Hello.
Please review the fix for jdk 9.
This issue initially was found in FX[1], and there is description of
this problem.
In the fix the flip operation is done using memcpy after the whole image
was moved from gpu to cpu.
[1] https://javafx-jira.kenai.com/browse/RT-30035
Bug: https://bugs.openjdk.java.net/browse/JDK-8041129
Webrev can be found at: http://cr.openjdk.java.net/~serb/8041129/webrev.01
Benchmarks:
==========================================================
Windows 7 x64, lenovo T410, nvidia NVS 3100M
http://cr.openjdk.java.net/~serb/8041129/J2DBench/results
base ogl vs base d3d vs fixed ogl
Summary:
OGL-base-nvidia-windows:
Number of tests: 10
Overall average: 2239.9261323744704
Best spread: 1.72% variance
Worst spread: 88.61% variance
(Basis for results comparison)
OGL-fix-nvidia-windows:
Number of tests: 10
Overall average: 166667.93024226945
Best spread: 1.23% variance
Worst spread: 66.19% variance
Comparison to basis:
Best result: 13719.74% of basis
Worst result: 97.17% of basis
Number of wins: 8
Number of ties: 1
Number of losses: 1
D3D-base-nvidia-windows:
Number of tests: 10
Overall average: 29755.21747098
Best spread: 0.34% variance
Worst spread: 61.12% variance
Comparison to basis:
Best result: 12068.41% of basis
Worst result: 8.05% of basis
Number of wins: 6
Number of ties: 0
Number of losses: 4
==========================================================
OSX 10.8.5, macbook pro retina, nvidia GeForce GT 650M 1024 MB
http://cr.openjdk.java.net/~serb/8041129/J2DBench-osx/results-nvidia-osx.txt
Summary:
OGL-base-nvidia-osx:
Number of tests: 10
Overall average: 710.7070782394075
Best spread: 0.73% variance
Worst spread: 5.72% variance
(Basis for results comparison)
OGL-fix-nvidia-osx:
Number of tests: 10
Overall average: 11032.674771293528
Best spread: 0.62% variance
Worst spread: 8.14% variance
Comparison to basis:
Best result: 4659.95% of basis
Worst result: 169.66% of basis
Number of wins: 10
Number of ties: 0
Number of losses: 0
==========================================================
OSX 10.8.5, macbook pro retina, Intel HD Graphics 4000
http://cr.openjdk.java.net/~serb/8041129/J2DBench-osx/results-intel-osx.txt
Summary:
OGL-base-intel-osx:
Number of tests: 10
Overall average: 3993.5366388495613
Best spread: 0.65% variance
Worst spread: 20.91% variance
(Basis for results comparison)
OGL-fix-intel-osx:
Number of tests: 10
Overall average: 10197.361705976433
Best spread: 0.72% variance
Worst spread: 38.4% variance
Comparison to basis:
Best result: 491.0% of basis
Worst result: 108.61% of basis
Number of wins: 10
Number of ties: 0
Number of losses: 0
Thanks to Anton for the initial version of the fix.
--
Best regards, Sergey.
