RFR(S): 8209544: AES encrypt performance regression in jdk11b11

[Vladimir Kozlov]

Hi Dmitry,

What are (* bytes) values? Is it bytecode size? Why it is different?

Thanks,
Vladimir

On 9/5/18 8:50 AM, Dmitry Chuyko wrote:
> I made few runs on ThunderX2 (aarch64). It is funny but I see almost reverse difference in small.AESBench.encrypt: ~4% 
> regression for both -XX:-UseSwitchProfiling and patched version against current code. No difference for 
> full.AESBench.encrypt.
> 
> Stub code is the same and profiles differ slightly:
> 
> Mainline
>   53.91%        runtime stub  StubRoutines::aescrypt_encryptBlock (128 bytes)
>   29.76%        runtime stub  StubRoutines::aescrypt_encryptBlock (40 bytes)
>    7.64%         c2, level 4 com.sun.crypto.provider.CipherCore::doFinal, version 868 (356 bytes)
> 
> -XX:+UnlockExperimentalVMOptions -XX:-UseSwitchProfiling
>   57.08%        runtime stub  StubRoutines::aescrypt_encryptBlock (132 bytes)
>   26.95%        runtime stub  StubRoutines::aescrypt_encryptBlock (40 bytes)
>    7.85%         c2, level 4 com.sun.crypto.provider.CipherCore::doFinal, version 860 (384 bytes)
> 
> Patched
>   58.15%        runtime stub  StubRoutines::aescrypt_encryptBlock (132 bytes)
>   26.44%        runtime stub  StubRoutines::aescrypt_encryptBlock (40 bytes)
>    6.67%         c2, level 4 com.sun.crypto.provider.CipherCore::doFinal, version 866 (128 bytes)
> 
> -Dmitry
> 
> On 09/05/2018 11:05 AM, Roland Westrelin wrote:
>> Thanks for the review. Anyone else?
>>
>> Roland.
>