski, WojciechX
2021-06-15  9:01     ` [dpdk-dev] [RFC PATCH v2 2/3] example/qos_sched: add PIE support Liguzinski, WojciechX
2021-06-15 12:23       ` Morten Brørup
2021-06-15  9:02     ` [dpdk-dev] [RFC PATCH v2 3/3] example/ip_pipeline: " Liguzinski, WojciechX
2021-06-21  7:35     ` [dpdk-dev] [RFC PATCH v3 0/3] Add PIE support for HQoS library Liguzinski, WojciechX
2021-06-21  7:35       ` [dpdk-dev] [RFC PATCH v3 1/3] sched: add PIE based congestion management Liguzinski, WojciechX
2021-06-21 18:17         ` Stephen Hemminger
2021-06-22  7:39           ` Liguzinski, WojciechX
2021-06-21  7:35       ` [dpdk-dev] [RFC PATCH v3 2/3] example/qos_sched: add PIE support Liguzinski, WojciechX
2021-06-21  7:35       ` [dpdk-dev] [RFC PATCH v3 3/3] example/ip_pipeline: " Liguzinski, WojciechX
2021-07-05  8:04       ` [dpdk-dev] [RFC PATCH v4 0/3] Add PIE support for HQoS library Liguzinski, WojciechX
2021-07-05  8:04         ` [dpdk-dev] [RFC PATCH v4 1/3] sched: add PIE based congestion management Liguzinski, WojciechX
2021-07-16 13:20           ` Dumitrescu, Cristian
2021-07-16 15:11           ` Dumitrescu, Cristian
2021-07-05  8:04         ` [dpdk-dev] [RFC PATCH v4 2/3] example/qos_sched: add pie support Liguzinski, WojciechX
2021-07-05  8:04         ` [dpdk-dev] [RFC PATCH v3 3/3] example/ip_pipeline: add PIE support Liguzinski, WojciechX
2021-07-16 12:46         ` [dpdk-dev] [RFC PATCH v4 0/3] Add PIE support for HQoS library Dumitrescu, Cristian

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