about +S Schedulers:SchedulerOnline
If I set +S 4:4 for 4 erlang node and open 4 node, it will create 4 system process and 4 thread in every process?
when I want to scale some node just modify online num by erlang:system_flag(schedulers_online, SchedulersOnline).?
If I can say that schedulers_online reduce thread in logical cores to improve system efficiency
about +sbt & +sct
Is an mapping like this:
+sbt hardware threads => +sct <ThreadIds>
+sbt physical processor chips => +sct <ProcessorIds>
erlang:system_info(cpu_topology). seem not print ‘everything’ normally, so if this is an ordered list of level: <LogicalIds><ThreadIds><CoreIds><ProcessorIds><NodeIds>
when I set +sbt L0-3c0-3p0N0, if +sbt will have no effect
the doc have a sample:
% erl +sct L0-3c0-3 +sbt db +S3:2 -detached -noinput -noshell -sname one
% erl +sct L3-0c0-3 +sbt db +S3:2 -detached -noinput -noshell -sname two
I’m confusion about how to put these flag together