https://gcc.gnu.org/bugzilla/show_bug.cgi?id=114531
--- Comment #7 from Rama Malladi <rvmallad at amazon dot com> ---
(In reply to Rama Malladi from comment #5)
> (In reply to Andrew Pinski from comment #3)
> > Also do you have numbers with lto enabled? Or is these without lto?
> >
> > Does LTO improve the situation for Envoy too?
>
> These numbers are without lto. I haven't tried it but I can try and post an
> update.
I checked and found the Envoy run was w/o LTO but SPEC cpu2017 intrate was w
LTO.
I tried a build of Envoy w LTO and it failed. I need to debug that issue
further.
Below are perf results w/o LTO. gcc version 11.4.0 (Ubuntu
11.4.0-1ubuntu1~22.04).
copies=8 -O2 -Ofast Gain w -O2 + inlining Gain w
noLTO noLTO Ofast noLTO inlining
500.perlbench_r 33.7 33.3 98.8% 33.2 98.5%
502.gcc_r 45.2 46.9 103.8% 46.3 102.4%
505.mcf_r 44.7 44.3 99.1% 44.6 99.8%
520.omnetpp_r 21.4 24.4 114.0% 21.3 99.5%
523.xalancbmk_r 41.6 45.5 109.4% 44 105.8%
525.x264_r 44.2 89 201.4% 43.9 99.3%
531.deepsjeng_r 32.8 32.8 100.0% 33.1 100.9%
541.leela_r 28.6 30.5 106.6% 30.3 105.9%
548.exchange2_r 64.1 64.6 100.8% 64.1 100.0%
557.xz_r 20.3 20.4 100.5% 20.3 100.0%
SPECrate..base 35.6 39.4 110.7% 36 101.1%
