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help / color / mirror / Atom feedFrom: Michael Paquier <michael@paquier.xyz>
To: Lukas Fittl <lukas@fittl.com>
Cc: Andres Freund <andres@anarazel.de>
Cc: pgsql-hackers <pgsql-hackers@postgresql.org>
Cc: David Geier <geidav.pg@gmail.com>
Cc: Pavel Stehule <pavel.stehule@gmail.com>
Cc: vignesh C <vignesh21@gmail.com>
Cc: Ibrar Ahmed <ibrar.ahmad@gmail.com>
Cc: Maciek Sakrejda <m.sakrejda@gmail.com>
Cc: Tomas Vondra <tomas@vondra.me>
Subject: Re: Reduce timing overhead of EXPLAIN ANALYZE using rdtsc?
Date: Mon, 28 Jul 2025 15:38:20 +0900
Message-ID: <aIca3DzuZt0Ac8SO@paquier.xyz> (raw)
In-Reply-To: <CAP53Pky-BN0Ui+A9no3TsU=GoMTFpxYSWYtp_LVaDH=y69BxNg@mail.gmail.com>
References: <20230123174158.rhmrbmjp6ycak64r@awork3.anarazel.de>
<a9b2649b-36a0-2e69-e1fd-779e5faf4b7d@gmail.com>
<20230207181218.47irz3of34qsww5l@awork3.anarazel.de>
<989acbcf-e950-7911-c2e2-fe7aa7d15108@gmail.com>
<eba40e62-c1d0-810b-55c2-c037a2dc578c@gmail.com>
<198ef658-a5b7-9862-2017-faf85d59e3a8@gmail.com>
<20240601185200.riqzbabh5azna2fr@alap3.anarazel.de>
<CAP53PkzO2KpscD-tgFW_V-4WS+vkniH4-B00eM-e0bsBF-xUxg@mail.gmail.com>
<bub2rnqvjrg6k2c6jl7c7spw6pb6gv3kk7mjhsqhtbhtpakkf7@kog6pllgdehz>
<CAP53Pky-BN0Ui+A9no3TsU=GoMTFpxYSWYtp_LVaDH=y69BxNg@mail.gmail.com>
On Sun, Jul 27, 2025 at 12:50:54PM -0700, Lukas Fittl wrote:
> 0001 - Improve the __cpuidex check added for a different purpose
> in 792752af4eb5 to:
>
> - Fix a typo (configure was incorrectly checking for "__get_cpuidex", vs
> meson.build was doing it correctly)
It seems to me that this is an independent issue that had better be
backpatched down to where this configure check has been introduced,
no?
> - Adds support for non-MSVC compilers as well (e.g. GCC 11+), where
> __cpuidex is defined in cpuid.h, not intrin.h
This one should be a HEAD-only change.
--
Michael
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To: pgsql-hackers@postgresql.org
Cc: michael@paquier.xyz, lukas@fittl.com, andres@anarazel.de, geidav.pg@gmail.com, pavel.stehule@gmail.com, vignesh21@gmail.com, ibrar.ahmad@gmail.com, m.sakrejda@gmail.com, tomas@vondra.me
Subject: Re: Reduce timing overhead of EXPLAIN ANALYZE using rdtsc?
In-Reply-To: <aIca3DzuZt0Ac8SO@paquier.xyz>
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