OpenGL rendering affects CPU

1

I have a problem with an app that is slowed down significantly when an openFrameworks based app is launched. Both apps use little cpu and memory, so i don't think there's a bottleneck.

I can reproduce the problem by running

openssl speed

alone compared to

openssl speed

in one console and

glmark2 -b jellyfish

in another.

So openGL rendering somehow affects the CPU performance and it is not clear to me why.

Can someone explain ?

(System is Ubuntu 14.04 i7 with intel HD3000, however a system with an Nvdia card showed the same effect)

joekr

Posted 2014-07-24T10:05:47.607

Reputation: 271

It sounds like the device drivers your using do not fully support OpenGL (ES) 2.0 – Ramhound – 2014-07-24T11:14:28.287

I installed the driver from https://01.org/linuxgraphics/downloads/2014/intelr-graphics-installer-1.0.5-linux which is the best I can get I guess. Any way to test if it supports OpenGL 2.0 ?

– joekr – 2014-07-24T16:58:05.627

No answers