64bit computer වලට ඉතා විශාල RAM දාරිතාවක් අවශ්ය ඇයි?
64bit computer වල තියෙන එකම අවාසිය වනෙ මෙයයි එනම් 32bit computer වලට වඩා RAM මතකය අවශ්ය වීම..මොකද 64bit වලදි allocate කරන data length එක 32bit වල data length එකට වඩා වැඩි නිසා…
Yakooo boru denna epa!!!!!!!!!!!!!!
Ehema ekak na...
64 bit walata 4GB walata wada ram handle karanna puluwan... nathuwa 64bit una kiyala wadiyen ram ona wenne na
The main disadvantage of 64-bit architectures is that relative to 32-bit architectures, the same data occupies more space in memory (due to swollen pointers and possibly other types and alignment padding). This increases the memory requirements of a given process and can have implications for efficient processor cache utilization. Maintaining a partial 32-bit model is one way to handle this and is in general reasonably effective. For example, the
z/OS operating system takes this approach currently, requiring program code to reside in 31-bit address spaces (the high order bit is not used in address calculation on the underlying hardware platform) while data objects can optionally reside in 64-bit regions.
Currently, most proprietary
x86 software is compiled into 32-bit code, with less being also compiled into 64-bit code (although the trend is rapidly equalizing[
citation needed]), so much does not take advantage of the larger 64-bit address space or wider 64-bit registers and data paths on x86 processors, or the additional registers in 64-bit mode. However, users of most RISC platforms, and users of
free or
open source operating systems (where the
source code is available for recompiling with a 64-bit compiler) have been able to use exclusive 64-bit computing environments for years. Not all such applications require a large address space nor manipulate 64-bit data items, so they wouldn't benefit from the larger address space or wider registers and data paths. The main advantage to 64-bit versions of such applications is the ability to access more registers in the
x86-64 architecture.
source wiki
http://en.wikipedia.org/wiki/64-bit
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