JDK-8205528 : Base64 encoding algorithm using AVX512 instructions
  • Type: Enhancement
  • Component: hotspot
  • Sub-Component: compiler
  • Priority: P3
  • Status: Resolved
  • Resolution: Fixed
  • CPU: x86
  • Submitted: 2018-06-22
  • Updated: 2024-09-25
  • Resolved: 2018-06-28
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JDK 11 JDK 12
11 b20Fixed 12Fixed
Related Reports
Relates :  
JDK-8217467 - Access barriers are missing in C2 intrinsic for Base64
Relates :  
JDK-8211332 - code_size2 (defined in stub_routines_x86.hpp) is too small on new Skylake CPUs
Relates :  
JDK-8318048 - Incorrect register encoding of AVX-512 instruction for vector indexed load
Relates :  
JDK-8206093 - compiler/graalunit/HotspotTest.java fails in CheckGraalIntrinsics
Relates :  
JDK-8321215 - Incorrect x86 instruction encoding for VSIB addressing mode
Description
The code gives 1.5x performance gain as measured on SKL system
Comments
URL: http://hg.openjdk.java.net/jdk/jdk/rev/480a96a43b62 User: kvn Date: 2018-06-28 03:17:16 +0000
28-06-2018
gc/parallel/TestPrintGCDetailsVerbose.java failed due to JDK-8205577.
28-06-2018
vmTestbase/metaspace/staticReferences/StaticReferences.java failed with existing code - not new failure. compiler/c2/TestThreadInterruptedAndNotified.java Agent timeout - JDK-8205526. servicability/sa/ tests failed on SPARC. These changes should not affect SPARC code.
28-06-2018
http://cr.openjdk.java.net/~srukmannagar/Base64/webrev.01/
27-06-2018
Hit build failure on Windows: jib > t:/workspace/open/src/hotspot/cpu/x86/stubGenerator_x86_64.cpp(4556): error C2024: 'alignas' attribute applies to variables, data members and tag types only jib > t:/workspace/open/src/hotspot/cpu/x86/stubGenerator_x86_64.cpp(4595): error C2024: 'alignas' attribute applies to variables, data members and tag types only jib > t:/workspace/open/src/hotspot/cpu/x86/stubGenerator_x86_64.cpp(4634): error C2024: 'alignas' attribute applies to variables, data members and tag types only jib > t:/workspace/open/src/hotspot/cpu/x86/stubGenerator_x86_64.cpp(4649): error C2024: 'alignas' attribute applies to variables, data members and tag types only jib > t:/workspace/open/src/hotspot/cpu/x86/stubGenerator_x86_64.cpp(4664): error C2024: 'alignas' attribute applies to variables, data members and tag types only jib > t:/workspace/open/src/hotspot/cpu/x86/stubGenerator_x86_64.cpp(4679): error C2024: 'alignas' attribute applies to variables, data members and tag types only jib > t:/workspace/open/src/hotspot/cpu/x86/stubGenerator_x86_64.cpp(4693): error C2024: 'alignas' attribute applies to variables, data members and tag types only jib > lib/CompileJvm.gmk:149: recipe for target '/cygdrive/t/workspace/build/windows-x64/hotspot/variant-server/libjvm/objs/stubGenerator_x86_64.obj' failed
27-06-2018
Updated Webrev: http://cr.openjdk.java.net/~srukmannagar/Base64/webrev.00/
26-06-2018
Code contributed by: Smita Kamath(smita.kamath@intel.com) Webrev: http://cr.openjdk.java.net/~vdeshpande/Base64/webrev.00/
22-06-2018