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authorUlrich Drepper <drepper@redhat.com>2007-05-15 01:51:37 +0000
committerUlrich Drepper <drepper@redhat.com>2007-05-15 01:51:37 +0000
commit1d47e92f71c36165364c8807e52d0d0dc0f66142 (patch)
treef490f6d01ba99f264e3cf93d11277bffab95d45b /malloc
parent1a31b586c458d13af63cc116013bb0aba91498b5 (diff)
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* malloc/malloc.c: Use all small bin slots on 64-bit archs.
* malloc/malloc.c (largebin_index): Really have 32 buckets with 64 sizes.
Diffstat (limited to 'malloc')
-rw-r--r--malloc/malloc.c23
1 files changed, 19 insertions, 4 deletions
diff --git a/malloc/malloc.c b/malloc/malloc.c
index 1e586faa2a..e061db94d6 100644
--- a/malloc/malloc.c
+++ b/malloc/malloc.c
@@ -2125,15 +2125,16 @@ typedef struct malloc_chunk* mbinptr;
#define NBINS 128
#define NSMALLBINS 64
-#define SMALLBIN_WIDTH 8
-#define MIN_LARGE_SIZE 512
+#define SMALLBIN_WIDTH MALLOC_ALIGNMENT
+#define MIN_LARGE_SIZE (NSMALLBINS * SMALLBIN_WIDTH)
#define in_smallbin_range(sz) \
((unsigned long)(sz) < (unsigned long)MIN_LARGE_SIZE)
-#define smallbin_index(sz) (((unsigned)(sz)) >> 3)
+#define smallbin_index(sz) \
+ (SMALLBIN_WIDTH == 16 ? (((unsigned)(sz)) >> 4) : (((unsigned)(sz)) >> 3))
-#define largebin_index(sz) \
+#define largebin_index_32(sz) \
(((((unsigned long)(sz)) >> 6) <= 38)? 56 + (((unsigned long)(sz)) >> 6): \
((((unsigned long)(sz)) >> 9) <= 20)? 91 + (((unsigned long)(sz)) >> 9): \
((((unsigned long)(sz)) >> 12) <= 10)? 110 + (((unsigned long)(sz)) >> 12): \
@@ -2141,6 +2142,20 @@ typedef struct malloc_chunk* mbinptr;
((((unsigned long)(sz)) >> 18) <= 2)? 124 + (((unsigned long)(sz)) >> 18): \
126)
+// XXX It remains to be seen whether it is good to keep the widths of
+// XXX the buckets the same or whether it should be scaled by a factor
+// XXX of two as well.
+#define largebin_index_64(sz) \
+(((((unsigned long)(sz)) >> 6) <= 48)? 48 + (((unsigned long)(sz)) >> 6): \
+ ((((unsigned long)(sz)) >> 9) <= 20)? 91 + (((unsigned long)(sz)) >> 9): \
+ ((((unsigned long)(sz)) >> 12) <= 10)? 110 + (((unsigned long)(sz)) >> 12): \
+ ((((unsigned long)(sz)) >> 15) <= 4)? 119 + (((unsigned long)(sz)) >> 15): \
+ ((((unsigned long)(sz)) >> 18) <= 2)? 124 + (((unsigned long)(sz)) >> 18): \
+ 126)
+
+#define largebin_index(sz) \
+ (SIZE_SZ == 8 ? largebin_index_64 (sz) : largebin_index_32 (sz))
+
#define bin_index(sz) \
((in_smallbin_range(sz)) ? smallbin_index(sz) : largebin_index(sz))