From: Thomas Monjalon <thomas@monjalon.net>
To: Liang Ma <liangma@bytedance.com>
Cc: dev@dpdk.org, stable@dpdk.org, leyi.rong@intel.com,
stable@dpdk.org, Bruce Richardson <bruce.richardson@intel.com>,
Konstantin Ananyev <konstantin.ananyev@intel.com>,
Liang Ma <liangma@liangbit.com>
Subject: Re: [dpdk-stable] [PATCH v4] build: check for broken AVX-512 compiler support
Date: Thu, 22 Jul 2021 19:58:39 +0200 [thread overview]
Message-ID: <3054484.ELAzW8oUhP@thomas> (raw)
In-Reply-To: <20210720133645.938-1-liangma@liangbit.com>
20/07/2021 15:36, Liang Ma:
> From: Liang Ma <liangma@bytedance.com>
>
> GCC 6.3.0 has a known bug which related to _mm512_extracti64x4_epi64.
> Please reference https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82887
>
> Some DPDK PMD avx512 version heavily use _mm512_extracti64x4_epi6,
> which cause building failure with debug buildtype.
>
> Therefore, it's helpful to check if compiler work with
> _mm512_extracti64x4_epi6.
>
> This patch check the compiler compile result against the test code
> snippet. If the checking is failed then disable avx512.
>
> Bugzilla ID: 717
> Fixes: e6a6a138919f (net/i40e: add AVX512 vector path)
> Fixes: 808a17b3c1e6 (net/ice: add Rx AVX512 offload path)
> Fixes: 4b64ccb328c9 (net/iavf: fix VLAN extraction in AVX512 path)
> Cc: stable@dpdk.org
>
> Reported-by: Liang Ma <liangma@liangbit.com>
> Signed-off-by: Liang Ma <liangma@bytedance.com>
> Acked-by: Bruce richardson <bruce.richardson@intel.com>
Applied, thanks.
prev parent reply other threads:[~2021-07-22 17:58 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-07-17 17:08 [dpdk-stable] [PATCH] buildtools: Check GCC version to avoid GCC 6.3.0 avx512 bug Liang Ma
2021-07-17 17:48 ` [dpdk-stable] [dpdk-dev] " Stephen Hemminger
2021-07-17 22:13 ` Liang Ma
2021-07-18 1:08 ` Stephen Hemminger
2021-07-18 9:33 ` Liang Ma
2021-07-19 8:38 ` Bruce Richardson
2021-07-19 10:04 ` Liang Ma
2021-07-19 22:34 ` [dpdk-stable] [PATCH v2] build: check AVX512 rather than compiler version Liang Ma
2021-07-20 10:19 ` Bruce Richardson
2021-07-20 11:24 ` Liang Ma
2021-07-20 11:20 ` [dpdk-stable] [PATCH v3] " Liang Ma
2021-07-20 11:58 ` Bruce Richardson
2021-07-20 13:25 ` Liang Ma
2021-07-20 13:36 ` [dpdk-stable] [PATCH v4] build: check for broken AVX-512 compiler support Liang Ma
2021-07-22 17:58 ` Thomas Monjalon [this message]
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