On Tue, 26 Nov 2019 00:07:50 -0500 Ted Felix <t...@tedfelix.com> wrote:
>On 11/22/19 6:39 PM, Will Godfrey wrote: >> Exactly what setup have you got there if you don't mind me asking? > > 1st gen Core i3-370M. I'm using "top" to measure CPU usage. > > I go with low spec hardware to make performance issues like this >easier to see. This is how I was able to improve rg performance >significantly. > > To me the important point is that while idling, fluidsynth uses a >small fraction of the CPU that zyn and yosh use. That means there is >definitely room for improvement. > > It's entirely possible that the issue is related to the fact that I'm >using whatever version Ubuntu 18.04 shipped with. Maybe they built this >with optimizations off? Maybe these are older versions? > >Ted. Hi Ted, That explains a lot. It would indeed be compiled with no options at all. This is a debian requirement to maximise the compatibility across a wide range of devices, and from their point of view makes perfect sense. If I install such a .deb here, I get around 20% and this is almost entirely the low priority stuff (using htop), so your old setup is actually doing rather well. It is also somewhat unfair to compare with a more-or-less straight sample player like fluidsynth which has practically no overhead. While there is always room for improvement, Yoshi/Zyn have to do a lot of work just to stand still, because absolutely everything is generated in real time. This is why we try to push as much as possible out of the RT thread. The more cores you have, the better this works. Paul Nasca's original design is quite unique. Lots of people have said that the 'problem' is all the FFT stuff and it should use a wavetable design... until they look at exactly what it can do and the amount of real time variation there is in actually sounding notes. Will. P.S. Sorry. That's turned into a bit of a sermon :*) -- Will J Godfrey http://www.musically.me.uk Say you have a poem and I have a tune. Exchange them and we can both have a poem, a tune, and a song. _______________________________________________ Rosegarden-user mailing list Rosegarden-user@lists.sourceforge.net - use the link below to unsubscribe https://lists.sourceforge.net/lists/listinfo/rosegarden-user
