Re: P9, Linux and RDP like desktop virtualization -- MIDRANGE-L

Hi Patrik

Il giorno lun 6 apr 2020 alle ore 11:05 Patrik Schindler <poc@xxxxxxxxxx>
ha scritto:

Hello Marco,

Am 06.04.2020 um 09:26 schrieb Marco Facchinetti <
marco.facchinetti@xxxxxxxxx>:

But my question is: why if I use a Windows based RDP server it's working

without problems and if I do (almost) the same in Power Linux we got
performance problems specifically in the browser?

You connect with RDP to a Linux graphical screen, do I understand right?
So, there may be two culprits:

- Microsoft most likely did heavy optimizations on the server side to make
RDP as fast as we know it. I never would expect that connecting with RDP to
a X-Server session would provide the same performance. I was tinkering with
that stuff a few years ago, because using remote X protocol in Windows
is/was always requiring requiring additional software.

I hope it's not but I suspect you're not too far away from the truth. It's
a pity since RDP could be a challenging arena for Linux to compete with
WIndows.

- I suspect that Linux Browsers are also heavily optimized for x86 code.
Maybe some critical routines have been carefully crafted in assembler to
provide the pest performance, while POWER is a niche, compared to the
overwhelming usage count of x86. I did not dig into the gigantic blob of
Firefox Code to look, though.

This is also very possible but I suspect the Firefox port to PPC64 was not
so accurate. I don't know where to ask this kind of question.

Why we guest users in an RDP session? Because we can decide the browser

and the update level of the browser. We see many ugly things letting people
choose whatever they want to run our ERP.

I don't know any details yet but to me this sounds like a basic
architectural problem in the ERP itself. For years, browsers have become
more and more similar in behaviour, especially after the release of the
HTML5 standard.

Sometimes we see problems using the same browser with different OS or even
with different path level so we planned to control this aspect executing
our product inside a controlled environment.

Maybe you could set up a similar Linux terminal server on an x86 server or

VM to test performance with this one?

I guess we will do it.

Thanks

:wq! PoC

PGP-Key: DDD3 4ABF 6413 38DE - https://www.pocnet.net/poc-key.asc

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