| From: | Konstantin Knizhnik <k(dot)knizhnik(at)postgrespro(dot)ru> |
|---|---|
| To: | Andres Freund <andres(at)anarazel(dot)de> |
| Cc: | pgsql-hackers(at)lists(dot)postgresql(dot)org |
| Subject: | Re: JIT compiling with LLVM v9.0 |
| Date: | 2018-01-26 07:44:24 |
| Message-ID: | 0524d8f1-96d5-3633-5a20-e9a55a338a18@postgrespro.ru |
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| Thread: | |
| Lists: | pgsql-hackers |
> Hi,
>
> I've spent the last weeks working on my LLVM compilation patchset. In
> the course of that I *heavily* revised it. While still a good bit away
> from committable, it's IMO definitely not a prototype anymore.
>
>
Below are results on my system for Q1 TPC-H scale 10 (~13Gb database)
Options
Time
Default
20075
jit_expressions=on
16105
jit_tuple_deforming=on 14734
jit_perform_inlining=on
13441
Also I noticed that parallel execution didsables JIT.
At my computer with 4 cores time of Q1 with parallel execution is 6549.
Are there any principle problems with combining JIT and parallel execution?
--
Konstantin Knizhnik
Postgres Professional: http://www.postgrespro.com
The Russian Postgres Company
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