On Tue, 2013-11-12 at 09:03 +0800, Ethan Zhao wrote: > Eric, > We have tested the performance with the TSO and TSQ patches > merged, the result not good, even worse than kernel without those two > patches. any idea ? > > kernel : 3.11.x with TSO & TSQ merged. ( CONFIG_INTEL_IOMMU_DEFAULT_ON=y ) > Network Interface : eth4 > Network driver : be2net > > Average Bandwidth for : > 1.tcp-unidirectional test : 4385 Mbits/sec > 2.tcp-unidirectional-parallel: 9383 Mbits/sec > 3.tcp-bidirectonal test : 2755 Mbits/sec > > vs > > kernel : 3.11.x without TSO & TSQ patches. > (CONFIG_INTEL_IOMMU_DEFAULT_ON is not set) > Network Interface : eth4 > Network driver : be2net > > Average Bandwidth for : > 1.tcp-unidirectional test : 7992 Mbits/sec > 2.tcp-unidirectional-parallel: 9403 Mbits/sec > 3.tcp-bidirectonal test : 5802 Mbits/sec >
So it seems its not the TSO/TSQ changes, but CONFIG_INTEL_IOMMU_DEFAULT_ON being on instead of off. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
