Dr Andrew John Hughes
gnu_andrew at member.fsf.org
Mon Feb 14 20:23:20 UTC 2011
2011/2/14 Dmytro Sheyko <dmytro_sheyko at hotmail.com>:
> I can see that such system property as "sun.cpu.isalist" is not set on
> Linux, but it is set on Solaris and Windows.
> What is the purpose of this property and shouldn't it be set on Linux as
On Solaris, it includes the results of a call to sysinfo(SA_ISALIST,
Copy into the array pointed to by buf the names of the variant
instruction set architectures executable on the current system.
The names are space-separated and are ordered in the sense of best
performance. That is, earlier-named instruction sets might contain
more instructions than later-named instruction sets; a program that
is compiled for an earlier-named instruction set will most likely
run faster on this machine than the same program compiled for a
later-named instruction set.
Programs compiled for an instruction set that does not appear in
the list will most likely experience performance degradation or not
run at all on this machine.
The instruction set names known to the system are listed in isal-
ist(5); these names might not match predefined names or compiler
options in the C language compilation system.
This command is obsolete and might be removed in a future release.
See getisax(2) and the Linker and Libraries Guide for a better way
to handle instruction set extensions.
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