3 ms·

I'm not necessarily questioning the accuracy, just that they generally don't consider the affinities and a lot of software assumes that number of cpus matches t

by uxcn 11y ago

I'm not necessarily questioning the accuracy, just that they generally don't consider the affinities and a lot of software assumes that number of cpus matches the concurrency available. If only half the cpus are in the affinity set, the processes/threads could generally contend twice as much as possible. I guess depending on how the number is used it could improve the throughput though (e.g. blocking on i/o).

tedunangst 11y ago
Depends on the language used in the spec, but "CPUs available for scheduling" seems like the definition most software should use. However, I suspect most software is built using an interface that returns the total CPU count for the machine.
- uxcn 11y ago
  The language is typically vague, if there is any. POSIX also notably never had anything to say in regard to cpu affinity.