Re: [U-Boot] [PATCH v2 1/8] exynos: config: enable arch memcpy and arch memset
Hello, On 02/18/2015 05:23 AM, Simon Glass wrote: On 16 February 2015 at 08:13, Przemyslaw Marczak p.marc...@samsung.com wrote: This commit enables the following configs: - CONFIG_USE_ARCH_MEMCPY - CONFIG_USE_ARCH_MEMSET This increases the performance of memcpy/memset and also reduces the boot time. This was tested on Trats2. A quick test with trace. Boot time from start to main_loop() entry: - ~1527ms - before this change (arch memset enabled for .bss clear) - ~1384ms - after this change Signed-off-by: Przemyslaw Marczak p.marc...@samsung.com Cc: Minkyu Kang mk7.k...@samsung.com Cc: Akshay Saraswat aksha...@samsung.com Cc: Simon Glass s...@chromium.org Cc: Sjoerd Simons sjoerd.sim...@collabora.co.uk --- include/configs/exynos-common.h | 3 +++ 1 file changed, 3 insertions(+) Reviewed-by: Simon Glass s...@chromium.org BTW in case you are interested, in the Chromium U-Boot tree (chromeos-v2013.06 branch) we have exynos support for turning on the cache in SPL and leaving it on through to the end of U-Boot. It runs two SPLs and two U-Boots (with verified boot and kernel verification) in a total of about 750ms. This shipped last year with Pit and Pi (Samsung Chromebook 2). Might be some interesting patches there... Regards, Simon This is very interesting. Some time ago I made some tests witch the cache on/off cases for s-boot(bl1/Bl2 for trats2). Enabling the cache incredible improve the performance. Since it is easy to break the Trats2, such changes in the s-boot has no sense. But it could be easy in the future to modify the bl2 for Odroid. Best regards, -- Przemyslaw Marczak Samsung RD Institute Poland Samsung Electronics p.marc...@samsung.com ___ U-Boot mailing list U-Boot@lists.denx.de http://lists.denx.de/mailman/listinfo/u-boot
Re: [U-Boot] [PATCH v2 1/8] exynos: config: enable arch memcpy and arch memset
On 16 February 2015 at 08:13, Przemyslaw Marczak p.marc...@samsung.com wrote: This commit enables the following configs: - CONFIG_USE_ARCH_MEMCPY - CONFIG_USE_ARCH_MEMSET This increases the performance of memcpy/memset and also reduces the boot time. This was tested on Trats2. A quick test with trace. Boot time from start to main_loop() entry: - ~1527ms - before this change (arch memset enabled for .bss clear) - ~1384ms - after this change Signed-off-by: Przemyslaw Marczak p.marc...@samsung.com Cc: Minkyu Kang mk7.k...@samsung.com Cc: Akshay Saraswat aksha...@samsung.com Cc: Simon Glass s...@chromium.org Cc: Sjoerd Simons sjoerd.sim...@collabora.co.uk --- include/configs/exynos-common.h | 3 +++ 1 file changed, 3 insertions(+) Reviewed-by: Simon Glass s...@chromium.org BTW in case you are interested, in the Chromium U-Boot tree (chromeos-v2013.06 branch) we have exynos support for turning on the cache in SPL and leaving it on through to the end of U-Boot. It runs two SPLs and two U-Boots (with verified boot and kernel verification) in a total of about 750ms. This shipped last year with Pit and Pi (Samsung Chromebook 2). Might be some interesting patches there... Regards, Simon ___ U-Boot mailing list U-Boot@lists.denx.de http://lists.denx.de/mailman/listinfo/u-boot
[U-Boot] [PATCH v2 1/8] exynos: config: enable arch memcpy and arch memset
This commit enables the following configs: - CONFIG_USE_ARCH_MEMCPY - CONFIG_USE_ARCH_MEMSET This increases the performance of memcpy/memset and also reduces the boot time. This was tested on Trats2. A quick test with trace. Boot time from start to main_loop() entry: - ~1527ms - before this change (arch memset enabled for .bss clear) - ~1384ms - after this change Signed-off-by: Przemyslaw Marczak p.marc...@samsung.com Cc: Minkyu Kang mk7.k...@samsung.com Cc: Akshay Saraswat aksha...@samsung.com Cc: Simon Glass s...@chromium.org Cc: Sjoerd Simons sjoerd.sim...@collabora.co.uk --- include/configs/exynos-common.h | 3 +++ 1 file changed, 3 insertions(+) diff --git a/include/configs/exynos-common.h b/include/configs/exynos-common.h index 1f3ee55..5c14c40 100644 --- a/include/configs/exynos-common.h +++ b/include/configs/exynos-common.h @@ -30,6 +30,9 @@ #define CONFIG_SKIP_LOWLEVEL_INIT #define CONFIG_BOARD_EARLY_INIT_F +#define CONFIG_USE_ARCH_MEMCPY +#define CONFIG_USE_ARCH_MEMSET + /* Keep L2 Cache Disabled */ #define CONFIG_CMD_CACHE -- 1.9.1 ___ U-Boot mailing list U-Boot@lists.denx.de http://lists.denx.de/mailman/listinfo/u-boot
