RFR(S): 8198915: [Graal] 3rd testcase of compiler/types/TestMeetIncompatibleInterfaceArrays.java takes more than 10 mins

Vladimir Kozlov vladimir.kozlov at oracle.com
Tue Mar 27 17:50:22 UTC 2018

Looks good.

Is there difference between "C2 (tier 4)" and "C2 (tier4)" in tier[][] 
except space?


On 3/27/18 10:37 AM, Volker Simonis wrote:
> Hi,
> can I please have a review for the following test-only change:
> http://cr.openjdk.java.net/~simonis/webrevs/2018/8198915
> https://bugs.openjdk.java.net/browse/JDK-8198915
> When I wrote this test back in 2015, the WhiteBox API was not powerful
> enough (or I simply wasn't smart enough to use it :) so I used a lot
> of -XX options in order to run a method three times in a round where
> every execution was done at another compilation level (i.e.
> interpreted, C1 and C2). Unfortunately, the required redefinition of
> compiler counters and thresholds massively slows down Graal as can be
> seen in the bug report.
> I've therefore changed the test to use the Whitbox API to achieve the
> same test compilation without the need to redefine the global JIT
> compiler counters and thresholds.
> Thank you and best regards,
> Volker

More information about the hotspot-dev mailing list