How to change compilation policy to trigger C2 compilation ASAP?

[Vitaly Davidovich]

Is your goal specifically to have C2 compile or just to reach peak
performance quickly? It sounds like the latter.  What values did you
specify for the tier thresholds? Also, it may help you to
-XX:+PrintCompilation to tune the flags as this will show you which methods
are being compiled, when, and at what tier.

sent from my phone
On May 19, 2015 9:01 AM, "Tangwei (Euler)" <tangwei6 at huawei.com> wrote:

>  Hi All,
>
>   I want to run a JAVA application on a performance simulator, and do a
> profiling on a hot function JITTed with C2 compiler.
>
> In order to make C2 compiler compile hot function as early as possible, I
> hope to reduce the threshold of function invocation
>
> count in interpreter and C1 to drive the JIT compiler transitioned to
> Level 4 (C2) ASAP. Following is the option list I try, but
>
> failed to find a right combination to meet my requirement. Anyone can help
> to figure out what options I can use?
>
> Thanks in advance.
>
>
>
> -XX:Tier0ProfilingStartPercentage=0
>
> -XX:Tier3InvocationThreshold
>
> -XX:Tier3MinInvocationThreshold
>
> -XX:Tier3CompileThreshold
>
> -XX:Tier4InvocationThreshold
>
> -XX:CompileThreshold
>
> -XX:Tier4MinInvocationThreshold
>
> -XX:Tier4CompileThreshold
>
>
>
> Regards!
>
> wei
>
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