<html><head></head><body>Good points...<br><br><div class="gmail_quote">On May 29, 2014, Michael Richardson <mcr@sandelman.ca> wrote:<blockquote class="gmail_quote" style="margin: 0pt 0pt 0pt 0.8ex; border-left: 1px solid rgb(204, 204, 204); padding-left: 1ex;">
<pre class="k10mail"><br />David P. Reed <dpreed@reed.com> wrote:<br /><blockquote class="gmail_quote" style="margin: 0pt 0pt 1ex 0.8ex; border-left: 1px solid #729fcf; padding-left: 1ex;">ECN-style signaling has the right properties ... just like TTL it can<br />provide</blockquote><br />How would you send these signals?<br /><br /><blockquote class="gmail_quote" style="margin: 0pt 0pt 1ex 0.8ex; border-left: 1px solid #729fcf; padding-left: 1ex;">A Bloom style filter can remember flow statistics for both of these local<br />policies. A great use for the memory no longer misapplied to<br />buffering....</blockquote><br />Well.<br /><br />On the higher speed dataflow equipment, the buffer is general purpose memory,<br />so reuse like this is particularly possible.<br /><br />On routers built around general purpose architectures, the limiting factor<br />in performance is often memory throughput; adding memory rarely increases<br />total throughput. Packet I/O is gener
ally
quiet sequential and so makes<br />good use of wide memory data paths and multiple accesses per address cycle.<br />Updating of tables such as Bloom filter or any other hash has a big impact<br />due to the RMW and random access nature.<br /><br />All I'm saying is that quantity of memory is seldom the problem, but access<br />to it, is.<br /><br />I do like the entire idea; it seems that it has to be implemented at the<br />places where the flow converge, which is often in the DSL line card, or<br />CTMS...<br /><br />--<br />] Never tell me the odds! | ipv6 mesh networks [<br />] Michael Richardson, Sandelman Software Works | network architect [<br />] mcr@sandelman.ca <a href="http://www.sandelman.ca">http://www.sandelman.ca</a>/ | ruby on rails [<br /><br /></pre></blockquote></div><br/>-- Sent from my Android device with <b><a href="https://play.google.com/store/apps/details?id=com.onegravity.k10.pro2">K-@ Mail</a>
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Please excuse my brevity.</body></html>