RFR (S) 8073705: more performance issues in class redefinition
coleen.phillimore at oracle.com
Mon Apr 27 17:49:56 UTC 2015
This looks nice. I thought this change was going to delay calling
AdjustCpoolCacheAndVtable until the end of the redefinition, rather than
for each class, so was a bit confused by the change.
Your change is a nice cleanup and improves MethodHandle method
Your backport may not be simple for jdk8 because PreviousVersionNode is
another type and not an InstanceKlass. Maybe you've convinced me that
it's worth backporting those changes too. Let me know.
On 4/10/15, 4:29 PM, serguei.spitsyn at oracle.com wrote:
> Hi Coleen and Dan,
> This is the second class redefinition scalability/optimization fix
> that is in my queue to push into 9 and 8u60.
> The approach is similar to the first one but much smaller.
> For convenience, these are the links to the first scalability fix:
> Bug report: https://bugs.openjdk.java.net/browse/JDK-8073705
> Open webrev:
> Please, let me know if you have any chance to review this.
> This is the last one that is waiting for your attention! :)
> On 3/26/15 7:38 PM, serguei.spitsyn at oracle.com wrote:
>> Please, review the fix for:
>> Open hotspot webrev:
>> This is the 2-nd round of performance/calability fixes in class
>> This time, the two remaining issues that were left alone in the
>> first round fix:
>> - optimized ConstantPoolCache::adjust_method_entries() is used
>> for previous versions
>> - the MemberNameTable::adjust_method_entries() has been
>> optimized too
>> - some cleanup
>> In progress: nsk redefine classes tests, JTREG
>> java/lang/instrument, com/sun/jdi
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