java version "1.5.0_08"
Java(TM) 2 Runtime Environment, Standard Edition (build 1.5.0_08-b03)
Java HotSpot(TM) Client VM (build 1.5.0_08-b03, mixed mode)
On a redhat 9 machine, I can get a maximum of 612 threads in tomcat when
I start it with -Xmx1500M. Without a -Xmx param I get 3448 threads.
I have a connection to a mail server that was closed from the other end,
but my local jvm is still hanging on to the socket (for like 6 or 7 hours):
Proto Recv-Q Send-Q Local Address Foreign Address State
tcp1 11796 p5b.selectacast.n:45221 213.38.169.138:smtp
CLOSE_WAI
When I get this Exception, this is an operating system limit, not a jvm
limit, right?
java.io.FileNotFoundException:
/local/java/classes/com/xtenit/util/Misc$1.class (Too many open files)
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Hui Huang wrote:
Is this on Redhat 9? If so, try this:
+ find out java process id
+ use gdb to attach to the process (gdb - )
+ quit gdb
The problem just happened again and indeed that trick worked (strace
didn't, I think because it doesn't trace all threads, just the one it
connects to). I atta
Gerald Bauer wrote:
unfree.
On top of this, non-free core software is something
to be avoided in the community. This overly-controlled
approach on Sun's part is losing the Linux desktop to
.NET.
.NET is freerer than java?
--
To
Glenn Holmer wrote:
Gerald Bauer wrote:
Tom writes:
Sun invariably says that they can't think of what
problems open source Java would solve that aren't
already solved. Of course that's ridiculous.
Why?
It is
pretty hard for Linux vendors to ship a working JRE on
their platform if they make any
Glenn Holmer wrote:
Gerald Bauer wrote:
Tom writes:
Sun invariably says that they can't think of what
problems open source Java would solve that aren't
already solved. Of course that's ridiculous.
Why?
It is
pretty hard for Linux vendors to ship a working JRE on
their platform if they make any
Hui Huang wrote:
It looks like the same issue. IIRC, the problem happened when one
thread sleeps on pthread_cond_wait, and another thread in
pthread_cond_{signal,broadcast} to wake up the first thread,
sometimes kernel failed to change the first thread back to running.
So how can I encourage this c
Hui Huang wrote:
Veda N Ponnusamy wrote:
Hi,
We set the LD_ASSUME_KERNEL=2.2.5 and the hang goes away. But the
application
is running at 60% speed !!
Interesting. You could try LD_ASSUME_KERNEL=2.4.1 (the floating
stack version of LinuxThreads), it's generally faster than 2.2.5.
Do you know a
Hui Huang wrote:
Is this on Redhat 9? If so, try this:
+ find out java process id
+ use gdb to attach to the process (gdb - )
+ quit gdb
wait a few seconds, does the process start to run again? If yes,
it's a known RH-9 issue (a notification from pthread_cond_broadcast
is lost in NPTL). Update to A
Hui Huang wrote:
Is this on Redhat 9? If so, try this:
Yes.
+ find out java process id
+ use gdb to attach to the process (gdb - )
+ quit gdb
Well I killed the process already, but the problem seems to happen every
couple of weeks so I'll try that next time.
wait a few seconds, does the process s
MParser.(Unknown Source)
at org.apache.xerces.parsers.DOMParser.(Unknown Source)
Joseph Shraibman wrote:
Kinda looks like what happened to me. A lot of threads "waiting on
condition" for no reason at all. For example:
"Thread-206" prio=1 tid=0x087b7d18 nid=0x7b88 waiting on condition
[6e01e000..6e
Juergen Kreileder wrote:
Joseph Shraibman <[EMAIL PROTECTED]> writes:
http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=4813310
This has been fixable for a while now,
No, the article is wrong.
::sigh:: I hate it when that happens.
but no comments to indicate progress. Do no comments m
http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=4813310
This has been fixable for a while now, but no comments to indicate
progress. Do no comments mean no interest, or should we expect no news
until it is fixed, if ever?
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Gerald Bauer wrote:
Correct me if I'm wrong. The point of blackdown is
to create a free Java runtime alternative for the free
Linux operating system.
You are wrong. Blackdown is the project to port sun's jvm to platforms
that sun does not support. When it first started out sun didn't have a
l
f the JVM. I didn't try running this app on 1.5
jvm
Reg
Veda
-Original Message-
From: Joseph Shraibman [mailto:[EMAIL PROTECTED]
Sent: Friday, June 11, 2004 1:26 PM
To: Calvin Austin
Cc: Veda N Ponnusamy; [EMAIL PROTECTED]; [EMAIL PROTECTED]
Subject: Re: Help on JVM hang
Calvin Austi
Daniel Malmkvist wrote:
I have an application that should handle alot (>10 000) connection at
the same time but usally no traffic. Is the best way to make a thread
pool or is the best way to have 1 thread per connection. If no contex
switching will be done I don't see why not.
YOu will have a
Calvin Austin wrote:
Does it ever resume. 1.5beta2 has more diagnostics in it and you may be
able to even attached with jdb (hey tim :*)
Without seeing the other threads its difficult to see what is happening,
however there was a bug fix in 1.5 to stop the cache growing out of
control. A quick
I have. I reported it to sun and they said if they had a repoducable
test case they would open a bug. But I could never figure out how to
reproduce it.
Veda N Ponnusamy wrote:
Hi folks,
I'm posting this, since I know I can get help only from this
community. My application is a heavily mul
Jaume Obrador wrote:
What finally I want to do is to run a java process as a daemon and I
must be able to run it from /etc/init.d/
Inside the script just change to the proper directory (or set the
CLASSPATH variable). Changes to the environment made by a script are
lost when the script ends,
What version of top are you using? H works with the one I have:
# top -v
procps version 2.0.11
[EMAIL PROTECTED] wrote:
Thank you for your answer Vladimir,
The selectable columns with top are :
* A: PID= Process Id
* E: USER = User Name
* H: PR = Priority
* I: NI =
want to check your code (both Java and native) to see if
you are creating threads with small stack. Before 1.5, the minimum
stack size allowed is 96k.
regards,
-hui
Joseph Shraibman wrote:
That's what StackOverflowError is for. It shouldn't crash the jvm
Dan Kegel wrote:
Joseph Shraibma
I had a jvm running for a few hours when it suddenly quit with:
Fatal: Stack size too small. Use 'java -Xss' to increase default stack size.
WTF?
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Dan Kegel wrote:
Indeed. Actually, the best thing to do would be to submit
a patch that yields the behavior you want.
- Dan
Tried that last time, and they eventually fixed the problem but they didn't use my patch,
so I figured I'd save my time. The main problem with this one is that they don't
Christopher Smith wrote:
I think it's kind of pointless to send this in as a distribution bug. It
is something that you should report to the psutils, nptl and/or kernel
folks, rather than redhat. I'm sure that will in turn result in a debate
as to what is right or wrong, but that is not a decision
Dan Kegel wrote:
Sure it can. If an app has buttloads of threads, most of which have
never used much of their stack allocation, the total of the SZ column in ps
could indeed be lower than the total of the 'used' column in the
output of free. SZ can include address space for which neither
physical
https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=97586
Please post comments about how ps reporting the wrong size for multithreaded apps is
indeed a bug.
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which didn't really allocate memory dynamically.)
The vm still accepts this parameter, but does it still do something?
Yes, it still does something. It is useful to keep your jvm from running away and
consuming all the memory on the machine.
--
Joseph Shraibman
joseph(at)xtenit.com
Increase
Hui Huang wrote:
Still not convinced? Try creating more than 1024 threads, that's
something you couldn't do without NPTL.
There has been a lot of work done in the past to make this happen.
Drop me an email if you'd like to hear more about the boring story of
threading support within JVM ;-)
I do t
Kent E. wrote:
does it mean...
browsing thru a linux is not allowed while browsing thru a windows2000 can
view the page
which i stated below?
Maybe the windows jvm has broken security, letting it work when it shouldn't. I really
have no idea.
error messages.. do i have to set another
configuration file in linux?
thanks in advance...
kent
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Joseph Shraibman wrote:
What does Runtime.maxMemory() return exactly?
With further testing it appears to return exactly 64meg over the true limit.
Also when doing java -Xmx3m the real value used is actuall 4 megs, and it appears all odd
values are rounded up 1
What does Runtime.maxMemory() return exactly? I have this program:
public class MaxMemory{
private static String uft(){
Runtime rt = Runtime.getRuntime();
long free = rt.freeMemory(), total = rt.totalMemory(), used = total - free;
long max = rt.maxMemory();
j
Juergen Kreileder wrote:
[EMAIL PROTECTED] writes:
On Fri, 14 Feb 2003, Juergen Kreileder wrote:
BTW: If you use another setting than CONFIG_1GB
or if you're on x86-64
you want to use the new release. Older HotSpot versions have
problems with the other values.
So which ones are good? Is t
Dan Kegel wrote:
Joseph Shraibman wrote:
I never got anywhere near 1gb of memory usage.
Physical memory, maybe, but I bet you a nickel you got
up near 1GB of *virtual* memory. Go learn about how
thread stacks work. You're not running out of RAM; you're
running out of address
Dan Kegel wrote:
The -Xss100k helps because each thread stack immediately occupies
its full range of address space (discontiguous stacks not being supported).
If the OS defaults to a limit of 1GB address space for user processes,
at 100KB per stack, that's a hard limit of 10,000 threads.
I nev
I'm running:
java version "1.4.1_01"
Java(TM) 2 Runtime Environment, Standard Edition (build 1.4.1_01-b01)
Java HotSpot(TM) Client VM (build 1.4.1_01-b01, mixed mode)
... on redhat 8.0. I've discovered that I get get somewhere between 3600 and 3700 threads
in a jvm without any arguments. If I p
Hui Huang wrote:
Joseph Shraibman wrote:
Hui Huang wrote:
Joseph Shraibman wrote:
Alexander V. Konstantinou wrote:
Actually, thread priorities work fine in Linux.
No, they don't, not with the latest sun jdk on redhat 8.0.
Thread priority is just a hint (same appli
Hui Huang wrote:
Joseph Shraibman wrote:
Alexander V. Konstantinou wrote:
Actually, thread priorities work fine in Linux.
No, they don't, not with the latest sun jdk on redhat 8.0.
Thread priority is just a hint (same applies to Thread.yield()).
While the jvm authors can
Alexander V. Konstantinou wrote:
Actually, thread priorities work fine in Linux.
No, they don't, not with the latest sun jdk on redhat 8.0.
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Masnizar jamian wrote:
I'm new to linux , so are there any difference between windows platform
and linux in terms of coding (mainly in multithread)? Because I heard
that a linux thread is different from windows thread. Could you
recommend me any reading material that clear some cobweb in my br
The link for jad on http://www.blackdown.org/java-linux/products/javatools.html should be
http://www.geocities.com/zz_xu/jad.html (unless someone knows of a more recent site).
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system. On a rh 8.0 that used to be a
7.2 it is ISO-8859-1, and on a system that always was 8.0 it is UTF-8
Joseph Shraibman wrote:
I have code to create a Multipart like this:
MimeMultipart mm = new MimeMultipart("alternative");
BodyPart bp = new MimeBodyPart()
now looks like this:
--=_Part_21_20566889.1041555012620
Content-Type: text/html; charset=ANSI_X3.4-1968
Content-Transfer-Encoding: quoted-printable
This charset=ANSI_X3.4-1968 is causing problems when netscape reads the mail. It appears
that file.encoding changed between versions. Does anyone kn
According to http://www.blackdown.org/java-linux/java2-status/jdk1.4-status.html blackdown
1.4.1 has been in beta since July. What is holding up the release?
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http://developer.java.sun.com/developer/bugParade/bugs/4694590.html
I know it doesn't suffer from bug 4706607
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2002-11-04 at 17:15, Joseph Shraibman wrote:
I tried to run java 1.4.1 from sun on my rh 8.0 box and I spent a day trying to figure out
why rmi wouldn't work. I finally figured out that I had to uninstall libgcj (which was
needed by gettext, so I had to uninstall that too) and now everyt
I tried to run java 1.4.1 from sun on my rh 8.0 box and I spent a day trying to figure out
why rmi wouldn't work. I finally figured out that I had to uninstall libgcj (which was
needed by gettext, so I had to uninstall that too) and now everything works perfectly.
I'm just posting this to help a
OK figured out what xcu is, but where in there does it discuss #! ?
For the rest of you: http://www.unix-systems.org/version3/xcu_contents.html
Dan Kegel wrote:
> Joseph Shraibman wrote:
>
>>I have been having problems making beanshell shell scripts on linux.
>>
>>Bas
I found some mailing list archives from 2000 mentioning #! but it was a mess and
refered
to things the readers of that list knew about but I don't. For example I couldn't
figure
out what XCUd3 ERN 6 is.
Could you point me to something more specific?
Dan Kegel wrote:
> Jos
, so java doesn't get
two
arguments '-client' and 'bsh.Interpreter', it gets one '-client bsh.Interpreter'. Who
is
responsible for magic line interpretation, the shell that calls the script or the
kernel?
Where is the spec for magic lines?
--
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/native_threads/java
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Hi All,
So I'm having this problem that the logging system that I have used
successfully on other linux platforms is not working on
i386-redhat-linux-gnu.
The logging system is designed to store logging messages and then write
them to the log file in a low priority thread. However when I run the
ch I use for testing. I run jdk 1.3, Tomcat 3.2, MySQL on
Linux.
Any help would be greatly appreciated.
Thanks,
Joseph
ps : Anybody who'd like to have a look at my code, please indicate.
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If I create a shutdown hook, does it create an os-level thread that sits
around doing nothing until the java program exits?
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Juergen Kreileder wrote:
> On Wed, 27 Jun 2001, Alan Hawrelak wrote:
>
> > Sam Joseph wrote:
> >
> >> I can extract the blackdown version, and unpack it but when I try
> >> to run
> >>
> >> the java command I get this:
> >>
> &g
Follow up to my own mail - I got help from another list, the solution seems
to be:
>You need JDK that is compiled for s390(search google "s390 jdk"), for
> example:
>
http://www.ibiblio.org/pub/languages/java/blackdown.org/JDK-1.2.2/s390/FCS/?M=A
Sam Joseph wrote:
&g
Hi,
I've been trying to install a blackdown jdk on an IBM penguin box using
SuSE linux and have not had much luck so far.
I can extract the blackdown version, and unpack it but when I try to run
the java command I get this:
l008064:~/j2sdk1.3.0/bin # ./java -version
Error: can't find libjava.so
e","-password:joe","-initialprogram:C:\\Office\\Word\\winword.exe
C:\\docs\\1.doc"};
Runtime r = Runtime.getRuntime();
r.exec(cmd);
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pInit processes left around.
I'm currently running 1.2.2fcs from blackdown. These problems have
happened with 2.2.15 and 2.4.0 kernels.
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-
gt; way it likes.
May doesn't mean should. I imagine the spec was so loose because it
could be expected that fine control over the threading might not be
available to the implementors of the jvm on every platform, not because
the writers of the spec didn't think Thread.yield() would be
Is it just me or does Thread.yield() not work anymore with the 2.4.0
kernel?
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with a
Just open it like you would any other file.
Raphael Mack wrote:
>
> Hi,
>
> I want to write some data to my lp0-port. Does anyone know how I can do
> this?
>
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ormal. I don't know exactly what the jvm is doing when it is taking
all that time starting up so I don't know how useful this would be.
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lest application loads several times slower than its naive ecuivalent.
> I know about the kernel module that invokes JRE when you exec a java .class
> file(with appropriate +x permission). But it doesn't keep JVM is not resident.
>
>
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[EMAI
Scott Murray wrote:
>
> On Wed, 10 Jan 2001, Joseph Shraibman wrote:
>
> > On a related note, what is the difference between "buffered" and
> > "cached" memory? I've noticed that with 2.4.0 there is barely any
> > buffered.
>
> Nowada
e kernel, or
upgrade to a 2.4 kernel.
So can I assume a 2.4 kernel has no limits on threads?
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using Linux 2.4.0-test12-pre7
>glibc 2.2
>Pentium III UP
>
> --
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o use only jikes?
>
> Jacob Nikom
>
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everyone here,and good luck to everybody!
> | Enjoy it~~
> |
> |
> |
>
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Does this affect blackdown jdk's in any way?
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-BEGIN PGP SIGNED MESSAGE-
Sun Microsy
Anybody ideas?
> --
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> <[EMAIL PROTECTED]>
>
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adns.net
Addresses: 216.32.74.52, 216.32.74.53, 216.32.74.55, 216.32.74.50
216.32.74.51
Aliases: www.yahoo.com
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others. I thought it might be
the security manager but it turned out it wasn't.
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cision a while back that it wasn't going to be the jvm's
job any more to manage threads. Thus no more green threads.
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27;t been fixed. How can a bug this serious continue to not
be fixed? Does Sun not allow blackdown to fix this?
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i get the following message
:cannot find class java/lang/thread'
:could not create Java VM'
I have downloaded jre1.1.6, but do not know how
to set it's parameters so that Oracle installer would work.
Any advice ?
Joseph
a message that Java VM
not started. I have downloaded jre1.1.6, but do not know how to set it's
parameters so that Oracle installer would work.
Any advice ?
Joseph
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wi
Nathan Meyers wrote:
>
> Joseph Shraibman wrote:
>
> > Jeffrey I Condon/Cupertino/IBM wrote:
> > >
> > > A proposal for fixing the Java programming language's threading problems
> > > --
Jeffrey I Condon/Cupertino/IBM wrote:
>
> A proposal for fixing the Java programming language's threading problems
> -
> Allen Holub suggests that the Java programming language's threading model
> is possibly the weakest part
Barnet Wagman wrote:
> PS is there any browser that works under Linux that does a better job
> with
> applets?
>
Mozilla is supposed to use the java that is installed on the system and
in windows it works, but I haven't figured out how to get it to work in
Linux.
--
Bill Halchin wrote:
>
> Hello,
>
>1) Can the javac compler extract classes from .jar files if
> these files are in CLASS_PATH or must I "unjar"?
javac is like any other java program. If it is in the CLASSPATH (no
underscore) it can be found.
>
>2) I tried "jar -t xerce
I have a cron process that is run every hour. It usually works fine,
but sometimes I get messages like this:
/usr/local/jdk1.2.2/jre/bin/realpath: Can't reopen pipe to command
substitution
(fd 4): No child processes
/usr/local/jdk1.2.2/jre/bin/realpath: /i386/realpath: No such file or
directory
Uh, yeah, that's right. Sun's jdk says that it doesn't work on smp
kernels. You'll have to use the latest blackdown version. The rc4
version didn't work on smp kernels because the jit it shipped with
couldn't handle native threads, but supposedly the final release has
fixed those bugs. Release
Juergen Kreileder wrote:
>
> >>>>> "Joseph" == Joseph Shraibman <[EMAIL PROTECTED]> writes:
>
> Joseph> When trying to use activatables I get this error after I
> Joseph> switched to blackdown 1.2.2 FCS from RC4.
>
> Jose
When trying to use activatables I get this error after I switched to
blackdown 1.2.2 FCS from RC4.
Exception: java.rmi.activation.ActivateFailedException: failed to
activate object; nested exception is:
java.security.AccessControlException: access denied
(com.sun.rmi.rmid.ExecOptionPermi
And this is a big security problem? Access specifiers are meant to
protect programmers from doing stupid things, not protect security. Of
course if you hack the jvm you will be able to get access to a private
field. So just what is the security concern here?
Wolfgang Hoschek wrote:
>
> There
David Marshall wrote:
>
> Joseph Shraibman wrote:
>
> > > I've had similar experiences, though on a 2.2.12 kernel.
> > > I get the dumps when using either javacomp or sunwjit (Blackdown
> > > 1.2.2RC4) - maybe after minutes, maybe after hours.
> >
David Marshall wrote:
>
> Michael Thome wrote:
>
> > I've been unable to get blackdown native-thread VM implementation to
> >
> > work properly on my x86-based SMP machine. I'd be interested in
> > corresponding with anyone who's had better luck.
> >
> > Essentially the problem is that code lik
Matt Welsh wrote:
>
> Juergen Kreileder <[EMAIL PROTECTED]> writes:
> > > "Matt" == Matt Welsh <[EMAIL PROTECTED]> writes:
> >
> > Matt> Turns out this is not as easy as it could be -- because even
> > Matt> though you call system calls like read(), write(), and
> > Matt> fcntl()
http://developer.java.sun.com/developer/bugParade/bugs/4326346.html
Can someone check if this is fixed in jsdk 1.3? I can't download it for
some reason.
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David Blankley wrote:
>
> I went on an interview last week and was thrown this question:
>
> what is wrong/sub-optimal with the following code:
>
> public class someClass {
> /*
> * some methods, etc
> */
> public boolean myBool = false;
> }
>
> Of course, since booleans default to false,
Sez
Nathan Meyers wrote:
>
> On Mon, Jun 05, 2000 at 10:49:35AM -0700, Nelson Minar wrote:
> > What would be *really* great is if there were an open source Java
> > implementation that we could all contribute to and avoid all these
> > politics. My impression is the Java design is stable enough that
Well unless it is put up on the ports page nobody will know about it.
Uncle George <[EMAIL PROTECTED]> wrote:
I have done a linux/java 1.2 port to alpha
/gat
Jo Uthus wrote:
> Ilya wrote:
>
> | Is there any work being done on porting JDK 1.2 to Linux on Alpha?
>
> I recently attended a seminar
I started an application with java -Xmx1024M classname and at about 60megs
I got an OutOfMemoryError. I tried it again with java -Xmx1073741824
classname and it works.
Verstion is 1.2.2 rc4
Get your own FREE, personal Netscap
Juergen Kreileder <[EMAIL PROTECTED]> wrote:
Jurergen> Don't use thread priorities for synchronization!
I'm not. I have an rmi server that needs to do a lot of work. I want to spin
off some time insensitve tasks into their own low priority thread so that rmi
calls that need fast responses won'
Run the following with green threads and you get only H's. Run it with native
threads and you get H's mixed with L's
/**
* threadtest.java
*
*
* Created: Mon May 1 15:35:45 2000
*
* @author Joseph Shraibman
* @version 1.0
*/
public class threadtest {
pu
Try using a differnt jit like tya.
Ekkehard Kraemer wrote:
> Hello,
>
> the problem which was discussed a while ago on this list is still persistent
> with RC4: any program that creates lots (say, 30) of small objects (like
> java.math.BigInteger) will eventually segfault.
>
> Just to make s
I did a while ago with tya 1.5 and was surprised to see sunwjit beat it.
But tya doesn't crash the vm in certain circumstances that sunwjit crashes.
I keep meaning to run the benchmarks again with all the updated versions of
everything but I've been busy. I'll let everyone know when I get around
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