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1dbecd464f
At 3840x2160 the targets moved in 16 presents hold 3.1 GiB, which a 16 GiB card does not have beside the 10 GiB of a town. A mark reaches its entry within three frames of the draw (four read-back copies, one every four submissions), so eight presents without a stamp are enough there. The early drop waits four times that: at ten presents it took the images the reuse was about to hand on (7,301 dropped, 7,672 made, 5,226 reused in one run); at 32 the same run made 3,338 and reused 8,004. The walk from the bug capture at 3840x2160 with the budget taken as 13.2 GiB, a 16 GiB card's: 10.9 to 11.4 GiB in use, at most 1.6 GiB of released targets, no image that could not be made and none in system memory. A player's log from such a card at that size had 12.2 GiB of released targets and 22.2 GiB in use at 2 frames a second. Without the budget, at 3416x1440: 10.0 to 10.7 GiB, as before this change. Co-Authored-By: Claude Fable 5.2 <noreply@anthropic.com>
1.6 KiB
1.6 KiB
Fixed
- Video memory no longer fills up while the camera moves (by epicmeme546). The game lays its render targets out anew in every frame, one behind the other in one block of memory. One of them, a shadow map, changes its size with the view (1141x1141 to 1917x1917 in Kokiri Forest, a texel or two a frame), and every target behind it then lies at a new address in each frame. A moved target should take over the image of the one it replaces, but that image counted as in use for as long as the game had not recycled the old target's texture object, so every frame got about a dozen new images and each old one stayed for 120 frames or more: 6.7 GiB of them at 3416x1440 and 12.2 GiB at 3840x2160, on top of the 10 GiB the area needs. A 20 GiB card ran full twice in five minutes of Kokiri Forest (images that could not be made, 4 frames a second, then the game ended) and a 16 GiB card in Castle Town (images in system memory, 2 frames a second). An image that another target was drawn over now goes to the next target of its size once nothing has drawn with it or sampled it for 16 frames, or for 8 once the card is past 80 % of its memory, where such images are also freed after 32 frames instead of ten seconds. Walking 28 metres from a save in Kokiri Forest and then around it at 3416x1440: 15.9 GiB of video memory in use before and 14 GiB again on each lap; 9.7 to 10.7 GiB now, with at most 2.2 GiB of released targets where there were 6.9 GiB, and 3,609 images made in the run where there were 6,970. The same walk at 3840x2160 with the memory budget of a 16 GiB card: 10.9 to 11.4 GiB, at most 1.6 GiB of them released.