Why is Google chrome/Ms Excel a multi programming operating system?
On what basis can we say Google chrome/Ms Excel is a multi programming operating system?
Google Chrome/MS Excel is not an operating system and is in a computer program.
A multiprogramming operating system can run multiple programs concurrently on the same processor.
for eg: Windows can run multiple apps at the same time like chrome, excel etc. Hence Windows is an multiprogramming OS.
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I use raspbian for embedded systems like microcontrollers, I make several sensors and display them on an LCD, does the Rasbian operating system also have a real time operating system?
Raspbian is a distribution for Raspberry Pi built on top of Debian Linux, which is a general purpose operating system, as opposed to a real-time operating system. There are ways to run a RTOS on RPi, but it is rather waste of a powerful board like RPi. A more suitable way to achieve real-time behaviour would be to use the PREEMPT_RT patch for the Linux kernel.
I am New to VxWorks. First of all Can I use VxWorks OS as Normal OS on my PC? I mean Can I run my application software on VxWorks OS?
While VxWorks can run on PC hardware, it is not a general-purpose OS for running independent executables. VxWorks is an RTOS library; you statically link it to your application and the whole runs as a monolithic executable.
It does support a command line interface (intended primarily for development and debug), and from that it is possible to dynamically load and link object files, but these are not independent executables in the sense they are in a GPOS; they essentially become part of the monolithic application.
An RTOS such as OS/9 or QNX would be more suited as these can operate more like a GPOS in the sense of loading and executing independently linked executables.
In any event, application software must be specifically built for these targets.
For versions of VxWorks prior to VxWorks 6, the answer by clifford provides a good explanation of why this is not really possible.
VxWorks 6 introduced Real Time Processes (RTPs). These are independant, user mode applications, running on top of the VxWorks OS. Dependant on how the VxWorks OS has been configured and built, these RTP applications may have access to POSIX libraries, and so you may be able to run POSIX applications (eg linux programs) with little modification.
However, these must still be built for VxWorks, ideally linked against your own VxWorks Source Build.
You cannot, however, just pick up any old application and expect it to run. You are never going to get Word or Excel to run.
I'm using a program that is calculating things as it receives information and I need it to be running on multiple virtual machines on my PC at the same time.
Now before I was going to set this up, I was wondering which operating system would be ideal to be running on the virtual machines to run as many of them as possible on restricted ressources? The only requirement is that my program is not able to run on Linux.
I was thinking of going back to Windows XP on each virtual machine, assuming the newer operating systems are taking too much ressources for themselves, but that's just a guess.
Hope someone has more knowledge than me about this and can help me out.
Thank you!
If you are NEVER going to take these VMs online XP is a better choice. Windows 8.1 (as well as 10) is a recent design and hence is designed for high powered modern hardware, XP was designed long ago for old slower hardware. Running an older OS on newer hardware will allow it to compartively quick, certainly much faster than a new OS on old hardware. Another matter is what programs you will run, if it is old programs they will be compatible with XP, if it is new ones there is a chance XP will not be able to run them. If you are going to take these VMs online then XP is a bad idea, wonderful an operating system as it was it is now becoming insecure due microsoft stopping producing updates to patch holes in it, And do not forget also that Microsoft wouldn't support XP anymore (http://windows.microsoft.com/en-us/windows/end-support-help), so you should go back to the drawing table and fix your priorities and needs and then decide , cheers !
If you cannot run *NIX / BSD Systems you can use WFL windows xp for legacy computers it works on 128 mb RAM
Update: i386 old systems.
If I install a bare-metal hypervisor (say, ESXi), would it allow me to run Windows 7 concurrently with Linux?
Would it allow me to run multiple instances of Windows 7?
When I'm sitting at the PC that's running Win7 and Linux on a hypervisor, which OS do I see when I look at the screen? (I'm suspecting that the only way to access either OS is to do a remote login.)
Assuming the answer to #2 is yes, how do you manage multiple installs of Win7 on the same hard drive?
Thanks in advance!
If you simply want to run Linux and Windows in parallel you may of course do this on e.g. ESXi. Still, the OSes would run with virtualized (or emulated) hardware available to them, i.e. you would not be able to easily access all the hardware directly and the hypervisor itself not only introduces an overhead but this overhead is not deterministic.
If you want to run an RTOS (like Real-Time Linux) or any other RTOS, then you need a "real-time hypervisor".
You can google for such hypervisors - there are a few out there.
(I dont want to recommend one here as we are a vendor of such a solution our selves)
Regards
GFL
I'm reading an article about Xen, a virtual machine monitor. They say that an operating system requires some modification in order to be able to act as a guest OS on top of Xen. Now, for an OS like Linux, I can understand what a "modification" might mean but in the case of an OS like say, Windows XP, what does it mean? I mean, XP is closed source proprietary OS right?
It means exactly the same thing. It's just harder because the source is not widely available. Note that the modifications are no longer required when Xen is used in conjunction with hardware virtualization.
Xen was originally a university project. As a researcher (or as a government agency tasked with infrastructure security), you can get the Windows sourcecode from Microsoft. You're just not allowed to distribute your own version of Windows.
This is exactly what they did: they had the sourcecode of Windows XP and then they ported XP to Xen, just to show that if Microsoft were ever to officially support Xen, it would be doable.
On the other hand, although para-virtualization cannot provide an end-to-end virtualization solution, it can improve performance.