This simple patch doubles the compile-speed of the hotspot repo on Windows (original) (raw)
Fredrik Öhrström oehrstroem at gmail.com
Fri Feb 1 12:58:56 UTC 2013
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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
-CXX_FLAGS=/nologo /W3 /WX +CXX_FLAGS=/nologo /W3 /WX /MP
Let's add debug information when Full Debug Symbols is enabled
!if "$(ENABLE_FULL_DEBUG_SYMBOLS)" == "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 @@ SA_LFLAGS = $(SA_LFLAGS) -map -debug !endif
+SA_CFLAGS = $(SA_CFLAGS) -MP +
Note that we do not keep sawindbj.obj around as it would then
get included in the dumpbin command in build_vm_def.sh
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