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gallium/radeon: Merge holes when freeing virtual address space.

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Otherwise we'll likely end up with an ever increasing amount of ever smaller
holes.

Requires keeping the list ordered wrt offsets.

Signed-off-by: Michel Dänzer <michel.daenzer@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Michel Dänzer
2012-04-26 15:26:01 +02:00
committed by Michel Dänzer
parent c25968f3e2
commit 206d07625c
1 changed files with 38 additions and 7 deletions
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45
src/gallium/winsys/radeon/drm/radeon_drm_bo.c
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@@ -226,7 +226,7 @@ static uint64_t radeon_bomgr_find_va(struct radeon_bomgr *mgr, uint64_t size, ui
n = CALLOC_STRUCT(radeon_bo_va_hole);
n->size = waste;
n->offset = hole->offset;
list_add(&n->list, &mgr->va_holes);
list_add(&n->list, &hole->list);
}
hole->size -= (size + waste);
hole->offset += size + waste;
@@ -286,18 +286,49 @@ static void radeon_bomgr_free_va(struct radeon_bomgr *mgr, uint64_t va, uint64_t
if ((va + size) == mgr->va_offset) {
mgr->va_offset = va;
} else {
struct radeon_bo_va_hole *hole;
struct radeon_bo_va_hole *hole, *next;
hole = container_of(&mgr->va_holes, hole, list);
LIST_FOR_EACH_ENTRY(next, &mgr->va_holes, list) {
if (next->offset < va)
break;
hole = next;
}
if (&hole->list != &mgr->va_holes) {
/* Grow upper hole if it's adjacent */
if (hole->offset == (va + size)) {
hole->offset = va;
hole->size += size;
/* Merge lower hole if it's adjacent */
if (next != hole && &next->list != &mgr->va_holes &&
(next->offset + next->size) == va) {
next->size += hole->size;
list_del(&hole->list);
FREE(hole);
}
goto out;
}
}
/* Grow lower hole if it's adjacent */
if (next != hole && &next->list != &mgr->va_holes &&
(next->offset + next->size) == va) {
next->size += size;
goto out;
}
/* FIXME on allocation failure we just lose virtual address space
* maybe print a warning
*/
hole = CALLOC_STRUCT(radeon_bo_va_hole);
if (hole) {
hole->size = size;
hole->offset = va;
list_add(&hole->list, &mgr->va_holes);
next = CALLOC_STRUCT(radeon_bo_va_hole);
if (next) {
next->size = size;
next->offset = va;
list_add(&next->list, &hole->list);
}
}
out:
pipe_mutex_unlock(mgr->bo_va_mutex);
}