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From: Nathan Bossart <nathandbossart@gmail.com>
To: David Rowley <dgrowleyml@gmail.com>
Cc: Amonson, Paul D <paul.d.amonson@intel.com>
Cc: Andres Freund <andres@anarazel.de>
Cc: Alvaro Herrera <alvherre@alvh.no-ip.org>
Cc: Shankaran, Akash <akash.shankaran@intel.com>
Cc: Noah Misch <noah@leadboat.com>
Cc: Tom Lane <tgl@sss.pgh.pa.us>
Cc: Matthias van de Meent <boekewurm+postgres@gmail.com>
Cc: pgsql-hackers@lists.postgresql.org <pgsql-hackers@lists.postgresql.org>
Subject: Re: Popcount optimization using AVX512
Date: Mon, 18 Mar 2024 10:29:02 -0500
Message-ID: <20240318152902.GA2850@nathanxps13> (raw)
In-Reply-To: <CAApHDvrb7MJRB6JuKLDEY2x_LKdFHwVbogpjZBCX547i5+rXOQ@mail.gmail.com>
References: <BL1PR11MB53047C28DDBA6A2E77B9420ADC222@BL1PR11MB5304.namprd11.prod.outlook.com>
	<20240305163730.GA3479896@nathanxps13>
	<BL1PR11MB530444AEE08A91242ABA1915DC222@BL1PR11MB5304.namprd11.prod.outlook.com>
	<20240307173318.GA455851@nathanxps13>
	<20240307213600.GA563369@nathanxps13>
	<BL1PR11MB5304165E7A81E0107E70B069DC242@BL1PR11MB5304.namprd11.prod.outlook.com>
	<20240312013436.GA1787866@nathanxps13>
	<BL1PR11MB53042473B7B53B96E43648A7DC292@BL1PR11MB5304.namprd11.prod.outlook.com>
	<20240315150611.GA3495582@nathanxps13>
	<CAApHDvrb7MJRB6JuKLDEY2x_LKdFHwVbogpjZBCX547i5+rXOQ@mail.gmail.com>

On Mon, Mar 18, 2024 at 09:56:32AM +1300, David Rowley wrote:
> Maybe it's worth exploring something along the lines of the attached
> before doing the AVX512 stuff.  It seems like a pretty good speed-up
> and will apply for CPUs without AVX512 support.

+1

-- 
Nathan Bossart
Amazon Web Services: https://aws.amazon.com





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