[9] RFR (S) 8055069: TSX and RTM should be deprecated more strongly until hardware is corrected

Igor Veresov igor.veresov at oracle.com
Thu Aug 21 22:59:54 UTC 2014

Looks good.


On Aug 21, 2014, at 3:09 PM, Vladimir Kozlov <vladimir.kozlov at oracle.com> wrote:

> http://cr.openjdk.java.net/~kvn/8055069/webrev/
> https://bugs.openjdk.java.net/browse/JDK-8055069
> Problem:
> "Errata HSW136. Software Using Intel® TSX May Result in Unpredictable System Behavior."
> Changes:
> Require to specify UnlockExperimentalVMOptions flag together with UseRTMLocking flag on un-patched systems where CPUID allows it but is unsupported otherwise. This would be for experiments and research and not for production applications as the name suggests.
> Give a warning on un-patched system when RTM is used.
> I have to adjust several jtreg RTM tests.
> Note, by default UseRTMLocking is off.
> I ran compiler jtreg tests on un-patched system and on machine without RTM.
> Thanks,
> Vladimir

More information about the hotspot-compiler-dev mailing list