On Thu, 05 Nov 2015 13:02:13 +0100,
Stefano Miccoli mo...@icloud.com wrote:
...
> Just a few numbers, collected with
> https://github.com/miccoli/pyownet/blob/master/test/timing.py
> <https://github.com/miccoli/pyownet/blob/master/test/timing.py> querying a
> non localhost production owserver
> pyownet: ver. 0.8.2
> proxy_obj: ownet server at ('10.48.74.112', 4304)
> server info: pid 2662, ver. unknown
>
> timeit:
> statement: proxy_obj.dir("/")
> number: 20
> repetitions: 5
>
> ** non persistent : 1.29 ms, 1.30 ms, 1.30 ms, 1.33 ms, 1.36 ms,
> ** persistent : 0.77 ms, 0.77 ms, 0.79 ms, 0.80 ms, 0.97 ms,
> The figure reported here are time for a single call to the given method,
> computed as the average of 20 consecutive calls. (Please note that I read
> the cached temperature value? uncached is of course much slower, but this
> is due to 1-wire)
I was surprised by the timing numbers you posted. So I tried your test script
with my BBB installation...
Running on the BBB with the owserver:
---
ubuntu@arm:~/Lpkg$ python3 StefanoTimingTest.py3
pyownet: ver. 0.8.2 (/usr/local/lib/python3.4/dist-packages/pyownet/__init__.py)
proxy_obj: ownet server at ('127.0.0.1', 4304)
server info: pid 1243, ver. unknown
timeit:
statement: proxy_obj.dir("/")
number: 20
repetitions: 5
** non persistent : 37.55 ms, 37.78 ms, 39.26 ms, 40.15 ms, 41.11 ms,
** persistent : 36.22 ms, 36.41 ms, 36.62 ms, 37.10 ms, 38.26 ms,
---
Running Python on an external Windows machine, one Wi-Fi hop from the BBB:
---
C:\Users\Loren\Documents\Projects\Computing\BeagleBone Black\BBB
Projects\1-Wire\OWFS Python logging>python StefanoTimingTest.py3
owserver://10.1.1.4:4304
pyownet: ver. 0.8.2 (C:\Apps\Python33\lib\site-packages\pyownet\__init__.py)
proxy_obj: ownet server at ('10.1.1.4', 4304)
server info: pid 22210, ver. unknown
timeit:
statement: proxy_obj.dir("/")
number: 20
repetitions: 5
** non persistent : 41.69 ms, 45.79 ms, 45.99 ms, 48.34 ms, 49.41 ms,
** persistent : 42.26 ms, 44.03 ms, 45.68 ms, 45.69 ms, 46.03 ms,
---
Between those two tests was a long learning session. For those who don't know...
In netstat, "0.0.0.0" addresses are accessible from outside machines, 127.0.0.1
addresses are not!
The localhost setting is in (at least) two places in /etc/owfs.conf:
! server: server = 10.1.1.4:4304 # localhost:4304 LA151105 allow net access
And:
server: port = 4304 # localhost:4304 LA151105 allow net access
After making those changes, I found "restart" does not notice them! You have to
use "force-reload":
ubuntu@arm:~/Lpkg$ sudo /etc/init.d/owserver force-reload
* Restarting 1-Wire TCP Server owserver
Suddenly it works from out on the network!
So I wonder why persistence makes less than 10% difference here, while on your
much faster machine it makes 25 to 40%...
| Loren Amelang | lo...@pacific.net |
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