Re: [Emc-users] quick boot
Agreed On Jun 17, 2012 12:05 AM, Przemek Klosowski przemek.klosow...@gmail.com wrote: On Thu, Jun 14, 2012 at 8:56 PM, Stuart Stevenson stus...@gmail.com wrote: I don't understand why the controller would be robust enough for a machine tool and not for a car. One reason might be the temperature ranges. A machine shop should stay between 5°C and 30°C while automotive temperature range is from -40°C to +125°C. -- Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users -- Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] quick boot
On Thu, Jun 14, 2012 at 8:56 PM, Stuart Stevenson stus...@gmail.com wrote: I don't understand why the controller would be robust enough for a machine tool and not for a car. One reason might be the temperature ranges. A machine shop should stay between 5°C and 30°C while automotive temperature range is from -40°C to +125°C. -- Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] quick boot
On 15 June 2012 01:54, Stuart Stevenson stus...@gmail.com wrote: I have not seen a car with open ECU software. There is always something *NOT * open even with an aftermarket configurable system. I was meaning open rather than Open inasmuch as OEM ECUs in most vehicles are locked down very tightly and won't even function outside their paired vehicle. Part of the point of the exercise is to have LinuxCNC controlling the motor and other functions. What is the application? I think that an Arduino would be adequate to control spark-only on a carburated engine. Conversely a three-core 1MHz PowerPC chip is running at about 80% CPU load on a modern common-rail diesel engine. (which will typically have about 3000 look-up tables, 40,000 other variables and a manual 4000 pages thick) In case you have missed it, I program engine control computers for a living. MegaSquirt seems pretty Open. The code is in assembler, but is available. http://www.megasquirt.info/ -- atp If you can't fix it, you don't own it. http://www.ifixit.com/Manifesto -- Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] quick boot
On 6/15/2012 5:29 AM, andy pugh wrote: On 15 June 2012 01:54, Stuart Stevensonstus...@gmail.com wrote: I have not seen a car with open ECU software. There is always something *NOT * open even with an aftermarket configurable system. I was meaning open rather than Open inasmuch as OEM ECUs in most vehicles are locked down very tightly and won't even function outside their paired vehicle. Part of the point of the exercise is to have LinuxCNC controlling the motor and other functions. What is the application? I think that an Arduino would be adequate to control spark-only on a carburated engine. Conversely a three-core 1MHz PowerPC chip is running at about 80% CPU load on a modern common-rail diesel engine. (which will typically have about 3000 look-up tables, 40,000 other variables and a manual 4000 pages thick) In case you have missed it, I program engine control computers for a living. MegaSquirt seems pretty Open. The code is in assembler, but is available. http://www.megasquirt.info/ Conversely a three-core 1MHz PowerPC chip is running at about 80% CPU load on a modern common-rail diesel engine. Did you mean 1 ghz? 80% CPU load on a modern common-rail diesel engine. Like the super duty 6.7? ;-) Dave -- Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] quick boot
Mark Cason wrote: Modern fuel injectors, are basically mini electric fuel pumps, and run non-stop. They run off of a PWM signal, which is altered, based on what the Oxygen (O2) sensors, and the Mass AirFlow sensor (MAF), are telling it. On every 4 cylinder engine that I've worked on (Esp. from the 90's), all the fuel injector operated off of the same PWM signal, which simplified things considerably. The main proponent for doing it that way, is that O2 sensors can only tell that the exhaust stream is running either lean, or rich. They can't really tell WHICH cylinder is causing the problem. I ran the full internal diagnostic scan on a Ford 6-cyl engine some years ago, and was amazed at the built-in diagnositcs of the system. That car had separate injection for each cylinder, and so they cut off one cylinder at a time to check injector balance (reading RPM dip and oxygen sensor changes), and then cut off one bank at a time to check variations between the Oxygen sensors. It was quite cool! Yes, a number of 4-cyl engines do things a bit simpler to save ECU hardware. Jon -- Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] quick boot
Gentlemen, I don't know for sure where it will lead but I have the mind set to use LinuxCNC for the entire motor and peripheral systems. I don't know if it will be one processor or more. Given that condition, let's address the motor ECU Does anyone have a suggestion for a board and chip set. thanks Stuart -- dos centavos -- Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] quick boot
Considering this is a development, I'd go with what we know works well, an Intel D525MW. That way you have the full array of other supported hardware that is also proven. Use that with a Mini-box wide input range power supply that survives engine cranks and you are on your way. The have a power supply card that is about $90 and it will supply over 200 watts of power while surviving the low battery voltages that occur when cranking the engine. It has sufficient power on the +12 volt and +5 volt lines to maintain the control power to the accessory cards and sensors during engine cranking, which will be very important (I think). I have one of those power supply cards and it works exactly as advertised. Once you get the software working, you can optimize the hardware, if so desired. Do you know how much voltage and drive current you need to trigger your fuel injectors? Sounds like a fun project. Dave On 6/15/2012 5:51 PM, Stuart Stevenson wrote: Gentlemen, I don't know for sure where it will lead but I have the mind set to use LinuxCNC for the entire motor and peripheral systems. I don't know if it will be one processor or more. Given that condition, let's address the motor ECU Does anyone have a suggestion for a board and chip set. thanks Stuart -- Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] quick boot
On 16 June 2012 03:08, Dave e...@dc9.tzo.com wrote: Use that with a Mini-box wide input range power supply that survives engine cranks You need to keep alive down to 7V in an automotive context. (well, at least to hit the -30C sign-off). As has been said, this sounds like an interesting project. I would like to help, and might have relevant knowledge. What is the engine, and why? -- atp If you can't fix it, you don't own it. http://www.ifixit.com/Manifesto -- Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] quick boot
Stuart Stevenson wrote: Gentlemen, I don't know for sure where it will lead but I have the mind set to use LinuxCNC for the entire motor and peripheral systems. I don't know if it will be one processor or more. Given that condition, let's address the motor ECU Does anyone have a suggestion for a board and chip set. Well, the Atom boards can be set up with a 12 V power supply, including ones designed to handle the voltage dip when starting. Since these things are used as car computers, there should at least be some info on how they handle wide temperature ranges. Then, if I was to get into such a project, I'd definitely want to get into FPGA programming, you can assemble all sorts of functions PWM, step pulses, encoder readers, counter/timer into one chip. But, there is a serious learning curve involved. And, NO, I am NOT volunteering! Jon -- Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] quick boot
On Jun 12, 2012, at 10:16 , Stuart Stevenson wrote: Gentlemen, What would it take to headless boot LinuxCNC in 3 seconds? thanks Stuart Coreboot can do that: http://www.coreboot.org/ -- Sebastian Kuzminsky -- Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] quick boot
Gentlemen, This exploration project is to find out if LinuxCNC would be a good base for an automotive engine control. Turn the key to on (or a bluetooth link from a key fob in proximity), push a button, three seconds or sooner the motor starts with LinuxCNC in full authority. Maybe with battery power to allow RF communications the boot would be a warm boot. thank you for the quick replies and links Stuart On Tue, Jun 12, 2012 at 12:07 PM, Joseph Chiu joec...@joechiu.com wrote: Oh, and one more thing -- I believe there is a kernel argument that you can pass to have console logging turned off. That can improve load time as well. I'm not sure what your definition of headless is, so I'm not sure how much this plays into your situtation. On Tue, Jun 12, 2012 at 10:05 AM, Joseph Chiu joec...@joechiu.com wrote: Not LinuxCNC specific, and going from the top of my head (it's been a long time since I hacked away at Linux kernel) -- booting in 3 seconds is a bit tough to do, even with SSD -- but the key thing is to strip as many services and dynamically loaded device drivers. If you can get the kernel image small enough, it *might* also be faster to have an uncompressed kernel (there's a disk I/O tradeoff versus the time spent unpacking the kernel). Some architectures are able to XIP execute-in-place, running the kernel directly out of ROM (typically FLASH) - it eliminates a bulk of the setup time to get the kernel running, however, ROM/FLASH access has traditionally been slower than RAM, so there's performance tradeoffs to consider there as well. This elinux.org page can give you some ideas on the performance improvement for uncompressed, and XIP kernels. These are non-PC architectures, though. http://elinux.org/Kernel_XIP On Tue, Jun 12, 2012 at 9:16 AM, Stuart Stevenson stus...@gmail.com wrote: Gentlemen, What would it take to headless boot LinuxCNC in 3 seconds? thanks Stuart -- dos centavos -- Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users -- Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users -- dos centavos -- Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] quick boot
Stuart Stevenson wrote: Gentlemen, What would it take to headless boot LinuxCNC in 3 seconds? You have to take all the crap out. There are a huge number of processes that start up at boot time (all those S## files in /etc/rc#.d directories) that can be removed. Get rid of DHCP, bluetooth, sendmail, ntpd, mysqld, and on and on. Some of these have delays waiting for a server to respond, which makes them even slower. If you remove something important then the system may no longer boot, you'll have to add the drive into a working system and put that process back. Jon -- Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] quick boot
Could you use Suspend/Resume instead? http://www.youtube.com/watch?v=Vzz1-FwIq28 Steve Stallings At Tue, 12 Jun 2012 09:16:28 -0700 (DST), you wrote Gentlemen, What would it take to headless boot LinuxCNC in 3 seconds? thanks Stuart -- dos centavos -- Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] quick boot
-BEGIN PGP SIGNED MESSAGE- Hash: SHA1 On 6/12/2012 11:16 AM, Stuart Stevenson wrote: Gentlemen, What would it take to headless boot LinuxCNC in 3 seconds? The fastest boot times I am aware of result from using LinuxBIOS, now known as coreboot: http://www.coreboot.org/Welcome_to_coreboot You need a supported motherboard/chipset, and you replace the on-board BIOS with the coreboot code. They claim 3 second boot times to a Linux console. - -- Charles Steinkuehler char...@steinkuehler.net -BEGIN PGP SIGNATURE- Version: GnuPG v1.4.11 (MingW32) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org/ iEYEARECAAYFAk/YgcsACgkQLywbqEHdNFxd3ACg8PA3G4bU5uW4ZJ4djATYBF80 n3AAni/WR+35PMc5cWa/48EsUEbiBvAV =K+Q7 -END PGP SIGNATURE- -- Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] quick boot
On 12 June 2012 18:31, Stuart Stevenson stus...@gmail.com wrote: This exploration project is to find out if LinuxCNC would be a good base for an automotive engine control. It could probably be done, but I think there are probably more appropriate platforms. I know that someone uses Ford EEC-IV modules as a data logger platform, and from what I saw of it the compiler was moderately conventional. Using one for its intended use would probably be easier. I think the problem with using LinuxCNC would be that there are only three fixed-period threads available, whereas vehicle ECUs tend to trigger various tasks at certain points in the crank revolution. (though there are 10mS and 100mS threads too for the less time-critical processes like sensor linearisation.) It might be easier still to just buy an open module from Emerald or similar. http://www.emeraldm3d.com/ -- atp If you can't fix it, you don't own it. http://www.ifixit.com/Manifesto -- Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] quick boot
An engine controller? That seems like the last place you'd want this. Latency/jitter scares me, as does the idea of a crashed controller because the hardware isn't robust enough. On Thu, Jun 14, 2012 at 4:06 PM, andy pugh bodge...@gmail.com wrote: On 12 June 2012 18:31, Stuart Stevenson stus...@gmail.com wrote: This exploration project is to find out if LinuxCNC would be a good base for an automotive engine control. It could probably be done, but I think there are probably more appropriate platforms. I know that someone uses Ford EEC-IV modules as a data logger platform, and from what I saw of it the compiler was moderately conventional. Using one for its intended use would probably be easier. I think the problem with using LinuxCNC would be that there are only three fixed-period threads available, whereas vehicle ECUs tend to trigger various tasks at certain points in the crank revolution. (though there are 10mS and 100mS threads too for the less time-critical processes like sensor linearisation.) It might be easier still to just buy an open module from Emerald or similar. http://www.emeraldm3d.com/ -- atp If you can't fix it, you don't own it. http://www.ifixit.com/Manifesto -- Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users -- Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] quick boot
On Thu, Jun 14, 2012 at 6:06 PM, andy pugh bodge...@gmail.com wrote: On 12 June 2012 18:31, Stuart Stevenson stus...@gmail.com wrote: This exploration project is to find out if LinuxCNC would be a good base for an automotive engine control. It could probably be done, but I think there are probably more appropriate platforms. I know that someone uses Ford EEC-IV modules as a data logger platform, and from what I saw of it the compiler was moderately conventional. Using one for its intended use would probably be easier. I think the problem with using LinuxCNC would be that there are only three fixed-period threads available, whereas vehicle ECUs tend to trigger various tasks at certain points in the crank revolution. (though there are 10mS and 100mS threads too for the less time-critical processes like sensor linearisation.) It might be easier still to just buy an open module from Emerald or similar. http://www.emeraldm3d.com/ It would be easier to purchase a running car with the features desired - if you could find one. I have not seen a car with open ECU software. There is always something *NOT * open even with an aftermarket configurable system. Part of the point of the exercise is to have LinuxCNC controlling the motor and other functions. -- atp If you can't fix it, you don't own it. http://www.ifixit.com/Manifesto -- Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users -- dos centavos -- Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] quick boot
On Thu, Jun 14, 2012 at 6:21 PM, Joseph Chiu joec...@joechiu.com wrote: An engine controller? That seems like the last place you'd want this. Latency/jitter scares me, as does the idea of a crashed controller because the hardware isn't robust enough. I don't understand why the latency/jitter would be any worse in this app rather than a machine tool. I don't understand why the controller would be robust enough for a machine tool and not for a car. -- dos centavos -- Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] quick boot
Are you going to run fuel injectors as well? I have a Ford Diesel truck and the fuel injector control box is larger than the ECU. I had some problems with the high pressure oil pump and at first thought the Fuel Injector control box was faltering. So now I have a spare. ;-) The fuel injection control box was an easier swap than the high pressure oil pump. My point is that there is a lot of specialized I/O involved in an engine control system. Dave On 6/14/2012 8:56 PM, Stuart Stevenson wrote: On Thu, Jun 14, 2012 at 6:21 PM, Joseph Chiujoec...@joechiu.com wrote: An engine controller? That seems like the last place you'd want this. Latency/jitter scares me, as does the idea of a crashed controller because the hardware isn't robust enough. I don't understand why the latency/jitter would be any worse in this app rather than a machine tool. I don't understand why the controller would be robust enough for a machine tool and not for a car. -- Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] quick boot
On Thu, Jun 14, 2012 at 8:18 PM, Dave e...@dc9.tzo.com wrote: Are you going to run fuel injectors as well? The car I have in mind is: 4 cylinder common rail fuel injection airflow sensor two oxygen sensors fuel pressure sensor does not have cam position sensor ignition timing is a crank position sensor throttle position sensor water temperature sensor head temperature sensor knock sensor would like absolute position feedback so the motor position is known prior to starting attempt that is all I can think of right now not an insurmountable obstacle me thinks -- dos centavos -- Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] quick boot
Joseph Chiu wrote: An engine controller? That seems like the last place you'd want this. Latency/jitter scares me, as does the idea of a crashed controller because the hardware isn't robust enough. Well, I think you really need some attached hardware, and that could have a watchdog timer to shut down if the computer/program fails. At high RPM, things are happening way too fast for direct CPU control, things like ignition and injection timing. Some triggered counter/timers and PWM modules could do what you need. I'd choose an FPGA, but I suspect you can get add-on chips that can do these functions. Possibly something like the Beagle Bone with an additional board would do it. But, of course, no RT on that, yet. Jon -- Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] quick boot
I know there is an appeal for a controller that can do wifi and other neat things, but just in case this could be the solution you didn't know you needed: http://www.megasquirt.info/ A few years back an open engine controller was designed. I think this is the latest version of it. The advantage is that ALL the features are documented and there is forum help if you're having troubles. This gets you further down the development road quicker. On 06/12/2012 01:31 PM, Stuart Stevenson wrote: Gentlemen, This exploration project is to find out if LinuxCNC would be a good base for an automotive engine control. -- Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] quick boot
Stuart Stevenson wrote: It would be easier to purchase a running car with the features desired - if you could find one. I have not seen a car with open ECU software. There is always something *NOT * open even with an aftermarket configurable system. Part of the point of the exercise is to have LinuxCNC controlling the motor and other functions. Well, the complexity these days is that the ECU controls EVERYTHING! So, not only do you have spark and injection, you probably have AC control, emissions control, thermal control, alternator regulation, and the transmission as well. And, most of that stuff will not be well documented, so you would have to do a lot of trial and error. It might be possible to put the transmission in two gears at once and cause gear breakage, for instance. Jon -- Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] quick boot
Stuart Stevenson wrote: On Thu, Jun 14, 2012 at 8:18 PM, Dave e...@dc9.tzo.com wrote: Are you going to run fuel injectors as well? The car I have in mind is: 4 cylinder common rail fuel injection airflow sensor two oxygen sensors fuel pressure sensor does not have cam position sensor ignition timing is a crank position sensor throttle position sensor water temperature sensor head temperature sensor knock sensor would like absolute position feedback so the motor position is known prior to starting attempt that is all I can think of right now There will be an air mixer sensor and control (choke stove) and a control for the EGR valve, and possibly smog pump. Unless it is pretty old, with a hydromechanical transmission, that is likely integrated into the ECU, unless it is a manual transmission. Jon -- Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] quick boot
Yeah, what Jon said! :-p I'm assuming that you need something to control an engine at 2kHz (12 kRPM). Assuming you want 1 degree accuracy in response, that means a responsiveness at about 720 kHz, while handling multiple inputs. I don't think you want to do that with unassisted CPU. An MCU with tons of peripherals seem more appropriate, even if the core is runing at a more stately pace. Doing it on a TI Omap (Beaglebone) sounds much more reasonable, but I'd still be a little wary without a detailed timing analysis. As for reliability... This is going in a car that shakes rattles and rolls, and bakes and freezes? The motherboard probably will not survive for much more than a year, unless you spec a ruggedized industrial one. On Jun 14, 2012 7:27 PM, Jon Elson el...@pico-systems.com wrote: Joseph Chiu wrote: An engine controller? That seems like the last place you'd want this. Latency/jitter scares me, as does the idea of a crashed controller because the hardware isn't robust enough. Well, I think you really need some attached hardware, and that could have a watchdog timer to shut down if the computer/program fails. At high RPM, things are happening way too fast for direct CPU control, things like ignition and injection timing. Some triggered counter/timers and PWM modules could do what you need. I'd choose an FPGA, but I suspect you can get add-on chips that can do these functions. Possibly something like the Beagle Bone with an additional board would do it. But, of course, no RT on that, yet. Jon -- Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users -- Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] quick boot
Go buy a microsquirt. Its the LinuxCNC of the ECU world. Stephen The car I have in mind is... -- Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] quick boot
On 06/14/2012 09:36 PM, Jon Elson wrote: Stuart Stevenson wrote: It would be easier to purchase a running car with the features desired - if you could find one. I have not seen a car with open ECU software. There is always something *NOT * open even with an aftermarket configurable system. Part of the point of the exercise is to have LinuxCNC controlling the motor and other functions. Well, the complexity these days is that the ECU controls EVERYTHING! So, not only do you have spark and injection, you probably have AC control, emissions control, thermal control, alternator regulation, and the transmission as well. And, most of that stuff will not be well documented, so you would have to do a lot of trial and error. It might be possible to put the transmission in two gears at once and cause gear breakage, for instance. Jon An easy solution, would be to have 2 computers. One to run the engine, and another to run everything else. Not a too far fetched idea, considering some of the better luxury cars, have multiple computers, spread out over the body, with multiple 1 wire, and CAN bus sensors, per computer, all talking to a MCP (for lack of a better word). A modern engine, running at a exaggerated speed of say 10,000 rpm's, will be firing 2 coil packs every rotation, or 166.667 times per second, times 2. Only 3 sensors are needed to make this work, a crank angle sensor, with a multitooth sprocket, a cam angle sensor, that is read once per revolution, and a Throttle Position Sensor (TPS). Modern fuel injectors, are basically mini electric fuel pumps, and run non-stop. They run off of a PWM signal, which is altered, based on what the Oxygen (O2) sensors, and the Mass AirFlow sensor (MAF), are telling it. On every 4 cylinder engine that I've worked on (Esp. from the 90's), all the fuel injector operated off of the same PWM signal, which simplified things considerably. The main proponent for doing it that way, is that O2 sensors can only tell that the exhaust stream is running either lean, or rich. They can't really tell WHICH cylinder is causing the problem. So, for the bare minimum to get a engine to run, you would need to read 6 inputs, and 3 outputs, in realtime: The inputs are: crank angle sensor, and cam angle sensor, which is basically a rotary encoder, with index. 1 potentiometer (TPS), and 3 analog inputs, O2 x 2, and MAF. The outputs are: 1 pwm signal, for the injectors, and 1 output for each of the coils. Those sensors, are THE most important sensors on the engine. All other sensors on the engine such as RPM's, water temperature, vacuum, oil pressure, etc... all play a roll, but in a minor capacity, and as such, can be read once every couple of seconds or so. Hardware wise, it's all doable. It's on the software side of things, that everything gets tricky. The air/fuel mixture is fairly straightforward, and runs in it's own loop, independent of everything else. it's leading the spark (advance), based upon the RPM's of the engine, TPS position, and just how lean the exhaust is at that precise time, is where everything gets tricky. And, this isn't even getting into the drivetrain, cruise control, braking, charging systems, ride quality, and environmental control... -- -Mark Ne M'oubliez ---Family Motto Hope for the best, plan for the worst ---Personal Motto -- Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] quick boot
This got me wondering how fast my new 525 and sata HD is . So I got the stopwatch out: 8 sec to the main screen(about time to turn on the air, check the oil level and walk around to the front to the front of my machine. not too shabby, but not near 3 sec. Terry - Original Message - From: Eric H. Johnson ejohn...@camalytics.com To: 'Enhanced Machine Controller (EMC)' emc-users@lists.sourceforge.net Cc: Sent: Tuesday, June 12, 2012 12:35 PM Subject: Re: [Emc-users] quick boot On 6/12/2012 12:16 PM, Stuart Stevenson wrote: Gentlemen, What would it take to headless boot LinuxCNC in 3 seconds? thanks Stuart This article is almost 4 years old but it's got some good hints about fast booting. http://lwn.net/Articles/299483/ It points out a cool tool name BootChart that helps identify the bottlenecks. http://www.bootchart.org/ I still don't know about getting down to 3 seconds, but in addition to what that article says, you can also try: 1 Set BIOS to quick boot, bypass POST, etc. 2 In BIOS set boot drive as first device in boot order. 3 Use a SATA SSD. 4 Use as much memory as the mother board will accommodate. 5 Use Xubuntu instead of ubuntu (Use Linuxcnc install script). 6 Play with grub boot parameters (i.e. remove quiet splash). 7 Map log files to null or RAM (see: http://wiki.linuxcnc.org/cgi-bin/wiki.pl?Install_To_CompactFlash) 8 Uninstall any unnecessary applications. 9 Use bum (boot-up manager) to remove unnecessary services. Regards, Eric -- Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users -- Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
[Emc-users] quick boot
Gentlemen, What would it take to headless boot LinuxCNC in 3 seconds? thanks Stuart -- dos centavos -- Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] quick boot
On 6/12/2012 12:16 PM, Stuart Stevenson wrote: Gentlemen, What would it take to headless boot LinuxCNC in 3 seconds? thanks Stuart This article is almost 4 years old but it's got some good hints about fast booting. http://lwn.net/Articles/299483/ It points out a cool tool name BootChart that helps identify the bottlenecks. http://www.bootchart.org/ Regards, Kent -- Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] quick boot
Not LinuxCNC specific, and going from the top of my head (it's been a long time since I hacked away at Linux kernel) -- booting in 3 seconds is a bit tough to do, even with SSD -- but the key thing is to strip as many services and dynamically loaded device drivers. If you can get the kernel image small enough, it *might* also be faster to have an uncompressed kernel (there's a disk I/O tradeoff versus the time spent unpacking the kernel). Some architectures are able to XIP execute-in-place, running the kernel directly out of ROM (typically FLASH) - it eliminates a bulk of the setup time to get the kernel running, however, ROM/FLASH access has traditionally been slower than RAM, so there's performance tradeoffs to consider there as well. This elinux.org page can give you some ideas on the performance improvement for uncompressed, and XIP kernels. These are non-PC architectures, though. http://elinux.org/Kernel_XIP On Tue, Jun 12, 2012 at 9:16 AM, Stuart Stevenson stus...@gmail.com wrote: Gentlemen, What would it take to headless boot LinuxCNC in 3 seconds? thanks Stuart -- dos centavos -- Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users -- Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] quick boot
Oh, and one more thing -- I believe there is a kernel argument that you can pass to have console logging turned off. That can improve load time as well. I'm not sure what your definition of headless is, so I'm not sure how much this plays into your situtation. On Tue, Jun 12, 2012 at 10:05 AM, Joseph Chiu joec...@joechiu.com wrote: Not LinuxCNC specific, and going from the top of my head (it's been a long time since I hacked away at Linux kernel) -- booting in 3 seconds is a bit tough to do, even with SSD -- but the key thing is to strip as many services and dynamically loaded device drivers. If you can get the kernel image small enough, it *might* also be faster to have an uncompressed kernel (there's a disk I/O tradeoff versus the time spent unpacking the kernel). Some architectures are able to XIP execute-in-place, running the kernel directly out of ROM (typically FLASH) - it eliminates a bulk of the setup time to get the kernel running, however, ROM/FLASH access has traditionally been slower than RAM, so there's performance tradeoffs to consider there as well. This elinux.org page can give you some ideas on the performance improvement for uncompressed, and XIP kernels. These are non-PC architectures, though. http://elinux.org/Kernel_XIP On Tue, Jun 12, 2012 at 9:16 AM, Stuart Stevenson stus...@gmail.comwrote: Gentlemen, What would it take to headless boot LinuxCNC in 3 seconds? thanks Stuart -- dos centavos -- Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users -- Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] quick boot
On 6/12/2012 12:16 PM, Stuart Stevenson wrote: Gentlemen, What would it take to headless boot LinuxCNC in 3 seconds? thanks Stuart This article is almost 4 years old but it's got some good hints about fast booting. http://lwn.net/Articles/299483/ It points out a cool tool name BootChart that helps identify the bottlenecks. http://www.bootchart.org/ I still don't know about getting down to 3 seconds, but in addition to what that article says, you can also try: 1 Set BIOS to quick boot, bypass POST, etc. 2 In BIOS set boot drive as first device in boot order. 3 Use a SATA SSD. 4 Use as much memory as the mother board will accommodate. 5 Use Xubuntu instead of ubuntu (Use Linuxcnc install script). 6 Play with grub boot parameters (i.e. remove quiet splash). 7 Map log files to null or RAM (see: http://wiki.linuxcnc.org/cgi-bin/wiki.pl?Install_To_CompactFlash) 8 Uninstall any unnecessary applications. 9 Use bum (boot-up manager) to remove unnecessary services. Regards, Eric -- Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] quick boot
BTW, why 3 seconds? It might help to know what you're trying to achieve - is it a device safety issue, or more of a usability thing? On Tue, Jun 12, 2012 at 10:35 AM, Eric H. Johnson ejohn...@camalytics.comwrote: On 6/12/2012 12:16 PM, Stuart Stevenson wrote: Gentlemen, What would it take to headless boot LinuxCNC in 3 seconds? thanks Stuart This article is almost 4 years old but it's got some good hints about fast booting. http://lwn.net/Articles/299483/ It points out a cool tool name BootChart that helps identify the bottlenecks. http://www.bootchart.org/ I still don't know about getting down to 3 seconds, but in addition to what that article says, you can also try: 1 Set BIOS to quick boot, bypass POST, etc. 2 In BIOS set boot drive as first device in boot order. 3 Use a SATA SSD. 4 Use as much memory as the mother board will accommodate. 5 Use Xubuntu instead of ubuntu (Use Linuxcnc install script). 6 Play with grub boot parameters (i.e. remove quiet splash). 7 Map log files to null or RAM (see: http://wiki.linuxcnc.org/cgi-bin/wiki.pl?Install_To_CompactFlash) 8 Uninstall any unnecessary applications. 9 Use bum (boot-up manager) to remove unnecessary services. Regards, Eric -- Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users -- Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] quick boot
Could you use Suspend/Resume instead? http://www.youtube.com/watch?v=Vzz1-FwIq28 Steve Stallings At Tue, 12 Jun 2012 09:16:28 -0700 (DST), you wrote Gentlemen, What would it take to headless boot LinuxCNC in 3 seconds? thanks Stuart -- dos centavos -- Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] quick boot
I liked whatever you got when my parents where up (the connies supreme or something..) does that mean we cannot get scheduled until the first week of july - or that he won't even be able to look at it until july? On 6/12/2012 12:59 PM, steve...@newsguy.com wrote: Could you use Suspend/Resume instead? http://www.youtube.com/watch?v=Vzz1-FwIq28 Steve Stallings At Tue, 12 Jun 2012 09:16:28 -0700 (DST), you wrote Gentlemen, What would it take to headless boot LinuxCNC in 3 seconds? thanks Stuart -- dos centavos -- Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users -- Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] quick boot
Sorry - disregard.. ;) (glad it wasn't too embarrassing) On 6/12/2012 1:39 PM, sam sokolik wrote: I liked whatever you got when my parents where up (the connies supreme or something..) does that mean we cannot get scheduled until the first week of july - or that he won't even be able to look at it until july? On 6/12/2012 12:59 PM, steve...@newsguy.com wrote: Could you use Suspend/Resume instead? http://www.youtube.com/watch?v=Vzz1-FwIq28 Steve Stallings At Tue, 12 Jun 2012 09:16:28 -0700 (DST), you wrote Gentlemen, What would it take to headless boot LinuxCNC in 3 seconds? thanks Stuart -- dos centavos -- Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users -- Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users -- Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] quick boot
One more: Use a fixed IP address to avoid negotiating DHCP. Regards, Eric I still don't know about getting down to 3 seconds, but in addition to what that article says, you can also try: 1 Set BIOS to quick boot, bypass POST, etc. 2 In BIOS set boot drive as first device in boot order. 3 Use a SATA SSD. 4 Use as much memory as the mother board will accommodate. 5 Use Xubuntu instead of ubuntu (Use Linuxcnc install script). 6 Play with grub boot parameters (i.e. remove quiet splash). 7 Map log files to null or RAM (see: http://wiki.linuxcnc.org/cgi-bin/wiki.pl?Install_To_CompactFlash) 8 Uninstall any unnecessary applications. 9 Use bum (boot-up manager) to remove unnecessary services. -- Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
