Questions tagged [64-bit]

In computer architecture, 64-bit integers, memory addresses, or other data units are those that are at most 64 bits (8 octets) wide. Also, 64-bit CPU and ALU architectures are those that are based on registers, address buses, or data buses of that size. 64-bit is also a term given to a generation of computers in which 64-bit processors are the norm.

In computer architecture, 64-bit integers, memory addresses, or other data units are those that are at most 64 bits (8 octets) wide. Also, 64-bit CPU and ALU architectures are those that are based on registers, address buses, or data buses of that size. 64-bit is also a term given to a generation of computers in which 64-bit processors are the norm.

64-bit is a word size that defines certain classes of computer architecture, buses, memory and CPUs, and by extension the software that runs on them. 64-bit CPUs have existed in supercomputers since the 1970s (Cray-1, 1975) and in RISC-based workstations and servers since the early 1990s. In 2003 they were introduced to the (previously 32-bit) mainstream personal computer arena in the form of the x86-64 and 64-bit PowerPC processor architectures.

A 64-bit register can store 264 = 18446744073709551616 different values, a number in excess of 18 quintillion. Hence, a processor with 64-bit memory addresses can directly access 264 bytes of byte-addressable memory.

Without further qualification, a 64-bit computer architecture generally has integer and addressing registers that are 64 bits wide, allowing direct support for 64-bit data types and addresses. However, a CPU might have external data buses or address buses with different sizes from the registers, even larger (the 32-bit Pentium had a 64-bit data bus, for instance). The term may also refer to the size of low-level data types, such as 64-bit floating-point numbers.

Source: wikipedia

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Compiling 32-bit binaries on 64-bit RHEL

I have a 64-bit RHEL 5.3 server. There's a piece of server software that's more memory efficient if I compile it as 32-bit. Is there a way to tell GCC to target 32-bit? I just want a specific piece of software to be 32-bit, everything else should…
Hongli Lai
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DHCP client not getting IPv4 address from a DHCP server

I configured a DHCP server on a VM in VirtualBox. This machine has 2 network adapters, enp0s3 - NAT (from where I have my network connection) and enp0s8 - Internal Network (intnet). DHCP server is listening on enp0s8 interface. Configurations: …
Alex V
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Memory problems with Tomcat on Solaris 10

I have a server running Solaris 10. It reports 70+ GiB free RAM. I am attempting to start Tomcat 7.0.68 using Java 1.7.0_80 in 64-bit mode. The server is claiming that it is not able to allocate 717 MiB of RAM. I get an hs_err_pidxxx.log file…
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Why Does WMI (Capturing) Boot Image Require "wpeutil initializenetwork" To Be Ran?

I don't get why I have to take the extra steps to run "wpeutil initializenetwork" before my NIC card is turned on and working within the WMI Capture (WinPE) GUI. I have the drivers added to the image and I still have to press Shift+F10, then type…
Arvo Bowen
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How to report less memory to 32 bit program so it will work on 64 bit Vista?

I have a legacy setup program that will not install on a 64 bit version of Vista with 4GB of RAM. The setup program performs a check at the beginning of the installation to see if there is enough memory. It determines there is "less than 256K of…
Matt Spradley
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Vmware/Linux 64 vs 32 bit

I have some old supermicro servers with over 16GB of ram in them which are still running 32bit version of linux with 2.6.x kernels and vmware on top of it. I wonder if there is any advantage of upgrading the distro/kernel to a 64-bit Debian. The…
DragonAge
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Debian: how to install a 64 bit package using apt?

I am migrating my system to 64 bit and the debian wiki suggests to first debootstrap a 64bit into a directory, then collect all 64bit packages and install them but this doesn't work. To install 64bit of a package they suggest to use…
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Jenkins won't start

I'm using: Jenkins 1.541. Java JDK 7u45 (tried 64 and 32 bit versions). XAMPP 1.8.2 I have downloaded the default MSI installation from http://mirrors.jenkins-ci.org/windows/latest, and I have installed it. Jenkins tries to run the first time,…
Veehmot
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Why am I missing 4GB of RAM on Windows Server 2008 R2 64bit?

I noticed today that a server was very low on memory. It physically has 8GB installed and runs Windows 2008 R2 Standard 64bit. It also hosts 2 virtual machines using HyperV. Server is Dell Poweredge R510. However the host OS reports in task…
NickG
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What is the best way to "upgrade" Server 2008 x86 to x64?

I know that you cannot do an upgrade from x86 to x64. What I need/want to do is re-install Server 2008 on a machine to "upgrade" to the 64-bit version. My question is, how do I handle this in the best possible way as not to disrupt the services…
Paxxi
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Can I export mailbox contents from an Exchange 2007 server if I install Outlook 2010 x64 on the same server?

As per this article, in order to export mailbox contents from Exchange 2007, you need to use a 32-bit computer with the following software installed: Exchange 2007 management tools Outlook 2003 or Outlook 2007 The 32-bit requirement comes from…
Massimo
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Virtualizing Windows 7 x64 on Windows 7

Is Virtual PC on Windows 7 x64 only able to virtualize x86 versions of Windows 7?
Svish
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Reclaiming an old server

I got a server, four-2.6Ghz AMD opteron and 10Gigs RAM on TYAN Thunder board, for free. The thing is massive and loud, I'd like to reclaim the processors and RAM into two smaller computers each with two processors. Can someone suggest a motherboard…
nlucaroni
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Trying to differentiate between two identical NIC's on midly diff Linux laptops

The helpful commands for dissecting loaded devices /NIC's Beyond dmesg, there is a set of commands I can't remember, that illustrate details about LINUX devices specifically NIC's, lspci is one of them but I'm stuck trying to learn the differences…
Karen3819x4
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Why is there a c:\windows\syswow64\userinit.exe on 64 bit versions of windows?

Windows internals makes it clear than winlogon.exe after authenticating with lsass.exe launches the contents of the UserInit key, which by default is c:\windows\system32\userinit.exe to set up the environment and then launches whatever is…
Dan
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