From: "Burakov, Anatoly" <anatoly.burakov@intel.com>
To: jerinj@marvell.com, dev@dpdk.org,
John McNamara <john.mcnamara@intel.com>,
Marko Kovacevic <marko.kovacevic@intel.com>
Cc: thomas@monjalon.net, david.marchand@redhat.com
Subject: Re: [dpdk-dev] [PATCH v2 4/4] eal: select IOVA mode as VA for default case
Date: Tue, 16 Jul 2019 15:33:29 +0100 [thread overview]
Message-ID: <1e271468-6aa1-d81c-8bbf-ee5be41ffa99@intel.com> (raw)
In-Reply-To: <20190716134609.40930-5-jerinj@marvell.com>
On 16-Jul-19 2:46 PM, jerinj@marvell.com wrote:
> From: Jerin Jacob <jerinj@marvell.com>
>
> When bus layer selected the preferred mode as RTE_IOVA_DC then
> select the IOVA mode as RTE_IOVA_VA.
>
> The RTE_IOVA_VA selected as the default because,
>
> 1) All drivers work in RTE_IOVA_VA mode, irrespective of physical
> address availability.
>
> 2) By default, the mempool, first asks for IOVA-contiguous memory
> using RTE_MEMZONE_IOVA_CONTIG and this is slow in IOVA as PA mode
> and it may affect the application boot time.
>
> Signed-off-by: Jerin Jacob <jerinj@marvell.com>
> ---
I should celebrate now :D
> doc/guides/prog_guide/env_abstraction_layer.rst | 10 ++++++++--
> lib/librte_eal/linux/eal/eal.c | 6 ++----
> 2 files changed, 10 insertions(+), 6 deletions(-)
>
> diff --git a/doc/guides/prog_guide/env_abstraction_layer.rst b/doc/guides/prog_guide/env_abstraction_layer.rst
> index 77307e3a6..1b0343eee 100644
> --- a/doc/guides/prog_guide/env_abstraction_layer.rst
> +++ b/doc/guides/prog_guide/env_abstraction_layer.rst
> @@ -445,8 +445,14 @@ kernels.
> - if the preferred mode is RTE_IOVA_PA but there is no access to Physical
> Addresses, then EAL init will fail early, since later probing of the devices
> would fail anyway,
> -- if the preferred mode is RTE_IOVA_DC then based on the Physical Addresses
> - availability, the preferred mode is adjusted to RTE_IOVA_PA or RTE_IOVA_VA.
> +- if the preferred mode is RTE_IOVA_DC then select the IOVA mode as RTE_IOVA_VA.
> + The RTE_IOVA_VA selected as the default because,
> +
> +#. All drivers work in RTE_IOVA_VA mode, irrespective of physical address availability.
Is there anywhere we can document that any new driver must support both
before being accepted?
> +
> +#. By default, the mempool, first asks for IOVA-contiguous memory using ``RTE_MEMZONE_IOVA_CONTIG``,
> + and this is slow in IOVA as PA mode and it may affect the application boot time.
I would also add a point about usability improvement for use-cases which
require large amounts of IOVA-contiguous memory.
Otherwise,
Acked-by: Anatoly Burakov <anatoly.burakov@intel.com>
--
Thanks,
Anatoly
next prev parent reply other threads:[~2019-07-16 14:33 UTC|newest]
Thread overview: 57+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-07-10 21:48 [dpdk-dev] [PATCH 0/2] Fixes on IOVA mode selection David Marchand
2019-07-10 21:48 ` [dpdk-dev] [PATCH 1/2] Revert "bus/pci: add Mellanox kernel driver type" David Marchand
2019-07-16 10:37 ` [dpdk-dev] [EXT] " Jerin Jacob Kollanukkaran
2019-07-10 21:48 ` [dpdk-dev] [PATCH 2/2] eal: fix IOVA mode selection as VA for pci drivers David Marchand
2019-07-11 14:40 ` Thomas Monjalon
2019-07-12 8:05 ` Jerin Jacob Kollanukkaran
2019-07-12 11:03 ` Burakov, Anatoly
2019-07-12 12:43 ` Thomas Monjalon
2019-07-12 12:58 ` Burakov, Anatoly
2019-07-12 13:19 ` Bruce Richardson
2019-07-15 14:26 ` Jerin Jacob Kollanukkaran
2019-07-15 15:03 ` Thomas Monjalon
2019-07-15 15:35 ` Jerin Jacob Kollanukkaran
2019-07-15 16:06 ` Thomas Monjalon
2019-07-15 16:27 ` Jerin Jacob Kollanukkaran
2019-07-16 13:46 ` [dpdk-dev] [PATCH v2 0/4] Fixes on IOVA mode selection jerinj
2019-07-16 13:46 ` [dpdk-dev] [PATCH v2 1/4] Revert "bus/pci: add Mellanox kernel driver type" jerinj
2019-07-16 13:46 ` [dpdk-dev] [PATCH v2 2/4] eal: fix IOVA mode selection as VA for pci drivers jerinj
2019-07-16 14:26 ` Burakov, Anatoly
2019-07-16 15:07 ` Jerin Jacob Kollanukkaran
2019-07-16 13:46 ` [dpdk-dev] [PATCH v2 3/4] eal: change RTE_PCI_DRV_IOVA_AS_VA flag name jerinj
2019-07-16 13:46 ` [dpdk-dev] [PATCH v2 4/4] eal: select IOVA mode as VA for default case jerinj
2019-07-16 14:33 ` Burakov, Anatoly [this message]
2019-07-17 8:33 ` [dpdk-dev] [EXT] " Jerin Jacob Kollanukkaran
2019-07-17 12:38 ` Burakov, Anatoly
2019-07-17 14:04 ` Jerin Jacob Kollanukkaran
2019-07-18 6:45 ` [dpdk-dev] [PATCH v3 0/4] Fixes on IOVA mode selection jerinj
2019-07-18 6:45 ` [dpdk-dev] [PATCH v3 1/4] Revert "bus/pci: add Mellanox kernel driver type" jerinj
2019-07-18 6:45 ` [dpdk-dev] [PATCH v3 2/4] eal: fix IOVA mode selection as VA for pci drivers jerinj
2019-07-18 6:45 ` [dpdk-dev] [PATCH v3 3/4] eal: change RTE_PCI_DRV_IOVA_AS_VA flag name jerinj
2019-07-18 6:45 ` [dpdk-dev] [PATCH v3 4/4] eal: select IOVA mode as VA for default case jerinj
2019-07-22 11:28 ` [dpdk-dev] [PATCH v3 0/4] Fixes on IOVA mode selection David Marchand
2019-07-22 12:56 ` [dpdk-dev] [PATCH v4 " David Marchand
2019-07-22 12:56 ` [dpdk-dev] [PATCH v4 1/4] Revert "bus/pci: add Mellanox kernel driver type" David Marchand
2019-07-22 12:56 ` [dpdk-dev] [PATCH v4 2/4] eal: fix IOVA mode selection as VA for PCI drivers David Marchand
2019-11-25 9:33 ` Ferruh Yigit
2019-11-25 10:22 ` Thomas Monjalon
2019-11-25 12:03 ` Ferruh Yigit
2019-11-25 12:36 ` David Marchand
2019-11-25 12:58 ` Burakov, Anatoly
2019-11-25 14:29 ` Thomas Monjalon
2019-11-25 11:07 ` Jerin Jacob
2019-07-22 12:56 ` [dpdk-dev] [PATCH v4 3/4] drivers: change IOVA as VA PCI flag name David Marchand
2019-07-22 12:56 ` [dpdk-dev] [PATCH v4 4/4] eal: select IOVA as VA mode for default case David Marchand
2019-07-22 15:53 ` [dpdk-dev] [PATCH v4 0/4] Fixes on IOVA mode selection Thomas Monjalon
2019-07-23 3:35 ` Stojaczyk, Dariusz
2019-07-23 4:18 ` Jerin Jacob Kollanukkaran
2019-07-23 4:54 ` Stojaczyk, Dariusz
2019-07-23 5:27 ` Jerin Jacob Kollanukkaran
2019-07-23 7:21 ` Thomas Monjalon
2019-07-23 9:57 ` Burakov, Anatoly
2019-07-23 10:25 ` Thomas Monjalon
2019-07-23 13:56 ` Burakov, Anatoly
2019-07-23 14:24 ` [dpdk-dev] [EXT] " Jerin Jacob Kollanukkaran
2019-07-23 14:29 ` [dpdk-dev] " Burakov, Anatoly
2019-07-23 14:36 ` [dpdk-dev] [EXT] " Jerin Jacob Kollanukkaran
2019-07-23 15:47 ` Burakov, Anatoly
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