diff options
Diffstat (limited to 'lib/libthr/arch')
| -rw-r--r-- | lib/libthr/arch/amd64/Makefile.inc | 6 | ||||
| -rw-r--r-- | lib/libthr/arch/i386/Makefile.inc | 6 |
2 files changed, 12 insertions, 0 deletions
diff --git a/lib/libthr/arch/amd64/Makefile.inc b/lib/libthr/arch/amd64/Makefile.inc index e6d99ec..0ae764c 100644 --- a/lib/libthr/arch/amd64/Makefile.inc +++ b/lib/libthr/arch/amd64/Makefile.inc @@ -1,3 +1,9 @@ #$FreeBSD$ SRCS+= pthread_md.c _umtx_op_err.S + +# With the current compiler and libthr code, using SSE in libthr +# does not provide enough performance improvement to outweigh +# the extra context switch cost. This can measurably impact +# performance when the application also does not use enough SSE. +CFLAGS+=${CFLAGS_NO_SIMD} diff --git a/lib/libthr/arch/i386/Makefile.inc b/lib/libthr/arch/i386/Makefile.inc index 01290d5..81fb6bb 100644 --- a/lib/libthr/arch/i386/Makefile.inc +++ b/lib/libthr/arch/i386/Makefile.inc @@ -1,3 +1,9 @@ # $FreeBSD$ SRCS+= pthread_md.c _umtx_op_err.S + +# With the current compiler and libthr code, using SSE in libthr +# does not provide enough performance improvement to outweigh +# the extra context switch cost. This can measurably impact +# performance when the application also does not use enough SSE. +CFLAGS+=${CFLAGS_NO_SIMD} |
