Hi,
Please see my comments in-line.
On 16/09/2020 16:38, Jon Mason wrote:
[1]
https://yoctoproject.blogspot.com/2020/09/compiler-tunes-benchmarks-with-yocto.html
Should we expect so see differences?
There are more things at play here than simply performance.
Hmm interesting. This did not cross my mind at all;)
But
speaking of performance, there might not be much of a benefit between
a generic ARMv8.0 and a ARMv8 based core (like A53), but I do expect
to see a performance bump for a ARMv8.2 based core (like A76). The
delta between the former is much smaller than the latter.
I guess you mean between ARMv8.0/A53 and ARMv8.2/A76. I'll need some
toys to run tests/benchmarks there;)
The differences are not only performance. Tuning for A76 versus a
more generic armv8a allows for security features like
branch-protection to be enabled (as it isn't supported in older
versions). You get these kind of things "by default" when tuning for
the specific model.
OK - This is a very good point I completely ignored so far. I guess this
will be tricky to test.
Thanks,
Jon
If so can you suggest benchmarks which show those differences?
Regards,
Robert
Thanks - I updated my Blog post.
Regards,
Robert
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