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

Vladimir Kozlov vladimir.kozlov at oracle.com
Thu Aug 21 23:07:19 UTC 2014

Thanks you, Igor


On 8/21/14 3:59 PM, Igor Veresov wrote:
> Looks good.
> igor
> 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