Kirill Smelkov d40fbf8d52 [media] vivi: Optimize precalculate_line() ... precalculate_line() is not very high on profile, but it calls expensive gen_twopix(), so let's polish it too: call gen_twopix() only once for every color bar and then distribute the result. before: # cmdline : /home/kirr/local/perf/bin/perf record -g -a sleep 20 # # Samples: 46K of event 'cycles' # Event count (approx.): 15574200568 # # Overhead Command Shared Object # ........ ............... .................... # 27.99% rawv libc-2.13.so [.] __memcpy_ssse3 23.29% vivi-* [kernel.kallsyms] [k] memcpy 10.30% Xorg [unknown] [.] 0xa75c98f8 5.34% vivi-* [vivi] [k] gen_text.constprop.6 4.61% rawv [vivi] [k] gen_twopix 2.64% rawv [vivi] [k] precalculate_line 1.37% swapper [kernel.kallsyms] [k] read_hpet after: # cmdline : /home/kirr/local/perf/bin/perf record -g -a sleep 20 # # Samples: 45K of event 'cycles' # Event count (approx.): 15561769214 # # Overhead Command Shared Object # ........ ............... .................... # 30.73% rawv libc-2.13.so [.] __memcpy_ssse3 26.78% vivi-* [kernel.kallsyms] [k] memcpy 10.68% Xorg [unknown] [.] 0xa73015e9 5.55% vivi-* [vivi] [k] gen_text.constprop.6 1.36% swapper [kernel.kallsyms] [k] read_hpet 0.96% Xorg [kernel.kallsyms] [k] read_hpet ... 0.16% rawv [vivi] [k] precalculate_line ... 0.14% rawv [vivi] [k] gen_twopix (i.e. gen_twopix and precalculate_line overheads are almost gone) Signed-off-by: Kirill Smelkov <kirr@mns.spb.ru> Acked-by: Hans Verkuil <hans.verkuil@cisco.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>		2012-12-21 18:25:57 -02:00
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blackfin	[media] v4l: Convert drivers to use monotonic timestamps	2012-12-21 10:56:43 -02:00
davinci	[media] davinci: vpbe: remove unused variable in vpbe_initialize()	2012-12-21 14:23:09 -02:00
exynos-gsc	[media] exynos-gsc: modify number of output/capture buffers	2012-12-21 10:26:44 -02:00
marvell-ccic	…
omap	[media] v4l: Convert drivers to use monotonic timestamps	2012-12-21 10:56:43 -02:00
omap3isp	[media] v4l: Tell user space we're using monotonic timestamps	2012-12-21 11:20:51 -02:00
s3c-camif	[media] V4L: Add driver for S3C24XX/S3C64XX SoC series camera interface	2012-11-28 09:43:34 -02:00
s5p-fimc	[media] s5p-fimc: Improved pipeline try format routine	2012-12-21 13:58:31 -02:00
s5p-g2d	[media] s5p-g2d: fix compiler warning	2012-10-05 21:27:58 -03:00
s5p-jpeg	[media] s5p-jpeg: use clk_prepare_enable and clk_disable_unprepare	2012-10-05 21:27:57 -03:00
s5p-mfc	Linux 3.7-rc8	2012-12-04 10:46:21 -02:00
s5p-tv	[media] v4l: s5p-tv: mixer: support for dmabuf exporting	2012-11-25 17:21:51 -02:00
soc_camera	[media] v4l: Convert drivers to use monotonic timestamps	2012-12-21 10:56:43 -02:00
Kconfig	[media] media: add a VEU MEM2MEM format conversion and scaling driver	2012-12-20 14:23:10 -02:00
Makefile	[media] media: add a VEU MEM2MEM format conversion and scaling driver	2012-12-20 14:23:10 -02:00
arv.c	…
coda.c	[media] media: coda: Fix H.264 header alignment - v2	2012-12-21 16:56:31 -02:00
coda.h	[media] media: coda: add horizontal / vertical flipping support	2012-09-26 16:55:22 -03:00
fsl-viu.c	[media] v4l: Convert drivers to use monotonic timestamps	2012-12-21 10:56:43 -02:00
indycam.c	…
indycam.h	…
m2m-deinterlace.c	[media] media: m2m-deinterlace: Do not set debugging flag to true	2012-12-21 18:25:07 -02:00
mem2mem_testdev.c	[media] v4l: mem2mem_testdev: add support for dmabuf importing	2012-11-25 17:19:45 -02:00
mx2_emmaprp.c	[media] [3.6.0-,3/5] media/mx2_emmaprp: use module_platform_driver macro	2012-10-27 11:35:11 -02:00
omap24xxcam-dma.c	…
omap24xxcam.c	[media] v4l: Convert drivers to use monotonic timestamps	2012-12-21 10:56:43 -02:00
omap24xxcam.h	…
sh_veu.c	[media] sh_veu.c: fix two compilation warnings	2012-12-20 14:55:12 -02:00
sh_vou.c	[media] v4l: Convert drivers to use monotonic timestamps	2012-12-21 10:56:43 -02:00
timblogiw.c	[media] v4l: Convert drivers to use monotonic timestamps	2012-12-21 10:56:43 -02:00
via-camera.c	…
via-camera.h	…
vino.c	[media] v4l: Tell user space we're using monotonic timestamps	2012-12-21 11:20:51 -02:00
vino.h	…
vivi.c	[media] vivi: Optimize precalculate_line()	2012-12-21 18:25:57 -02:00