On 10/07/14 03:13, Rogério Brito wrote:
Hi there.
I would like to run some programs that require a JVM on "alternative"
platforms, like armel/powerpc (these are arches for which I have hardware
running Debian, but others might also be of interest). (Please, feel
free
to cross-post this message to other ports, if you deem this to be
relevant.)
But anything related to Java is too slow on such architectures with the
default, unoptimized Zero JVM and I'm having some problems while
trying to
use other JVM implementations that we have in the archive.
Based on this information, is there anybody out there that can help with
investigation of what works and what doesn't? I would love it if people
could perform a simple test by installing the packages scala and
clojure1.4?
* Running clojure and typing "(+ 1 1)" (without the quotes) should
give you
back the answer 2.
* Running scala and typing "1 + 1" (again, without quotes) should also
give
you back the answer 2.
For each of these cases, does it get faster if you type it again (in
which
case the JVM might be caching things)?
On a Cubieboard (Arm 7, single core, hard float, 1GHz, 1Gb RAM, Debian
Wheezy)
Default JVM is OpenJDK Zero VM, Java 1.6.0_31
In clojure it took abut 10 seconds to startup. The first time I did the
math operation it took about a second, after that it appeared to be
instant.
In scala, startup took about 6 seconds. The first math operation took 30
seconds. After that less than a second, but slower than clojure
After that, can you install alternative JVMs? The packages are:
* jvm-7-avian-jre (for the Avian JVM)
* icedtea-7-jre-jamvm (for JamVM).
To make each be use by default, simply reorder the lines in
/etc/java-7-openjdk/jvm-<your-arch-here>.cfg
In particular, does running with avian even work? All I got was an
illegal
instruction. It is supposed to be a fast and memory efficient JVM and
would
be a great thing to get running on arches where you can't upgrade your
memory as easily as with amd64 or i386.
avian-jre does not appear to be available for my device.
With icedtea-7-jre-jamvm
In clojure it took abut 25 seconds to startup. The first time I did the
math operation it took about two seconds, after that it appeared to be
instant.
In scala, startup took about 4 seconds. The first math operation took 50
seconds. After that about 5 seconds.
None of the tests crashed, reported warnings, or returned incorrect
results.
--
David Pottage
