What are the optimizations that contribute to ~70% improvement on SPEC06 hmmer benchmark?

[Alejandro Martinez Vicente]

> -----Original Message-----
> From: gcc-owner@gcc.gnu.org <gcc-owner@gcc.gnu.org> On Behalf Of a b
> Sent: 23 May 2019 21:04
> To: gcc gcc <gcc@gcc.gnu.org>
> Subject: What are the optimizations that contribute to ~70% improvement on
> SPEC06 hmmer benchmark?
> 
> Recently I happen to notice that there is more than 70% performance
> improvement for SPEC06 hmmer benchmark from Linaro GCC 5.2-2015.11-
> 2<https://releases.linaro.org/components/toolchain/binaries/5.2-2015.11-2/>
> to GCC 10.0 on ARM platforms.
> 
> I did some quick searching and think loop
> distribution<https://community.arm.com/developer/tools-
> software/tools/b/tools-software-ides-blog/posts/gnu-toolchain-performance-
> in-2018> and
> vectorization<http://www.teratec.eu/library/pdf/forum/2018/Presentations/04
> _Eric_Van_Hensbergen_Arm_Forum_Teratec_2018.pdf> contribute  25% and
> 30%, respectively. But they still don't add up to 70%. Can you explain what else
> is helping here?

1.25 x 1.3 = 1.625 Not far from 1.7 😊

Alejandro

> 
> Thanks