huge java speedup on arm32 via java-1.8.0-openjdk-aarch32

[Jiri Vanek]

Hello good people of Fedora!

Most of you is probably facing very slow java (java-1.8.0-openjdk) on any arm32 device.
The luckier from you already tuned arm32 boards to not need java at all.

But behold! The "new"[0] OpenJDK for arm32 crossed milestone when it can be
widely used.

If you need java on your arm32 board, try to replace (or install alongside) your
java-1.8.0-openjdk 
special package java-1.8.0-openjdk-aarch32
The theoretical speedup[1] is aprox 100x faster. Practical speedup is somewhere between
10x-50x (for 
now). You can see it in koji:
http://koji.fedoraproject.org/koji/buildinfo?buildID=780150 - java build by
"normal" java on aarch32 
- 13 hours
http://koji.fedoraproject.org/koji/buildinfo?buildID=802986  - java build by
"new" java on aarch32 - 
2 hours

We have already slowly started to enable virtual java provides:
f24 - no
f25 - java
f26 - java+java-devel

Please *don't* change your specfiles (if any) to something like:

ifarch arm32
   BuildRequires java-1.8.0-openjdk-aarch32-devel
else
   BuildRequires java-1.8.0-openjdk-devel
fi

You will mess up things a lot. The provides will come with stability and  in longer run
the package 
will be merged back to java-1.8.0-openjdk packages (as it is still the same friendly
openjdk, just 
with different virtual machine)

hth
   J.

[0] http://koji.fedoraproject.org/koji/packageinfo?packageID=22627
[1] http://mail.openjdk.java.net/pipermail/aarch32-port-dev/2016-September/00...

[Fernando Cassia]

On Thu, Sep 22, 2016 at 7:43 AM, Jiri Vanek <jvanek(a)redhat.com&gt; wrote:

>  The luckier from you already tuned arm32 boards to not need java at
> all. 

I despise this message.

FC--
During times of Universal Deceit, telling the truth becomes a revolutionary
act
Durante épocas de Engaño Universal, decir la verdad se convierte en un Acto
Revolucionario
- George Orwell

[Jiri Vanek]

On 09/22/2016 04:33 PM, Fernando Cassia wrote:
>  I despise this message 
Why so?

  Sorry if it insulted you somehow. I'm myself using java on arm32 board. And it is
really painful. 
However I'm java developer, so it is only ... nature... what incline me to it.
Because of speed of java on arm32 I sincerely believe that all except java developers
really dont 
have java on arm32.

J.

[Roman]

В Чт, 22/09/2016 в 12:43 +0200, Jiri Vanek пишет:
>  Hello good people of Fedora!
>  
>  Most of you is probably facing very slow java (java-1.8.0-openjdk) on
>  any arm32 device.
>  The luckier from you already tuned arm32 boards to not need java at
>  all.
>  
>  But behold! The "new"[0] OpenJDK for arm32 crossed milestone when it
>  can be widely used.
>  
>  If you need java on your arm32 board, try to replace (or install
>  alongside) your java-1.8.0-openjdk 
>  special package java-1.8.0-openjdk-aarch32
>  The theoretical speedup[1] is aprox 100x faster. Practical speedup is 
100x speedup, and u think that there will be someone who use java on
arm? If serriously, i will try. ty

> somewhere between 10x-50x (for 
> now). You can see it in koji:
> http://koji.fedoraproject.org/koji/buildinfo?buildID=780150 - java
> build by "normal" java on aarch32 
> - 13 hours
> http://koji.fedoraproject.org/koji/buildinfo?buildID=802986  - java
> build by "new" java on aarch32 - 
> 2 hours
> 
> We have already slowly started to enable virtual java provides:
> f24 - no
> f25 - java
> f26 - java+java-devel
> 
> Please *don't* change your specfiles (if any) to something like:
> 
> ifarch arm32
>    BuildRequires java-1.8.0-openjdk-aarch32-devel
> else
>    BuildRequires java-1.8.0-openjdk-devel
> fi
> 
> You will mess up things a lot. The provides will come with stability
> and  in longer run the package 
> will be merged back to java-1.8.0-openjdk packages (as it is still
> the same friendly openjdk, just 
> with different virtual machine)
> 
> hth
>    J.
> 
> [0] http://koji.fedoraproject.org/koji/packageinfo?packageID=22627
> [1] http://mail.openjdk.java.net/pipermail/aarch32-port-dev/2016-Sept
> ember/000440.html
> _______________________________________________
> users mailing list -- users(a)lists.fedoraproject.org
> To unsubscribe send an email to users-leave(a)lists.fedoraproject.org

[Jiri Vanek]

On 09/23/2016 10:10 PM, Roman wrote:
>  В Чт, 22/09/2016 в 12:43 +0200, Jiri Vanek пишет:
> > Hello good people of Fedora!
> >
> > Most of you is probably facing very slow java (java-1.8.0-openjdk) on
> > any arm32 device.
> > The luckier from you already tuned arm32 boards to not need java at
> > all.
> >
> > But behold! The "new"[0] OpenJDK for arm32 crossed milestone when it
> > can be widely used.
> >
> > If you need java on your arm32 board, try to replace (or install
> > alongside) your java-1.8.0-openjdk
> > special package java-1.8.0-openjdk-aarch32
> > The theoretical speedup[1] is aprox 100x faster. Practical speedup is
>
>  100x speedup, and u think that there will be someone who use java on 
I do :)
>  arm? If serriously, i will try. ty 
If nothing else does, koji builders are. And java stack is build for arms.

If no other benefit then 1/10 waiting for arm32 koji builds, then it fulfilled its
purpose.

But I believe the package will have also human-target audience.

hth!
   J.
> > somewhere between 10x-50x (for
> > now). You can see it in koji:
> > http://koji.fedoraproject.org/koji/buildinfo?buildID=780150 - java
> > build by "normal" java on aarch32
> > - 13 hours
> > http://koji.fedoraproject.org/koji/buildinfo?buildID=802986  - java
> > build by "new" java on aarch32 -
> > 2 hours
> >
> > We have already slowly started to enable virtual java provides:
> > f24 - no
> > f25 - java
> > f26 - java+java-devel
> >
> > Please *don't* change your specfiles (if any) to something like:
> >
> > ifarch arm32
> >    BuildRequires java-1.8.0-openjdk-aarch32-devel
> > else
> >    BuildRequires java-1.8.0-openjdk-devel
> > fi
> >
> > You will mess up things a lot. The provides will come with stability
> > and  in longer run the package
> > will be merged back to java-1.8.0-openjdk packages (as it is still
> > the same friendly openjdk, just
> > with different virtual machine)
> >
> > hth
> >    J.
> >
> > [0] http://koji.fedoraproject.org/koji/packageinfo?packageID=22627
> > [1] http://mail.openjdk.java.net/pipermail/aarch32-port-dev/2016-Sept
> > ember/000440.html
> > _______________________________________________
> > users mailing list -- users(a)lists.fedoraproject.org
> > To unsubscribe send an email to users-leave(a)lists.fedoraproject.org
>  _______________________________________________
>  users mailing list -- users(a)lists.fedoraproject.org
>  To unsubscribe send an email to users-leave(a)lists.fedoraproject.org
>