[U-Boot] [PATCH v1] sunxi: improve throughput in the sunxi_mmc driver

[Dr. Philipp Tomsich]

> On 22 Feb 2017, at 18:22, Maxime Ripard <maxime.ripard at free-electrons.com> wrote:
> 
> On Tue, Feb 21, 2017 at 07:34:40PM +0100, Dr. Philipp Tomsich wrote:
>> 
>>> On 21 Feb 2017, at 19:11, Dr. Philipp Tomsich <philipp.tomsich at theobroma-systems.com> wrote:
>>> 
>>> We’ve never seen performance problems on Linux and benchmarked at
>>> up to ~50MByte/s on the A31-uQ7.
>> 
>> I dug into our disti training slides from early 2015—looks like the throughput
>> number (sustained) for the eMMC was 12MB/s on write and 40MB/s on read
>> when using our standard part (at that time), which was a SDIN7DP2-4G.
> 
> I was getting around 60MB/s on an A64 with an HS200 eMMC, which is
> quite good but left me the feeling that it could be better. But it was
> just a feeling :)

What does your eMMC datasheet list as expected throughput at HS200?

We haven’t even bothered benchmarking the eMMC on our boards lately,
as it’s “fast enough” for all practical purposes.

Regards,
Philipp.