Dhrystone

[Yao Qi]

Michael Hope wrote:
> I know that Dhrystone isn't a very good benchmark, but it's still interesting:
>  https://wiki.linaro.org/WorkingGroups/ToolChain/Benchmarks/Dhrystone
> 
Michael,
We can use 'opannotate --assembly' to get profiling results in details,
like how many events hit on a certain instruction.  As showed here,
http://oprofile.sourceforge.net/examples/

There are some other events in oprofile on ARMv7, that we can have a try
to get more information on time usage of memcpy() and strcpy().

http://oprofile.sourceforge.net/docs/arm-v7-events.php

I am not familiar with ARM arch and these hardware events on ARM, but I
think some of them should be useful for us.

> If we can get twice the performance out of strcpy() and memcpy() then
> the Dhrystone result should go up by almost 30 %.  It would make a
> nice headline at least :)
Yeah, absolutely.