Re: Call for GSoC/Outreachy internship project ideas

[Palmer Dabbelt]

On Wed, 31 Jan 2024 06:39:25 PST (-0800), stefanha@gmail.com wrote:
> On Tue, 30 Jan 2024 at 14:40, Palmer Dabbelt <palmer@dabbelt.com> wrote:
> > On Mon, 15 Jan 2024 08:32:59 PST (-0800), stefanha@gmail.com wrote:
> > I'm not 100% sure this is a sane GSoC idea, as it's a bit open ended and
> > might have some tricky parts.  That said it's tripping some people up
> > and as far as I know nobody's started looking at it, so I figrued I'd
> > write something up.
>
> Hi Palmer,
> Your idea has been added:
> https://wiki.qemu.org/Google_Summer_of_Code_2024#RISC-V_Vector_TCG_Frontend_Optimization
>
> I added links to the vector extension specification and the RISC-V TCG
> frontend source code.
>
> Please add concrete tasks (e.g. specific optimizations the intern
> should implement and benchmark) by Feb 21st. Thank you!

OK.  We've got a few examples starting to filter in, I'll keep updating 
the bug until we get some nice concrete reproducers for slowdows of 
decent vectorized code.  Then I'll take a look and what's inside them, 
with any luck it'll be simple to figure out which vector instructions 
are commonly used and slow -- there's a bunch of stuff in the RVV 
translation that doesn't map cleanly, so I'm guessing it'll be in there.

If that all goes smoothly then I think we should have a reasonably 
actionable intern project, but LMK if you were thinking of something 
else?

> Stefan