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From: "xry111 at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/112919] LoongArch: Alignments in tune parameters are not
 precise and they regress performance
Date: Thu, 07 Mar 2024 11:09:49 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D112919

--- Comment #15 from Xi Ruoyao <xry111 at gcc dot gnu.org> ---
> Hi=EF=BC=8CRuoyao:
>=20
>  The results of spec2006 on 3A6000 were obtained, I removed the more vola=
tile
> test items, '-falign-loops=3D8 -falign-functions=3D8 -falign-jumps=3D32
> -falign-lables=3D4' this set of parameters got the highest score. This is=
 the
> same combination of parameters as the coremark tested by Xu Chenghua.
>=20
> The test of the 3A5000 will also be completed around the 15th of this mon=
th,
> so I want to change the code after the test results of the 3a5000 are out.
> What do you think?

Ok to me.

I'm getting some different results on LA664:

22031.284424 Compiler flags : -O2 -falign-labels=3D4 -falign-functions=3D8
-falign-loops=3D8 -falign-jumps=3D32 -DPERFORMANCE_RUN=3D1 -lrt

vs the "best" one:

22075.055188 Compiler flags : -O2 -falign-labels=3D4 -falign-functions=3D32
-falign-loops=3D16 -falign-jumps=3D8 -DPERFORMANCE_RUN=3D1 -lrt

maybe such a 0.1% difference is some random fluctuation, or hardware or ker=
nel
configuration difference anyway.=