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From: "Kinsella, Ray" <mdr@ashroe.eu>
To: "Ananyev, Konstantin" <konstantin.ananyev@intel.com>,
	David Marchand <david.marchand@redhat.com>
Cc: dev <dev@dpdk.org>,
	Jerin Jacob Kollanukkaran <jerinj@marvell.com>,
	"Ruifeng Wang (Arm Technology China)" <ruifeng.wang@arm.com>,
	"Medvedkin, Vladimir" <vladimir.medvedkin@intel.com>,
	Thomas Monjalon <thomas@monjalon.net>,
	"Richardson, Bruce" <bruce.richardson@intel.com>
Subject: Re: [dpdk-dev] [PATCH v3 00/14] acl: introduce AVX512 classify methods
Date: Wed, 14 Oct 2020 10:23:15 +0100
Message-ID: <c010c5dd-5a3d-1ad4-1a7a-ab8e80c76658@ashroe.eu> (raw)
In-Reply-To: <BYAPR11MB330112E64D1828F66206FA7F9A0D0@BYAPR11MB3301.namprd11.prod.outlook.com>



On 06/10/2020 17:07, Ananyev, Konstantin wrote:
> 
>>
>> On Mon, Oct 5, 2020 at 9:44 PM Konstantin Ananyev
>> <konstantin.ananyev@intel.com> wrote:
>>>
>>> These patch series introduce support of AVX512 specific classify
>>> implementation for ACL library.
>>> It adds two new algorithms:
>>>  - RTE_ACL_CLASSIFY_AVX512X16 - can process up to 16 flows in parallel.
>>>    It uses 256-bit width instructions/registers only
>>>    (to avoid frequency level change).
>>>    On my SKX box test-acl shows ~15-30% improvement
>>>    (depending on rule-set and input burst size)
>>>    when switching from AVX2 to AVX512X16 classify algorithms.
>>>  - RTE_ACL_CLASSIFY_AVX512X32 - can process up to 32 flows in parallel.
>>>    It uses 512-bit width instructions/registers and provides higher
>>>    performance then AVX512X16, but can cause frequency level change.
>>>    On my SKX box test-acl shows ~50-70% improvement
>>>    (depending on rule-set and input burst size)
>>>    when switching from AVX2 to AVX512X32 classify algorithms.
>>>    ICX and CLX testing showed similar level of speedup.
>>>
>>> Current AVX512 classify implementation is only supported on x86_64.
>>> Note that this series introduce a formal ABI incompatibility
>>
>> The only API change I can see is in rte_acl_classify_alg() new error
>> code but I don't think we need an announcement for this.
>> As for ABI, we are breaking it in this release, so I see no pb.
> 
> Cool, I just wanted to underline that patch #3:
> https://patches.dpdk.org/patch/79786/
> is a formal ABI breakage.

As David said, this is an ABI breaking release - so there is no requirement to maintain compatibility. 

https://doc.dpdk.org/guides/contributing/abi_policy.html

However the following requirements remain:-

* The acknowledgment of the maintainer of the component is mandatory, or if no maintainer is available for the component, the tree/sub-tree maintainer for that component must acknowledge the ABI change instead.
* The acknowledgment of three members of the technical board, as delegates of the technical board acknowledging the need for the ABI change, is also mandatory.

I guess you are the maintainer in this case, so that requirement is satisfied. 

> 
>>
>>
>>> with previous versions of ACL library.
>>>
>>> v2 -> v3:
>>>   Fix checkpatch warnings
>>>   Split AVX512 algorithm into two and deduplicate common code
>>
>> Patch 7 still references a RTE_MACHINE_CPUFLAG flag.
>> Can you rework now that those flags have been dropped?
>>
> 
> Should be fixed in v4:
> https://patches.dpdk.org/project/dpdk/list/?series=12721
> 
> One more thing to mention - this series has a dependency on Vladimir's patch:
> https://patches.dpdk.org/patch/79310/ ("eal/x86: introduce AVX 512-bit type"),
> so CI/travis would still report an error.
> 
> Thanks
> Konstantin
> 

      parent reply index

Thread overview: 70+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-08-07 16:28 [dpdk-dev] [PATCH 20.11 0/7] acl: introduce AVX512 classify method Konstantin Ananyev
2020-08-07 16:28 ` [dpdk-dev] [PATCH 20.11 1/7] acl: fix x86 build when compiler doesn't support AVX2 Konstantin Ananyev
2020-08-07 16:28 ` [dpdk-dev] [PATCH 20.11 2/7] app/acl: few small improvements Konstantin Ananyev
2020-08-07 16:28 ` [dpdk-dev] [PATCH 20.11 3/7] acl: remove of unused enum value Konstantin Ananyev
2020-08-07 16:28 ` [dpdk-dev] [PATCH 20.11 4/7] acl: add infrastructure to support AVX512 classify Konstantin Ananyev
2020-08-07 16:28 ` [dpdk-dev] [PATCH 20.11 5/7] app/acl: add AVX512 classify support Konstantin Ananyev
2020-08-07 16:28 ` [dpdk-dev] [PATCH 20.11 6/7] acl: introduce AVX512 classify implementation Konstantin Ananyev
2020-08-07 16:28 ` [dpdk-dev] [PATCH 20.11 7/7] acl: enhance " Konstantin Ananyev
2020-09-15 16:50 ` [dpdk-dev] [PATCH v2 00/12] acl: introduce AVX512 classify method Konstantin Ananyev
2020-09-15 16:50   ` [dpdk-dev] [PATCH v2 01/12] acl: fix x86 build when compiler doesn't support AVX2 Konstantin Ananyev
2020-09-15 16:50   ` [dpdk-dev] [PATCH v2 02/12] doc: fix mixing classify methods in ACL guide Konstantin Ananyev
2020-09-15 16:50   ` [dpdk-dev] [PATCH v2 03/12] acl: remove of unused enum value Konstantin Ananyev
2020-09-27  3:27     ` Ruifeng Wang
2020-09-15 16:50   ` [dpdk-dev] [PATCH v2 04/12] acl: remove library constructor Konstantin Ananyev
2020-09-15 16:50   ` [dpdk-dev] [PATCH v2 05/12] app/acl: few small improvements Konstantin Ananyev
2020-09-15 16:50   ` [dpdk-dev] [PATCH v2 06/12] test/acl: expand classify test coverage Konstantin Ananyev
2020-09-15 16:50   ` [dpdk-dev] [PATCH v2 07/12] acl: add infrastructure to support AVX512 classify Konstantin Ananyev
2020-09-16  9:11     ` Bruce Richardson
2020-09-16  9:36       ` Medvedkin, Vladimir
2020-09-16  9:49         ` Bruce Richardson
2020-09-16 10:06           ` Ananyev, Konstantin
2020-09-15 16:50   ` [dpdk-dev] [PATCH v2 08/12] acl: introduce AVX512 classify implementation Konstantin Ananyev
2020-09-15 16:50   ` [dpdk-dev] [PATCH v2 09/12] acl: enhance " Konstantin Ananyev
2020-09-15 16:50   ` [dpdk-dev] [PATCH v2 10/12] acl: for AVX512 classify use 4B load whenever possible Konstantin Ananyev
2020-09-15 16:50   ` [dpdk-dev] [PATCH v2 11/12] test/acl: add AVX512 classify support Konstantin Ananyev
2020-09-15 16:50   ` [dpdk-dev] [PATCH v2 12/12] app/acl: " Konstantin Ananyev
2020-10-05 18:45   ` [dpdk-dev] [PATCH v3 00/14] acl: introduce AVX512 classify methods Konstantin Ananyev
2020-10-05 18:45     ` [dpdk-dev] [PATCH v3 01/14] acl: fix x86 build when compiler doesn't support AVX2 Konstantin Ananyev
2020-10-05 18:45     ` [dpdk-dev] [PATCH v3 02/14] doc: fix missing classify methods in ACL guide Konstantin Ananyev
2020-10-05 18:45     ` [dpdk-dev] [PATCH v3 03/14] acl: remove of unused enum value Konstantin Ananyev
2020-10-05 18:45     ` [dpdk-dev] [PATCH v3 04/14] acl: remove library constructor Konstantin Ananyev
2020-10-05 18:45     ` [dpdk-dev] [PATCH v3 05/14] app/acl: few small improvements Konstantin Ananyev
2020-10-05 18:45     ` [dpdk-dev] [PATCH v3 06/14] test/acl: expand classify test coverage Konstantin Ananyev
2020-10-05 18:45     ` [dpdk-dev] [PATCH v3 07/14] acl: add infrastructure to support AVX512 classify Konstantin Ananyev
2020-10-05 18:45     ` [dpdk-dev] [PATCH v3 08/14] acl: introduce 256-bit width AVX512 classify implementation Konstantin Ananyev
2020-10-05 18:45     ` [dpdk-dev] [PATCH v3 09/14] acl: update default classify algorithm selection Konstantin Ananyev
2020-10-05 18:45     ` [dpdk-dev] [PATCH v3 10/14] acl: introduce 512-bit width AVX512 classify implementation Konstantin Ananyev
2020-10-05 18:45     ` [dpdk-dev] [PATCH v3 11/14] acl: for AVX512 classify use 4B load whenever possible Konstantin Ananyev
2020-10-05 18:45     ` [dpdk-dev] [PATCH v3 12/14] acl: deduplicate AVX512 code paths Konstantin Ananyev
2020-10-05 18:45     ` [dpdk-dev] [PATCH v3 13/14] test/acl: add AVX512 classify support Konstantin Ananyev
2020-10-05 18:45     ` [dpdk-dev] [PATCH v3 14/14] app/acl: " Konstantin Ananyev
2020-10-06 15:03     ` [dpdk-dev] [PATCH v4 00/14] acl: introduce AVX512 classify methods Konstantin Ananyev
2020-10-06 15:03       ` [dpdk-dev] [PATCH v4 01/14] acl: fix x86 build when compiler doesn't support AVX2 Konstantin Ananyev
2020-10-08 13:42         ` [dpdk-dev] [dpdk-stable] " David Marchand
2020-10-06 15:03       ` [dpdk-dev] [PATCH v4 02/14] doc: fix missing classify methods in ACL guide Konstantin Ananyev
2020-10-08 13:42         ` David Marchand
2020-10-06 15:03       ` [dpdk-dev] [PATCH v4 03/14] acl: remove of unused enum value Konstantin Ananyev
2020-10-06 15:03       ` [dpdk-dev] [PATCH v4 04/14] acl: remove library constructor Konstantin Ananyev
2020-10-06 15:03       ` [dpdk-dev] [PATCH v4 05/14] app/acl: few small improvements Konstantin Ananyev
2020-10-06 15:03       ` [dpdk-dev] [PATCH v4 06/14] test/acl: expand classify test coverage Konstantin Ananyev
2020-10-06 15:03       ` [dpdk-dev] [PATCH v4 07/14] acl: add infrastructure to support AVX512 classify Konstantin Ananyev
2020-10-13 19:17         ` David Marchand
2020-10-13 22:26           ` Ananyev, Konstantin
2020-10-06 15:03       ` [dpdk-dev] [PATCH v4 08/14] acl: introduce 256-bit width AVX512 classify implementation Konstantin Ananyev
2020-10-06 15:03       ` [dpdk-dev] [PATCH v4 09/14] acl: update default classify algorithm selection Konstantin Ananyev
2020-10-06 15:03       ` [dpdk-dev] [PATCH v4 10/14] acl: introduce 512-bit width AVX512 classify implementation Konstantin Ananyev
2020-10-06 15:03       ` [dpdk-dev] [PATCH v4 11/14] acl: for AVX512 classify use 4B load whenever possible Konstantin Ananyev
2020-10-06 15:03       ` [dpdk-dev] [PATCH v4 12/14] acl: deduplicate AVX512 code paths Konstantin Ananyev
2020-10-16 15:56         ` Ferruh Yigit
2020-10-16 16:20           ` Thomas Monjalon
2020-10-06 15:03       ` [dpdk-dev] [PATCH v4 13/14] test/acl: add AVX512 classify support Konstantin Ananyev
2020-10-14 10:26         ` David Marchand
2020-10-14 10:32           ` Ananyev, Konstantin
2020-10-14 10:35             ` David Marchand
2020-10-06 15:03       ` [dpdk-dev] [PATCH v4 14/14] app/acl: " Konstantin Ananyev
2020-10-14 12:40       ` [dpdk-dev] [PATCH v4 00/14] acl: introduce AVX512 classify methods David Marchand
2020-10-06 15:05     ` [dpdk-dev] [PATCH v3 " David Marchand
2020-10-06 16:07       ` Ananyev, Konstantin
2020-10-08 10:49         ` David Marchand
2020-10-14  9:23         ` Kinsella, Ray [this message]

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