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On 7/5/18 09:42, Gary E. Miller wrote:<br>
<blockquote type="cite"
cite="mid:20180705094248.3de8bae4@spidey.rellim.com">
<pre class="moz-quote-pre" wrap="">Yo Paul!
On Wed, 4 Jul 2018 18:37:46 -0700
Paul Theodoropoulos <a class="moz-txt-link-rfc2396E" href="mailto:paul@anastrophe.com"><paul@anastrophe.com></a> wrote:
</pre>
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<pre class="moz-quote-pre" wrap="">What changed: I'd poked around with assorted parameters of the "dwc"
module, which apparently drives the USB subsystem. It got to where
I'd added all of these dwc module options to the /boot/cmdline.txt:
</pre>
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You are runnning USB on a timekeeping RasPi? I stopped doing that
when I noticed it wrecked havok with my measurements. Unplug!</pre>
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I attach a microSD card in a USB adapter in order to perform
backups, but I do only intermittently - every few days to a week or
so. I could probably leave it attached to the ntpVIZ Raspi 1 and
rsync over the LAN though; I should probably do that, then I can
back up on a more formal schedule.<br>
<blockquote type="cite"
cite="mid:20180705094248.3de8bae4@spidey.rellim.com">
<pre class="moz-quote-pre" wrap="">
Of course the ethernet goes through USB on the RasPi, so minimize
ethernet usage too.
</pre>
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Latency, jitter, etc, are terrible over wifi, and I have pretty good
wifi. When I monitor the netdata graphs in realtime over the WAN,
there's no visible change to the metrics, and that generates a lot
of https traffic, so I don't think that's it.<br>
<br>
That said, latency and jitter were terrible when I first got my
raspi 1 a couple of years ago; I've never tried it on the 3, so
perhaps wifi on the raspi 3 might not suffer those issues; I will
have to look into that. It'd be nice to be able to untether the
little devil anyway, so I could easily relocate it elsewhere in the
house where ambient temps might be smoother. I will check it out!<br>
<br>
<pre class="moz-signature" cols="72">--
Paul Theodoropoulos
<a class="moz-txt-link-abbreviated" href="http://www.anastrophe.com">www.anastrophe.com</a></pre>
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