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From: Saidi, Ali <[email protected]>
To: Christoph Berg <[email protected]>
To: Pop, Sebastian <[email protected]>
Cc: PostgreSQL in Debian <[email protected]>
Cc: Csoma, Csaba <[email protected]>
Subject: Re: [PATCH] audo-detect and use -moutline-atomics compilation flag for aarch64
Date: Thu, 11 Nov 2021 17:22:19 +0000
Message-ID: <[email protected]> (raw)
In-Reply-To: <[email protected]>
References: <[email protected]>
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On 11/11/21, 11:14 AM, "Christoph Berg" <[email protected]> wrote:

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    Re: Pop, Sebastian
    > > The benchmarks in
    > > https://www.postgresql.org/message-id/1C8D0E58-FB33-4105-AC00-8FA07621F5DD%40amazon.com
    > > don't look like the option is a game-changer.
    >
    > Since then we have seen benchmarks that are several orders of magnitude faster with LSE instructions.
    > I will get the new data and share.
    >
    > > Even if we are convinced, we don't have the infrastructure in the
    > > package yet to do architecture- and distribution-specific
    > > optimizations. Would you (Amazon?) be willing to sponsor the required
    > > package engineering?
    >
    > Yes, I am willing to do whatever is necessary to enable the flag on PostgreSQL builds for Ubuntu 20.04.
    > Please point me to the (git?) repo and the files that need to be changed.

The binary compiled with -moutline-atomics works for all arm64 architecture versions. I don't believe there would be new package engineering required unless I'm missing something, but if there is, yes, we're absolutely happy to help. 

Thanks,
Ali

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