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8331942: On Linux aarch64, CDS archives should be using 64K alignment by default

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Reviewed-by: aph, iklam
This commit is contained in:
Thomas Stuefe 2024-05-10 04:30:17 +00:00
parent a706ca4fdb
commit d2d37c913e
1 changed files with 12 additions and 1 deletions
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13
make/autoconf/jdk-options.m4
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@ -190,6 +190,17 @@ AC_DEFUN_ONCE([JDKOPT_SETUP_JDK_OPTIONS],
fi
AC_SUBST(INCLUDE_SA)
# Setup default CDS alignment. On platforms where one build may run on machines with different
# page sizes, the JVM choses a compatible alignment to fit all possible page sizes. This slightly
# increases archive size.
# The only platform having this problem at the moment is Linux on aarch64, which may encounter
# three different page sizes: 4K, 64K, and if run on Mac m1 hardware, 16K.
COMPATIBLE_CDS_ALIGNMENT_DEFAULT=false
if test "x$OPENJDK_TARGET_OS" = "xlinux" && test "x$OPENJDK_TARGET_CPU" = "xaarch64"; then
COMPATIBLE_CDS_ALIGNMENT_DEFAULT=true
fi
AC_SUBST(COMPATIBLE_CDS_ALIGNMENT_DEFAULT)
# Compress jars
COMPRESS_JARS=false
@ -673,7 +684,7 @@ AC_DEFUN([JDKOPT_ENABLE_DISABLE_CDS_ARCHIVE],
#
AC_DEFUN([JDKOPT_ENABLE_DISABLE_COMPATIBLE_CDS_ALIGNMENT],
[
UTIL_ARG_ENABLE(NAME: compatible-cds-alignment, DEFAULT: false,
UTIL_ARG_ENABLE(NAME: compatible-cds-alignment, DEFAULT: $COMPATIBLE_CDS_ALIGNMENT_DEFAULT,
RESULT: ENABLE_COMPATIBLE_CDS_ALIGNMENT,
DESC: [enable use alternative compatible cds core region alignment],
DEFAULT_DESC: [disabled],