profile interpreter and JIT

[Xin Tong]

On Thu, Aug 23, 2012 at 1:20 PM, Krystal Mok <rednaxelafx at gmail.com> wrote:
> The DynamicCodeGenerated event is for ALL dynamically generated code that
> are not compiled Java methods.
> Its counterpart for compiled Java methods is the CompiledMethodLoad event.
> Both event are implemented and functioning in HotSpot VM. Oprofile uses both
> of these events for "JIT" support (where the term "JIT" actually stands for
> all dynamically generated code).
>
> And, just as Christian asked, what exactly is it that you're trying to
> measure?
>
> Just in case: HotSpot VM's implementation of the DynamicCodeGenerated event
> takes all of the dynamically generated interpreter code as a whole, under
> the name "Interpreter"; it doesn't provide enough detail for you to
> differentiate between the bytecode handlers.
This is what i wanted.

Thanks

Xin

>
> - Kris
>
>
> On Fri, Aug 24, 2012 at 2:55 AM, Xin Tong <xerox.time.tech at gmail.com> wrote:
>>
>> this code is not used to register the interpreter routines right now. is
>> it ?
>>
>> Xin
>>
>>
>> On Thu, Aug 23, 2012 at 10:29 AM, Krystal Mo <krystal.mo at oracle.com>
>> wrote:
>> > Hi Xin,
>> >
>> > There's a JVMTI event that does the trick: DynamicCodeGenerated
>> >
>> > http://docs.oracle.com/javase/7/docs/platform/jvmti/jvmti.html#DynamicCodeGenerated
>> > Use it to do whatever registration needed.
>> >
>> > - Kris
>> >
>> >
>> > On 2012/8/24 0:21, Xin Tong wrote:
>> >>
>> >> I want to measure the amount of time spend in the interpreter and the
>> >> JIT in hotspot. since the interpreter is dynamically generated when
>> >> the VM starts. how can one get that statistics. maybe oprofile can do
>> >> that, but does not the interpreter need to register the generated
>> >> interpreter routine with the profiler ? is this code in hotspot ?
>> >>
>> >> Xin
>
>