diff options
| author |  commit-bot@chromium.org <commit-bot@chromium.org@2bbb7eff-a529-9590-31e7-b0007b416f81> | 2014-01-13 08:16:45 +0000 |
|---|---|---|
| committer | commit-bot@chromium.org <commit-bot@chromium.org@2bbb7eff-a529-9590-31e7-b0007b416f81> | 2014-01-13 08:16:45 +0000 |
| commit | c45ece5f7f53e2d1dacfe71d407ff495dfdc0f58 (patch) | |
| tree | 325293a285e9d987f5e611dc64660d593ef1cb63 /bench/BlurImageFilterBench.cpp | |
| parent | 1b3fea7172457f26fb8dd72f0ea59eedba920133 (diff) | |
NEON fast path for box blur
Calculate 8 channels in parallel by using 16-bits to store each channel. Due to the limitation of VQRDMULH, (int16 * int16 * 2 + 0x8000) >> 16, the fast path can only support kernelSize < 128.
8 significant bits are kept at least in each stage, the final error should less-equal than 1.
Pre-fetching memory for X-direction read. In fact pre-fetching memory doesn't help much for Y direction read, since it is a waste to load a cache line for only read 8 bytes.(I left it there to keep the symmetry. pre-fetch is cheap :) )
bench data on Nexus 10
before:
running bench [640 480] blur_image_filter_large_10.00_10.00 8888: cmsecs = 25081.48
running bench [640 480] blur_image_filter_small_10.00_10.00 8888: cmsecs = 25038.04
running bench [640 480] blur_image_filter_large_1.00_1.00 8888: cmsecs = 25209.04
running bench [640 480] blur_image_filter_small_1.00_1.00 8888: cmsecs = 24928.01
running bench [640 480] blur_image_filter_large_0.00_1.00 8888: cmsecs = 17160.98
running bench [640 480] blur_image_filter_large_0.00_10.00 8888: cmsecs = 17924.11
running bench [640 480] blur_image_filter_large_1.00_0.00 8888: cmsecs = 14609.19
running bench [640 480] blur_image_filter_large_10.00_0.00 8888: cmsecs = 14625.91
after:
running bench [640 480] blur_image_filter_large_10.00_10.00 8888: cmsecs = 14848.42
running bench [640 480] blur_image_filter_small_10.00_10.00 8888: cmsecs = 16037.29
running bench [640 480] blur_image_filter_large_1.00_1.00 8888: cmsecs = 14819.55
running bench [640 480] blur_image_filter_small_1.00_1.00 8888: cmsecs = 14563.69
running bench [640 480] blur_image_filter_large_0.00_1.00 8888: cmsecs = 11905.34
running bench [640 480] blur_image_filter_large_0.00_10.00 8888: cmsecs = 11883.85
running bench [640 480] blur_image_filter_large_1.00_0.00 8888: cmsecs = 9576.51
running bench [640 480] blur_image_filter_large_10.00_0.00 8888: cmsecs = 9793.84
BUG=
R=senorblanco@chromium.org, mtklein@google.com, reed@google.com, kevin.petit@arm.com, kevin.petit.arm@gmail.com
Author: zheng.xu@arm.com
Review URL: https://codereview.chromium.org/105893003
git-svn-id: http://skia.googlecode.com/svn/trunk@13036 2bbb7eff-a529-9590-31e7-b0007b416f81
Diffstat (limited to 'bench/BlurImageFilterBench.cpp')
| -rw-r--r-- | bench/BlurImageFilterBench.cpp | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/bench/BlurImageFilterBench.cpp b/bench/BlurImageFilterBench.cpp index c39573d8e8..1cc205a70c 100644 --- a/bench/BlurImageFilterBench.cpp +++ b/bench/BlurImageFilterBench.cpp @@ -20,6 +20,7 @@ #define FILTER_HEIGHT_LARGE 256 #define BLUR_SIGMA_SMALL 1.0f #define BLUR_SIGMA_LARGE 10.0f +#define BLUR_SIGMA_HUGE 80.0f class BlurImageFilterBench : public SkBenchmark { public: @@ -92,3 +93,5 @@ DEF_BENCH(return new BlurImageFilterBench(BLUR_SIGMA_SMALL, BLUR_SIGMA_SMALL, tr DEF_BENCH(return new BlurImageFilterBench(BLUR_SIGMA_SMALL, BLUR_SIGMA_SMALL, false);) DEF_BENCH(return new BlurImageFilterBench(BLUR_SIGMA_LARGE, BLUR_SIGMA_LARGE, true);) DEF_BENCH(return new BlurImageFilterBench(BLUR_SIGMA_LARGE, BLUR_SIGMA_LARGE, false);) +DEF_BENCH(return new BlurImageFilterBench(BLUR_SIGMA_HUGE, BLUR_SIGMA_HUGE, true);) +DEF_BENCH(return new BlurImageFilterBench(BLUR_SIGMA_HUGE, BLUR_SIGMA_HUGE, false);) |