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<div class="moz-cite-prefix">On 01/11/17 19:01, Barry Martin wrote:<br>
</div>
<blockquote type="cite"
cite="mid:5905b683-a12d-10df-f89b-9362e08b27aa@gmail.com">
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<p style="margin-bottom: 0in; line-height: 100%">Hi Folks!</p>
<p style="margin-bottom: 0in; line-height: 100%"><br>
</p>
<p style="margin-bottom: 0in; line-height: 100%">First, thanks for
the assistance in the past; has resolved a lot of issues.
Hopefully can get this one resolved also, probably just
something simple I don’t understand while trying to do my own
troubleshooting.</p>
<p style="margin-bottom: 0in; line-height: 100%"><br>
</p>
<p style="margin-bottom: 0in; line-height: 100%">Have two Backends
– separate IPs and passwords. Wanting to switch to the “new and
improved” Backend with better specs and before the old Backend’s
motherboard fails. The old system is “BE1” and the
new/replacement is “BE2”. So when a (remote) Frontend looks at
BE1 (old) it plays nice, Fast Forward through commercials is
snappy, all is well. Same Frontend on BE2 (new), playback is
fine but when hit FF it sits at 3x for a second or two (same
frame), then (say) 20 or 30x and the frame is
jump-pause-jump-pause – probably takes two or three times as
long to get through commercials with the new system as the old,
which has a lot faster processor: BE2: AMD Athlon II X2 250
Processor – dual core @ 3010.387 MHz, Mythbuntu 64 bit. Did the
add ppa for 0.28/ update/upgrade/reboot steps this morning;
didn’t help the FF sluggishness problem.</p>
<p style="margin-bottom: 0in; line-height: 100%"><br>
</p>
<p style="margin-bottom: 0in; line-height: 100%">On the System
Information page with the BE Status:</p>
<p style="margin-bottom: 0in; line-height: 100%"> Machine
Status (@ BE2) (while two shows recoding):</p>
<p style="margin-bottom: 0in; line-height: 100%"> RAM: 15 GB
total, 5.8 GB used, 9.6 (or 62%) free.</p>
<p style="margin-bottom: 0in; line-height: 100%"> Swap: 3.7
GB, 0 KB used, 3.7 GB (or 100%) free.</p>
<p style="margin-bottom: 0in; line-height: 100%"><br>
</p>
<p style="margin-bottom: 0in; line-height: 100%">What may be a
little odd is exit and look at System Monitor (at Desktop) it’s
graph barely indicates any RAM usage: around 1.0 GiB of 15.4
GiB. Running SysMon, load mythfrontend via Terminal … exit, so
SysMon still running. (Swap is 0 bytes at 3.7 GiB.) Both cores
show I guess lowish use: right now something is recording and
both cores ‘wobbling’ about 15-20% usage. (Later: Recording
finished: now both cores idling 0 – 4%.)</p>
<p style="margin-bottom: 0in; line-height: 100%"><br>
</p>
<p style="margin-bottom: 0in; line-height: 100%">Both Backends
connect to the LAN via the same switch, both are gigabyte LANs.
Have tested with four Frontends (one a Raspberry Pi 3 I’m
working on): BE1, no problem, nice and smooth; BE2, playback is
fine but FF, Rewind, and Commercial Rewind (title?) is
jumpy/staccato and sluggish.</p>
<p style="margin-bottom: 0in; line-height: 100%"><br>
</p>
<p style="margin-bottom: 0in; line-height: 100%">Miscellaneous
thoughts:</p>
<p style="margin-bottom: 0in; line-height: 100%"><br>
</p>
<p style="margin-bottom: 0in; line-height: 100%">(1) Found how to
test the NIC speed: </p>
<pre class="western"><code class="western"> </code><code class="western">sudo ethtool </code><code class="western">enp4s0</code><code class="western"> | grep -i speed</code> ==> Speed: 1000Mb/s</pre>
<p style="margin-bottom: 0in; line-height: 100%"> <br>
</p>
<p style="margin-bottom: 0in; line-height: 100%">(2) Also found
this webpage: <font face="Norasi"><a
href="https://www.mythtv.org/wiki/Troubleshooting:Prebuffering_pause"
moz-do-not-send="true">https://www.mythtv.org/wiki/Troubleshooting:Prebuffering_pause</a>
– </font><font face="Norasi">uhhh, no idea. </font><font
face="Norasi">Rather ask than screw something up.</font></p>
<p style="margin-bottom: 0in; line-height: 100%"><br>
</p>
<p style="margin-bottom: 0in; line-height: 100%">(3) Also had
tried turning off the Frontend portion on the Backend (BE2) –
saw comments in the above webpage about a misconfiguration.</p>
<p style="margin-bottom: 0in; line-height: 100%"><br>
</p>
<p style="margin-bottom: 0in; line-height: 100%">...OK, enough of
my trying to give you folks enough information to make informed
suggestions. TIA!</p>
<p style="margin-bottom: 0in; line-height: 100%"><br>
</p>
<p style="margin-bottom: 0in; line-height: 100%">Barry</p>
<p style="margin-bottom: 0in; line-height: 100%"><br>
</p>
</blockquote>
For the NIC speed it only shows what it is capable of running at.<br>
<br>
You could try running iperf utility to see what transfer rate you
are getting from a Frontend to each of your the backends, e.g.<br>
<br>
on backend in a terminal run iperf -s (if not installed install it
with sudo apt install iperf) this sets up iperf as a server.<br>
<br>
on frontend in a terminal run iperf -c <ip address of
backend> after a few seconds you should see something like <br>
mike@mike-GL62-7QF:~$ iperf -c 192.168.1.22<br>
------------------------------------------------------------<br>
Client connecting to 192.168.1.22, TCP port 5001<br>
TCP window size: 85.0 KByte (default)<br>
------------------------------------------------------------<br>
[ 3] local 192.168.1.4 port 56566 connected with 192.168.1.22 port
5001<br>
[ ID] Interval Transfer Bandwidth<br>
[ 3] 0.0-10.0 sec 302 MBytes 252 Mbits/sec<br>
<br>
In this case this is a result from my laptop over wifi to a
backend connected via gigabit to my router.<br>
<br>
mike@mike-GL62-7QF:~$ iperf -c 192.168.1.22<br>
------------------------------------------------------------<br>
Client connecting to 192.168.1.22, TCP port 5001<br>
TCP window size: 85.0 KByte (default)<br>
------------------------------------------------------------<br>
[ 3] local 192.168.1.2 port 57816 connected with 192.168.1.22 port
5001<br>
[ ID] Interval Transfer Bandwidth<br>
[ 3] 0.0-10.0 sec 1.09 GBytes 933 Mbits/sec<br>
<br>
This one is via gigabit interface on my laptop to a backend
connected via gigabit to my router.<br>
<br>
Note there is also a later version of iperf iperf3 just make sure
you use the same one at both ends.<br>
<br>
Mike<br>
<br>
<br>
<br>
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