Re: pglz performance

From: Andrey Borodin <x4mmm(at)yandex-team(dot)ru>
To: Michael Paquier <michael(at)paquier(dot)xyz>
Cc: pgsql-hackers <pgsql-hackers(at)postgresql(dot)org>, Vladimir Leskov <vladimirlesk(at)yandex-team(dot)ru>
Subject: Re: pglz performance
Date: 2019-05-16 17:13:22
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> 15 мая 2019 г., в 15:06, Andrey Borodin <x4mmm(at)yandex-team(dot)ru> написал(а):
> Owners of AMD and ARM devices are welcome.

Yandex hardware RND guys gave me ARM server and Power9 server. They are looking for AMD and some new Intel boxes.

Meanwhile I made some enhancements to test suit:
1. I've added Shakespeare payload: concatenation of works of this prominent poet.
2. For each payload compute "sliced time" - time to decompress payload if it was sliced by 2Kb pieces or 8Kb pieces.
3. For each decompressor we compute "score": (sum of time to decompress each payload, each payload sliced by 2Kb and 8Kb) * 5 times

I've attached full test logs, meanwhile here's results for different platforms.

Intel Server
NOTICE: 00000: Decompressor pglz_decompress_hacked result 10.346763
NOTICE: 00000: Decompressor pglz_decompress_hacked8 result 11.192078
NOTICE: 00000: Decompressor pglz_decompress_hacked16 result 11.957727
NOTICE: 00000: Decompressor pglz_decompress_vanilla result 14.262256

ARM Server
NOTICE: Decompressor pglz_decompress_hacked result 12.966668
NOTICE: Decompressor pglz_decompress_hacked8 result 13.004935
NOTICE: Decompressor pglz_decompress_hacked16 result 13.043015
NOTICE: Decompressor pglz_decompress_vanilla result 18.239242

Power9 Server
NOTICE: Decompressor pglz_decompress_hacked result 10.992974
NOTICE: Decompressor pglz_decompress_hacked8 result 11.747443
NOTICE: Decompressor pglz_decompress_hacked16 result 11.026342
NOTICE: Decompressor pglz_decompress_vanilla result 16.375315

Intel laptop
NOTICE: Decompressor pglz_decompress_hacked result 9.445808
NOTICE: Decompressor pglz_decompress_hacked8 result 9.105360
NOTICE: Decompressor pglz_decompress_hacked16 result 9.621833
NOTICE: Decompressor pglz_decompress_vanilla result 10.661968

From these results pglz_decompress_hacked looks best.

Best regards, Andrey Borodin.

Attachment Content-Type Size
pglz_benchmarks.txt text/plain 24.4 KB

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