[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] Re: [Xen-devel] Allow controlling NAPI weight of virtual network interfaces (vif) with sysfs
Hi,In that case I recommend you to take a look at the debugfs patch already in there, based on that it should be pretty straightforward to do it what you want: https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=f51de243 It already prints out "queue->napi.weight" Zoltan On 13/03/15 19:05, Ronald Pina wrote: Hi Zoltan Yes , i successfully achieved good results using tc tools, it could do the job and the performance was great. But my primary goal is to make a study about the of performance impact of the weight parameter. It must be noted that Xen use NAPI, and on dom0 every vif is treated in the same way as every real network interface. On old kernels that feature was present , here is a patch that can show how was that implemented: http://marc.info/?l=linux-netdev&m=111773621018096&w=2 As soon as on later kernel the weight was inserted on napi_struct, the weight wasn't exposed any more for every interface. Maybe that feature is not essential necessary, it can be valuable on dom0 where there many vif . It is another supplementary control knob, someone may found it useful to tweak the performance. Regards, Ronald _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxx http://lists.xen.org/xen-devel
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