Nicolas Pitre c626e3f5ca [ARM] alternative copy_to_user: more precise fallback threshold ... Previous size thresholds were guessed from various user space benchmarks using a kernel with and without the alternative uaccess option. This is however not as precise as a kernel based test to measure the real speed of each method. This adds a simple test bench to show the time needed for each method. With this, the optimal size treshold for the alternative implementation can be determined with more confidence. It appears that the optimal threshold for both copy_to_user and clear_user is around 64 bytes. This is not a surprise knowing that the memcpy and memset implementations need at least 64 bytes to achieve maximum throughput. One might suggest that such test be used to determine the optimal threshold at run time instead, but results are near enough to 64 on tested targets concerned by this alternative copy_to_user implementation, so adding some overhead associated with a variable threshold is probably not worth it for now. Signed-off-by: Nicolas Pitre <nico@marvell.com>		2009-05-30 01:10:15 -04:00
..
boot
common	[ARM] smp: fix cpumask usage in ARM SMP code	2009-05-17 16:22:46 +01:00
configs	Merge branch 'for-rmk' of git://git.pengutronix.de/git/imx/linux-2.6	2009-05-05 09:22:26 +01:00
include/asm	[ARM] allow for alternative __copy_to_user/__clear_user implementations	2009-05-29 22:34:45 -04:00
kernel	[ARM] smp: fix cpumask usage in ARM SMP code	2009-05-17 16:22:46 +01:00
lib	[ARM] alternative copy_to_user: more precise fallback threshold	2009-05-30 01:10:15 -04:00
mach-aaec2000
mach-at91	clocksource: pass clocksource to read() callback	2009-04-21 13:41:47 -07:00
mach-clps711x
mach-davinci	Merge branch 'fix/asoc' into for-linus	2009-05-15 15:38:26 +02:00
mach-ebsa110
mach-ep93xx	[ARM] 5509/1: ep93xx: clkdev enable UARTS	2009-05-16 19:55:56 +01:00
mach-footbridge
mach-gemini
mach-h720x
mach-imx	Merge master.kernel.org:/home/rmk/linux-2.6-arm	2009-04-24 08:36:41 -07:00
mach-integrator	[ARM] 5517/1: integrator: don't put clock lookups in __initdata	2009-05-18 17:43:16 +01:00
mach-iop13xx	dma-mapping: replace all DMA_64BIT_MASK macro with DMA_BIT_MASK(64)	2009-04-07 08:31:10 -07:00
mach-iop32x
mach-iop33x
mach-ixp4xx	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6	2009-05-10 10:46:45 -07:00
mach-ixp23xx
mach-ixp2000
mach-kirkwood	[ARM] 5460/1: Orion: reduce namespace pollution	2009-04-23 23:25:41 +01:00
mach-ks8695
mach-l7200	[ARM] mach-l7200: fix spelling of SYS_CLOCK_OFF	2009-05-18 11:25:08 +01:00
mach-lh7a40x
mach-loki	[ARM] 5460/1: Orion: reduce namespace pollution	2009-04-23 23:25:41 +01:00
mach-mmp
mach-msm	clocksource: pass clocksource to read() callback	2009-04-21 13:41:47 -07:00
mach-mv78xx0	[ARM] 5460/1: Orion: reduce namespace pollution	2009-04-23 23:25:41 +01:00
mach-mx1	MX1ADS: remove I2C ifdefs	2009-04-16 12:57:15 +02:00
mach-mx2	imx21: activate i2c	2009-04-16 12:57:13 +02:00
mach-mx3	mx31ads: Mark as having full regulatoion constraints with 1133-EV1 board	2009-04-16 13:03:56 +02:00
mach-netx	clocksource: pass clocksource to read() callback	2009-04-21 13:41:47 -07:00
mach-ns9xxx	clocksource: pass clocksource to read() callback	2009-04-21 13:41:47 -07:00
mach-omap1	Merge branch 'omap-clock-fixes' into omap-fixes	2009-04-24 09:56:16 -07:00
mach-omap2	ARM: OMAP2/3: Change omapfb to use clkdev for dispc and rfbi, v2	2009-05-16 08:28:17 -07:00
mach-orion5x	[ARM] 5460/1: Orion: reduce namespace pollution	2009-04-23 23:25:41 +01:00
mach-pnx4008
mach-pxa	[ARM] 5513/1: Eurotech VIPER SBC: fix compilation error	2009-05-16 19:55:56 +01:00
mach-realview	[ARM] realview: fix broadcast tick support	2009-05-17 17:11:35 +01:00
mach-rpc
mach-s3c24a0/include/mach
mach-s3c2400
mach-s3c2410	[ARM] S3C2410: mach-bast.c registering i2c data too early	2009-05-15 15:13:25 +01:00
mach-s3c2412	[ARM] S3C2412: Add missing cache flush in suspend code	2009-05-01 12:28:16 +01:00
mach-s3c2440	[ARM] Osiris: Fix double initialisation in machine block	2009-04-17 12:42:24 +01:00
mach-s3c2442
mach-s3c2443
mach-s3c6400	[ARM] S3C64XX: Add S3C64XX_PA_IIS{0,1} to <mach/map.h>	2009-05-01 12:28:16 +01:00
mach-s3c6410	[ARM] SMDK6410: Request GPIOs for LCD power control	2009-04-15 14:46:03 +01:00
mach-sa1100	[ARM] lart: fix build error	2009-04-26 13:56:01 +01:00
mach-shark
mach-versatile	[ARM] 5518/1: versatile: don't put clock lookups in __initdata	2009-05-18 17:43:06 +01:00
mach-w90x900
mm	Merge master.kernel.org:/home/rmk/linux-2.6-arm	2009-05-02 16:40:20 -07:00
nwfpe	[ARM] nwfpe: fix 'floatx80_is_nan' sparse warning	2009-05-15 12:49:14 +01:00
oprofile
plat-iop	dma-mapping: replace all DMA_32BIT_MASK macro with DMA_BIT_MASK(32)	2009-04-07 08:31:11 -07:00
plat-mxc	mx27ads: move PBC mapping out of vmalloc space	2009-05-05 09:37:08 +02:00
plat-omap	ARM: OMAP3: Fix number of GPIO lines for 34xx	2009-05-16 08:28:16 -07:00
plat-orion	Merge master.kernel.org:/home/rmk/linux-2.6-arm	2009-04-24 08:36:41 -07:00
plat-pxa	[ARM] pxa: fix issue of muxed GPIO irq_chip functions touching non-muxed GPIOs	2009-04-27 11:45:16 +08:00
plat-s3c	[ARM] S3C: Do not set clk->owner field if unset	2009-05-15 15:21:57 +01:00
plat-s3c24xx	[ARM] S3C24XX: Fix unused code warning in arch/arm/plat-s3c24xx/dma.c	2009-05-15 15:13:24 +01:00
plat-s3c64xx	[ARM] S3C64XX: fix GPIO debug	2009-05-15 15:13:18 +01:00
tools
vfp
Kconfig	[ARM] alternative copy_to_user/clear_user implementation	2009-05-29 22:36:45 -04:00
Kconfig-nommu
Kconfig.debug
Makefile