/* -----------------------------------------------------------------------------
- * $Id: GC.c,v 1.117 2001/08/08 13:45:02 simonmar Exp $
+ * $Id: GC.c,v 1.122 2001/08/30 10:22:52 simonmar Exp $
*
* (c) The GHC Team 1998-1999
*
*
* ---------------------------------------------------------------------------*/
+#include "PosixSource.h"
#include "Rts.h"
#include "RtsFlags.h"
#include "RtsUtils.h"
RtsFlags.GcFlags.minOldGenSize);
// minimum size for generation zero
- min_alloc = (RtsFlags.GcFlags.pcFreeHeap * max) / 200;
+ min_alloc = stg_max((RtsFlags.GcFlags.pcFreeHeap * max) / 200,
+ RtsFlags.GcFlags.minAllocAreaSize);
+
+ // Auto-enable compaction when the residency reaches a
+ // certain percentage of the maximum heap size (default: 30%).
+ if (RtsFlags.GcFlags.generations > 1 &&
+ (RtsFlags.GcFlags.compact ||
+ (max > 0 &&
+ oldest_gen->steps[0].n_blocks >
+ (RtsFlags.GcFlags.compactThreshold * max) / 100))) {
+ oldest_gen->steps[0].is_compacted = 1;
+// fprintf(stderr,"compaction: on\n", live);
+ } else {
+ oldest_gen->steps[0].is_compacted = 0;
+// fprintf(stderr,"compaction: off\n", live);
+ }
// if we're going to go over the maximum heap size, reduce the
// size of the generations accordingly. The calculation is
// different if compaction is turned on, because we don't need
// to double the space required to collect the old generation.
if (max != 0) {
- if (RtsFlags.GcFlags.compact) {
+ if (oldest_gen->steps[0].is_compacted) {
if ( (size + (size - 1) * (gens - 2) * 2) + min_alloc > max ) {
size = (max - min_alloc) / ((gens - 1) * 2 - 1);
}
for (g = 0; g < gens; g++) {
generations[g].max_blocks = size;
}
-
- // Auto-enable compaction when the residency reaches a
- // certain percentage of the maximum heap size (default: 30%).
- if (RtsFlags.GcFlags.compact &&
- max > 0 &&
- oldest_gen->steps[0].n_blocks >
- (RtsFlags.GcFlags.compactThreshold * max) / 100) {
- oldest_gen->steps[0].is_compacted = 1;
-// fprintf(stderr,"compaction: on\n", live);
- } else {
- oldest_gen->steps[0].is_compacted = 0;
-// fprintf(stderr,"compaction: off\n", live);
- }
}
// Guess the amount of live data for stats.
*/
blocks = g0s0->n_to_blocks;
- if ( blocks * RtsFlags.GcFlags.oldGenFactor * 2 >
- RtsFlags.GcFlags.maxHeapSize ) {
+ if ( RtsFlags.GcFlags.maxHeapSize != 0 &&
+ blocks * RtsFlags.GcFlags.oldGenFactor * 2 >
+ RtsFlags.GcFlags.maxHeapSize ) {
long adjusted_blocks; // signed on purpose
int pc_free;
bdescr *bd = Bdescr(p);
step *stp;
- // should point to the beginning of the block
- ASSERT(((W_)p & BLOCK_MASK) == 0);
-
+ // object must be at the beginning of the block (or be a ByteArray)
+ ASSERT(get_itbl((StgClosure *)p)->type == ARR_WORDS ||
+ (((W_)p & BLOCK_MASK) == 0));
+
// already evacuated?
if (bd->flags & BF_EVACUATED) {
/* Don't forget to set the failed_to_evac flag if we didn't get