100% CPU in IcedTea plugin

[Stefan Reich]

> custom build head?

That sounds... complicated. Is it compiling, linking and stuff?

I'm more in favor of single-click installations :o)

I'll try to do the stackdump, I think that'll help us all find the reason.

Thanks for the answer!
Stefan


On Thu, Jan 9, 2014 at 9:15 AM, Jiri Vanek <jvanek at redhat.com> wrote:

> On 01/09/2014 02:12 AM, Stefan Reich wrote:
>
>> Hi!
>>
>> I am seeing 100% CPU usage by the Java process when I use the IcedTea
>> plugin + OpenJDK 7 in Firefox
>> 22 on Peppermint Linux.
>>
>> It's not every time. Mostly after I load a few applets, it begins.
>> Applets don't work and CPU usage
>> of Java process = 100%.
>>
>> I also saw this with Java 6 I think. Definitely it's Java 7 now:
>>
>> ~ $ dpkg -l|grep iced
>> ii  icedtea-7-jre-jamvm                  7u25-2.3.10-1ubuntu0.12.04.2
>>          Alternative JVM
>> for OpenJDK, using JamVM
>> ii  icedtea-7-plugin                     1.2.3-0ubuntu0.12.04.3
>>          web browser
>> plugin based on OpenJDK and IcedTea to execute Java applets
>> ii  icedtea-netx                         1.2.3-0ubuntu0.12.04.3
>>          NetX -
>> implementation of the Java Network Launching Protocol (JNLP)
>> ii  icedtea-netx-common                  1.2.3-0ubuntu0.12.04.3
>>          NetX -
>> implementation of the Java Network Launching Protocol (JNLP)
>>
>> What to do...? Any way to find out what the Java process is doing?
>>
>> I'll try kill -3 to get a stack dump next time the bug is seen. Hope it
>> goes somewhere I can see it.
>>
>> Note: Sometimes the CPU load seems to go away again by itself, remember
>> seeing that once.
>>
>> Weird, eh?
>>
>> Here's an example applet btw: http://tinybrain.de:8080/tb/
>> gui-applet.php?id=105
>>
>> Any ideas?
>>
>
>
> Not much to guess I'm afraid :( Do you mind to try with custom build head?
> I have tried the exampel link you posted today, and java for very short
> tiime jumped to 42% but rest of time it dropped to vlaues 5% and moreover
> less..
>
>
> J.
>
>
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