[Bloat] low latency workshop

[Bloat] low latency workshop

[Dave Taht]

I was trying to find the isoc/rite low latency workshop info via
google today and stumbled across a competing event in london  and a
whole website dedicated to the latency issues in the trading industry.

This talk

http://low-latency.com/audio/london-low-latency-summit-2013-workshop-low-latency-application-engineering

had slide 18 showing the enormous improvement in from-userspace
timestamp fetching behavior in linux - from 637ns for CLOCK_REALTIME
in 2.6.27, to 35ns in linux 3.5.4...

Based on some old scars I was leery of using timestamping in userspace
for some tasks. No longer.

There are also some boards that look useful for analyzing hard
networking stuff in detail mentioned.

-- 
Dave Täht

Fixing bufferbloat with cerowrt: http://www.teklibre.com/cerowrt/subscribe.html

Re: [Bloat] low latency workshop

[Matthew Ford]

On 19 Jun 2013, at 22:27, Dave Taht <dave.taht@gmail.com> wrote:

> I was trying to find the isoc/rite low latency workshop info

http://www.internetsociety.org/latency2013

> via
> google today and stumbled across a competing event in london  and a
> whole website dedicated to the latency issues in the trading industry.

Interesting, thanks for the pointer. I wouldn't describe it as competing though - seems pretty focussed on the high-frequency trading application, although there is obviously overlap.

Mat

> 
> This talk
> 
> http://low-latency.com/audio/london-low-latency-summit-2013-workshop-low-latency-application-engineering
> 
> had slide 18 showing the enormous improvement in from-userspace
> timestamp fetching behavior in linux - from 637ns for CLOCK_REALTIME
> in 2.6.27, to 35ns in linux 3.5.4...
> 
> Based on some old scars I was leery of using timestamping in userspace
> for some tasks. No longer.
> 
> There are also some boards that look useful for analyzing hard
> networking stuff in detail mentioned.
> 
> -- 
> Dave Täht
> 
> Fixing bufferbloat with cerowrt: http://www.teklibre.com/cerowrt/subscribe.html
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> Bloat mailing list
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