Bug ID: JDK-8277503 compiler/onSpinWait/TestOnSpinWaitAArch64DefaultFlags.java failed with "OnSpinWaitInst with the expected value 'isb' not found."

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JDK 17	JDK 18
17.0.3Fixed	18 b26Fixed

The following test failed in the JDK18 CI:

compiler/onSpinWait/TestOnSpinWaitAArch64DefaultFlags.java

Here's a snippet from the log file:

----------System.err:(12/904)----------
java.lang.RuntimeException: OnSpinWaitInst with the expected value 'isb' not found.
	at compiler.onSpinWait.TestOnSpinWaitAArch64DefaultFlags.checkFinalFlagsEqualTo(TestOnSpinWaitAArch64DefaultFlags.java:72)
	at compiler.onSpinWait.TestOnSpinWaitAArch64DefaultFlags.main(TestOnSpinWaitAArch64DefaultFlags.java:90)
	at java.base/jdk.internal.reflect.DirectMethodHandleAccessor.invoke(DirectMethodHandleAccessor.java:104)
	at java.base/java.lang.reflect.Method.invoke(Method.java:577)
	at com.sun.javatest.regtest.agent.MainWrapper$MainThread.run(MainWrapper.java:127)
	at java.base/java.lang.Thread.run(Thread.java:833)

JavaTest Message: Test threw exception: java.lang.RuntimeException: OnSpinWaitInst with the expected value 'isb' not found.
JavaTest Message: shutting down test

STATUS:Failed.`main' threw exception: java.lang.RuntimeException: OnSpinWaitInst with the expected value 'isb' not found.
----------rerun:(35/8023)*----------

Fix Request (17u) Fix of the test which is a part of JDK-8277137 backport. The original patch removed the test from test/hotspot/jtreg/ProblemList.txt. This change causes a conflict because the test does not exist and is not excluded in jdk17. The change to the test applies cleanly.
19-01-2022
A pull request was submitted for review. URL: https://git.openjdk.java.net/jdk17u-dev/pull/107 Date: 2022-01-19 16:00:18 +0000
19-01-2022
The fix for this issue is in jdk-18+25-1699.
23-11-2021
Changeset: 7b2d823e Author: Evgeny Astigeevich <eastig@amazon.com> Committer: Paul Hohensee <phh@openjdk.org> Date: 2021-11-23 20:05:57 +0000 URL: https://git.openjdk.java.net/jdk/commit/7b2d823e842e6a66dbe46b048da44ca9e5485c75
23-11-2021
That makes sense. Thanks for the quick response! And don't forget to un-problemlist the test with your fix ;-)
23-11-2021
ILW = Test failure for newly added test on aarch64, some occurrences in tier6 and only with specific CPU and with open release build, no workaround = MLH = P4
23-11-2021
Test was not run with a special flag. Seen only with aarch64 open release build: openjdk 18-ea 2022-03-15 OpenJDK Runtime Environment (build 18-ea+25-1650) OpenJDK 64-Bit Server VM (build 18-ea+25-1650, mixed mode, sharing) CPU info: CPU: total 8 (initial active 8) 0x41:0x3:0xd0c:1, fp, simd, evtstrm, aes, pmull, sha1, sha256, crc, lse, dcpop Test was added by JDK-8277137. [~eastigeevich] can you have a look at it?
23-11-2021
OnSpinWaitInst/OnSpinWaitInstCount are diagnostic options. The test fails only in release builds because 'XX:+PrintFlagsFinal' does not print diagnostic options in release builds. The fix is to use '-XX:+UnlockDiagnosticVMOptions'.
23-11-2021
I managed to reproduce the failure on one of my arm64 machines.
23-11-2021
Two Tier6 job sets in a row (so far)...
20-11-2021