RFR[XS] 8210040 [TESTBUG] TestOptionsWithRanges is very slow

[Vladimir Kozlov]

Ioi,

You don't need separate files. You can have several @test ... @run instructions in one file. Jtreg 
will run them as separate (but sequential tests). Example:

runtime//appcds/sharedStrings/FlagCombo.java

Thanks,
Vladimir

On 8/28/18 9:03 AM, Ioi Lam wrote:
> Hi Coleen,
> 
> Thanks for the review.
> 
> Splitting the test is a good suggestion. I've updated the webrev to split it into 10 parts. Now 
> fastdebug finishes in less than 2 minutes on my machines with 10 parallel tests.
> 
> http://cr.openjdk.java.net/~iklam/jdk12/8210040-TestOptionsWithRanges-slow.v02/
> 
> I split it by sorting the options and divide them up. I added some debug logs to make sure my 
> splitting code doesn't have arithmetic errors:
> 
> TestOptionsWithRanges_01.jtr:Generating subset [0 ... 32) of 32 tests out of 323 total tests
> TestOptionsWithRanges_02.jtr:Generating subset [32 ... 64) of 32 tests out of 323 total tests
> TestOptionsWithRanges_03.jtr:Generating subset [64 ... 96) of 32 tests out of 323 total tests
> TestOptionsWithRanges_04.jtr:Generating subset [96 ... 129) of 33 tests out of 323 total tests
> TestOptionsWithRanges_05.jtr:Generating subset [129 ... 161) of 32 tests out of 323 total tests
> TestOptionsWithRanges_06.jtr:Generating subset [161 ... 193) of 32 tests out of 323 total tests
> TestOptionsWithRanges_07.jtr:Generating subset [193 ... 226) of 33 tests out of 323 total tests
> TestOptionsWithRanges_08.jtr:Generating subset [226 ... 258) of 32 tests out of 323 total tests
> TestOptionsWithRanges_09.jtr:Generating subset [258 ... 290) of 32 tests out of 323 total tests
> TestOptionsWithRanges_10.jtr:Generating subset [290 ... 323) of 33 tests out of 323 total tests
> 
> Thanks
> 
> - Ioi
> 
> 
> On 8/28/18 5:25 AM, coleen.phillimore at oracle.com wrote:
>>
>> Thank you for doing this.  I ran into this test yesterday.  Is there any way to split this test 
>> into multiple tests?  I had a look at it and couldn't think of a way, since it parses the output 
>> of -XX:+PrintFlagsRanges, I believe.  Maybe alphabetically though, include/exclude some groups of 
>> flags?  Or maybe stop testing all the CMS flags.  Possibly another RFE.
>>
>> Your change looks good though.  It will help.
>>
>> Thanks,
>> Coleen
>>
>>
>> On 8/28/18 2:27 AM, Ioi Lam wrote:
>>> https://bugs.openjdk.java.net/browse/JDK-8210040
>>> http://cr.openjdk.java.net/~iklam/jdk12/8210040-TestOptionsWithRanges-slow.v01/
>>>
>>> TestOptionsWithRanges spawns over 1000 JVM processes that try to force GC.
>>> This scales very poorly on machines with lots of RAM. It timed out on my machine
>>> with 64GB RAM after an hour.
>>>
>>> The fix is to add -Xmx1024m to the command-line of the child processes. Also add
>>> -XX:-ZapUnusedHeapArea for fastdebug builds.
>>>
>>>
>>>
>>
>