FW: is this a bug ?

[Aleksey Shipilev]

Hi,

Can you be more specific, what the failure is?

-Aleksey

On 10/16/19 3:06 AM, Yangfei (Felix) wrote:
> Forward to this list.  Can someone take a look please?
> 
> Thanks,
> Felix
> 
> From: Yangfei (Felix)
> Sent: Wednesday, August 14, 2019 2:56 PM
> To: 'code-tools-dev at openjdk.java.net' <code-tools-dev at openjdk.java.net>
> Subject: is this a bug ?
> 
> Hi,
> 
> We witnessed random fail for this test on our 64/128 core aarch64 server platform: org.openjdk.jcstress.tests.atomicity.buffers.DirectByteBufferViewsAtomicityTests.LongViewTest
> 
> After some investigation, we found one bug was introduced in this commit: http://hg.openjdk.java.net/code-tools/jcstress/rev/8c4495a44ffa
> 
> Patch is trivial:
> diff -r 7dce6af27fd5 tests-custom/src/main/java/org/openjdk/jcstress/tests/atomicity/buffers/DirectByteBufferViewsAtomicityTests.java
> --- a/tests-custom/src/main/java/org/openjdk/jcstress/tests/atomicity/buffers/DirectByteBufferViewsAtomicityTests.java  Sun Aug 11 10:37:40 2019 +0200
> +++ b/tests-custom/src/main/java/org/openjdk/jcstress/tests/atomicity/buffers/DirectByteBufferViewsAtomicityTests.java  Thu Aug 15 14:42:49 2019 +0800
> @@ -52,7 +52,7 @@
>          private final ShortBuffer sb;
> 
>          public MyState() {
> -            b = ByteBuffer.allocate(16);
> +            b = ByteBuffer.allocateDirect(16);
>              b.order(ByteOrder.nativeOrder());
>              ib = b.asIntBuffer();
>              cb = b.asCharBuffer();
>