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List:       openjdk-hotspot-runtime-dev
Subject:    Re: RFR: 8231471: Obsolete -XX:CompilationPolicyChoice
From:       Tobias Hartmann <tobias.hartmann () oracle ! com>
Date:       2019-09-27 8:27:23
Message-ID: b3e6445c-04f8-29ec-5ce2-89db85b70890 () oracle ! com
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+1

Best regards,
Tobias

On 26.09.19 18:32, Vladimir Kozlov wrote:
> Good.
> 
> Thanks,
> Vladimir
> 
> On 9/26/19 6:27 AM, Claes Redestad wrote:
>> Hi,
>>
>> CompilationPolicyChoice was deprecated in 13 with the goal of obsoleting
>> it in 14.
>>
>> Webrev: http://cr.openjdk.java.net/~redestad/8231471/webrev.00/
>> Bug:       https://bugs.openjdk.java.net/browse/JDK-8231471
>>
>> Since removing CompilationPolicyChoice makes it impossible to select and
>> run the StackWalkCompPolicy I've removed that code, along with 2 develop
>> flags only used by it.
>>
>> StackWalkCompPolicy was the C2 default before 6, but abandoned in favor
>> of the simpler C1 policy since it resulted in better startup and similar
>> or better performance[1]. The choice to go back has remained as an
>> undocumented options, and we've seen no reports of it being used.
>>
>> Testing: tier1-3
>>
>> Thanks!
>>
>> /Claes
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