[PATCH 2/2] ntdll: Use the free ranges in find_reserved_free_area.
Rémi Bernon
rbernon at codeweavers.com
Fri Apr 10 04:55:38 CDT 2020
Instead of the view rbtree.
Testing shows a 20% FPS increase in We Happy Few, from 80-100fps to
100-120fps right after starting a new game.
Signed-off-by: Rémi Bernon <rbernon at codeweavers.com>
---
dlls/ntdll/virtual.c | 45 +++++++++++++++++++++++---------------------
1 file changed, 24 insertions(+), 21 deletions(-)
diff --git a/dlls/ntdll/virtual.c b/dlls/ntdll/virtual.c
index 3740d1a4457..851b8f17ff0 100644
--- a/dlls/ntdll/virtual.c
+++ b/dlls/ntdll/virtual.c
@@ -783,40 +783,43 @@ static void *map_free_area( void *base, void *end, size_t size, size_t mask, int
*/
static void *find_reserved_free_area( void *base, void *end, size_t size, size_t mask, int top_down )
{
- struct wine_rb_entry *first = find_view_inside_range( &base, &end, top_down );
+ struct range_entry *range;
void *start;
+ base = ROUND_ADDR( (char *)base + mask, mask );
+ end = (char *)ROUND_ADDR( (char *)end - size, mask ) + size;
+
if (top_down)
{
- start = ROUND_ADDR( (char *)end - size, mask );
- if (start >= end || start < base) return NULL;
+ start = (char *)end - size;
+ range = free_ranges_lower_bound( start );
+ assert(range != free_ranges_end && range->end >= start);
- while (first)
+ if ((char *)range->end - (char *)start < size) start = ROUND_ADDR( (char *)range->end - size, mask );
+ do
{
- struct file_view *view = WINE_RB_ENTRY_VALUE( first, struct file_view, entry );
-
- if ((char *)view->base + view->size <= (char *)start) break;
- start = ROUND_ADDR( (char *)view->base - size, mask );
- /* stop if remaining space is not large enough */
- if (!start || start >= end || start < base) return NULL;
- first = wine_rb_prev( first );
+ if (start >= end || start < base || (char *)end - (char *)start < size) return NULL;
+ if (start < range->end && start >= range->base && (char *)range->end - (char *)start >= size) break;
+ if (--range < free_ranges) return NULL;
+ start = ROUND_ADDR( (char *)range->end - size, mask );
}
+ while (1);
}
else
{
- start = ROUND_ADDR( (char *)base + mask, mask );
- if (!start || start >= end || (char *)end - (char *)start < size) return NULL;
+ start = base;
+ range = free_ranges_lower_bound( start );
+ assert(range != free_ranges_end && range->end >= start);
- while (first)
+ if (start < range->base) start = ROUND_ADDR( (char *)range->base + mask, mask );
+ do
{
- struct file_view *view = WINE_RB_ENTRY_VALUE( first, struct file_view, entry );
-
- if ((char *)view->base >= (char *)start + size) break;
- start = ROUND_ADDR( (char *)view->base + view->size + mask, mask );
- /* stop if remaining space is not large enough */
- if (!start || start >= end || (char *)end - (char *)start < size) return NULL;
- first = wine_rb_next( first );
+ if (start >= end || start < base || (char *)end - (char *)start < size) return NULL;
+ if (start < range->end && start >= range->base && (char *)range->end - (char *)start >= size) break;
+ if (++range == free_ranges_end) return NULL;
+ start = ROUND_ADDR( (char *)range->base + mask, mask );
}
+ while (1);
}
return start;
}
--
2.26.0
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