nat alloc_blocks_lim; /* GC if n_large_blocks in any nursery
* reaches this. */
-static bdescr *exec_block;
+bdescr *exec_block;
generation *generations = NULL; /* all the generations */
generation *g0 = NULL; /* generation 0, for convenience */
ullong total_allocated = 0; /* total memory allocated during run */
-nat n_nurseries = 0; /* == RtsFlags.ParFlags.nNodes, convenience */
-step *nurseries = NULL; /* array of nurseries, >1 only if THREADED_RTS */
+step *nurseries = NULL; /* array of nurseries, size == n_capabilities */
#ifdef THREADED_RTS
/*
g0->steps = all_steps;
}
- n_nurseries = n_capabilities;
- nurseries = stgMallocBytes (n_nurseries * sizeof(struct step_),
+ nurseries = stgMallocBytes (n_capabilities * sizeof(struct step_),
"initStorage: nurseries");
/* Initialise all steps */
}
}
- for (s = 0; s < n_nurseries; s++) {
+ for (s = 0; s < n_capabilities; s++) {
initStep(&nurseries[s], 0, s);
}
}
oldest_gen->steps[0].to = &oldest_gen->steps[0];
- for (s = 0; s < n_nurseries; s++) {
+ for (s = 0; s < n_capabilities; s++) {
nurseries[s].to = generations[0].steps[0].to;
}
{
nat i;
- for (i = 0; i < n_nurseries; i++) {
+ for (i = 0; i < n_capabilities; i++) {
capabilities[i].r.rNursery = &nurseries[i];
capabilities[i].r.rCurrentNursery = nurseries[i].blocks;
capabilities[i].r.rCurrentAlloc = NULL;
{
nat i;
- for (i = 0; i < n_nurseries; i++) {
+ for (i = 0; i < n_capabilities; i++) {
nurseries[i].blocks =
allocNursery(&nurseries[i], NULL,
RtsFlags.GcFlags.minAllocAreaSize);
bdescr *bd;
step *stp;
- for (i = 0; i < n_nurseries; i++) {
+ for (i = 0; i < n_capabilities; i++) {
stp = &nurseries[i];
for (bd = stp->blocks; bd; bd = bd->link) {
bd->free = bd->start;
nat i;
lnat blocks = 0;
- for (i = 0; i < n_nurseries; i++) {
+ for (i = 0; i < n_capabilities; i++) {
blocks += nurseries[i].n_blocks;
blocks += nurseries[i].n_large_blocks;
}
resizeNurseriesFixed (nat blocks)
{
nat i;
- for (i = 0; i < n_nurseries; i++) {
+ for (i = 0; i < n_capabilities; i++) {
resizeNursery(&nurseries[i], blocks);
}
}
{
// If there are multiple nurseries, then we just divide the number
// of available blocks between them.
- resizeNurseriesFixed(blocks / n_nurseries);
+ resizeNurseriesFixed(blocks / n_capabilities);
}
*
* Approximate how much we've allocated: number of blocks in the
* nursery + blocks allocated via allocate() - unused nusery blocks.
- * This leaves a little slop at the end of each block, and doesn't
- * take into account large objects (ToDo).
+ * This leaves a little slop at the end of each block.
* -------------------------------------------------------------------------- */
lnat
#endif /* mingw32_HOST_OS */
-/* -----------------------------------------------------------------------------
- Debugging
-
- memInventory() checks for memory leaks by counting up all the
- blocks we know about and comparing that to the number of blocks
- allegedly floating around in the system.
- -------------------------------------------------------------------------- */
-
#ifdef DEBUG
-// Useful for finding partially full blocks in gdb
-void findSlop(bdescr *bd);
-void findSlop(bdescr *bd)
-{
- lnat slop;
-
- for (; bd != NULL; bd = bd->link) {
- slop = (bd->blocks * BLOCK_SIZE_W) - (bd->free - bd->start);
- if (slop > (1024/sizeof(W_))) {
- debugBelch("block at %p (bdescr %p) has %ldKB slop\n",
- bd->start, bd, slop / (1024/sizeof(W_)));
- }
- }
-}
-
-nat
-countBlocks(bdescr *bd)
-{
- nat n;
- for (n=0; bd != NULL; bd=bd->link) {
- n += bd->blocks;
- }
- return n;
-}
-
-// (*1) Just like countBlocks, except that we adjust the count for a
-// megablock group so that it doesn't include the extra few blocks
-// that would be taken up by block descriptors in the second and
-// subsequent megablock. This is so we can tally the count with the
-// number of blocks allocated in the system, for memInventory().
-static nat
-countAllocdBlocks(bdescr *bd)
-{
- nat n;
- for (n=0; bd != NULL; bd=bd->link) {
- n += bd->blocks;
- // hack for megablock groups: see (*1) above
- if (bd->blocks > BLOCKS_PER_MBLOCK) {
- n -= (MBLOCK_SIZE / BLOCK_SIZE - BLOCKS_PER_MBLOCK)
- * (bd->blocks/(MBLOCK_SIZE/BLOCK_SIZE));
- }
- }
- return n;
-}
-
-static lnat
-stepBlocks (step *stp)
-{
- ASSERT(countBlocks(stp->blocks) == stp->n_blocks);
- ASSERT(countBlocks(stp->large_objects) == stp->n_large_blocks);
- return stp->n_blocks + stp->n_old_blocks +
- countAllocdBlocks(stp->large_objects);
-}
-
-// If memInventory() calculates that we have a memory leak, this
-// function will try to find the block(s) that are leaking by marking
-// all the ones that we know about, and search through memory to find
-// blocks that are not marked. In the debugger this can help to give
-// us a clue about what kind of block leaked. In the future we might
-// annotate blocks with their allocation site to give more helpful
-// info.
-static void
-findMemoryLeak (void)
-{
- nat g, s, i;
- for (g = 0; g < RtsFlags.GcFlags.generations; g++) {
- for (i = 0; i < n_capabilities; i++) {
- markBlocks(capabilities[i].mut_lists[g]);
- }
- markBlocks(generations[g].mut_list);
- for (s = 0; s < generations[g].n_steps; s++) {
- markBlocks(generations[g].steps[s].blocks);
- markBlocks(generations[g].steps[s].large_objects);
- }
- }
-
- for (i = 0; i < n_nurseries; i++) {
- markBlocks(nurseries[i].blocks);
- markBlocks(nurseries[i].large_objects);
- }
-
-#ifdef PROFILING
- // TODO:
- // if (RtsFlags.ProfFlags.doHeapProfile == HEAP_BY_RETAINER) {
- // markRetainerBlocks();
- // }
-#endif
-
- // count the blocks allocated by the arena allocator
- // TODO:
- // markArenaBlocks();
-
- // count the blocks containing executable memory
- markBlocks(exec_block);
-
- reportUnmarkedBlocks();
-}
-
-
-void
-memInventory (rtsBool show)
-{
- nat g, s, i;
- step *stp;
- lnat gen_blocks[RtsFlags.GcFlags.generations];
- lnat nursery_blocks, retainer_blocks,
- arena_blocks, exec_blocks;
- lnat live_blocks = 0, free_blocks = 0;
- rtsBool leak;
-
- // count the blocks we current have
-
- for (g = 0; g < RtsFlags.GcFlags.generations; g++) {
- gen_blocks[g] = 0;
- for (i = 0; i < n_capabilities; i++) {
- gen_blocks[g] += countBlocks(capabilities[i].mut_lists[g]);
- }
- gen_blocks[g] += countAllocdBlocks(generations[g].mut_list);
- for (s = 0; s < generations[g].n_steps; s++) {
- stp = &generations[g].steps[s];
- gen_blocks[g] += stepBlocks(stp);
- }
- }
-
- nursery_blocks = 0;
- for (i = 0; i < n_nurseries; i++) {
- nursery_blocks += stepBlocks(&nurseries[i]);
- }
-
- retainer_blocks = 0;
-#ifdef PROFILING
- if (RtsFlags.ProfFlags.doHeapProfile == HEAP_BY_RETAINER) {
- retainer_blocks = retainerStackBlocks();
- }
-#endif
-
- // count the blocks allocated by the arena allocator
- arena_blocks = arenaBlocks();
-
- // count the blocks containing executable memory
- exec_blocks = countAllocdBlocks(exec_block);
-
- /* count the blocks on the free list */
- free_blocks = countFreeList();
-
- live_blocks = 0;
- for (g = 0; g < RtsFlags.GcFlags.generations; g++) {
- live_blocks += gen_blocks[g];
- }
- live_blocks += nursery_blocks +
- + retainer_blocks + arena_blocks + exec_blocks;
-
-#define MB(n) (((n) * BLOCK_SIZE_W) / ((1024*1024)/sizeof(W_)))
-
- leak = live_blocks + free_blocks != mblocks_allocated * BLOCKS_PER_MBLOCK;
-
- if (show || leak)
- {
- if (leak) {
- debugBelch("Memory leak detected:\n");
- } else {
- debugBelch("Memory inventory:\n");
- }
- for (g = 0; g < RtsFlags.GcFlags.generations; g++) {
- debugBelch(" gen %d blocks : %5lu blocks (%lu MB)\n", g,
- gen_blocks[g], MB(gen_blocks[g]));
- }
- debugBelch(" nursery : %5lu blocks (%lu MB)\n",
- nursery_blocks, MB(nursery_blocks));
- debugBelch(" retainer : %5lu blocks (%lu MB)\n",
- retainer_blocks, MB(retainer_blocks));
- debugBelch(" arena blocks : %5lu blocks (%lu MB)\n",
- arena_blocks, MB(arena_blocks));
- debugBelch(" exec : %5lu blocks (%lu MB)\n",
- exec_blocks, MB(exec_blocks));
- debugBelch(" free : %5lu blocks (%lu MB)\n",
- free_blocks, MB(free_blocks));
- debugBelch(" total : %5lu blocks (%lu MB)\n",
- live_blocks + free_blocks, MB(live_blocks+free_blocks));
- if (leak) {
- debugBelch("\n in system : %5lu blocks (%lu MB)\n",
- mblocks_allocated * BLOCKS_PER_MBLOCK, mblocks_allocated);
- }
- }
-
- if (leak) {
- debugBelch("\n");
- findMemoryLeak();
- }
- ASSERT(n_alloc_blocks == live_blocks);
- ASSERT(!leak);
-}
-
-
// handy function for use in gdb, because Bdescr() is inlined.
extern bdescr *_bdescr( StgPtr p );
projects / ghc-hetmet.git / blobdiff