Fwd: Re: RFR: 8062536: [TESTBUG] Conflicting GC combinations in jdk tests

Yekaterina Kantserova yekaterina.kantserova at oracle.com
Thu Nov 6 13:35:57 UTC 2014


Thanks a lot!

On 11/06/2014 02:05 PM, Evgeniya Stepanova wrote:
> Hi Katja,
>
> Ok, this seems to be a perfect solution. Thank you. I'll change the 
> diff accordingly.
>
>
> Thanks,
> Evgeniya Stepanova
> On 06.11.2014 16:56, Yekaterina Kantserova wrote:
>> Hi Dima,
>>
>> On 11/06/2014 11:22 AM, Dmitry Fazunenko wrote:
>>> Hi Katja,
>>>
>>> You are right, there will be no conflict, because test ignores any 
>>> external VM flags.
>>> So, adding @requires seems unnecessary here, but...
>>>
>>> Ignoring external options is bad thing, such "selfish" tests are not 
>>> applicable for other areas, like GC, compiler, RT.
>>
>> This particular case is to test the defined flags are shown up as 
>> expected.
>>
>> Evgeniya,
>>
>> would you mind to change JpsHelper.java instead?
>>
>> +++ b/test/sun/tools/jps/JpsHelper.java
>> @@ -93,7 +93,7 @@
>>      /**
>>       * VM arguments to start test application with
>>       */
>> -    public static final String[] VM_ARGS = {"-Xmx512m", 
>> "-XX:+UseParallelGC"};
>> +    public static final String[] VM_ARGS = {"-Xmx512m", 
>> "-XX:+PrintGCDetails"};
>>      /**
>>       * VM flag to start test application with
>>       */
>>
>> Best regards,
>> Katja
>>
>>
>>
>>>
>>> @requires  will allow to modify tests to include external vm options 
>>> without any risk of bumping into conflict and extend area of test 
>>> applicability.
>>>
>>> But if you still believe, that @requires is not necessary - it's not 
>>> a problem, tests could be kept as is.
>>>
>>> Thanks,
>>> Dima
>>>
>>>
>>> On 06.11.2014 16:27, Yekaterina Kantserova wrote:
>>>>
>>>> Hi Evgeniya,
>>>>
>>>> As David has pointed out these jps tests are not testing gc. The 
>>>> -XX:+UseParallelGC is just an arbitrary chosen test flag. There 
>>>> should not be any conflicts either since these tests are running in 
>>>> driver mode:
>>>>
>>>> ...
>>>>  * @run driver TestJpsJar
>>>> ...
>>>>
>>>> which means no flags from above are accepted.
>>>>
>>>> Thanks,
>>>> Katja
>>>>
>>>>
>>>>
>>>> On 11/06/2014 11:05 AM, Evgeniya Stepanova wrote:
>>>>> Hi David,
>>>>>
>>>>> tag added because tests contain string
>>>>>  cmd.addAll(JpsHelper.getVmArgs());
>>>>>
>>>>> and JpsHelper defines
>>>>> ...
>>>>> public static final String[] VM_ARGS = {"-Xmx512m", 
>>>>> "-XX:+UseParallelGC"};
>>>>> ...
>>>>> public static List<String> getVmArgs() throws IOException {
>>>>>         if (testVmArgs == null) {
>>>>>             testVmArgs = new ArrayList<>();
>>>>>             testVmArgs.addAll(Arrays.asList(VM_ARGS));
>>>>>             testVmArgs.add("-XX:Flags=" + 
>>>>> getVmFlagsFile().getAbsolutePath());
>>>>>         }
>>>>>         return testVmArgs;
>>>>>     }
>>>>>
>>>>> Tests itself wouldn't fail if we use another GC, tag added for 
>>>>> cleanup-if we use for example SerialGC we must be sure that tests 
>>>>> passed with this GC, not with another one. Now you will assume 
>>>>> that concrete test passed with Serial GC, but it run only with 
>>>>> Parallel GC. Plus there is no any sense to run test twice in TC 
>>>>> (with different GC, since it use only Parallel)
>>>>>
>>>>> Thanks,
>>>>> Evgeniya Stepanova
>>>>> On 06.11.2014 6:20, David Holmes wrote:
>>>>>> Hi Evgeniya,
>>>>>>
>>>>>> On 6/11/2014 1:33 AM, Evgeniya Stepanova wrote:
>>>>>>> Hi,
>>>>>>>
>>>>>>> Please review changes for 8062536, the OpenJDK/jdk part of the 
>>>>>>> JDK-8019361
>>>>>>>
>>>>>>> bug: https://bugs.openjdk.java.net/browse/JDK-8062536
>>>>>>> fix: http://cr.openjdk.java.net/~eistepan/8062536/webrev.00/
>>>>>>>
>>>>>>> Problem: Some tests explicitly set GC and fail when another GC 
>>>>>>> is set
>>>>>>> outside
>>>>>>
>>>>>> I don't see why you have done this for the
>>>>>>
>>>>>> test/sun/tools/jps/TestJps*.java
>>>>>>
>>>>>> tests. They don't set any GC flags.
>>>>>>
>>>>>>> Solution: Such tests marked with the jtreg tag "requires" to 
>>>>>>> skip test
>>>>>>> if there is a conflict
>>>>>>
>>>>>> Just wondering: Does a skipped test get a .jtr file showing it 
>>>>>> was skipped; or does it only appear in the higher-level jtreg log?
>>>>>>
>>>>>> Thanks,
>>>>>> David
>>>>>>
>>>>>>> Tested locally with different GC flags (-XX:+UseG1GC,
>>>>>>> -XX:+UseParallelGC, -XX:+UseSerialGC, -XX:+UseConcMarkSweep and 
>>>>>>> without
>>>>>>> any GC flag). Tests are being excluded as expected. No tests failed
>>>>>>> because of the conflict.
>>>>>>>
>>>>>>> Thanks,
>>>>>>> Evgeniya Stepanova
>>>>>>>
>>>>>>> //
>>>>>
>>>>> -- 
>>>>> /Evgeniya Stepanova/
>>>>
>>>>
>>>>
>>>
>>
>
> -- 
> /Evgeniya Stepanova/

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