Re: Reduce timing overhead of EXPLAIN ANALYZE using rdtsc?

Michael Paquier <michael@paquier.xyz>

From: Michael Paquier <michael@paquier.xyz>

To: Ibrar Ahmed <ibrar.ahmad@gmail.com>

Cc: Maciek Sakrejda <m.sakrejda@gmail.com>, Andres Freund <andres@anarazel.de>, Lukas Fittl <lukas@fittl.com>, pgsql-hackers <pgsql-hackers@postgresql.org>

Date: 2022-10-12T08:33:42Z

Lists: pgsql-hackers

Commits

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pg_test_timing: Also test RDTSC[P] timing, report time source, TSC frequency
- 16fca4825483 19 (unreleased) landed
Allow retrieving x86 TSC frequency/flags from CPUID
- bcb2cf41f964 19 (unreleased) landed
instrumentation: Standardize ticks to nanosecond conversion method
- 0022622c93d9 19 (unreleased) landed
instrumentation: Use Time-Stamp Counter on x86-64 to lower overhead
- 294520c44487 19 (unreleased) landed
Zero initialize uses of instr_time about to trigger compiler warnings
- 25b2aba0c3a5 16.0 landed
instr_time: Represent time as an int64 on all platforms
- 03023a2664f8 16.0 landed
Add 250c8ee07ed to git-blame-ignore-revs
- ff23b592ad66 16.0 cited

On Tue, Sep 06, 2022 at 11:32:18AM +0500, Ibrar Ahmed wrote:
> Hunk #5 succeeded at 147 with fuzz 2 (offset -3 lines).
> Hunk #6 FAILED at 170.
> Hunk #7 succeeded at 165 (offset -69 lines).
> 2 out of 7 hunks FAILED -- saving rejects to file
> src/include/portability/instr_time.h.rej
> patching file src/tools/msvc/Mkvcbuild.pm

No rebased version has been sent since this update, so this patch has
been marked as RwF.
--
Michael