[OpenJDK Rasterizer] Marlin #4

[Sergey Bylokhov]

My patch below: 
>====================================< 
diff -r 2b680924a73f make/lib/Awt2dLibraries.gmk 
--- a/make/lib/Awt2dLibraries.gmk Wed Sep 16 18:34:38 2015 +0300 
+++ b/make/lib/Awt2dLibraries.gmk Thu Oct 01 17:06:38 2015 +0300 
@@ -243,7 +243,7 @@ 
EXCLUDES := $(LIBAWT_EXCLUDES), \ 
EXCLUDE_FILES := $(LIBAWT_EXFILES), \ 
OPTIMIZATION := LOW, \ 
- CFLAGS := $(CFLAGS_JDKLIB) $(LIBAWT_CFLAGS), \ 
+ CFLAGS := -fgcse-after-reload -ftree-vectorize $(CFLAGS_JDKLIB) $(LIBAWT_CFLAGS), \ 
DISABLED_WARNINGS_gcc := sign-compare unused-result maybe-uninitialized \ 
format-nonliteral parentheses, \ 
>====================================< 

The next commands will show gcc commandline 
touch jdk/src/java.desktop/share/native/libawt/java2d/loops/AnyInt.c 
make images LOG=debug 

----- bourges.laurent at gmail.com wrote: 
> 

Sergey, 

Thanks for having tests. 

What is the units of your your results ? 
> I guess it is on the time axis: slower values are better. 

How did you hack the gcc options in the openjdk build scripts ? 
> I could try on my local build too. 

Bye, 
> Laurent 

Le 1 oct. 2015 17:39, "Sergey Bylokhov" < sergey.bylokhov at oracle.com > a écrit : 
> > 
> > I got results below after I made a hack and added -march=native to the libawt library: 
> > 
> > "EllipseFill.fillEllipse 1400" 
> > 8u60_RE: 6,540 
> > 9_dev: 8,457 
> > 9_hack: 6,276 
> > 
> > So we have a window for tweaking. 
> > 
> > ----- sergey.bylokhov at oracle.com wrote: 
> > 
> > > Hello, 
> > > I built both version of jdk8 and jdk9 on my local system, and compares 
> > > output of preprocessor and generated assemblers, both are identical. 
> > > But jdk8u60 from RE actually 20% faster than my version of jdk8. It 
> > > seems that the difference is in the compiler and/or in some 
> > > compiler(gcc) options used by default. 
> > > 
> > > ----- james.graham at oracle.com wrote: 
> > > 
> > > > As far as why the software loops are slower... 
> > > > 
> > > > Did any command line options change for compiling IntArgbPre.c? 
> > > Touch 
> > > > 
> > > > the file and rebuild and verify if the compiler options are the same 
> > > 
> > > > (and that both builds use the same compiler)... 
> > > > 
> > > > ...jim 
>
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