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Full Discussion: 32bit or 64 bit
Operating Systems Solaris 32bit or 64 bit Post 302312595 by jlliagre on Saturday 2nd of May 2009 03:49:35 AM
Old 05-02-2009
The main advantage of 64 bit is obviously the larger addressing space which allows a process to access more than 4 GB (eg. memory mapped file). Other advantages include faster operations when dealing with 64 bit data (eg: cryptography) and extra registers for FP.

Disadvantages includes larger binaries (typically 10 to 30%) and memory usage that made general purpose applications sometimes running slightly slower when 64 bit, the reason why most userland in Solaris is provided as 32 bit.

You cannot mix 64 bit applications with 32 bit libraries but 32 bit binaries run very well on top of a 64 bit kernel. There is no 32 bit Solaris kernel anyway for a T5220.

Have a look there for more details:
Solaris 64-bit Developer's Guide - Sun Microsystems
 

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platform::shell(n)					       Tcl Bundled Packages						platform::shell(n)

__________________________________________________________________________________________________________________________________________________

NAME
platform::shell - System identification support code and utilities SYNOPSIS
package require platform::shell ?1.1.4? platform::shell::generic shell platform::shell::identify shell platform::shell::platform shell _________________________________________________________________ DESCRIPTION
The platform::shell package provides several utility commands useful for the identification of the architecture of a specific Tcl shell. This package allows the identification of the architecture of a specific Tcl shell different from the shell running the package. The only requirement is that the other shell (identified by its path), is actually executable on the current machine. While for most platform this means that the architecture of the interrogated shell is identical to the architecture of the running shell this is not generally true. A counter example are all platforms which have 32 and 64 bit variants and where a 64bit system is able to run 32bit code. For these running and interrogated shell may have different 32/64 bit settings and thus different identifiers. For applications like a code repository it is important to identify the architecture of the shell which will actually run the installed packages, versus the architecture of the shell running the repository software. COMMANDS
platform::shell::identify shell This command does the same identification as platform::identify, for the specified Tcl shell, in contrast to the running shell. platform::shell::generic shell This command does the same identification as platform::generic, for the specified Tcl shell, in contrast to the running shell. platform::shell::platform shell This command returns the contents of tcl_platform(platform) for the specified Tcl shell. KEYWORDS
operating system, cpu architecture, platform, architecture platform::shell 1.1.4 platform::shell(n)
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