Abstract: Techniques for synchronizing per-central processing unit (per-CPU) data a using per socket reader-writer spinlocks (RW-spinlocks) are disclosed. In an example implementation, a RW-spinlock is allocated for each socket in a corresponding socket local memory (SLM) in a non-uniform memory access (NUMA) system. In this example implementation, each socket includes one or multiple CPUs and the CPUs in each socket are communicatively coupled to the corresponding SLM. Further, per-CPU data access between the CPUs in the NUMA system is synchronized using the per socket RW-spinlocks.