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Re: [RFC PATCH 00/30] Kernel NET policy

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On Mon, Jul 18, 2016 at 5:51 PM, Liang, Kan <kan.liang@intel.com> wrote:
>
>
>> >
>> > It is a big challenge to get good network performance. First, the
>> > network performance is not good with default system settings. Second,
>> > it is too difficult to do automatic tuning for all possible workloads,
>> > since workloads have different requirements. Some workloads may want
>> high throughput.
>>
>> Seems you did lots of tests to find optimal settings for a given base policy.
>>
> Yes. Current test only base on Intel i40e driver. The optimal settings should
> vary for other devices. But adding settings for new device is not hard.
>
The optimal settings are very dependent on system architecture (NUMA
config, #cpus, memory, etc.) and sometimes kernel version as well. A
database that provides best configurations across different devices,
architectures, and kernel version might be interesting; but beware
that that is a whole bunch of work to maintain, Either way policy like
this really should be handled in userspace.

Tom

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[RFC PATCH 00/30] Kernel NET policy kan.liang@intel.com - 2016-07-18 16:30 +0200
  [RFC PATCH 10/30] net/netpolicy: introduce netpolicy object kan.liang@intel.com - 2016-07-18 16:30 +0200
  [RFC PATCH 20/30] net/netpolicy: introduce per socket netpolicy kan.liang@intel.com - 2016-07-18 16:30 +0200
  [RFC PATCH 28/30] net/netpolicy: optimize for queue pair kan.liang@intel.com - 2016-07-18 16:30 +0200
  [RFC PATCH 29/30] net/netpolicy: limit the total record number kan.liang@intel.com - 2016-07-18 16:30 +0200
  [RFC PATCH 30/30] Documentation/networking: Document net policy kan.liang@intel.com - 2016-07-18 16:30 +0200
    Re: [RFC PATCH 30/30] Documentation/networking: Document net policy Randy Dunlap <rdunlap@infradead.org> - 2016-07-18 19:10 +0200
  [RFC PATCH 24/30] net/netpolicy: set rx queues according to policy kan.liang@intel.com - 2016-07-18 16:30 +0200
  [RFC PATCH 23/30] i40e/ethtool: support RX_CLS_LOC_ANY kan.liang@intel.com - 2016-07-18 16:30 +0200
    Re: [RFC PATCH 23/30] i40e/ethtool: support RX_CLS_LOC_ANY Alexander Duyck <alexander.duyck@gmail.com> - 2016-07-18 18:30 +0200
  [RFC PATCH 14/30] net/netpolicy: add MIX policy kan.liang@intel.com - 2016-07-18 16:30 +0200
  [RFC PATCH 19/30] net/netpolicy: implement netpolicy register kan.liang@intel.com - 2016-07-18 16:30 +0200
  [RFC PATCH 27/30] net/netpolicy: fast path for finding the queues kan.liang@intel.com - 2016-07-18 16:30 +0200
  [RFC PATCH 09/30] net/netpolicy: enable and disable net policy kan.liang@intel.com - 2016-07-18 16:40 +0200
  [RFC PATCH 18/30] net/netpolicy: handle channel changes kan.liang@intel.com - 2016-07-18 16:40 +0200
  [RFC PATCH 08/30] net/netpolicy: set and remove irq affinity kan.liang@intel.com - 2016-07-18 16:40 +0200
  [RFC PATCH 16/30] net/netpolicy: net device hotplug kan.liang@intel.com - 2016-07-18 16:40 +0200
  [RFC PATCH 04/30] net/netpolicy: get driver information kan.liang@intel.com - 2016-07-18 16:40 +0200
  [RFC PATCH 15/30] i40e/netpolicy: add MIX policy support kan.liang@intel.com - 2016-07-18 16:40 +0200
  [RFC PATCH 05/30] i40e/netpolicy: implement ndo_get_irq_info kan.liang@intel.com - 2016-07-18 16:40 +0200
  [RFC PATCH 11/30] net/netpolicy: set net policy by policy name kan.liang@intel.com - 2016-07-18 16:40 +0200
  [RFC PATCH 01/30] net: introduce NET policy kan.liang@intel.com - 2016-07-18 16:40 +0200
  [RFC PATCH 03/30] i40e/netpolicy: Implement ndo_netpolicy_init kan.liang@intel.com - 2016-07-18 16:40 +0200
  [RFC PATCH 17/30] net/netpolicy: support CPU hotplug kan.liang@intel.com - 2016-07-18 16:40 +0200
  [RFC PATCH 02/30] net/netpolicy: init NET policy kan.liang@intel.com - 2016-07-18 16:40 +0200
  [RFC PATCH 06/30] net/netpolicy: get CPU information kan.liang@intel.com - 2016-07-18 16:40 +0200
  [RFC PATCH 07/30] net/netpolicy: create CPU and queue mapping kan.liang@intel.com - 2016-07-18 16:40 +0200
  Re: [RFC PATCH 00/30] Kernel NET policy Florian Westphal <fw@strlen.de> - 2016-07-18 17:20 +0200
    Re: [RFC PATCH 00/30] Kernel NET policy Andi Kleen <andi@firstfloor.org> - 2016-07-18 17:50 +0200
      Re: [RFC PATCH 00/30] Kernel NET policy Cong Wang <xiyou.wangcong@gmail.com> - 2016-07-18 20:00 +0200
        Re: [RFC PATCH 00/30] Kernel NET policy Cong Wang <xiyou.wangcong@gmail.com> - 2016-07-18 22:20 +0200
          RE: [RFC PATCH 00/30] Kernel NET policy "Liang, Kan" <kan.liang@intel.com> - 2016-07-18 22:30 +0200
        RE: [RFC PATCH 00/30] Kernel NET policy "Liang, Kan" <kan.liang@intel.com> - 2016-07-18 22:20 +0200
      Re: [RFC PATCH 00/30] Kernel NET policy Hannes Frederic Sowa <hannes@stressinduktion.org> - 2016-07-18 21:10 +0200
        Re: [RFC PATCH 00/30] Kernel NET policy Andi Kleen <andi@firstfloor.org> - 2016-07-18 21:50 +0200
          Re: [RFC PATCH 00/30] Kernel NET policy Hannes Frederic Sowa <hannes@stressinduktion.org> - 2016-07-19 00:00 +0200
            RE: [RFC PATCH 00/30] Kernel NET policy "Liang, Kan" <kan.liang@intel.com> - 2016-07-19 03:50 +0200
              Re: [RFC PATCH 00/30] Kernel NET policy David Miller <davem@davemloft.net> - 2016-07-19 07:10 +0200
                RE: [RFC PATCH 00/30] Kernel NET policy "Liang, Kan" <kan.liang@intel.com> - 2016-07-19 15:50 +0200
    RE: [RFC PATCH 00/30] Kernel NET policy "Liang, Kan" <kan.liang@intel.com> - 2016-07-18 18:00 +0200
      Re: [RFC PATCH 00/30] Kernel NET policy Florian Westphal <fw@strlen.de> - 2016-07-18 18:20 +0200
        RE: [RFC PATCH 00/30] Kernel NET policy "Liang, Kan" <kan.liang@intel.com> - 2016-07-18 19:50 +0200
      Re: [RFC PATCH 00/30] Kernel NET policy Tom Herbert <tom@herbertland.com> - 2016-07-18 18:40 +0200
        RE: [RFC PATCH 00/30] Kernel NET policy "Liang, Kan" <kan.liang@intel.com> - 2016-07-18 20:00 +0200
  Re: [RFC PATCH 00/30] Kernel NET policy Daniel Borkmann <daniel@iogearbox.net> - 2016-07-18 18:30 +0200
    RE: [RFC PATCH 00/30] Kernel NET policy "Liang, Kan" <kan.liang@intel.com> - 2016-07-18 20:40 +0200
      Re: [RFC PATCH 00/30] Kernel NET policy Daniel Borkmann <daniel@iogearbox.net> - 2016-07-18 23:00 +0200
  Re: [RFC PATCH 00/30] Kernel NET policy Alexander Duyck <alexander.duyck@gmail.com> - 2016-07-18 19:10 +0200
    RE: [RFC PATCH 00/30] Kernel NET policy "Liang, Kan" <kan.liang@intel.com> - 2016-07-18 21:50 +0200
      Re: [RFC PATCH 00/30] Kernel NET policy Andi Kleen <andi@firstfloor.org> - 2016-07-18 22:00 +0200

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