From: Alvaro Herrera <alvherre@2ndquadrant.com>
To: Andrew Gierth <andrew@tao11.riddles.org.uk>
Cc: David Rowley <david.rowley@2ndquadrant.com>
Cc: PostgreSQL Hackers <pgsql-hackers@lists.postgresql.org>
Cc: Thomas Munro <thomas.munro@enterprisedb.com>
Subject: Re: Using POPCNT and other advanced bit manipulation instructions
Date: Wed, 13 Feb 2019 17:59:04 -0300
Message-ID: <20190213205904.GA13925@alvherre.pgsql> (raw)
In-Reply-To: <87d0nvo2fh.fsf@news-spur.riddles.org.uk>
On 2019-Feb-13, Andrew Gierth wrote:
> >>>>> "Alvaro" == Alvaro Herrera <alvherre@2ndquadrant.com> writes:
>
> Alvaro> I've pushed this now. Let's see what the buildfarm has to say
> Alvaro> about it.
>
> Lapwing's latest failure looks like yours rather than mine now? (the
> previous two were mine)
It definitely is ... plans have changed from using IndexOnly scans to
Seqscans, which is likely fallout from the visibilitymap_count() change.
Looking.
(I patched the Makefile to add -mpopcnt to all the compile lines rather
than just the frontend one, but I can't see that explaining the
failure.)
--
Álvaro Herrera https://www.2ndQuadrant.com/
PostgreSQL Development, 24x7 Support, Remote DBA, Training & Services
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To: pgsql-hackers@postgresql.org
Cc: alvherre@2ndquadrant.com, andrew@tao11.riddles.org.uk, david.rowley@2ndquadrant.com, pgsql-hackers@lists.postgresql.org, thomas.munro@enterprisedb.com
Subject: Re: Using POPCNT and other advanced bit manipulation instructions
In-Reply-To: <20190213205904.GA13925@alvherre.pgsql>
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