Hi! ----
While looking at "isaexec" machinery which selects the ksh93 binary to be used I realised that it uses /usr/bin/i86/ksh93 on a Solaris version which supports as minimum version the Intel Pentium-1 (or higher) ... ... my proposal would be to bump the default optimisation settings up to match the minimum supported hardware for better performace - the question is: Which flags should we use ? - For SPARC we have the choice between the currenty used "sparcv8" or "sparcv8plus" - "sparcv8plus" has the advantage of native 64bit registers but there is a warning in http://cvs.opensolaris.org/source/xref/on/usr/src/lib/libc/sparc/threads/sparc.il#58 which makes me worry about binary compatiblity: -- snip -- We can't compile the 32-bit libc with -xarch=v8plus because then %g5 would become a scratch register and we would break 32-bit applications that use %g5 as an invariant register. -- snip -- ... which simply raises the question whether we can mix "sparcv8" and "sparcv8plus" code in one application. I guess the answer is "no"... but I am not sure and I can't remember anymore since I am now more than 96h awake... ;-( Does anyone know whether a "sparcv8" application can link to a library which was compiled with "sparcv8plus" ? - For x86 I think we can use "-xarch=pentium_pro" (or -xtarget=pentium_pro ?) and move the binary to /usr/bin/pentium_pro/ksh93 ... are there any objections against that ? ---- Bye, Roland -- __ . . __ (o.\ \/ /.o) [EMAIL PROTECTED] \__\/\/__/ MPEG specialist, C&&JAVA&&Sun&&Unix programmer /O /==\ O\ TEL +49 641 7950090 (;O/ \/ \O;) _______________________________________________ perf-discuss mailing list perf-discuss@opensolaris.org
