Re: Super Fast Boot of Embedded Linux: 300 ms from boot loader to shell
Hi, Marco Stornelli a écrit : Il 13/04/2011 16:53, Constantine Shulyupin ha scritto: Thank you Marco for your feedback. I've added summary of used optimization method: • Reduction of kernel and filesystem size • Kernel features: naked boot, initrd without compression • Optimization of NAND flash interface in boot loader • Boot time was measured with utility tstamp • You can find more detailed list of methods at http://elinux.org/Boot_Time • Techniques for improving embedded Linux startup time, presentation: http://www.makelinux.com/emb/fastboot/MontaVista Actually, detailed implementations of optimization methods are described in numerous documents. I really know. I was talking about *your* optimization method, but if I well understand you've just applied a list of well known methods. Not to say such case are not interesting : loading a linux kernel with only a serial driver, a ramdisk and a shell as init doesn't reflect reality. In real product what you want if fast user interaction (sound, mounting big filesystem with user data, lcd display, ...) Matthieu -- To unsubscribe from this list: send the line unsubscribe linux-embedded in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
Re: Super Fast Boot of Embedded Linux: 300 ms from boot loader to shell
On Thu, Apr 14, 2011 at 09:43:35AM +0200, Matthieu CASTET wrote: Not to say such case are not interesting : loading a linux kernel with only a serial driver, a ramdisk and a shell as init doesn't reflect reality. In real product what you want if fast user interaction (sound, mounting big filesystem with user data, lcd display, ...) Well, it depends on the application. In the automotive box I've shown the barebox based boot optimizations for in my ELC-E talk, the task is to get CAN communication running in 200 ms. For that kind of application it's useful to be in userspace as fast as possible, just in order to have one socket-can application running, and everything else comes later. rsc -- Pengutronix e.K. | | Industrial Linux Solutions | http://www.pengutronix.de/ | Peiner Str. 6-8, 31137 Hildesheim, Germany | Phone: +49-5121-206917-0| Amtsgericht Hildesheim, HRA 2686 | Fax: +49-5121-206917- | -- To unsubscribe from this list: send the line unsubscribe linux-embedded in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
Re: Super Fast Boot of Embedded Linux: 300 ms from boot loader to shell
Il 13/04/2011 16:53, Constantine Shulyupin ha scritto: Thank you Marco for your feedback. I've added summary of used optimization method: • Reduction of kernel and filesystem size • Kernel features: naked boot, initrd without compression • Optimization of NAND flash interface in boot loader • Boot time was measured with utility tstamp • You can find more detailed list of methods at http://elinux.org/Boot_Time • Techniques for improving embedded Linux startup time, presentation: http://www.makelinux.com/emb/fastboot/MontaVista Actually, detailed implementations of optimization methods are described in numerous documents. I really know. I was talking about *your* optimization method, but if I well understand you've just applied a list of well known methods. -- To unsubscribe from this list: send the line unsubscribe linux-embedded in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
Super Fast Boot of Embedded Linux: 300 ms from boot loader to shell
Hello all, Make Linux Software presents the fastest ever embedded Linux boot for 720 MHz ARM and NAND flash memory. Linux boot time is 300 milliseconds from boot loader to shell. The first goal of the project is to achieve a minimal boot time of a minimal but functional Linux system on common hardware. The second goal is to provide a platform for developing more functional systems with an even minimized boot time. Video of boot process: http://youtu.be/747XLVbTgA4 Boot log with timestamps: 0.000 0.000: TI X-Loader 1.4.4ss Mar 26 2011 01:45:43 0.000 0.000: Optimised by www.MakeLinux.com 0.000 0.000: Loading 0.237 0.237: Running 0.237 0.000: CFG_LOADADDR=80008000 0.249 0.012: *(int*)CFG_LOADADDR=e321f0d3 0.276 0.027: Linux version 2.6.32 (co...@makelinux.com) 0.276 0.000: Starting application 0.296 0.020: BusyBox v1.16.2 hush - the humble shell To learn more, please visit http://www.makelinux.com/emb/fastboot/omap Thanks. -- Constantine Shulyupin http://www.MakeLinux.com/ Embedded Linux Systems, Device Drivers, TI DaVinci -- To unsubscribe from this list: send the line unsubscribe linux-embedded in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
Re: Super Fast Boot of Embedded Linux: 300 ms from boot loader to shell
Il 11/04/2011 16:02, Constantine Shulyupin ha scritto: Hello all, Make Linux Software presents the fastest ever embedded Linux boot for 720 MHz ARM and NAND flash memory. Linux boot time is 300 milliseconds from boot loader to shell. The first goal of the project is to achieve a minimal boot time of a minimal but functional Linux system on common hardware. The second goal is to provide a platform for developing more functional systems with an even minimized boot time. Hi, is it a marketing announcement or a presentation of an innovative solution? In the first case don't send this kind of email to this mailing list. In the second one, could you explain to us your fast boot solution or your kernel modifications? I can't find any implementation details on the web site. Marco -- To unsubscribe from this list: send the line unsubscribe linux-embedded in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
