[Cerowrt-devel] cerowrt-3.10.44-6 released

Dave Taht dave.taht at gmail.com
Thu Jun 26 15:53:11 EDT 2014

I have been blowing it up with continuous traffic, saturating the cpu,
talking to multiple devices, using crypto and ethernet, now for
several days.

I am using sfq on the wifi, rather than fq_codel, at least temporarily.

Occasionally, using the rrul test, I can get it to temporarily either
lose a route or  deassociate from wifi, or something else like netperf
itself blowing up, but it always comes back within a few seconds. So
far, using the rrul_be test I haven't seen that happen. I do see cpu
absolutely maxed at present with rrul and not rrul_be.

I have given up on tuning the wifi aggregate queue length (formerly
12, now 48) as much as I had before - as the previous setting had
adverse effects on download throughput, so I'll put that fix in the
next release and live with the added latency until we can pull
together the make-wifi-fast project.

I see an improvement on the simultaneous upload/download test from
10mbit up/.2 down to 6up,3down, latency (as measured on the main
client) of about 80ms (which still sucks about 10x worse than what
seems possible)

I ran out of space on my packet captures...

I am going to be adding more clients, switching back to fq_codel, and
adding in ipv6 if this continues to take the load I am throwing at it.
Then adding impairments to degrade the wifi to more marginal levels.

Interestingly I have not got any instruction traps, nor the famed dma
overrun bug/recovery in this release so far... I am encouraged, but
until I setup a mac  with bad connectivity and have things run for
days and days I won't sleep well.

And I had done a build from this codebase for the picostation and am
watching that crash under normal load regularly. That box only has
32MB of memory, where the cerowrt box has 128MB memory.

On Thu, Jun 26, 2014 at 12:28 PM, Jim Reisert AD1C
<jjreisert at alum.mit.edu> wrote:
> Been running since Wednesday evening, no issues so far.
> --
> Jim Reisert AD1C, <jjreisert at alum.mit.edu>, http://www.ad1c.us

Dave Täht

NSFW: https://w2.eff.org/Censorship/Internet_censorship_bills/russell_0296_indecent.article

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