On 24 October 2012 11:36, Jim Harris <jimharris at freebsd.org> wrote: > Pad tdq_lock to avoid false sharing with tdq_load and tdq_cpu_idle. Ok, but.. > struct mtx tdq_lock; /* run queue lock. */ > + char pad[64 - sizeof(struct mtx)]; .. don't we have an existing compile time macro for the cache line size, which can be used here? Adrian