[jboss-dev] Interesting JBAS profiling results

[Jaikiran Pai]

The latest numbers (from my laptop) as of Wednesday night against AS 
trunk are here http://pastebin.com/fc3a7ad0 (also attached is the html 
version). The WARDeployer which in it's start() method just does a 
web.xml parsing through JBossXB seems to be taking 713 milli seconds 
which seems to be on a higher side. There are other things like 
TransactionManager too which are taking time (probably because the 
configuration file involves usage of @JMX which triggers AOP?).

I also got the number of deployers per stage that are currently used in 
AS trunk. The output is attached.

-Jaikiran


Scott Marlow wrote:
> FYI,  http://pastebin.com/m7325e91f   contains a breakdown of how long 
> each component took to deploy in milliseconds (with trunk source as of 
> this morning).
> Scott Marlow wrote:
>> It might also be interesting to see what the total deployment time is 
>> per bean and how that might relate to the timings below.  Do we have 
>> a way to do that (maybe via an interceptor)?
>>
>> David M. Lloyd wrote:
>>> I was talking to Jason G on the phone, and he had an interesting 
>>> idea: what happens when we profile the AS and look at the results by 
>>> package rather than method?  This should give us a rough idea, by 
>>> project, of where our startup time is being spent.  So I took a 
>>> couple minutes and did just that, with some interesting results.
>>>
>>> First, results for a minimal startup (results under 2% omitted):
>>>
>>> 9.7% - 2,418 ms - 41,306 hot spot inv. org.jboss.aop.pointcut
>>> 8.3% - 2,063 ms - 38,480 hot spot inv. 
>>> org.jboss.reflect.plugins.introspection
>>> 5.9% - 1,461 ms - 373,799 hot spot inv. org.jboss.aop
>>> 5.7% - 1,415 ms - 52,528 hot spot inv. 
>>> org.jboss.virtual.plugins.context.zip
>>> 5.7% - 1,411 ms - 294,922 hot spot inv. 
>>> org.jboss.virtual.plugins.context
>>> 5.0% - 1,245 ms - 672,024 hot spot inv. org.jboss.aop.pointcut.ast
>>> 3.6% - 893 ms - 7,928 hot spot inv. org.jboss.classloader.spi.base
>>> 3.0% - 735 ms - 17,241 hot spot inv. org.jboss.dependency.plugins
>>> 2.9% - 720 ms - 20,215 hot spot inv. org.jboss.aop.util
>>> 2.8% - 697 ms - 150,242 hot spot inv. org.apache.log4j
>>> 2.6% - 636 ms - 272,879 hot spot inv. org.jboss.reflect.plugins
>>> 2.2% - 550 ms - 72,341 hot spot inv. org.jboss.metadata.plugins.context
>>>
>>> As you can see, a minimal startup is dominated by AOP with VFS being 
>>> a not-so-close second.
>>>
>>> Next, a default startup, which shows somewhat different behavior:
>>>
>>> 10.5% - 25,156 ms - 5,827,279 hot spot inv. 
>>> org.jboss.virtual.plugins.context
>>> 8.5% - 20,320 ms - 1,232,357 hot spot inv. 
>>> org.jboss.virtual.plugins.context.zip
>>> 6.6% - 15,822 ms - 1,054,169 hot spot inv. 
>>> org.jboss.virtual.plugins.vfs.helpers
>>> 6.4% - 15,319 ms - 297,465 hot spot inv. org.jboss.aop.pointcut
>>> 5.9% - 14,256 ms - 237,457 hot spot inv. org.jboss.dependency.plugins
>>> 5.1% - 12,148 ms - 6,769,258 hot spot inv. org.jboss.metadata.spi.scope
>>> 4.7% - 11,254 ms - 72,717 hot spot inv. javassist.bytecode
>>> 4.2% - 10,132 ms - 8,205,516 hot spot inv. org.jboss.dependency.spi
>>> 3.5% - 8,426 ms - 2,308,354 hot spot inv. org.jboss.aop
>>> 3.2% - 7,713 ms - 4,109,176 hot spot inv. org.jboss.aop.pointcut.ast
>>> 2.7% - 6,575 ms - 182,581 hot spot inv. 
>>> org.jboss.reflect.plugins.introspection
>>> 2.7% - 6,366 ms - 52,818 hot spot inv. org.jboss.classloader.spi.base
>>> 2.2% - 5,284 ms - 333,613 hot spot inv. org.jboss.mx.server
>>>
>>> VFS, AOP, metadata, classloading.  If I separate out filtered 
>>> classes, it's basically the same story:
>>>
>>> 17.4% - 42,348 ms - 53,786,066 hot spot inv. java.lang
>>> 8.4% - 20,408 ms - 5,827,335 hot spot inv. 
>>> org.jboss.virtual.plugins.context
>>> 8.2% - 19,943 ms - 21,005,518 hot spot inv. java.util
>>> 5.6% - 13,706 ms - 1,232,359 hot spot inv. 
>>> org.jboss.virtual.plugins.context.zip
>>> 4.5% - 11,068 ms - 297,465 hot spot inv. org.jboss.aop.pointcut
>>> 3.5% - 8,531 ms - 72,717 hot spot inv. javassist.bytecode
>>> 3.4% - 8,266 ms - 6,769,258 hot spot inv. org.jboss.metadata.spi.scope
>>> 3.3% - 8,106 ms - 1,054,287 hot spot inv. 
>>> org.jboss.virtual.plugins.vfs.helpers
>>> 3.2% - 7,754 ms - 237,461 hot spot inv. org.jboss.dependency.plugins
>>> 2.8% - 6,787 ms - 8,205,588 hot spot inv. org.jboss.dependency.spi
>>> 2.4% - 5,964 ms - 2,308,354 hot spot inv. org.jboss.aop
>>> 2.3% - 5,524 ms - 52,818 hot spot inv. org.jboss.classloader.spi.base
>>> 2.2% - 5,316 ms - 4,109,176 hot spot inv. org.jboss.aop.pointcut.ast
>>>
>>> So it looks to me like we ought to be focusing our optimization 
>>> efforts on VFS and AOP, maybe classloading as well.  I encourage 
>>> folks to play around with profiling this way; it's fairly illuminating.
>>>
>>> - DML
>>>
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>>
>>
>
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