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 R&D Institute Poland
Samsung Electronics
p.marc...@samsung.com
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