From: "Xiong, James" <james.xi...@intel.com> With the current implementation, brw_bufmgr may round up a request size to the next bucket size, result in 25% more memory allocated in the worst senario. For example: Request size Actual size 32KB+1Byte 40KB . 8MB+1Byte 10MB . 96MB+1Byte 112MB This series align the buffer size up to page instead of a bucket size to improve memory allocation efficiency.
Performance and memory usage were measured on a gen9 platform using Basemark ES3, GfxBench 4 and 5, each test case ran 6 times. Basemark ES3 score peak memory size(KB) before after diff before after diff max avg max avg max avg 22 21 23 21 2.83% 1.21% 409928 395573 -14355 20 20 20 20 0.53% 0.41% GfxBench 4.0 scorepeak memory size(KB) score peak memory size(KB) before after diff before after diff max avg max avg max avg 584 577 586 583 0.45% 1.02% 566489 539699 -26791 728 727 727 726 -0.03% -0.16% 614730 586794 -27936 1604 1144 1650 1202 2.81% 4.86% 439220 411596 -27624 2711 2222 2718 2152 0.25% -3.25% 126065 121398 -4667 1218 1213 1212 1154 -0.53% -5.10% 54153 53868 -285 106 104 106 103 0.85% -1.66% 12730 12666 -64 1732 1709 1740 1728 0.49% 1.11% 475716 447726 -27990 3051 2969 3066 3047 0.50% 2.55% 154169 148962 -5207 2626 2607 2626 2625 0.00% 0.70% 84119 83150 -969 211 208 208 205 -1.26% -1.21% 39924 39667 -257 GfxBench 5.0 score peak memory size(KB) before after diff before after diff max avg max avg max avg 260 258 259 256 -0.39% -0.85% 1111037 1013520 -97517 298 295 298 297 0.00% 0.45% 1143593 1040844 -102749 Xiong, James (4): i965/drm: Reorganize code for the next patch i965/drm: Round down buffer size and calculate the bucket index i965/drm: Searching for a cached buffer for reuse i965/drm: Purge the bucket when its cached buffer is evicted src/mesa/drivers/dri/i965/brw_bufmgr.c | 139 ++++++++++++++++++--------------- src/util/list.h | 5 ++ 2 files changed, 79 insertions(+), 65 deletions(-) -- 2.7.4 _______________________________________________ mesa-dev mailing list mesa-dev@lists.freedesktop.org https://lists.freedesktop.org/mailman/listinfo/mesa-dev
