This simple patch doubles the compile-speed of the hotspot repo on Windows (original) (raw)

Kelly O'Hair kelly.ohair at oracle.com
Sat Feb 2 00:42:15 UTC 2013

Great stuff. Have you filed an issue on this? Or shall I?

-kto

On Feb 1, 2013, at 4:58 AM, Fredrik Öhrström wrote:

ie. use /MP on the cl.exe command line.

On the build machine (Windows Server 2007, Visual Studio 2010, 32 HT cores, 64GB ram) configuring with: sh configure --enable-sjavac --with-freetype=/cygdrive/d/tools/freetype-amd64 --with-boot-jdk=/cygdrive/d/java/jdk-7-fcs-bin-b147/ (You need to patch src/share/classes/com/sun/tools/sjavac/server/CompilerThread.java line 256, change equals("windows)" to startswith("windows), this fix is going into tl soon.) Without MP ----- Build times ------- Start 2013-02-01 12:23:50 End 2013-02-01 12:35:20 00:00:32 corba 00:04:43 hotspot 00:00:15 jaxp 00:00:24 jaxws 00:04:49 jdk 00:00:46 langtools 00:11:30 TOTAL ------------------------- With MP ----- Build times ------- Start 2013-02-01 12:54:54 End 2013-02-01 13:03:56 00:00:31 corba 00:02:20 hotspot 00:00:14 jaxp 00:00:22 jaxws 00:04:44 jdk 00:00:46 langtools 00:09:02 TOTAL ------------------------- For such a simple patch it is a nice speedup. Please test and see if it improves the speed on your multi core machines. //Fredrik Oh, and for reference this is the speed without sjavac but with /MP. ----- Build times ------- Start 2013-02-01 13:39:38 End 2013-02-01 13:51:46 00:00:35 corba 00:02:24 hotspot 00:00:28 jaxp 00:00:36 jaxws 00:07:11 jdk 00:00:48 langtools 00:12:08 TOTAL ------------------------- $ hg diff diff -r 67498c863813 make/windows/makefiles/compile.make --- a/make/windows/makefiles/compile.make Thu Jan 17 12:16:06 2013 +0100 +++ b/make/windows/makefiles/compile.make Fri Feb 01 13:05:08 2013 +0100 @@ -44,6 +44,7 @@ # /GS Inserts security stack checks in some functions (VS2005 default) # /Oi Use intrinsics (in /O2) # /Od Disable all optimizations +# /MP Use multiple cores for compilation # # NOTE: Normally following any of the above with a '-' will turn off that flag # @@ -52,7 +53,7 @@ # improving the quality of crash log stack traces involving jvm.dll. # These are always used in all compiles -CXXFLAGS=/nologo /W3 /WX +CXXFLAGS=/nologo /W3 /WX /MP # Let's add debug information when Full Debug Symbols is enabled !if "$(ENABLEFULLDEBUGSYMBOLS)" == "1" diff -r 67498c863813 make/windows/makefiles/sa.make --- a/make/windows/makefiles/sa.make Thu Jan 17 12:16:06 2013 +0100 +++ b/make/windows/makefiles/sa.make Fri Feb 01 13:05:08 2013 +0100 @@ -108,6 +108,8 @@ SALFLAGS = $(SALFLAGS) -map -debug !endif +SACFLAGS = $(SACFLAGS) -MP + # Note that we do not keep sawindbj.obj around as it would then # get included in the dumpbin command in buildvmdef.sh

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