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From: David Marchand <david.marchand@redhat.com>
To: Stephen Hemminger <stephen@networkplumber.org>
Cc: dev <dev@dpdk.org>, Thomas Monjalon <thomas@monjalon.net>,
	 "Yigit, Ferruh" <ferruh.yigit@intel.com>,
	Wenzhuo Lu <wenzhuo.lu@intel.com>,
	 Jingjing Wu <jingjing.wu@intel.com>,
	Bernard Iremonger <bernard.iremonger@intel.com>
Subject: Re: [dpdk-dev] [PATCH] app/testpmd: reduce memory consumption
Date: Thu, 21 Nov 2019 21:32:22 +0100
Message-ID: <CAJFAV8z_8VwyNC_ORoqn0hrDR0DLLKODSTzw3HBAVsxs8DcVNw@mail.gmail.com> (raw)
In-Reply-To: <20191121084518.488dc568@hermes.lan>

On Thu, Nov 21, 2019 at 5:45 PM Stephen Hemminger
<stephen@networkplumber.org> wrote:
>
> On Thu, 21 Nov 2019 16:12:55 +0100
> David Marchand <david.marchand@redhat.com> wrote:
>
> > -     uint16_t                nb_rx_desc[MAX_QUEUE_ID+1]; /**< per queue rx desc number */
> > -     uint16_t                nb_tx_desc[MAX_QUEUE_ID+1]; /**< per queue tx desc number */
> > -     struct rte_eth_rxconf   rx_conf[MAX_QUEUE_ID+1]; /**< per queue rx configuration */
> > -     struct rte_eth_txconf   tx_conf[MAX_QUEUE_ID+1]; /**< per queue tx configuration */
> > +     uint16_t                nb_rx_desc[RTE_MAX_QUEUES_PER_PORT+1]; /**< per queue rx desc number */
> > +     uint16_t                nb_tx_desc[RTE_MAX_QUEUES_PER_PORT+1]; /**< per queue tx desc number */
> > +     struct rte_eth_rxconf   rx_conf[RTE_MAX_QUEUES_PER_PORT+1]; /**< per queue rx configuration */
> > +     struct rte_eth_txconf   tx_conf[RTE_MAX_QUEUES_PER_PORT+1]; /**< per queue tx configuration */
>
> Why not  put all the per-queue stuff together in one structure
> and put it at the end. Then dynamically size based on number of queues?

This is something that could be done.
At first glance, the code is relying on those arrays being contiguous,
but it should not be a problem.
The reason for the size '+1' is not obvious to me.
Not saying that would be difficult to investigate and fix/rework all this.

My approach seems the quickest and less risky after rc3.
I can look at this post 19.11 (but volunteers are welcome, testpmd
needs some love).


-- 
David Marchand


  reply index

Thread overview: 20+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-11-21 15:12 David Marchand
2019-11-21 15:36 ` Ferruh Yigit
2019-11-21 16:17   ` David Marchand
2019-11-21 16:23     ` David Marchand
2019-11-21 21:22       ` Thomas Monjalon
2019-11-21 16:45 ` Stephen Hemminger
2019-11-21 20:32   ` David Marchand [this message]
2019-11-21 21:25 ` Thomas Monjalon
2019-11-21 21:55   ` Thomas Monjalon
2019-11-22 10:43 ` [dpdk-dev] [PATCH v2] " David Marchand
2019-11-22 12:24   ` Ferruh Yigit
2019-11-22 13:12     ` Thomas Monjalon
2019-11-22 13:14       ` Ferruh Yigit
2019-11-22 13:48         ` [dpdk-dev] [PATCH] devtools: disable automatic probing in null testing Thomas Monjalon
2019-11-22 13:56           ` Ferruh Yigit
2019-11-22 15:56             ` David Marchand
2019-11-24 22:52               ` Thomas Monjalon
2019-11-22 14:03           ` Gaëtan Rivet
2019-11-22 14:36             ` Thomas Monjalon
2019-11-22 14:14   ` [dpdk-dev] [PATCH v2] app/testpmd: reduce memory consumption Ferruh Yigit

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