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From: Bruce Richardson <bruce.richardson@intel.com>
To: "Medvedkin, Vladimir" <vladimir.medvedkin@intel.com>
Cc: Konstantin Ananyev <konstantin.ananyev@intel.com>,
	dev@dpdk.org, jerinj@marvell.com, ruifeng.wang@arm.com
Subject: Re: [dpdk-dev] [PATCH v2 07/12] acl: add infrastructure to support AVX512 classify
Date: Wed, 16 Sep 2020 10:49:00 +0100
Message-ID: <20200916094900.GB1849@bricha3-MOBL.ger.corp.intel.com> (raw)
In-Reply-To: <66917b48-ce20-176a-b90e-dfebdf481d15@intel.com>

On Wed, Sep 16, 2020 at 10:36:32AM +0100, Medvedkin, Vladimir wrote:
> Hi Bruce,
> 
> On 16/09/2020 10:11, Bruce Richardson wrote:
> > On Tue, Sep 15, 2020 at 05:50:20PM +0100, Konstantin Ananyev wrote:
> > > Add necessary changes to support new AVX512 specific ACL classify
> > > algorithm:
> > >   - changes in meson.build to check that build tools
> > >     (compiler, assembler, etc.) do properly support AVX512.
> > >   - run-time checks to make sure target platform does support AVX512.
> > >   - dummy rte_acl_classify_avx512() for targets where AVX512
> > >     implementation couldn't be properly supported.
> > > 
> > > Signed-off-by: Konstantin Ananyev <konstantin.ananyev@intel.com>
> > > ---
> > 
> > This all looks correct, though I wonder do you really need to check all
> > those AVX512 flags in each case? Since "F" is always present in any AVX512
> > implementation perhaps it can be checked, though if the other three always
> > need to be checked I can understand if you want to keep it there for
> > completeness. [Are all the other 3 used in your code?]
> > 
> 
> As for me it is good to check all the flags supported by compiler. Some old
> (but still supported by dpdk) gcc can't compile the code in some
> circumstances. For example:
> 
> gcc version 5.4.0 20160609 (Ubuntu 5.4.0-6ubuntu1~16.04.12)   <-- pretty old
> but still supported, right?
> 
> gcc -march=native -dM -E - < /dev/null | grep "AVX512"
> #define __AVX512F__ 1
> #define __AVX512BW__ 1
> #define __AVX512CD__ 1
> #define __AVX512DQ__ 1
> 
> Does not support __AVX512VL__
> 
Interesting, seems like checking them all to be sure is the right approach
so.
My ack stands so, and ignore the comment.

  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 [this message]
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

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