[LEDE-DEV] RFC: Throughput testing results.

[Ben Greear]

On 05/06/2016 12:05 PM, David Lang wrote:
> On Fri, 6 May 2016, Ben Greear wrote:
>
>> On 05/06/2016 10:20 AM, Toke Høiland-Jørgensen wrote:
>>> Ben Greear <greearb at candelatech.com> writes:
>>>
>>>> I am interested in feedback on the testing output. My goal is to add a
>>>> few more different hardware configurations and then do nightly (or at
>>>> least weekly) tests.
>>>
>>> So that is showing up to 10s of *seconds* of latency, right? (I'm not
>>> sure I'm reading the units right).
>>
>> Yes, 10 seconds of latency.  My traffic generator is using pfifo-fast,
>> RENO, and default socket sizes, so it can be at least part of the problem.
>
> That's so much latency that you may as well be down.
>
> Please look at the make-wifi-fast mailing list and the tests that are being done there. they show latency spikes as well as throughput, and show how it is very
> possible to get low latency without affecting throughput (in some cases, throughput actually increases)

I understand that.  My test case is fairly abusive, and my generator is not optimized for
low-latency at this time.

In many cases, throughput does go down though, so I have been slow to try the buffer
bloat stuff.  I can run some tests with codel enabled sometime soon.

I can also run my capacity test with UDP only.  That might be better for pure throughput
testing.  My hope is to be able to show regressions/improvements over time as LEDE
changes...

Thanks,
Ben

-- 
Ben Greear <greearb at candelatech.com>
Candela Technologies Inc  http://www.candelatech.com