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toscalix | As announced by mail, GDP call moves to Wed at 16:00 UTC | 11:13 |
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toscalix | GENIVI Tools Team meeting remains unchanged | 11:13 |
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sanjeev | I was able to successfully build the AGL repo following https://wiki.automotivelinux.org/agl-distro/source-code. | 11:25 |
sanjeev | I would now like to test the demo platform using qemu | 11:25 |
sanjeev | I couldnt find any instructions about it | 11:26 |
sanjeev | can someone help me ? | 11:26 |
sanjeev | I found this to work. http://lists.linuxfoundation.org/pipermail/automotive-discussions/2015-November/001186.html | 11:38 |
sanjeev | thanks | 11:38 |
jbocklage | @sanjeev: hi. you were sooooooooo close to it: Scroll down the page you mentioned. Then click the README.md file | 11:47 |
jbocklage | tl;dr: https://git.automotivelinux.org/gerrit/gitweb?p=AGL/meta-agl.git;a=blob_plain;f=README.md;hb=HEAD | 11:48 |
sanjeev | yes, I ran the CES 2016 demo - all good. | 11:48 |
sanjeev | thanks jbocklage. | 11:49 |
jbocklage | yw | 11:50 |
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jlrmagnus | So. I messed around with a DBUS signal replacement mechanism during the weekend. | 17:16 |
jlrmagnus | Using localhost UDP/IP broadcasts, each packet bundling 32 signals, I reached a max throughput of 1M sent signals and 52M consumed signals at a 45% total CPU load. | 17:17 |
jlrmagnus | This was with 2 producers and 50 receivers. | 17:18 |
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jlrmagnus | WIth DBUS, using python, we got 30K signals with a single sender and receiver pair. | 17:18 |
jlrmagnus | The DBUS solution does not scale for signals since you have to do a separate UNIX socket write for each subsriber. | 17:19 |
jlrmagnus | I'll run some more tests and post to the projects list. | 17:19 |
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parco | hey guys, anyone who might be familiar with the J1939 diag connector, i was wondering how large of a voltage could be on the power pin? | 17:55 |
parco | it says the power pin should be VBattery | 17:55 |
parco | do all semi-trucks, heavy duty trucks have 12-24V batteries? | 17:56 |
jlrmagnus | parco, We may not be the right people to answer this. We mostly work with Infotainment software and have limited electric system knowledge. | 17:58 |
jlrmagnus | ... apart from in-vehicle data buses. | 17:58 |
radiofree | jlrmagnus: what are the purpose of these tests? | 18:01 |
radiofree | you want to replace dbus? | 18:01 |
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jlrmagnus | radiofree, DBUS is too slow for the signaling load that we will need. | 18:41 |
jlrmagnus | So we are investigating alternatives. Please note, however, that for RPC calls, DBUS is still our main target. | 18:42 |
jlrmagnus | (us=JLR) | 18:42 |
ulf` | jlrmagnus: Kdbus :) | 18:51 |
jlrmagnus | ulf`, Very dubious future for that one. We spoke to Greg, and there seemed to be no clear path forward. | 18:51 |
jlrmagnus | kdbus would have been nice, though. | 18:51 |
ulf` | jlrmagnus: sigh | 18:52 |
jlrmagnus | Yep. You and me both: sigh. | 18:52 |
jlrmagnus | We are sniffing around a mmap/futex solution that would allow us to do signalling without leaving userspace. | 18:55 |
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ulf` | jlrmagnus: What's the matter with setting a kdbus direction? I thought systemd developers and RedHat are actively driving this? | 19:25 |
jlrmagnus | From Rudi Streif's email after him talking to GregKH | 19:33 |
jlrmagnus | Essentially, kdbus in its current form will not make it into the kernel. Apparently, there were some design issues although GregKH did not elude to what they are. | 19:33 |
jlrmagnus | eom | 19:33 |
jlrmagnus | I don't know anything further than that | 19:33 |
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