[JDK9] RFR(XXS): JDK-8036576 - jtreg failed on Test6792161 timed out

S. Bharadwaj Yadavalli bharadwaj.yadavalli at oracle.com
Fri Mar 14 16:18:54 UTC 2014

Please review the proposed change to timeout value for the test. The 
reasoning for the increase is as follows:

When the test is run using fastdebug VM, it executes additional debug 
code. Verification of IR during Range Check Elimination phase of C1 
compiler is one such additional debug code executed. The runtime 
complexity of verification step is non-linear. Specifically, the 
execution of this test forces compilation and sets an increased inlining 
size. The increased inlining size results in increased size of 
compilation units in (at least some) method compilations. Consequently, 
the IR verification consumes significant portion of runtime. Execution 
of the test using a fastdebug VM built with tip of hotspot-comp tree

$ time 
-Xcomp -XX:MaxInlineSize=120 Test6792161
real 4m19.321s
user 4m19.636s
sys 0m0.719s

compared to that using hotspot built without the the above verification:

$ time 
-Xcomp -XX:MaxInlineSize=120 Test6792161

real 1m31.486s
user 1m31.863s
sys 0m0.743s

So, it appears that the timeout value needs to be increased from 300 if 
we use fastdebug VM to run this test.

Changeset at http://cr.openjdk.java.net/~bharadwaj/8036576/webrev_0/
Bug report at https://bugs.openjdk.java.net/browse/JDK-8036576



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