X-Git-Url: http://git.megacz.com/?a=blobdiff_plain;f=includes%2Frts%2FConstants.h;h=0aee60aa83c18fed3c0b2a20330b1a2e6e20a6fc;hb=e87df67d6467653567482f25910de95077924555;hp=8ebe16a6626616a38de8f78911b92d266ea2e622;hpb=d2c874dc74e2d99eda70d83e9b540f54c45c2154;p=ghc-hetmet.git

diff --git a/includes/rts/Constants.h b/includes/rts/Constants.h
index 8ebe16a..0aee60a 100644
--- a/includes/rts/Constants.h
+++ b/includes/rts/Constants.h
@@ -66,6 +66,13 @@
 #define MAX_CHARLIKE		255
 #define MIN_CHARLIKE		0
 
+/* Each byte in the card table for an StgMutaArrPtrs covers
+ * (1<<MUT_ARR_PTRS_CARD_BITS) elements in the array.  To find a good
+ * value for this, I used the benchmarks nofib/gc/hash,
+ * nofib/gc/graph, and nofib/gc/gc_bench.
+ */
+#define MUT_ARR_PTRS_CARD_BITS 7
+
 /* -----------------------------------------------------------------------------
    STG Registers.