mirror of
https://github.com/apple/swift.git
synced 2025-12-14 20:36:38 +01:00
038303b1b1
This seems to more than fix a performance regression that we detected on a metadata-allocation microbenchmark. A few months ago, I improved the metadata cache representation and changed the metadata allocation scheme to primarily use malloc. Previously, we'd been using malloc in the concurrent tree data structure but a per-cache slab allocator for the metadata itself. At the time, I was concerned about the overhead of per-cache allocators, since many metadata patterns see only a small number of instantiations. That's still an important factor, so in the new scheme we're using a global allocator; but instead of using malloc for individual allocations, we're using a slab allocator, which should have better peak, single-thread performance, at the cost of not easily supporting deallocation. Deallocation is only used for metadata when there's contention on the cache, and specifically only when there's contention for the same key, so leaking a little isn't the worst thing in the world. The initial slab is a 64K globally-allocated buffer. Successive slabs are 16K and allocated with malloc. rdar://28189496
84 lines
1.6 KiB
Bash
Executable File
84 lines
1.6 KiB
Bash
Executable File
#!/usr/bin/env bash
|
|
|
|
#
|
|
# Generate the static-stdlib-args.lnk used by the -static-stdlib option for
|
|
# 'GenericUnix' (eg linux) plaforms. Tries to find static .a files for libs
|
|
# not normally installed by default (currently libicu)
|
|
# If libicu is built locally then include libicudata
|
|
#
|
|
|
|
# SDK=$1
|
|
OUTPUTFILE=$2
|
|
ICU_STATIC_LIB=$3
|
|
# libdirs from pkg-config
|
|
ICU_UC_LIBDIR=$4
|
|
ICU_I18N_LIBDIR=$5
|
|
|
|
|
|
# Try and find the libicu .a library files to directly link in using the
|
|
# fullpath to the files otherwise fullback to the default
|
|
function find_static_iculibs {
|
|
if [ -n "${ICU_I18N_LIBDIR}" ]; then
|
|
LIBICU_I18N_A=${ICU_I18N_LIBDIR}/libicui18n.a
|
|
fi
|
|
|
|
if [ -n "${ICU_UC_LIBDIR}" ]; then
|
|
LIBICU_UC_A=${ICU_UC_LIBDIR}/libicuuc.a
|
|
LIBICU_DATA_A=${ICU_UC_LIBDIR}/libicudata.a
|
|
fi
|
|
|
|
if [ -f "${LIBICU_I18N_A}" ] && [ -f "${LIBICU_UC_A}" ] &&
|
|
[ -f "${LIBICU_DATA_A}" ]; then
|
|
read -d '' ICU_LIBS <<EOF
|
|
$LIBICU_I18N_A
|
|
$LIBICU_UC_A
|
|
$LIBICU_DATA_A
|
|
EOF
|
|
else
|
|
read -d '' ICU_LIBS <<EOF
|
|
-licui18n
|
|
-licuuc
|
|
EOF
|
|
fi
|
|
}
|
|
|
|
|
|
# If libicu was compiled as part of the swift build then link the libs as normal
|
|
function use_local_iculibs {
|
|
read -d '' ICU_LIBS <<EOF
|
|
-licui18n
|
|
-licuuc
|
|
-licudata
|
|
EOF
|
|
}
|
|
|
|
|
|
function write_linkfile {
|
|
if [ -z "${OUTPUTFILE}" ]; then
|
|
echo $0: No outputfile specified
|
|
exit 1
|
|
fi
|
|
cat >$OUTPUTFILE <<EOF
|
|
-ldl
|
|
-lpthread
|
|
-lswiftCore
|
|
-latomic
|
|
-lswiftImageInspectionShared
|
|
$ICU_LIBS
|
|
-Xlinker
|
|
-export-dynamic
|
|
-Xlinker
|
|
--exclude-libs
|
|
-Xlinker
|
|
ALL
|
|
EOF
|
|
}
|
|
|
|
|
|
if [ "${ICU_STATIC_LIB}" == "TRUE" ]; then
|
|
use_local_iculibs
|
|
else
|
|
find_static_iculibs
|
|
fi
|
|
write_linkfile
|