Request for reviews (M): 7006505: Use kstat info to identify SPARC processor
David.Holmes at oracle.com
Wed Dec 15 01:35:39 PST 2010
This isn't a sparcworks option but a VM option. So although I hate to
see platform specific code in vm.make I think that is the right file in
which to add the -lkstat flag
Vladimir Kozlov said the following on 12/15/10 11:36:
> Fixed 7006505: Use kstat info to identify SPARC processor
> Currently we use cpu count (32) to distinguish T1 Sparc
> from latest T processors and it is not clear when/if we can
> get an interface which provides information we need.
> It was suggested to read Solaris kstat data to get more
> precise CPU information:
> implementation: UltraSPARC-T2+ (chipid 0, clock 1414 MHz)
> Unfortunately Solaris 8 (used to build JDK6) has different
> kstat structure vs Solaris 10 (used to build JDK7) so
> I have to work around this problem.
> Verified with JPRT build and test for jdk6 and jdk7.
> Additional changes:
> Renamed is_niagara1 to is_niagara since it checks for
> T family cpus not just T1.
> Reduced heap size for test_gamma to -Xmx32m since
> 64bit VM reserves 1/4 of physical memory by default.
> Fixed print format for reserved heap size.
> Print compressed oops mode with -XX:+PrintMiscellaneous -XX:+Verbose.
> Add check for VIS3.
> Use FXTOD and FXTOS on T series and SPARC64
> (tested with microbenchmark).
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