OpenJDK rebuilding on windows takes a long time

[Dmitry Samersoff]

Ioi,

Approx the same task on 8GB CoreI5 laptop (Gentoo Linux, XFS, SSD
drive), takes about a minute:

real    1m14.854s
user    1m43.881s
sys     0m6.344s

So the problem may reside in IO speed of the virtual environment.

-Dmitry

On 2013-02-15 06:04, Ioi Lam wrote:
> On 02/14/2013 02:24 AM, Alexander Scherbatiy wrote:
>> On 2/13/2013 8:45 PM, Kelly O'Hair wrote:
>>> You are pointing at the fastdebug jdk as your boot jdk, why?
>>>
>>> The official boot jdk for jdk8 is jdk7u7 we cannot guarantee anything
>>> else will work, although it should,
>>> when tracking down issues like this, you need to narrow down all the
>>> possible differences.
>>>
>>> I have no idea at this time what the 'sync state' is with the awt
>>> team forest.
>>> My recommendation would be to clone the official jdk8/jdk8 forest,
>>> which can be assumed to work since
>>> RE should have built it, or any integrator pushing changes into it
>>> should have built it.
>>> Create 2 forests of so you can do separate experiments on each.
>>     The question was about time rebuilding JDK after a small change.
>>
>>    What time does it take to rebuild the official  jdk8/jdk8 forest
>> with default options after small change in the java file like
>> javax.swing.JFrame ?
> 
> 
> FYI:
> 
> I am running on Oracle Enterprise Linux 5.0 with official jdk1.7.0_09 as
> my boot jdk. It's a virtual host with
> Xeon E5-2690 (only 2 cores allocated) and 12 GB RAM. JDK sources is put
> on local disk. A one-liner change in URLClassLoader.java takes about 4
> minutes. I didn't specify sjavac when running configure.
> 
> ----- Build times -------
> Start 2013-02-14 12:12:14
> End   2013-02-14 12:16:13
> 00:00:00 corba
> 00:00:01 demos
> 00:00:12 hotspot
> 00:00:23 images
> 00:00:00 jaxp
> 00:00:00 jaxws
> 00:03:23 jdk
> 00:00:00 langtools
> 00:03:59 TOTAL
> -------------------------
> Finished building Java(TM) for target 'images'
> 
> Is there an option in the makefiles to compile ONLY the .java file
> that's changed (assuming I know the changes won't affect other classes)?
> 
> - Ioi
> 
>>    Is sjavac are enabled by default now in the  official  jdk8/jdk8? 
>> If no,  what time does it take to rebuild the JDK with the
>> --enable-sjavac option?
>>
>>    Thanks,
>>    Alexandr.
>>
>>> Then do the build from the root with a 7u7 jdk in your PATH (no need
>>> for the --with-boot-jdk option).
>>> Do a build without --enable-sjavac on one forest, then with it on the
>>> other.
>>>
>>> -kto
>>>
>>> On Feb 13, 2013, at 3:38 AM, Alexander Scherbatiy wrote:
>>>
>>>> On 2/11/2013 4:03 PM, Erik Joelsson wrote:
>>>>> The long term solution to this is sjavac. I do not know if it has
>>>>> made it into that forest yet. You can try by adding --enable-sjavac
>>>>> to configure and do a clean build. If the build works, you have it,
>>>>> and incremental builds will be much faster.
>>>>    I tried to use the --enable-sjavac option and JDK 7 and 8 as a
>>>> boot JDK.
>>>> --with-boot-jdk=/cygdrive/c/Sun/Tools/JDK/jdk7/7u14/b10/jdk1.7.0_14/fastdebug
>>>> --with-target-bits=32 --enable-sjavac
>>>>        gives compilation error
>>>>
>>>> --with-boot-jdk=/cygdrive/c/Sun/Tools/JDK/jdk8/b75/jdk1.8.0/fastdebug --with-target-bits=32
>>>> --enable-sjavac
>>>>       gives "OutOfMemoryError: Java heap space" error.
>>>>
>>>>    The log files are attached.
>>>>
>>>>    Thanks,
>>>>    Alexandr.
>>>>
>>>>> /Erik
>>>>>
>>>>> On 2013-02-11 12:22, Alexander Scherbatiy wrote:
>>>>>> On 2/8/2013 6:46 PM, Erik Joelsson wrote:
>>>>>>> Ccache is not supported on windows since it doesn't work with
>>>>>>> visual studio AFAIK.
>>>>>>>
>>>>>>> What kind of change did you do? Was it in native code or java and
>>>>>>> in which repository?
>>>>>>   I use the http://hg.openjdk.java.net/jdk8/awt repository, edit
>>>>>> java code and build the jdk.
>>>>>> To reproduce the issue:
>>>>>>   - open the javax.swing.JFrame class and add a comment line:
>>>>>>     // a comment
>>>>>>   - build jdk
>>>>>>
>>>>>> ----- Build times -------
>>>>>> Start 2013-02-11 15:09:55
>>>>>> End   2013-02-11 15:17:08
>>>>>> 00:00:03 corba
>>>>>> 00:00:02 hotspot
>>>>>> 00:00:01 jaxp
>>>>>> 00:00:03 jaxws
>>>>>> 00:06:54 jdk
>>>>>> 00:00:02 langtools
>>>>>> 00:07:13 TOTAL
>>>>>> -------------------------
>>>>>>
>>>>>> My environment:
>>>>>>   OS: Windows 7 Professional, x64
>>>>>>   Processor - Intel Core i7
>>>>>>   Memory - 8 GB
>>>>>>
>>>>>> The log file is attached.
>>>>>>
>>>>>> Thanks,
>>>>>> Alexandr.
>>>>>>> /Erik
>>>>>>>
>>>>
>>>> <jdk7_log.txt><jkd8_log.txt>
>>
> 


-- 
Dmitry Samersoff
Oracle Java development team, Saint Petersburg, Russia
* Give Rabbit time, and he'll always get the answer