Ioi,
> Dmitry, are you running with -Xshare:on? If you use -Xshare:off (which
> is the default), when the CDS archive cannot be mapped, the JVM will
> continue execution.
I use default parameters for java. i.e. ever simple
java -version
refuses to start with the message below.
> Are you having problems running with the jtreg test cases? I can think
> of a way to fix this, so that CDS can continue to work under this
> circumstance, but I want to understand your scenarios more.
Typical scenario is:
We have AArch64 Jenkins build server with 4k pages that automatically
- builds JDK
- deploy it to a large server with 64k pages
- run set of tests
(regression and performance, not all of them are jtreg one)
-Dmitry
On 09.01.20 20:02, Ioi Lam wrote:
>
>
> On 1/9/20 12:47 AM, David Holmes wrote:
>> On 9/01/2020 6:29 pm, Dmitry Samersoff wrote:
>>> Hello Ioi,
>>>
>>> *Story*
>>>
>>> If you build JDK-14 with the changes for
>>>
>>> JDK-8231610 Relocate the CDS archive if it cannot be mapped
>>> to the requested address
>>>
>>> on a machine with 4k pages (typical Jenkins machine) then move the
>>> bundle to a huge server with 64k pages, it refuses to start with
>>>
>>> [0.015s][error][cds] Unable to map CDS archive --
>>> os::vm_allocation_granularity() expected: 4096 actual: 65536
>>>
>>> *Question*
>>>
>>> I'm not sure if just removing an assert is the correct fix. What would
>>> you recommend?
>>
>> I thought that failing to map the archive was a non-fatal error that
>> just results in falling back to not using CDS. Even in a debug build
>> this should not be an assertion unless perhaps the user has explicitly
>> requested CDS to be enabled.
>>
> Dmitry, are you running with -Xshare:on? If you use -Xshare:off (which
> is the default), when the CDS archive cannot be mapped, the JVM will
> continue execution.
>
> Are you having problems running with the jtreg test cases? I can think
> of a way to fix this, so that CDS can continue to work under this
> circumstance, but I want to understand your scenarios more.
>
> Thanks
> - Ioi
>
>>> Also @build-dev - is it possible to add configure option to disable
>>> AppCDS archive generation?
>>
>> Already there I think: --disable-cds-archive
>>
>> Cheers,
>> David
>> -----
>>
>>
>>>
>>> -Dmitry\S
>>>
>>>
>>>
>
