Improper multi core usage

[vvoois (vV)]

@euji

Hi there!

I’ve tried many settings from 12 to 6. Usually I left it at6 because I’m not sure it’s sound to use 12 hyperthread cores (so I would agree with you). What seems to happen is that Renoise is wrongly assuming it’s using all CPUs when it fact it’s not (it shouldn’t display 100% cpu when only 25% overall cpu power is used).

Intel Vtech cannot have an impact on Renoise performance. It’s just adding a ring level to the machine and I can’t disable it as it would break Hyper-V (nota bene: Renoise isn’t running in a VM).

I wonder if it’s not related to my Fireface 800. I’ll try something.

Edit: ok I’ve tried many settings. It’s all the same. It looks as if Renoise is using only one CPU (or the CPU usage is totally wrong).
Edit2 : Another interesting thing, when Renoise is idle (nothing playing) CPU usage in renoise is at 20% (?!), but the task manager show it’s less than 8% (overall) and that Renoise is only using 3%.
Edit3: I think it shows usage for only one of the cores.

Yeah V-tech is far sighted indeed. Intel Speedstep could still be a dealbreaker although nowaday’s Enhanced Speed step should also respond a bit faster to load demand than is predecessor technology.

Regarding Taskmanager vs Renoise and core usage, read Taktik’s explanation (including the links inside that topic):

Renoise CPU meters vs. Taskmanager CPU meters

I have read many threads about the differences between the Renoise CPU meter and the one in the system. I am aware of the differences, but I wonder about the fact that Renoise seems to show only the usage of one CPU core, even if multiple cores are selected. May this be a bug? Example: I have Native Instruments Reaktor 5 with a nice preset inserted, play around, Renoise shows me around 25% CPU usage, no matter how many cores I activate / select. Running the same plugin and preset in REAPER show…