The amd64 architecture (which works even on Intel 64-bit CPUs) can address more memory and may have other performance advantages, but requires a compatible CPU.MacOS X OpenGL (PowerPC) (Apple MacOS-X 10.4.7 or later) SOLARISX8664 OpenGL (Sun Solaris 10 (64-bit x86) with OpenGL) Windows OpenGL, CUDA (Windows XP/Vista.Step 3. If Windows lists 'X64 Edition,' it is a 64-bit version of Windows, if it does not list an edition, it is a X86 32-bit edition. To double-check the information in Windows Vista and Windows 7, Computer Management can also be used to find the bit-edition. Click 'Start,' type in 'Computer Management' and click. That difference in hardware is why ARM processors use less power than x86/x64 processors at the same clock speed.
Do I X86 Or X64 Software To The
7 DVD/USB ISO Download Tool to create a bootable Windows 7 USB flash drive or DVD.The USB memstick image is meant to be written to disc before use and includes an installer that installs pfSense software to the hard drive on your system. This is the preferred means of running pfSense software. The entire hard drive will be overwritten, dual booting with another OS is not supported.The DVD Image (ISO) Installer is used to create a DVD version used to install on virtual machines or systems with a DVD drive.
Moving right along.WARNING: This is obscure and you probably don't care. Write managed code, compile, and it'll work everywhere."If you have 100% type safe managed code then you really can just copy it to the 64-bit platform and run it successfully under the 64-bit CLR."If you do that, you're golden. I'm running Vista 64 on my quad-proc machine with 8 gigs of RAM, and Windows 7 Beta 64-bit on my laptop with 4 gigs.Writing managed code is a pretty good way to not have to worry about any x86 (32-bit) vs. I'm running 64-bit operating systems on every machine I have that is capable.
When I'm developing I usually don't sweat any of this. I run VS2008 all day on x64 machines writing ASP.NET apps, WPF apps, and Console apps and don't give it a thought. I also have buttloads of RAM which is nice.The first question developer ask me when I'm pushing 64-bit is "Can I still run Visual Studio the same? Can I make apps that run everywhere?" Yes, totally.
The short story is - Intel lost. This is important to note: It doesn't matter if you have an AMD or an Intel processor, if you're 64-bit you are using the AMD64 instruction set. It's a 64-bit process and it can access a ridiculous amount of memory (if you've got it.like 16TB, although I suspect the GC would be freaking out at that point.)That 64-bit process is also having its code JIT compiled to use not the x86 instruction set we're used to, but the AMD64 instruction set. However, my ConsoleApplication1.exe doesn't have that. Some of the things that are 64-bit specific are:For example, I have a C:\Windows\Microsoft.NET\Framework and a C:\Windows\Microsoft.NET\Framework64 folder.If I File|New Project and make a console app, and run it, this is what I'll see in the Task Manager:Notice that a bunch of processes have *32 by their names, including devenv.exe? Those are all 32-bit processes. NET on a 64-bit machine the package is bigger because you're getting BOTH 32-bit and 64-bit versions of stuff.
64-bit - Why Should I Care?Everyone once in a while you'll need to call from managed code into unmanaged and you'll need to give some thought to 64-bit vs. But, to repeat (I'll do it a few times, so forgive me) the most important take away, from MSDN:Let me switch it to x86 and look at Task Manager and we see my app is now 32-bit.Cool, so. It's the JIT that makes the decision at the last minute.In my case, I am running 64-bit and it was set to Any CPU so it was 64-bit at runtime.
Do I X86 Or X64 64 Bits All Other
In the LLP64 data model, only pointers expand to 64 bits all other basic data types (integer and long) remain 32 bits in length.The. These considerations led the Windows team to select an abstract data model called LLP64 (or P64). However, applications do need pointers to 64-bit data, and they need the ability to have 64-bit data types in selected cases. Making all data types 64 bits in length would waste space, because most applications do not need the increased size.
As said in the P/Invoke Wiki:The use of int will appear to be fine if you only run the code on a 32-bit machine, but will likely cause your application/component to crash as soon as it gets on a 64-bit machine.In our case, it doesn't crash, but it sure is wrong. Here's what's printed under x86 (by changing the project properties):The bug is subtle because it works under x86. Consider the following code snippet: Console.WriteLine( "SizeOf IntPtr is: ", sysinfo.lpMaximumApplicationAddress.ToString()) See the mistake? It's not totally obvious. NET there is an integral data type, not widely known, that is specifically designated to hold 'pointer' information: IntPtr whose size is dependent on the platform (e.g., 32-bit or 64-bit) it is running on.
Gotchas: Other AssembliesYou'll also want to think about the assemblies that your application loads. Remember that IntPtr is platform/processor specific.You can still use P/Invokes like this and call into unmanaged code if you're on 64-bit or if you're trying to work on both platforms, you just need to be thoughtful about it. When I change it from int to IntPtr:LpMaximumApplicationAddress =8796092956671That's better. Remember that IntPtr is smart enough to get bigger and point to the right stuff. I've used an int as a pointer to lpMaximumApplicationAddress rather than an IntPtr.
Using marshaling as a mechanism for sharing information You'll get a BadImageFormatException as I did in this post.The MSDN article gets it right when it says.it is unrealistic to assume that one can just run 32-bit code in a 64-bit environment and have it run without looking at what you are migrating.As mentioned earlier, if you have 100% type safe managed code then you really can just copy it to the 64-bit platform and run it successfully under the 64-bit CLR.But more than likely the managed application will be involved with any or all of the following: That'll work fine on x86, but break on x64 when your AnyCPU compiled EXE runs as x64 and tries to load an x86 assembly.
The same rules apply if you're making a WPF app, a Console App or an ASP.NET app. Keep in mind that downstream dependencies have a direct impact on the overall application.I have found that for smaller apps that don't need the benefits of x64 but need to call into some unmanaged COM components that marking the assemblies as x86 is a reasonable mitigation strategy. Make changes to your logic to handle marshaling and/or serialization.There may be cases where you make the decision either not to migrate the managed code to 64-bit, in which case you have the option to mark your assemblies so that the Windows loader can do the right thing at start up. Work with other vendors, etc., to provide 64-bit versions of their products. Make changes to your code to handle 64-bit pointers correctly. Once you do this homework you will have to look at your choices to do any or all of the following:
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