We have a 32 bit application. It is currently running on a 32 VM. If we run the application on a 64 bit OS(Virtual Machine) which supports Intel Virtualization Technology will it run faster? We do not have a 32 bit OS(Virtual Machine) which supports Intel Virtualization Technology.
There is not not enough material that I could find. Please share your knowledge.
The answer is no.
We were running on an instance which had no Hardware virtualization support. Now we tested on a new virtualized system with Intel Virtualization Technology. The Application here is a 32 bit system and the new system was 64 bit OS - Ubuntu. This was run using gcc-multilib support for Ubuntu. There was not a huge performance improvement observed.
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I have a 32 bit Windows Operating System. But my system supports 64 bit architecture,i could say that because when i downloaded and ran VMWare Processor Check for 64 bit compatibility tool from the VMware website it shows 'This host is capable of running a 64-bit guest Operating System under this VMWare product'. So with this 64 bit architecture would i be able to install and use Cloudera VM and then hadoop?
Based on the comments, you can go ahead and use 64 bit without any issues and hadoop will be up and running. However, you can always go back and download 32 bit and import in your VMWare and have both 64 bit and 32 bit imported. If in case you get in to any issues with 64 bit, then you can stop using it and run 32 bit.
If cloudera is not supporting 32 bit, then check with hortonworks VM.
Hope this helps!
Just a simple question: Is there any way to run a program compiled under a 64 bit Windows environment (with mingw64) on a 32 bit machine? Any DLL or any compatibility layer which I can use?
If you are talking about a 32-bit processor, then no. But if you are running a 32-bit OS on 64-bit hardware, then you can do it with VMWare. A 64-bit guest can run on a 32-bit host, if the hardware supports it.
Bochs should do the trick, but you'd need another copy of Windows to run in the virtual machine. (Some editions of Windows include additional licenses for virtual machines, so you might be in luck.)
Performance would probably be very poor.
No you cannot do this. The other direction is possible through an emulator, e.g. on Windows it is called WOW64.
It is standard practise on platforms that still have large install base of the 32-bit versions of the OS to ship either just a 32-bit version, or both 32- and 64-bit versions.
I can recommend VirtualBox for this purpose, you can download the free version and it's easier to use than VMWare. However you will need a 64bit installation CDROM, and storage space for a full system install, and if you are installing Microsoft Windows they will expect you to pay for a license key.
Also your CPU needs to support both 64 bit mode in the hardware, and the vt-X/AMD-V features (most of them do). It's a bit slower, although mostly that seems to be the display that slows it down, not the internal program calculations. This is NOT an emulation, the CPU is really running native 64 bit, but VirtualBox fakes the hardware devices (display, disk, network, etc) so the result is not as nice as running normally. 3D graphics acceleration is available, but it has limitations.
An easier option is simply to hire an online Virtual Machine by searching for someone offering 64 bit versions of Windows Server (there are plenty). Usually they will offer connection over Remote Desktop, typically you can pay by the month. Upload your programs, run what you want, then delete it when you are finished and cancel the service. The service provider handles installation, licensing, hardware, etc.
hey that was a problem that gave me a headache for a while but i solved it. I had windows 10 32 bit but when i opened system in control panel it said that "32 bit architecture, 64 bit processor." lookup some websites and your hardware must have a few things which you can check in CPU-Z( lookup some webpages for this) its necessary. Then export your folders,documents, softwares in an external hard drive..now download the windows 10 64 bit iso file and boot it.ands viola! you got 64 bit architecture ( i also recommend upgrading ram atleast minimum 4 gb) or the other way is to install 64 bit guest in VMware ir another virtual machine software...gud luck
No, It is not possible...........
We have an application written in C/C++ code running on 32-bits windows with 32-bit Hardware. My question is that if we upgrade our hardware to 64-bit and keep our OS 32-bit, does my application need a port to 64-bit? If it requires, what benefits will be there on a 32 bit OS?
Hardware doesn't count -- the OS does. Ergo:
32 bit hardware with 32 bit OS will run only 32 bit ports
64 bit hardware with 32 bit OS will run only 32 bit ports
64 bit hardware with 64 bit OS will run both 32 bit and 64 bit ports
The advantage of recompiling for 64 bit is access to more than 3GB ram and a speed increase if you operate on 64 bit datatypes or take advantage of compiler intristics (and a few others, but do not count on a immedate gain).
If you keep the OS 32-bit, you must keep the app 32-bit, for many common values of OS. We, of course, cannot use telepathy to tell which OS you are using.
if a 32-bit OS running on dual core 64-bit CPU, are both core performance's are lower?
what is exactly happening inside CPU?
Are the 2 cores still working together, and slower than if equipped with 64-bit OS?
I am using a Win 7 32-bit Professional on Intel P6200.
Thanks
The major advantage of 64-bit CPUs is their ability to address more memory. It generally won't affect speed. An exception might be where a given program can run faster with more RAM, and you actually have that much RAM (more than 4GB on Windows). (And, of course, the program must be a 64 bit application.)
The processors are working together in exactly the same way. They just have smaller address spaces with the 32 bit OS.
From user perspective a 64-bit operating system mostly just allows you to run 64-bit applications. And why would you do that?
If your application has a dedicated 64-bit version, and it is heavy on numerical calculations, which were optimized to use capabilities of x64 platform (mostly more general-purpose registers), or needs a lot of RAM (more than 2GB) at once, then there are chances it will work faster.
Otherwise, most probably it will work at the same speed as 32-bit version.
It makes very little difference but my experience is that a 64 bit OS runs some 32 bit apps very slightly better than a 32 bit OS. But it's marginal at best.
I was reading about WOW 64 here
http://en.wikipedia.org/wiki/WOW64
and learnt that its a layer in 64 bit Windows OS to run 32 bit programs.
So can I assume that 32 bit programs run relatively slower on 64 bit OS against when they are natively run in 32 bit OS.
I can see the advantages of memory access of over 4 GB in 64 bit OS. But does this advantage necessarily offset the small overhead added by layer of WOW64 ? Are there any other advantages of 64 bit which offset this.
The main advantage of a 64-bit system is that it allows applications in 64-bit mode, which, in turn, is primarily useful if you need to access more than 4GB memory. If you have that requirement, using a 64-bit system is your only choice. Your application would be using 64-bit code, so WOW64 would not be used, and thus not cause problems.
If you don't really have the requirement to use more than 4GB of memory in a single process, it becomes debatable whether 64-bit Windows is really an improvement. You might need 64-bit Windows if you want to use more than 4GB of main memory at all (although you can also use PAE for that, which has its own disadvantages). Still, on a 64-bit system, you can run 64-bit applications. With AMD64 processors, 64-bit mode might be faster than native 32-bit mode, because the processor has more registers. Whether this slight gain outweighs the slight loss wrt. WOW64 depends on your application mix.
Personally, I think many people install 64-bit Windows because they don't fully understand the consequences of doing so, but feel they are on the safe side (which they may not, due to the lack of drivers).