From: Jason Wang <jasowang@xxxxxxxxxx> Date: Wed, 23 Jul 2014 16:33:53 +0800 > This series introduces the support for rx busy polling support. This > was useful for reduing the latency for a kvm guest. Instead of > introducing new states and spinlocks, this series re-uses NAPI state > to synchonrize between NAPI and busy polling. This grealy simplified > the codes and reduce the overheads of spinlocks for normal NAPI fast > path. > > Test was done between a kvm guest and an external host. Two hosts were > connected through 40gb mlx4 cards. With both busy_poll and busy_read > are set to 50 in guest, 1 byte netperf tcp_rr shows 127% improvement: > transaction rate was increased from 8353.33 to 18966.87. > > Changes from V2: > - Avoid introducing new states and spinlocks by reusuing the NAPI > state > - Fix the budget calculation in virtnet_poll() > - Drop patch 1/3 from V2 since it was useless > > Changes from V1: > - split the patch info smaller ones > - add more details about test setup/configuration Series applied, thanks Jason. _______________________________________________ Virtualization mailing list Virtualization@xxxxxxxxxxxxxxxxxxxxxxxxxx https://lists.linuxfoundation.org/mailman/listinfo/virtualization
