Hi Jan, As I have indicated, use of the Boehm garbage collector inside the MonetDB process is not really an option. If algebra plans can only be compiled with Boehm, than it will become very difficult to use pathfinder inside MonetDB/XQuery. Did you try the option with memory sandboxes that at certain critical stages can be cleared? Peter -----Original Message----- From: monetdb-pf-checkins-bounces@lists.sourceforge.net [mailto:monetdb-pf-checkins-bounces@lists.sourceforge.net]On Behalf Of Jan Rittinger Sent: 22 January 2007 12:26 To: monetdb-pf-checkins@lists.sourceforge.net Subject: [Monetdb-pf-checkins] pathfinder configure.ag,1.91,1.92 Update of /cvsroot/monetdb/pathfinder In directory sc8-pr-cvs7.sourceforge.net:/tmp/cvs-serv7979 Modified Files: configure.ag Log Message: -- Re-integrated Hans Boehms garbage collection library. * This was necessary because more complex queries did run out of memory. (Before we did allocate memory and only freed it at the end. Snapshot based freeing -- meaning after a full tree copy was made -- did help but was a lot slower than using the garbage collection library.) * The old memory allocation (without garbage collection) is still in use whenever pathfinder is used in embedded mode (e.g. if the xquery() command in MonetDB is used). * If the garbage collection library is not detected during configure we avoid to generate an error and use the old memory allocation instead. * The drawback of this change is that the compilation of simple queries is now lot slower (e.g. XMark Q6 takes 400ms to compile). Index: configure.ag =================================================================== RCS file: /cvsroot/monetdb/pathfinder/configure.ag,v retrieving revision 1.91 retrieving revision 1.92 diff -u -d -r1.91 -r1.92 --- configure.ag 21 Jan 2007 16:01:38 -0000 1.91 +++ configure.ag 22 Jan 2007 11:25:59 -0000 1.92 @@ -334,6 +334,70 @@ AC_SUBST(LIBXML2_LDADD, $LIBXML2_LDADD) AM_CONDITIONAL(HAVE_LIBXML2, test x"$have_libxml2" != xno) +dnl See if we have the Hans Boehm garbage collector available +dnl +dnl First allow the user to specify a location on the command line. +dnl Further down see if we find the library and abort if not. +have_gc="auto" +AC_ARG_WITH(gc, + [ --with-gc=DIR Boehm garbage collector library is installed in DIR], + [have_gc="$withval"], [have_gc="auto"]) + +if test "x$have_gc" != xauto; then + LIBGC_CFLAGS="-I$have_gc/include" + LIBGC_LIBS="-L$have_gc/lib" +fi + +if test "x$have_gc" = xauto; then + LIBGC_CFLAGS="" + LIBGC_LIBS="" +fi + +save_CPPFLAGS="$CPPFLAGS" +save_LDFLAGS="$LDFLAGS" +save_LIBS="$LIBS" +CPPFLAGS="$CPPFLAGS $LIBGC_CFLAGS" +LDFLAGS="$LDFLAGS $LIBGC_LIBS" +LIBS="" + +dnl If we have the dl and/or the pthread library, use it +dnl (dl and/or pthread are required for the garbage collection +dnl library on some systems.) +LIBGC_LDADD="" +AC_CHECK_LIB(dl, dlopen, [LIBGC_LDADD="$LIBGC_LDADD -ldl"]) +AC_CHECK_LIB(pthread, pthread_create, [LIBGC_LDADD="$LIBGC_LDADD -lpthread"]) + +AC_CHECK_HEADER([gc.h], + [ dnl See if we can link in the gc library. + dnl If we have found the dl and/or pthread library as well, also use it. + dnl If the gc library was not found, clear LIBGC_LDADD. + AC_CHECK_LIB(gc, GC_malloc, + [LIBGC_LDADD="$LIBGC_LDADD -lgc"], + [LIBGC_LDADD=""], [$LIBGC_LDADD])], + [ LIBGC_LDADD=""]) + + +LIBS="$save_LIBS" +LDFLAGS="$save_LDFLAGS" +CPPFLAGS="$save_CPPFLAGS" + +if test "x$LIBGC_LDADD" = "x"; then + AC_MSG_WARN([Unable to find the Hans Boehm garbage collector. + Please go get it from + http://www.hpl.hp.com/personal/Hans_Boehm/gc/ + (Compilation will use memory allocation only strategy instead.)]) + AC_DEFINE(HAVE_GC, 0, [Define if you use garbage collection]) +fi +if test "x$LIBGC_LDADD" != "x"; then + AC_DEFINE(HAVE_GC, 1, [Define if you use garbage collection]) +fi + + +dnl Propagate the variable to the Makefiles +AC_SUBST(LIBGC_CFLAGS, $LIBGC_CFLAGS) +AC_SUBST(LIBGC_LIBS, $LIBGC_LIBS) +AC_SUBST(LIBGC_LDADD, $LIBGC_LDADD) + # have_pftijah=no # AM_CONDITIONAL(HAVE_PFTIJAH, test "x$have_pftijah" == xyes) ------------------------------------------------------------------------- Take Surveys. Earn Cash. Influence the Future of IT Join SourceForge.net's Techsay panel and you'll get the chance to share your opinions on IT & business topics through brief surveys - and earn cash http://www.techsay.com/default.php?page=join.php&p=sourceforge&CID=DEVDEV _______________________________________________ Monetdb-pf-checkins mailing list Monetdb-pf-checkins@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/monetdb-pf-checkins