James Pearson wrote: > > We have noticed significant desktop/UI lag on CentOS7 workstations using > Mate when the CPU usage is high - i.e. the mouse pointer lags and moving > windows (e.g. terminal windows) become jumpy (not smooth) > > We didn't see (or notice) this issue with CentOS6/Gnome2 > > This can easily be shown by running something like 'cpuburn' > (https://patrickmn.com/projects/cpuburn/) and moving a mate-terminal > window around the screen > > We can make things 'better' by running CPU intensive apps via 'nice' > (without any noticeable performance hit to the CPU intensive app) - but > this is a rather messy way of fixing the issue > > We can also make things better by renice'ing X to a negative nice level > > However, both these approaches seem wrong to me - as I'm probably > missing something straightforward here > > Does anyone know of any CentOS7/Mate settings that could be used to > improve desktop/UI responsiveness with high CPU usage ? Just to follow up on this - we think this issue _might_ be self inflicted ... When we started moving users to CentOS 7 from CentOS 6, we had reports that things like opening shells, running scripts and similar non-CPU intensive everyday tasks were generally 'slower' - this turned out to be a result of the default 'tuned' policy ('balanced') using the 'conservative' CPU governor setting (we didn't have any similar CPU throttling set up on CentOS 6) - and switching to the 'throughput-performance' tuned policy 'fixed' this issue for us - as it uses the 'performance' CPU governor However, it looks like something else in the 'throughput-performance' policy is causing (or contributing to) the desktop lag issues we've been seeing - and switching to a custom tuned profile (based on 'balanced' but using the 'performance' CPU governor) appears to fix our desktop lag issues ... James Pearson