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Nov 6, 2009 1:29pm
User_img_not_found_04_med pperrone 4 posts

Does anyone know of a way to decrease the startup/boot time for the system? I’ve heard rumor of Linux distros that can be pared down to yield 4 second start times…but have yet to see how it is done…and if so, could it be done for the Bug?

Nov 7, 2009 12:50pm
Medium Bug Labs team kgilmer 215 posts

 

Hi pperrone,

  Well, first off you’ll be happy to know that our next version (currently in QA) will boot faster by many seconds.  But in general, you can increase boot time simply by removing programs at start that you don’t need.  For example if you do not need a GUI you can remove matchbox.  Or, if you do not need wireless networking you can remove connman.  These files are contained in /etc/rc[1,3,5].d directories on the BUG.

hope that helps

ken

Nov 9, 2009 6:26pm
User_img_not_found_04_med pperrone 4 posts

Thank you Ken. The names in /etc/rc.x.d are sometimes cryptic. Is there a list of the programs launched at start along with their names in the /etc/rc.x.d directories so that we can better assess which ones we need and which ones we don’t need?

Also, any rough sense, if after we go through the above steps, how much improvement we’d get on boot time? For use as an embedded controller in some of our apps, we’d need the boot time to be under 4 seconds. If we had it down to 15 seconds, it would be worth considering still. But beyond that, it if the above steps don’t get us anywhere near these targets, it would be helpful to know before we embark down that path.

Thanks!!

Paul

Nov 10, 2009 12:45pm
User_img_not_found_04_med pperrone 4 posts

FYI…I removed the S22connman files from rc2 and rc3, and I set the run level to 3 in /etc/inittab. The BugBase doesn’t reboot after doing that.

Nov 10, 2009 12:51pm
Medium Bug Labs team kgilmer 215 posts

 

Paul,

  Yes, you’ll need to keep the runlevel at 5.  To get the kind of speed you are looking for more radical measures will be in order.  I suggest you build a kernel with a stripped-down rootfs and boot that from flash using initfs.  Doing this will require pretty solid knowledge of Linux and OpenEmbedded.  Customizing the existing BUG production release will not result in anywhere near the boot time you are looking for.

hope that helps

ken

Nov 10, 2009 1:08pm
User_img_not_found_04_med pperrone 4 posts

Thanks Ken. Indeed, we’re not interested in doing our own Linux install. Would rather leverage what someone else has done to provide a rapid boot strap.

Anyway, any hints on SSH-ing back into the Bug or somehow getting back into it after setting the runlevel to 3, so that we can set it back to 5?

 

Best,

 

Paul

Nov 10, 2009 4:04pm
Medium Bug Labs team kgilmer 215 posts

 

Paul,

  Can you mount the SD card in a Linux PC?  If so you can mount it and modify the init level from there.  You’ll need a SD card reader.

thx

ken

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