[9] RFR(S): 8059390: code cache fills up for bigapps/Weblogic+medrec/nowarnings

Zoltán Majó zoltan.majo at oracle.com
Tue Sep 30 14:13:24 UTC 2014


please review the following patch (contributed by Tobias Hartmann):

Bug: https://bugs.openjdk.java.net/browse/JDK-8059390

Problem: The code cache fills up for the test 
bigapps/Weblogic+medrec/nowarnings. Affected platforms are: linux_x64, 
solaris_sparcv9, windows_x64-64, solaris_x64, with tiered compilation 
both on/off.

Solution: The bug is caused by the segmented code cache changes 
JDK-8015774. The problem is that with -XX:-SegmentedCodeCache 
'CodeCache::reverse_free_ratio' always returns 0 because 
'CodeCache::get_code_heap' returns NULL for 
CodeBlobType::MethodNonProfiled and CodeBlobType::MethodProfiled.

Retrieve code heap in CodeCache ::allocate(), in 
CodeCache::report_codemem_full(), and in 
CodeCache::unallocated_capacity() also if segmented code cache is disabled.

Webrev: http://cr.openjdk.java.net/~zmajo/8059390/webrev.00/


Aurora Weblogic+medrec on solaris_x64, solaris_sparcv9 and linux_amd64.

Thank you and best regards,


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