Hello.
On Wed, Nov 10, 2021 at 12:13:57PM +0100, Felix Moessbauer felix.moessbauer@siemens.com wrote:
However, I was not able to see any latency improvements when using cpuset.cpus.partition=isolated.
Interesting. What was the baseline against which you compared it (isolcpus, no cpusets,...)?
The test was performed with jitterdebugger on CPUs 1-3 and the following cmdline: rcu_nocbs=1-4 nohz_full=1-4 irqaffinity=0,5-6,11 intel_pstate=disable On the other cpus, stress-ng was executed to generate load. [...]
This requires cgroup.type=threaded on both cgroups and changes to the application (threads have to be born in non-rt group and moved to rt-group).
But even with isolcpus the application would need to set affinity of threads to the selected CPUs (cf cgroup migrating). Do I miss anything?
Thanks, Michal