pub fn is_smt_thread(cpu: u32, sib: u32) -> boolExpand description
True when the CPU is the second thread of one core. Sibling holds all ones on single thread, so single thread stays false with no panic. A lower sibling marks the second thread, so only one card per core shows SMT with no extra sysfs use. Two-way assumed as in sibling_cpus, so a third thread on wider cores stays single by design with no extra kick and no non-x86 walk.