--- Log opened Wed Jul 29 00:00:55 2015
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04:02 #navit: < robertp> hi there
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04:13 #navit: < youyeg> anybody's home?
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05:11 #navit: < rcorello> robertp: i'd also be interested in a multi-threaded routing engine
05:11 #navit: < rcorello> does anyone happen to know where the hot spots of the routing code are?
05:12 #navit: < rcorello> i seem to recall that it's not so much about the dijkstra implementation itself.. or am i mistaken?
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06:04 #navit: < robertp> rcorello: is your rotary code in the master branch? i cant find it in the code...
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06:52 #navit: < robertp> i d say in navit/route.c is the routing algorithm
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11:32 #navit: < Marc0> KaZeR: yes, I have an Alcatel One Touch
11:32 #navit:  * Marc0 will be away for an hour or so
11:33 #navit: <@KaZeR> hi there
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12:02 #navit: < rcorello> robertp: the rotary stuff is not merged yet. you can find it here: https://github.com/greg42/navit/commits/master
12:04 #navit: < rcorello> robertp: yes, the location of the routing code is obvious :) the locations inside the code that cost most cpu time not so much (to me)..
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12:25 #navit: < robertp> hi again
12:31 #navit: < robertp> i saw greg42's latest pull request. what are the tests there?
12:47 #navit: <@KaZeR> robertp: tests ?
13:03 #navit: < robertp> it said, that tests are failed
13:03 #navit: < robertp> i was searching for the code in my fork from navit-gps but i doubt its merged
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13:14 #navit: < KaZeR_> the code in your fork? which code ?
13:14 #navit: < Marc0> back again
13:15 #navit: < KaZeR_> robertp: a primer about our tests : http://wiki.navit-project.org/index.php/Testing_and_CI_strategy
13:15 #navit: < robertp> i forked recently to put a working mp3player into navit
13:16 #navit: < robertp> i wanted to have greg42's rotary code in, too.
13:16 #navit: < robertp> but its not there.
13:25 #navit: < KaZeR_> ha
13:25 #navit: < KaZeR_> no the PR is not merged yet
13:26 #navit: < KaZeR_> i can have a look at that probably today
13:27 #navit: < robertp> thank you im in no hurry ;)
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14:41 #navit: < tryagain> robertp I saw your yesterday question on multithreaded navit routing.  Have you tried the patch from http://trac.navit-project.org/ticket/1258 ?
14:45 #navit: < tryagain> But beforehand i think you should measure your disk (sd) IO performance. I guess it could be the bottelneck. Then using more cores for calculation wouldn't help very much. A good sign for splitting routing  to multiple threads/cores would be a near-100% load of one cpu core during route calculation.
14:46 #navit: < tryagain> But your results look for me like even one core of your cpu is too fast to compared to your disk subsystem.
14:46 #navit: < tryagain> s/fast to/fast/
14:57 #navit: < tryagain>  gernot_ why do you stick to tomtom devices? I'm afraid 64mb may appear not very usable in a dense city road network. OSM data became much more accurate these days, and memory requrements of navit grew significantly just because of that.
15:06 #navit: <@KaZeR> hey tryagain
15:11 #navit: < robertp> i had 28% cpu load while navit was calculating a route. so i think one core (25%) was busy and the three other cores were idle
15:12 #navit: < tryagain> hey KaZeR
15:14 #navit: < tryagain> robertp i see. Are you sure you have 100% load when all four cores are loaded at 100%? I think top shows sum(load[i]). So it would display 400% for fully loaded quad core system.
15:15 #navit: < robertp> i didnt watch top. i watched the cpu load monitor in the lxde panel
15:16 #navit: < tryagain> if you're sure you have one core loaded at 100% then it's a good idea to try that patch
15:19 #navit: < tryagain> i'm unsure if it would apply to the current svn revision, but you may fetch an older revision and apply the patch over it. I do not think we had significant routing performance changes recently. Just make sure you use same routing profile settings in both runs.
15:33 #navit: < tryagain> btw if you want to play with cpu/io balance, of some interest would be to change  -z option of maptool. If you decrease compression level (down to "store" level) you should get less cpu load in the cost of more IO load.
15:36 #navit: < robertp> thanks ill try tomorrow. i was just puzzled why navit is stuck while cpu load is not at 100%
15:37 #navit: < tryagain> navit is one-threaded
15:53 #navit: < robertp> i have to leave, bye.
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17:14 #navit: < gernot_> hi
17:16 #navit: < gernot_> tryagain: I stick to tomtom because i like linux and don't like andruid.
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17:19 #navit: < gernot_> tryagain: I have to use swap in munich. With some compromise its usable.
17:25 #navit: < gernot_> tryagain: i'd prefer a banana pi with touchscreen, but you need external gps plus maybe accu,and speaker.
17:25 #navit: < gernot_> by
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--- Log closed Thu Jul 30 00:00:56 2015