try multiple brt fanout's

git-svn-id: file:///svn/tokudb@197 c7de825b-a66e-492c-adef-691d508d4ae1

newbrt/Makefile

@@ -15,6 +15,10 @@ endif
 CFLAGS = -Wall -W $(OPTFLAGS) -g $(GCOV_FLAGS) $(PROF_FLAGS) -Werror $(FPICFLAGS)
 LDFLAGS = $(OPTFLAGS) -g $(GCOV_FLAGS) $(PROF_FLAGS) 
 
+ifdef BRT_FANOUT
+CPPFLAGS += -DBRT_FANOUT=$(BRT_FANOUT)
+endif
+
 
 # When debugging, try: valgrind --show-reachable=yes --leak-check=full ./brt-test
 
@@ -44,6 +48,13 @@ check: bins
 	$(DTOOL) ./hashtest
 #	./mdict-test
 
+check-fanout:
+	let BRT_FANOUT=4; \
+	while [ $$BRT_FANOUT -le 16 ] ;do \
+		make clean; make check BRT_FANOUT=$$BRT_FANOUT; \
+		let BRT_FANOUT=BRT_FANOUT+1; \
+	done
+
 # pma: PROF_FLAGS=-fprofile-arcs -ftest-coverage
 key.o: brttypes.h key.h
 pma-test.o: pma-internal.h pma.h yerror.h memory.h  ../include/ydb-constants.h

newbrt/brt-internal.h

@@ -6,7 +6,10 @@
 
 typedef long long diskoff;  /* Offset in a disk. -1 is the NULL pointer. */
 
-enum { TREE_FANOUT = 16 }; //, NODESIZE=1<<20 };
+#ifndef BRT_FANOUT
+#define BRT_FANOUT 16
+#endif
+enum { TREE_FANOUT = BRT_FANOUT }; //, NODESIZE=1<<20 };
 enum { KEY_VALUE_OVERHEAD = 8 }; /* Must store the two lengths. */
 struct nodeheader_in_file {
     int n_in_buffer;