The PV code in the v5 patch did seem to improve benchmark performance with moderate to heavy spinlock contention. However, I didn't see much CPU kicking going on. My theory is that the additional PV code complicates the pause loop timing so that the hardware PLE didn't kick in, whereas the original pause loop is pretty simple causing PLE to happen fairly frequently.
you could play with ple_gap parameter to make it work for bigger spin-loops in such cases. _______________________________________________ Virtualization mailing list [email protected] https://lists.linuxfoundation.org/mailman/listinfo/virtualization
