Michael Meyer wrote:
Hi,
I have a project that uses javac and a bit latex2html.
Ant version is 1.7.0. The javac is from the original
Sun JDK 6 Upodate 4. The OS is Ubuntu Linux.
When ant invokes the javac compiler the compilation
lasts longer on two cores than on one core (maxcpus=1
at the grub prompt).
This is strange:
I thought javac is not threaded? But top shows a java
process with up to 200% cpu usage on my dual core
machine.
I tried to limit it with cpulimit -e java -l 100, but
the cpu usage still rises above 100%.
Does anybody know how I could get the faster compile
times that I get with only one core activated - but
without deactivating the second core?
this is really interesting. I'd thought javac was unthreaded too, but
even so you'd expect file IO to work in the other CPU, so get a boost
from the second core.
what happens when you try a different javac, like the eclipse one?
--
Steve Loughran http://www.1060.org/blogxter/publish/5
Author: Ant in Action http://antbook.org/
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