From: Bruce Richardson <bruce.richardson@intel.com>
To: Khadem Ullah <14pwcse1224@uetpeshawar.edu.pk>
Cc: <dev@dpdk.org>, <stable@dpdk.org>
Subject: Re: [PATCH] doc: clarify disabling AVX-512 when building on Haswell CPUs
Date: Wed, 2 Jul 2025 14:56:19 +0100 [thread overview]
Message-ID: <aGU6gytRyMaNaZQg@bricha3-mobl1.ger.corp.intel.com> (raw)
In-Reply-To: <20250702133649.1931134-1-14pwcse1224@uetpeshawar.edu.pk>
On Wed, Jul 02, 2025 at 09:36:49AM -0400, Khadem Ullah wrote:
> Some Intel Xeon processors (e.g., E5 v3 Haswell) do not support AVX-512
> instructions, and building DPDK targeting 'native' instruction set can
> fail with 'target specific option mismatch' errors.
>
> This patch updates the build guide with instructions for configuring
> Meson to disable AVX-512 and target the Haswell architecture.
>
> Bugzilla ID: 1736
> Cc: stable@dpdk.org
>
> Signed-off-by: Khadem Ullah <14pwcse1224@uetpeshawar.edu.pk>
> ---
> doc/guides/linux_gsg/build_dpdk.rst | 22 ++++++++++++++++++++++
> 1 file changed, 22 insertions(+)
>
This should not be necessary, and investigation seems to point towards an
issue with older gcc-8.5 compiler. Builds on machines without AVX-512, e.g.
my old i7-4770 desktop machine, work fine with latest Ubuntu, and also with
clang on centos-stream 8. Only the build with gcc 8.5 fails.
/Bruce
prev parent reply other threads:[~2025-07-02 13:56 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-07-02 13:36 Khadem Ullah
2025-07-02 13:56 ` Bruce Richardson [this message]
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