Hard Real time kernel

Hi, This might not be the right place, but Sun used to sell a real "hard real time", kernel. I cant seem to find any reference to this on their site anymore. Does it still exist ?, can we still buy it ?, where do I go to find out more information ?.
TIA
Michael

broch wrote:first I hope that you understand that RT kernels on desktops are slower than preempt default or vanilla kernel?
I'm using one on my Mandriva 2008.0 and didn't notice any slowdown.
broch wrote:second: I use grsec (or RSBAC) kernels.
grsec will not work with anything messing up with memory (even Kolivas patches in past had issues with grsec). This can be fixed but then what is the point of enabling hardened kernel with disabled features?
I simply patch vanilla with grsec.
Remember that some pax options are incompatible with X (all explained when option is selected, so no way to make mistake)
finally it works well lowest overhead, best speed and easies to manage among kernel hardening patches (I do not count Apparmor, as this is rather limited tool)
If I understood you, then it's a choice between real time and more security, right?

Similar Messages

  • Real Time kernel questions

    I decided to compile myself a new kernel using a PKGBUILD from AUR, which contains Ingo Molnar's real time patch. I know that there are some entries int the wiki about this (Kernel Compilation with ABS, Custom Kernel Compilation with ABS, Kernel Patches and Patchsets), but they don't answer all of my doubts.
    The major question is related to my graphic card's drivers. I'm a happy Radeon user using fglrx proprietary drivers. At the moment they are working fine on a vanilla kernel form [core], the problem is whether I would have to do some voodoo to make them work on a rt-kernel? Now I know what is written in wiki about installing Catalyst drivers on a custom kernel, but when on Mandriva I tried to install 8.1 on my rt-kernel, I had to do some tricks and recompile fglrx to make it work. Does anyone tried installing Catalyst drivers ver. 8.2 on a real-time kernel from AUR?
    Another thing: I have a .config file from the previous rt-kernel. Would it be suitable for 2.6.24?
    Finally, I recently read about grsecurity patchset. Did anyone tried it on Arch, especially on a real time kernel? Any problems?
    Waiting for suggestions

    broch wrote:first I hope that you understand that RT kernels on desktops are slower than preempt default or vanilla kernel?
    I'm using one on my Mandriva 2008.0 and didn't notice any slowdown.
    broch wrote:second: I use grsec (or RSBAC) kernels.
    grsec will not work with anything messing up with memory (even Kolivas patches in past had issues with grsec). This can be fixed but then what is the point of enabling hardened kernel with disabled features?
    I simply patch vanilla with grsec.
    Remember that some pax options are incompatible with X (all explained when option is selected, so no way to make mistake)
    finally it works well lowest overhead, best speed and easies to manage among kernel hardening patches (I do not count Apparmor, as this is rather limited tool)
    If I understood you, then it's a choice between real time and more security, right?

  • How to verify RTSJ use linux real time kernel?

    Hi,
    I'm complete newbie into this area and I'm trying out the RTSJ 2.1 beta Linux. I'm using this on Ubuntu with the linux real time kernel. Is there anyway to find out whether the real time kernel is being actually used or in other words is there a way to find out whether RTSJ works fine with the real time kernel on Ubuntu? I see that the programs get compiled and run irrespective of whether I use the real time kernel or the generic kernel.
    Thanks,
    Vidura

    Hi,
    I would assume, like other distributions, that you either boot the real-time kernel or you don't. uname should show you what you are running, but you'd have to ask the Ubuntu folk what you should see for the RT kernel.
    To see if you are benefiting from real-time, you need to run a RTSJ app that tracks deadline misses or measures latency/jitter. Try it on the non-real-time kernel and the real-time one and see what you get. Some of the examples in the "Getting Started" guide should be usable for these purposes.
    David Holmes

  • Real Time Kernel patch

    Hi,
    Has anyone tried to add the realtime kernel patch to an existing arch installation?
    Can anyone provide home help ?
    I want to add the RT patch so i can use some Real Time Java implementations on arch

    As you can see, a bit of googling would have solved your problems. Now, please go read the wiki on custom kernels and the AUR before asking questions about how to use those.

  • Real time OS?

    Is the kernel of solaris 10 a real time kernel? I mean on solaris 10 can I code and run application developed in real time java?

    Should work, at least if you have two CPU's, then you can use one of the CPU's to recieve hardware interrupts, sync filesystems etc and the other one can be used to run your rt application.
    //M:

  • Qual a diferença do LabVIEW FPGA e o LabVIEW REAL- TIME?

    Hello,
    Could anyone help me? This question arose in my work and could not answer. Does anyone know tell me?
    Thank you.
    Solved!
    Go to Solution.

    Olá, 
    Com o LabVIEW FPGA você programa diretamente o chip FPGA presente no chassis cRIO, placas da NI Série R e single Board RIO. Você programa as E/S diretamente no chip, sendo assim uma programação de mais baixo nível. A grande vantagem do FPGA é o "paralelismo real", o que garante altas velocidades na execução das rotinas programadas.
    Assista ao webcast Introduction to LabVIEW FPGA
    Com o LabVIEW Real-Time você desenvolve aplicações que são críticas em relação a "tempo". Chamamos de aplicações "deterministicas". A idéia é que, se você tem uma rotina que deve ser executada em um tempo determinado, a diferença entre o tempo real e o que você programou seja o menor possível. Aplicações em Computadores comuns não são deterministicas, pois enquanto o LabVIEW executa uma certa rotina programada, o Windows está executando outras tarefas, monitorando a utilização de periféricos, atualizando a tela, etc.
    Real time não significa "Velocidade", mas "Confiabilidade".
    Assista ao webcast LabVIEW Real-Time: Graphical Development, Hard Real-Time Performance
    Hello, 
    With LabVIEW FPGA you program the FPGA chip itself. The FPGA chip is found into cRIO chassis, NI R-Series Boards, and NI Single board RIO. You program the I/O directly in the chip, so we consider this as a low level programing. The main FPGA advantage is the "Real Paralelism", which guarantees high speed execution programming.
    Whatch Introduction to LabVIEW FPGA webcast
    With LabVIEW Real-Time you develop called "time crictical" or "Deterministics" applications. In case of you routine must be executed in a specified period of time, the difference between the real time execution and the time you programmed is as low as possible. Commom computers programming are not deterministic, because in the meantime of executing a certain programmed routine, the OS (e.g. Windows) is running other appication tasks, monitoring peripherals like mouse and keyboard, uptading screen, etc.
    Real-Time doesn't mean "faster" but "reliable".
    Watch LabVIEW Real-Time: Graphical Development, Hard Real-Time Performance webcast
    I hope the information helps you!
    Best Regards
    Felipe Flores
    Engenharia de Aplicações
    National Instruments Brasil

  • What is the best way to store data on a network hard drive using CompactRIO RTOS and Labvew Real time?

    HI!
    I'm starting a project in which I have a low rate stream of data to read in a real time environment. I should store these data on a network hard disk without any PC with standard OS, I just have CompactRIO RTOS. How can I send this data to the network drive? Is it possible to just “write” data like I do for a standard file in LabView?
    Thanks for any help!!
    Il Conte
    dr. Valentino Tontodonato

    Il Conte,
    you have to keep in mind that normally the RT OS does not map drives other than the Compact Flash that it has onboard (C:\). There are exceptions such as
    -cFP-20xx which may have additional Flash Drives which can be addressed as D:\ Drive
    -CVS systems with IEEE-1394 interface can write/read to Firewire external Harddrives
    -PXI Controllers booted from a Floppy disk may map the floppy drive as A:\
    One solution to your needings may be to write data to files locally on your onboard CompactFlash and then transfer these files to a network location using FTP, provided the network drive you are pointing to supports FTP.
    Let us know if you need any more help with this,
    AlessioD
    National Instruments

  • How can I save/write data on the hard disc of the Real-Time System?

    I would like to acquire huge size of data via LabView Real-Time System.
    Since data is so huge, I am now thinking that it might be good idea to
    write/save data on the hard disc of the Real-Time System first and then
    transfer the data file to a data processing PC using FTP etc.
    If you know how to save/write data on the hard disc of the Real-Time System
    (Ver. 7.1), please let me know.
    Thanks,

    Just to add to Aitortxo's good answer,
    Since you have only one Drive ( C:\) on your RT, just keep monitering the availible disc space.
    After every few set of file writes keep transferring Backups delete these files, so that you  keep C:\ drive space for running your applications.
    Regards

  • Booting Into Real-Time From Hard Drive

    Hello,
         We have a system that is real-time compliant, as said so by the pceval software that NI has on their website, that will not boot into real-time OS from the hard drive.  It can boot into RTOS with the floppy boot disk, but for some reason it can not do it from the hard drive alone.  We made a format hard drive disk and run it and it says that it succussfully installs the files and tell us to reboot.  When we do so the system has a short blinking line and just sits there, almost like the system is being haulted.  We have formatted the hard drive many times using the format hard drive disk and we have even tried other floppies thinking that the disk was bad.  We don't understand why it could boot into the RTOS from the floppy but not from the hard drive itself.  The only thing I can think of is that the disk isn't writing the right MBR to the hard drive and it's not getting directions to boot.  I have been working on this for quite some time, so any help would be greatly appreciated.  Thank you.
    Michael 

    We have actually figured it out, after many long days.  You just install the RTOS like Labview says and make sure it is the first partition.  Whether that is on another hard drive that is the master or if it is actually the first partition of the drive.  We had two seperate drives and we were running Windows as the Master and the Labview RTOS as the slave.  When we switched them it worked.  Also, doing a long format (Not Quick Format) also fixed the situation.  For a bootloader we are using GAG, THE GRAPHICAL BOOT MANAGER which can be found for free on google.  Thank you for your help.
    Michael

  • Real-Time Scheduling

    I've heard of some stuff going on in the kernel development, referred to as "real-time scheduling."  Could someone tell me what it is, and what it's benefits are?  I've been having a hard time finding information on it.

    brebs wrote:
    See wiki.
    That took me about 0.05 seconds of googling
    Note to self: drink coffee prior to doing anything on the computer.  Or caffeinated cereal.

  • I have problem with playback in real time

    playback in real time is  slowly, i have BlackMagic duo decklnik card
    what is the problem should i have to change the settings on the project?
    My english isn't good, hope you will understand me.
    Thank You.

    >Is mov file 1920 x 1080
    That doesn't really say much - what is the FORMAT of the media?  Look at the Item Properties.  Posting a screen shot of the Item Properties would help.  Do the same with the Sequence Settings.
    >how can i change FCP's RT settings to Dynamic.
    Use the drop-down RT menu near the upper left-hand corner of the Timeline.
    Also please answer the other questions:
    Where is the media stored?
    How is that hard drive connected to your Mac?
    How much available free space on each hard drive (percentage)?  Please list free space individually for each hard drive.
    -DH

  • CRIO and ni 9234 modules not working or communicating through fpga with accelerometers, fpga connected to real time application which is also connected to shared variables linked to modbus slave

    Hi,
    I have a compact rio which has a 4 way chassis attached to that chassis is three ni9234 modules they are linked using fpga to a real time application then using shared variables in the low speed loop that are linked to a modbus slave to communicate with dcs, the ni 9234's have accelerometers connected to them with iepe ac coupled option on the c modules, my problem is the real time application seems to be running okay even when power loss occurs it restarts with no problem and the fpga writes to the portable hard drive bin files fine but without a accelerometer connected I get low noise readings as soon as I connect a accelerometer to any one of the 10 outputs it just goes to a fixed number (0.03125) as soon as disconnect it again it reverts back to reading noise, I have run a scan on the modules and only get a spike when I connect or disconnect the accelerometer, I have tested the voltage at the pins of the module and I get 22 volts dc which makes it more likely that the hardware is not the problem but a software is maybe causing this to hang-up, I attach project and files for your perusal. I also carried out a new project which in scan mode directly linked the module input to shared variable and the same scenerio again. Help would be much appretiated. 
    Many thanks
    Jason
    Solved!
    Go to Solution.
    Attachments:
    logger 2plusmodbus2.zip ‏679 KB

    Whren using waveform acquisition with the 9234s we recommend the following FPGA and RT template.
    http://sine.ni.com/nips/cds/view/p/lang/en/nid/209114
    it can be extended as a data logger with:
    http://zone.ni.com/devzone/cda/epd/p/id/6388
    or using shared variables combined with scan engine
    http://zone.ni.com/devzone/cda/tut/p/id/9851
    The FPGA in all of these, as well as the RT framework have been used successfully by 1000s of users.  I would recommend giving these a try. 
    Preston Johnson
    Principal Sales Engineer
    Condition Monitoring Systems
    Vibration Analyst III - www.vibinst.org, www.mobiusinstitute.com
    National Instruments
    [email protected]
    www.ni.com/mcm
    www.ni.com/soundandvibration
    www.ni.com/biganalogdata
    512-683-5444

  • I am looking for a real time CRM consultant who can teach me in Bangalore ?

    I am looking for a real time CRM consultant who can teach me in Bangalore ?
    Call me on 7204246238

    If you are looking for a Creative player only The Zen V and Zen V plus are good options. I think they will satisfy most of your requirements.
    Strike that, I don't think this will act as an "external hard dri've" as described in bMessage Edited by fdreinthea on 2-2-200605:37 AM

  • How can I boot my PXI controller into real-time without a floppy disk?

    My PXI controller is in a lab which has intense magnetic fields that could corrupt the floppy disk used to boot the PXI controller into the LabVIEW Real-Time (RT) Operating System. How can I boot the PXI controller into real-time directly from the hard drive?

    If you are using LabVIEW 5.1.2 Real-Time (RT), launch Remote System Explorer and select Disks >> Create Format Hard Drive Disk. If you have LabVIEW 6 RT, launch the Measurement and Automation Explorer (MAX) and select Tools >> RT PXI Disk Utilities >> Create Format Hard Drive Disk (LabVIEW RT 6 has not be released yet). Once you have created the disk, boot the PXI controller with the Format Hard Drive Disk, and this will format the PXI's hard drive and install the real-time OS boot loader. Now you can reboot the PXI without a floppy disk and configure the PXI using Remote System Explorer or MAX. Be aware that this will remove all information from the hard drive, including other operating systems.

  • Real-time HDV importing ..& Happy New Year!

    Hi! Happy 2006!
    Some time in December (?) I said I'd been to the London Apple Store to try importing HDV - with a Sony FX-1 camcorder - into iMovie HD on a PowerMac, to see if it'd import in "real time" ..instead of importing at half or quarter speed, on my PowerBook and Mac mini, while it converts hi-definition footage into Apple's 'Intermediate Codec' (to make HDV MPEG footage editable).
    It couldn't be done in the hour and a half I was there, so an Apple Genius was going to get back to me.
    After a bit of complaining and cajoling, a Genius at 'The Studio' in the Store finally got back to me on Jan 3rd. [I'm now back home, so this is my first visit to Discussions for a while!]
    As I promised that I'd report back, here's what he said:
    "Today I imported HDV 1080i footage into iMovie using the Sony HDR-FX1 Camcorder using a Dual 2.7 G5 Power Mac with 4.5 Gb of Ram and there didn't appear to be any lag, it was realtime. I would recommend having as much memory as possible and having less than 4.5 might mean there is a transcoding lag as iMovie converts the HDC encoded footage using the Apple Intermediate Codec. I do not have any details what the minimum speed processor and memory requirements are to achieve realtime import, however it is hardware dependent.
    As another alternative you may consider using Final Cut Pro 5 software. This software uses the HDV Codec Natively and there is therefore no transcoding required. Capture is in realtime, whatever machine you use, so long as it is within the minimum requirements for Final Cut Pro 5. (Please check http://www.apple.com/finalcutstudio/finalcutpro/specs.html for further detail) For details of using HDV with Final Cut Pro 5 please go to http://www.apple.com/finalcutstudio/finalcutpro/editanything.html
    I hope this goes someway to answering your queries."
    (..So maybe I'll get a post-Christmas present of a quad ..Daniel's should have arrived by now ..wonder if his feet have touched the ground since..)
    So we who patiently wait while iMovie HD imports hi-def HDV at half-speed or slower could achieve 'real-time' importing with a PowerMac and lots of RAM, it seems.
    I also tried an HC-1 (..the compact 1-chip HDV camcorder..) and have to report that the auto-focus isn't anywhere near so fast as the pretty-near-instant focusing of the FX-1, and - predictably - its low-light performance isn't anywhere near the bright, un-grainy, colourful images of the FX-1. But the HC-1 does have NightShot and Super NightShot for shooting (monochrome) in absolute darkness, helped by infra-red LEDS on the camera, which the big, bulky FX-1 doesn't do. The HC-1 has just about all of the other gizmos of the FX-1 (..user-definable preset transitions - to zoom, change focus, adjust white balance, etc, automatically during shots..) but they're accessible mainly through touch-screen menus, instead of via quick push dedicated switches.
    So Happy New Year; hope it's a good one - and a faster Mac DOES mean real-time importing of HDV footage!
    [..I notice that Focus FireStore on-camera hard drives - which mean "say goodbye to importing, because your footage is saved to disc while you shoot" - have an HDV-compatible model ..but I think it still takes time to convert the captured HDV MPEG footage on the drive into Apple's Intermediate Codec for editing within iMovie HD. I'll investigate further..]
    Hope you had a good Christmas/Hanukah/whatever!

    HAPPY NEW YEAR!
    Kalman Toth Database & OLAP Architect
    SQL Server 2014 Database Design
    New Book / Kindle: Beginner Database Design & SQL Programming Using Microsoft SQL Server 2014

Maybe you are looking for