Re: [beagleboard] Re: Recommendation to boot / resume Linux in less than a second...
Thank you very much Robert for that heads up... wasn't aware Sitara architecture could do this as well... Q: How does falcon boot on Sitara compare with sub-one-second boottime on i.MX6? On Wednesday, November 19, 2014 12:54:18 PM UTC-5, RobertCNelson wrote: http://www.denx.de/wiki/pub/U-Boot/MiniSummitELCE2013/2013-ELCE-U-Boot-Falcon-Boot.pdf http://git.denx.de/?p=u-boot.git;a=blob;f=doc/README.falcon;hb=HEAD -- For more options, visit http://beagleboard.org/discuss --- You received this message because you are subscribed to the Google Groups BeagleBoard group. To unsubscribe from this group and stop receiving emails from it, send an email to beagleboard+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
Re: [beagleboard] Re: Recommendation to boot / resume Linux in less than a second...
Hi John, thanks for the heads up on that patch. When you say it doesn't work at this time, is it because it's temporarily broken for embedded? If it gets fixed, would you recommend this patch for our needs? Q1: Given several senior devs are reporting amazing 1s boot-time on i.MX6, should I take from this it's the platform of choice for quick-booting Linux? Q2: Given the above, should I even consider hibernate-based solutions such as Warp? Q: Have you guys ever tried reducing boot-times through a hibernate-based solution? (e.g. Warp) How do these stackup versus efforts to fast-boot Linux as detailed in this thread? This won’t work at this time: http://www.spinics.net/lists/linux-omap/msg109331.html Regards, John -- For more options, visit http://beagleboard.org/discuss --- You received this message because you are subscribed to the Google Groups BeagleBoard group. To unsubscribe from this group and stop receiving emails from it, send an email to beagleboard+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
Re: [beagleboard] Re: Recommendation to boot / resume Linux in less than a second...
Hi Liyaoshi, thanks for reporting these incredible results!!! However your link appears broken, could you verify? Thanks man!! https://www.dropbox.com/s/ltnedy59gv5i70j/VID_20140723_084207.mp4 This is what I have done in my iMX6 solo @800M 16bit ddr board -- For more options, visit http://beagleboard.org/discuss --- You received this message because you are subscribed to the Google Groups BeagleBoard group. To unsubscribe from this group and stop receiving emails from it, send an email to beagleboard+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
Re: [beagleboard] Re: Recommendation to boot / resume Linux in less than a second...
Hi all, many thanks for this insightful discussion. Q: Is systemd a viable option to optimize boot-time on ARM embedded platforms? (Given its steeper learning curve are the results worth the extra work / risk over 'init'?) On Mon, Nov 10, 2014 at 1:42 PM, Dr. Michael J. Chudobiak m...@avtechpulse.com javascript: wrote: On 11/10/2014 03:37 PM, William Hermans wrote: systemd is supposed to make boot times even faster compared to the older / std debian init daemon. The problem I personally have with systemd, is that I'm oldschool Linux, know init fairly well, and can not find very good information about systemd on the web. systemd has a ton of documentation. Some useful bits: http://0pointer.de/blog/projects/blame-game.html http://www.freedesktop.org/wiki/Software/systemd/TipsAndTricks/ http://www.freedesktop.org/wiki/Software/systemd/ Using systemd-analyze plot plot.svg is hugely useful for identifying startup bottlenecks. -- For more options, visit http://beagleboard.org/discuss --- You received this message because you are subscribed to the Google Groups BeagleBoard group. To unsubscribe from this group and stop receiving emails from it, send an email to beagleboard+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
Re: [beagleboard] Re: Recommendation to boot / resume Linux in less than a second...
Supercool. We're hoping to reduce boot-time by using open-source based solutions so following the latest systemd-based efforts appears as the next logical step. Thanks a bunch for that useful advice!! On Tuesday, November 11, 2014 10:07:19 AM UTC-5, RobertCNelson wrote: Then Lennart released systemd and really just blew them out of the water... I did see a demo of timesys showing off something that booted even faster then systemd, but you'll pay lots of $ for it. -- For more options, visit http://beagleboard.org/discuss --- You received this message because you are subscribed to the Google Groups BeagleBoard group. To unsubscribe from this group and stop receiving emails from it, send an email to beagleboard+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
Re: [beagleboard] Re: Recommendation to boot / resume Linux in less than a second...
Q: Have you guys ever tried reducing boot-times through a hibernate-based solution? (e.g. Warp) How do these stackup versus efforts to fast-boot Linux as detailed in this thread? On Tuesday, November 11, 2014 12:13:20 PM UTC-5, Jean-Pierre Poulin wrote: Supercool. We're hoping to reduce boot-time by using open-source based solutions so following the latest systemd-based efforts appears as the next logical step. Thanks a bunch for that useful advice!! On Tuesday, November 11, 2014 10:07:19 AM UTC-5, RobertCNelson wrote: Then Lennart released systemd and really just blew them out of the water... I did see a demo of timesys showing off something that booted even faster then systemd, but you'll pay lots of $ for it. -- For more options, visit http://beagleboard.org/discuss --- You received this message because you are subscribed to the Google Groups BeagleBoard group. To unsubscribe from this group and stop receiving emails from it, send an email to beagleboard+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
Re: [beagleboard] Recommendation to boot / resume Linux in less than a second...
Hi William and Laurent, thank you for taking the time! What different results between the two of you! That 1 sec boot appears incredible! I've done similar efforts to William's approach a few years back and remember similar results but these were unfortunately quite far to our target. But that 1s to user-app on MX6 is really something... I wonder if the less powerful Sitara processor can approach such performance. Thank you for listing these steps... I'll try this out as soon as I can and hopefully can greatly reduce boot time. If this can be pulled off, then a hibernate solution would not be needed! Thanks again!! Jean-Pierre On Saturday, November 8, 2014 9:15:19 AM UTC-5, GONZALEZ Laurent wrote: JP, if you can afford twice your budget (1s!), you can try the path I went two years ago when I demonstrated fast boot on imx6, from power-on to V4L user app in less than 1s (915ms). What I did for this demo might apply to BBB/your_project, or not (I let you decide): * U-boot: use DMA to read from SDCard (eMMC sb. very similar, possibly better) * U-boot: load Kernel directly at its execution address (avoid memmove) * Load Linux uncompressed * no SMP, no power management * Compile as much as you can as modules * Build kernel with an early user space inside * The user application is init (bare Linux user app) These conditions may not met your design, at least it can brings you generic insights on Linux boot optimisations. Cheers, Laurent. On 07/11/2014 23:44, Jean-Pierre Poulin wrote: Hi BBB gurus! I’m trying to setup my BBB to wake-up from cold-boot to a functional user-space Linux app in the shortest amount of time. (Like 0.5 seconds) I understand that it is technically impossible to boot Linux this fast, thereby requiring a ‘hibernate’ type of solution… Could you point me toward the right direction? What lib / technique is best? Thanks a bunch! Jean-Pierre -- For more options, visit http://beagleboard.org/discuss --- You received this message because you are subscribed to the Google Groups BeagleBoard group. To unsubscribe from this group and stop receiving emails from it, send an email to beagleboard...@googlegroups.com javascript:. For more options, visit https://groups.google.com/d/optout. -- For more options, visit http://beagleboard.org/discuss --- You received this message because you are subscribed to the Google Groups BeagleBoard group. To unsubscribe from this group and stop receiving emails from it, send an email to beagleboard+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
[beagleboard] Re: Recommendation to boot / resume Linux in less than a second...
Hi RH, Thank you for your valuable input. I'm glad to see awesome results like Laurent was posting validated by another user. 1.6s is still incredible and totally useful for what we're doing. Are these results reported from a stock BBB? Are your sequence of steps similar to Laurent? Thank you again for sharing! Jean-Pierre I haven't tried to make mine boot fast and it's ready for business in 1.62s Boots from uSD. How fast does yours boot now? Yes I know that getting sub-1s is a long way from 1.62s. FWIW I never even payed attention to my boot time Oh, I guess I'm not counting u-boot time and there may be some ways to make that go faster. -- For more options, visit http://beagleboard.org/discuss --- You received this message because you are subscribed to the Google Groups BeagleBoard group. To unsubscribe from this group and stop receiving emails from it, send an email to beagleboard+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
[beagleboard] Re: Recommendation to boot / resume Linux in less than a second...
Hi Richard, thanks for those precisions... But what's your boot time? The last time I tested on older BB hardware felt around 12 sec +/- 1 sec. (Have to set it up again to get precise time via dmesg) Have to try this on BBB and I'm very encouraged to read about these sub-2 sec times!! FYI, I found an excellent TI resource on how to reduce boot time on Sitara chips here http://processors.wiki.ti.com/index.php/Sitara_Linux_Training:_Boot_Time_Reduction. Very detailed step-by-step instructions that appear very valuable for what we need to do. (Really worth a ready everyone!) -- For more options, visit http://beagleboard.org/discuss --- You received this message because you are subscribed to the Google Groups BeagleBoard group. To unsubscribe from this group and stop receiving emails from it, send an email to beagleboard+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
[beagleboard] Re: Recommendation to boot / resume Linux in less than a second...
Hi Richard, thanks for pointing this out... we can probably make our own but its good to know this right away. Will continue to investigate... looks like 3 sec is reasonable to attain but getting closer to 1 going to require external help and some hard structural choices on our part... :) Hmm, well they claim 3s boot time but you have to buy two capes to get there. A nand cape and memory expansion cape. The nand capes are not available. -- For more options, visit http://beagleboard.org/discuss --- You received this message because you are subscribed to the Google Groups BeagleBoard group. To unsubscribe from this group and stop receiving emails from it, send an email to beagleboard+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
[beagleboard] Recommendation to boot / resume Linux in less than a second...
Hi BBB gurus! I’m trying to setup my BBB to wake-up from cold-boot to a functional user-space Linux app in the shortest amount of time. (Like 0.5 seconds) I understand that it is technically impossible to boot Linux this fast, thereby requiring a ‘hibernate’ type of solution… Could you point me toward the right direction? What lib / technique is best? Thanks a bunch! Jean-Pierre -- For more options, visit http://beagleboard.org/discuss --- You received this message because you are subscribed to the Google Groups BeagleBoard group. To unsubscribe from this group and stop receiving emails from it, send an email to beagleboard+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
