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From: Leon Romanovsky <leon-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>
To: "Hefty, Sean" <sean.hefty-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>
Cc: "dledford-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org"
	<dledford-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>,
	"linux-rdma-u79uwXL29TY76Z2rM5mHXA@public.gmane.org"
	<linux-rdma-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>
Subject: Re: [PATCH rdma-next 0/4] Add packet pacing support for IB verbs
Date: Wed, 9 Nov 2016 08:40:09 +0200	[thread overview]
Message-ID: <20161109064009.GE27883@leon.nu> (raw)
In-Reply-To: <1828884A29C6694DAF28B7E6B8A82373AB0A7B31-P5GAC/sN6hkd3b2yrw5b5LfspsVTdybXVpNB7YpNyf8@public.gmane.org>

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On Tue, Nov 08, 2016 at 05:49:26PM +0000, Hefty, Sean wrote:
> > When sending from a 10G host to a 1G host, it is easy to overrun the
> > receiver,
> > leading to packet loss and traffic backing off. Similar problems occur
> > when
> > a 10G host sends data to a sub-10G virtual circuit, or a 40G host
> > sending
> > to a 10G host. Packet pacing could control packet injection rate and
> > reduces
> > network congestion to maximize throughput & minimize network latency.
>
> Why isn't the path record data and existing mechanisms sufficient to handle this?
>

Packet pacing allows different combinations of traffic shaping: per-CPU,
per-flow and their combinations with better and steady QoS requirements
without involving subnet management.

Thanks

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  parent reply	other threads:[~2016-11-09  6:40 UTC|newest]

Thread overview: 17+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2016-10-31 10:21 [PATCH rdma-next 0/4] Add packet pacing support for IB verbs Leon Romanovsky
     [not found] ` <1477909297-14491-1-git-send-email-leon-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>
2016-10-31 10:21   ` [PATCH rdma-next 1/4] IB/mlx5: Report mlx5 packet pacing capabilities when querying device Leon Romanovsky
2016-10-31 10:21   ` [PATCH rdma-next 2/4] IB/core: Support rate limit for packet pacing Leon Romanovsky
     [not found]     ` <1477909297-14491-3-git-send-email-leon-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>
2016-11-01 10:06       ` Yuval Shaia
     [not found]         ` <20161101100607.GB3727-Hxa29pjIrETlQW142y8m19+IiqhCXseY@public.gmane.org>
2016-11-02 15:35           ` Leon Romanovsky
2016-11-09 17:27       ` Hefty, Sean
     [not found]         ` <1828884A29C6694DAF28B7E6B8A82373AB0A7F70-P5GAC/sN6hkd3b2yrw5b5LfspsVTdybXVpNB7YpNyf8@public.gmane.org>
2016-11-09 21:00           ` Bodong Wang
2016-10-31 10:21   ` [PATCH rdma-next 3/4] IB/uverbs: Extend modify_qp and support " Leon Romanovsky
2016-10-31 10:21   ` [PATCH rdma-next 4/4] IB/mlx5: Update the rate limit according to user setting for RAW QP Leon Romanovsky
2016-11-08 17:49   ` [PATCH rdma-next 0/4] Add packet pacing support for IB verbs Hefty, Sean
     [not found]     ` <1828884A29C6694DAF28B7E6B8A82373AB0A7B31-P5GAC/sN6hkd3b2yrw5b5LfspsVTdybXVpNB7YpNyf8@public.gmane.org>
2016-11-09  6:40       ` Leon Romanovsky [this message]
     [not found]         ` <20161109064009.GE27883-2ukJVAZIZ/Y@public.gmane.org>
2016-11-09 17:06           ` Hefty, Sean
     [not found]             ` <1828884A29C6694DAF28B7E6B8A82373AB0A7F0A-P5GAC/sN6hkd3b2yrw5b5LfspsVTdybXVpNB7YpNyf8@public.gmane.org>
2016-11-10  7:22               ` Leon Romanovsky
     [not found]                 ` <20161110072242.GC28957-2ukJVAZIZ/Y@public.gmane.org>
2016-11-10 16:07                   ` Bodong Wang
2016-11-10 16:47                   ` Jason Gunthorpe
     [not found]                     ` <CAFo2czDeGUrA8yYAJ0r5-8q5T=Y=gZojjfHrLqxribZaexmbOA@mail.gmail.com>
     [not found]                       ` <HE1PR0501MB27291D7FD8782D6650C57E5ACABF0@HE1PR0501MB2729.eurprd05.prod.outlook.com>
     [not found]                         ` <DB5PR0501MB19281A8064B283BE35EDE821B0BF0@DB5PR0501MB1928.eurprd05.prod.outlook.com>
     [not found]                           ` <DB5PR0501MB19281A8064B283BE35EDE821B0BF0-1FH/Iesddo5/SeJcUcAJq8DSnupUy6xnnBOFsp37pqbUKgpGm//BTAC/G2K4zDHf@public.gmane.org>
2016-11-15 14:43                             ` Rony Efraim
2016-11-17 18:15   ` Leon Romanovsky

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