compiler/whitebox/ForceNMethodSweepTest.java failed during jdk9 b42 PIT due to

java.lang.RuntimeException: sweep shouldn't increase usage (assert failed: 1771136 <= 1770496)
at com.oracle.java.testlibrary.Asserts.error(Asserts.java:444)
at com.oracle.java.testlibrary.Asserts.assertTrue(Asserts.java:371)
at com.oracle.java.testlibrary.Asserts.assertLessThanOrEqual(Asserts.java:122)
at com.oracle.java.testlibrary.Asserts.assertLTE(Asserts.java:101)
at ForceNMethodSweepTest.test(ForceNMethodSweepTest.java:73)
at CompilerWhiteBoxTest.runTest(CompilerWhiteBoxTest.java:174)
at CompilerWhiteBoxTest.main(CompilerWhiteBoxTest.java:131)
at ForceNMethodSweepTest.main(ForceNMethodSweepTest.java:49)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at com.sun.javatest.regtest.MainWrapper$MainThread.run(MainWrapper.java:94)
at java.lang.Thread.run(Thread.java:745)