*
* ---------------------------------------------------------------------------*/
+#include "PosixSource.h"
#include "Rts.h"
-#include "RtsFlags.h"
+
+#include "BlockAlloc.h"
#include "Storage.h"
#include "GC.h"
#include "GCThread.h"
+#include "GCTDecl.h"
#include "GCUtils.h"
#include "Printer.h"
#include "Trace.h"
+#ifdef THREADED_RTS
+#include "WSDeque.h"
+#endif
#ifdef THREADED_RTS
SpinLock gc_alloc_block_sync;
return bd;
}
+static bdescr *
+allocGroup_sync(nat n)
+{
+ bdescr *bd;
+ ACQUIRE_SPIN_LOCK(&gc_alloc_block_sync);
+ bd = allocGroup(n);
+ RELEASE_SPIN_LOCK(&gc_alloc_block_sync);
+ return bd;
+}
+
#if 0
static void
-------------------------------------------------------------------------- */
bdescr *
-grab_todo_block (step_workspace *ws)
+grab_local_todo_block (gen_workspace *ws)
{
bdescr *bd;
- step *stp;
+ generation *gen;
+
+ gen = ws->gen;
- stp = ws->step;
- bd = NULL;
+ bd = ws->todo_overflow;
+ if (bd != NULL)
+ {
+ ws->todo_overflow = bd->link;
+ bd->link = NULL;
+ ws->n_todo_overflow--;
+ return bd;
+ }
- if (ws->buffer_todo_bd)
+ bd = popWSDeque(ws->todo_q);
+ if (bd != NULL)
{
- bd = ws->buffer_todo_bd;
ASSERT(bd->link == NULL);
- ws->buffer_todo_bd = NULL;
return bd;
}
- ACQUIRE_SPIN_LOCK(&stp->sync_todo);
- if (stp->todos) {
- bd = stp->todos;
- if (stp->todos == stp->todos_last) {
- stp->todos_last = NULL;
+ return NULL;
+}
+
+#if defined(THREADED_RTS)
+bdescr *
+steal_todo_block (nat g)
+{
+ nat n;
+ bdescr *bd;
+
+ // look for work to steal
+ for (n = 0; n < n_gc_threads; n++) {
+ if (n == gct->thread_index) continue;
+ bd = stealWSDeque(gc_threads[n]->gens[g].todo_q);
+ if (bd) {
+ return bd;
}
- stp->todos = bd->link;
- stp->n_todos--;
- bd->link = NULL;
- }
- RELEASE_SPIN_LOCK(&stp->sync_todo);
- return bd;
+ }
+ return NULL;
}
+#endif
void
-push_scanned_block (bdescr *bd, step_workspace *ws)
+push_scanned_block (bdescr *bd, gen_workspace *ws)
{
ASSERT(bd != NULL);
ASSERT(bd->link == NULL);
- ASSERT(bd->step == ws->step);
+ ASSERT(bd->gen == ws->gen);
ASSERT(bd->u.scan == bd->free);
- if (bd->start + BLOCK_SIZE_W - bd->free > WORK_UNIT_WORDS)
+ if (bd->start + bd->blocks * BLOCK_SIZE_W - bd->free > WORK_UNIT_WORDS)
{
// a partially full block: put it on the part_list list.
bd->link = ws->part_list;
ws->part_list = bd;
- ws->n_part_blocks++;
+ ws->n_part_blocks += bd->blocks;
IF_DEBUG(sanity,
ASSERT(countBlocks(ws->part_list) == ws->n_part_blocks));
}
// put the scan block on the ws->scavd_list.
bd->link = ws->scavd_list;
ws->scavd_list = bd;
- ws->n_scavd_blocks ++;
+ ws->n_scavd_blocks += bd->blocks;
IF_DEBUG(sanity,
ASSERT(countBlocks(ws->scavd_list) == ws->n_scavd_blocks));
}
}
StgPtr
-todo_block_full (nat size, step_workspace *ws)
+todo_block_full (nat size, gen_workspace *ws)
{
+ StgPtr p;
bdescr *bd;
+ // todo_free has been pre-incremented by Evac.c:alloc_for_copy(). We
+ // are expected to leave it bumped when we've finished here.
+ ws->todo_free -= size;
+
bd = ws->todo_bd;
ASSERT(bd != NULL);
ASSERT(bd->link == NULL);
- ASSERT(bd->step == ws->step);
+ ASSERT(bd->gen == ws->gen);
// If the global list is not empty, or there's not much work in
// this block to push, and there's enough room in
// this block to evacuate the current object, then just increase
// the limit.
- if (ws->step->todos != NULL ||
+ if (!looksEmptyWSDeque(ws->todo_q) ||
(ws->todo_free - bd->u.scan < WORK_UNIT_WORDS / 2)) {
- if (ws->todo_free + size < bd->start + BLOCK_SIZE_W) {
- ws->todo_lim = stg_min(bd->start + BLOCK_SIZE_W,
+ if (ws->todo_free + size < bd->start + bd->blocks * BLOCK_SIZE_W) {
+ ws->todo_lim = stg_min(bd->start + bd->blocks * BLOCK_SIZE_W,
ws->todo_lim + stg_max(WORK_UNIT_WORDS,size));
debugTrace(DEBUG_gc, "increasing limit for %p to %p", bd->start, ws->todo_lim);
- return ws->todo_free;
+ p = ws->todo_free;
+ ws->todo_free += size;
+ return p;
}
}
// Otherwise, push this block out to the global list.
else
{
- step *stp;
- stp = ws->step;
- trace(TRACE_gc|DEBUG_gc, "push todo block %p (%d words), step %d, n_todos: %d",
- bd->start, bd->free - bd->u.scan, stp->abs_no, stp->n_todos);
- // ToDo: use buffer_todo
- ACQUIRE_SPIN_LOCK(&stp->sync_todo);
- if (stp->todos_last == NULL) {
- stp->todos_last = bd;
- stp->todos = bd;
- } else {
- stp->todos_last->link = bd;
- stp->todos_last = bd;
+ generation *gen;
+ gen = ws->gen;
+ debugTrace(DEBUG_gc, "push todo block %p (%ld words), step %d, todo_q: %ld",
+ bd->start, (unsigned long)(bd->free - bd->u.scan),
+ gen->no, dequeElements(ws->todo_q));
+
+ if (!pushWSDeque(ws->todo_q, bd)) {
+ bd->link = ws->todo_overflow;
+ ws->todo_overflow = bd;
+ ws->n_todo_overflow++;
}
- stp->n_todos++;
- RELEASE_SPIN_LOCK(&stp->sync_todo);
}
}
alloc_todo_block(ws, size);
- return ws->todo_free;
+ p = ws->todo_free;
+ ws->todo_free += size;
+ return p;
}
StgPtr
-alloc_todo_block (step_workspace *ws, nat size)
+alloc_todo_block (gen_workspace *ws, nat size)
{
- bdescr *bd/*, *hd, *tl*/;
+ bdescr *bd/*, *hd, *tl */;
// Grab a part block if we have one, and it has enough room
- if (ws->part_list != NULL &&
- ws->part_list->start + BLOCK_SIZE_W - ws->part_list->free > (int)size)
+ bd = ws->part_list;
+ if (bd != NULL &&
+ bd->start + bd->blocks * BLOCK_SIZE_W - bd->free > (int)size)
{
- bd = ws->part_list;
ws->part_list = bd->link;
- ws->n_part_blocks--;
+ ws->n_part_blocks -= bd->blocks;
}
else
{
// blocks in to-space get the BF_EVACUATED flag.
-// allocBlocks_sync(4, &hd, &tl,
+// allocBlocks_sync(16, &hd, &tl,
// ws->step->gen_no, ws->step, BF_EVACUATED);
//
// tl->link = ws->part_list;
// ws->part_list = hd->link;
-// ws->n_part_blocks += 3;
+// ws->n_part_blocks += 15;
//
// bd = hd;
- bd = allocBlock_sync();
- bd->step = ws->step;
- bd->gen_no = ws->step->gen_no;
+ if (size > BLOCK_SIZE_W) {
+ bd = allocGroup_sync((lnat)BLOCK_ROUND_UP(size*sizeof(W_))
+ / BLOCK_SIZE);
+ } else {
+ bd = allocBlock_sync();
+ }
+ initBdescr(bd, ws->gen, ws->gen->to);
bd->flags = BF_EVACUATED;
bd->u.scan = bd->free = bd->start;
}
ws->todo_bd = bd;
ws->todo_free = bd->free;
- ws->todo_lim = stg_min(bd->start + BLOCK_SIZE_W,
+ ws->todo_lim = stg_min(bd->start + bd->blocks * BLOCK_SIZE_W,
bd->free + stg_max(WORK_UNIT_WORDS,size));
- debugTrace(DEBUG_gc, "alloc new todo block %p for step %d",
- bd->free, ws->step->abs_no);
+ debugTrace(DEBUG_gc, "alloc new todo block %p for gen %d",
+ bd->free, ws->gen->no);
return ws->todo_free;
}
#if DEBUG
void
-printMutableList(generation *gen)
+printMutableList(bdescr *bd)
{
- bdescr *bd;
StgPtr p;
- debugBelch("mutable list %p: ", gen->mut_list);
+ debugBelch("mutable list %p: ", bd);
- for (bd = gen->mut_list; bd != NULL; bd = bd->link) {
+ for (; bd != NULL; bd = bd->link) {
for (p = bd->start; p < bd->free; p++) {
debugBelch("%p (%s), ", (void *)*p, info_type((StgClosure *)*p));
}
projects / ghc-hetmet.git / blobdiff