help: find CPU,memeory parameters from java programs

Thread view:

pira - 18 Jun 2005 08:47 GMT

Hi,
I'd like to know if it is possible to collect information about the use of
the CPU,
the use of the memory and other parameters of the PC from a java program.
I've heard about JVMPI-JVMTI, but it would make me write code in C/C++.
Does it exist a strategy in java?
Thanks!

Reply to this Message

Simon OUALID - 18 Jun 2005 10:52 GMT

> Hi,
> I'd like to know if it is possible to collect information about the use of
[quoted text clipped - 3 lines]
> Does it exist a strategy in java?
> Thanks!

Runtime.getRuntime().freeMemory();
Runtime.getRuntime().totalMemory();
Runtime.getRuntime().maxMemory();
Runtime.getRuntime().availableProcessors();

http://java.sun.com/j2se/1.5.0/docs/api/java/lang/Runtime.html#freeMemory()

But it will only give you stats informations the JVM's memory (heap size).

Reply to this Message

wazary - 19 Jun 2005 15:20 GMT

> Runtime.getRuntime().freeMemory();
> Runtime.getRuntime().totalMemory();
> Runtime.getRuntime().maxMemory();
> Runtime.getRuntime().availableProcessors();

I know these methods, but they can't tell me
any information about the CPU in term of
charge, business, etc.

Reply to this Message

Andrew Thompson - 19 Jun 2005 15:32 GMT

>> Runtime.getRuntime().freeMemory();
>> Runtime.getRuntime().totalMemory();
[quoted text clipped - 4 lines]
> any information about the CPU in term of
> charge,

Charge?

>..business,

Business?? What the heck are you on about?

Do you mean - 'CPU chip takes +5 Volts and is made by AMD'?

Signature

Andrew Thompson
http://www.PhySci.org/codes/ Web & IT Help
http://www.PhySci.org/ Open-source software suite
http://www.1point1C.org/ Science & Technology
http://www.LensEscapes.com/ Images that escape the mundane

Reply to this Message

Ingo R. Homann - 20 Jun 2005 08:07 GMT

Hi pira,

> Hi,
> I'd like to know if it is possible to collect information about the use of
[quoted text clipped - 3 lines]
> Does it exist a strategy in java?
> Thanks!

Using Java5, take a look at the java.lang.management-package. The
ThreadMBean provides some information on CPU usage, IIRC. There are some
ohter interesting classes, although I didn't work with them...

Hth,
Ingo

Reply to this Message

help: find CPU,memeory parameters from java programs

Free Magazines