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From: Stephen Hemminger <stephen@networkplumber.org>
To: Staffan Wiklund <staffan491@gmail.com>
Cc: users <users@dpdk.org>
Subject: Re: Are Intel CPUs better than AMD CPUs for DPDK applications?
Date: Mon, 21 Feb 2022 17:49:02 -0800	[thread overview]
Message-ID: <20220221174902.115c1eed@hermes.local> (raw)
In-Reply-To: <CAAV4wTjCe-K0QR9sHYvyhwF9yepq-e=AgDXWX6OmCbkRJ6koGQ@mail.gmail.com>

On Mon, 21 Feb 2022 21:28:08 +0100
Staffan Wiklund <staffan491@gmail.com> wrote:

> Stephen, thanks for your answer.
> I realize the statement is very vague.
> I was thinking of if there was something common in the design of Intel and
> AMD CPUs respectively that has an impact on their use by DPDK applications.
> Do you know if there is such a common design difference between Intel and
> AMD CPUs or is it just a matter of using an Intel or AMD CPU with the
> requested performance?
> 
> Regards
> Staffan

I am not a CPU expert. But compare memory bandwidth, clock rate, PCI Express version
and support for AVX support (for some features). There a few places in DPDK
that can use AVX512 but it is limited 
https://doc.dpdk.org/guides/howto/avx512.html

Also there is a tradeoff with more cores, NUMA, etc as well as cost.

Don't believe simple tribal knowledge, you need to look under the covers.

  reply	other threads:[~2022-02-22  1:49 UTC|newest]

Thread overview: 5+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-02-21 15:14 Staffan Wiklund
2022-02-21 17:08 ` Stephen Hemminger
2022-02-21 20:28   ` Staffan Wiklund
2022-02-22  1:49     ` Stephen Hemminger [this message]
2022-02-22 19:35       ` Staffan Wiklund

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