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| From | Nigel Wade <nmw@ion.le.ac.uk> |
| Newsgroups | comp.lang.java.programmer |
| Subject | Re: java thread question |
| Date | Thu, 03 Apr 2014 16:17:34 +0100 |
| Lines | 15 |
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On 03/04/14 15:51, mcheung63@gmail.com wrote: > Hi All > I have write a little program to keep running some threads, i got questions: > 1) All threads are running within one process (ps command show me this), but it will eat up all cpu cores, how to explain this? Because the OS can normally schedule any runnable process/thread to run on any available CPU core. If your process has sufficient threads which are runnable then every core will be used. One of the main purposes of threads is that they offer concurrent execution. > 2) If thread will eat multiple cpu core, why wee need fork/join in java? Fork starts another process, and this may run an entirely different executable. If your only goal is to consume CPU then you don't require fork.
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java thread question mcheung63@gmail.com - 2014-04-03 07:51 -0700
Re: java thread question Nigel Wade <nmw@ion.le.ac.uk> - 2014-04-03 16:17 +0100
Re: java thread question Eric Sosman <esosman@comcast-dot-net.invalid> - 2014-04-03 11:43 -0400
Re: java thread question mcheung63@gmail.com - 2014-04-03 15:10 -0700
Re: java thread question Eric Sosman <esosman@comcast-dot-net.invalid> - 2014-04-03 19:00 -0400
Re: java thread question mcheung63@gmail.com - 2014-04-04 09:29 -0700
Re: java thread question Roedy Green <see_website@mindprod.com.invalid> - 2014-04-03 17:52 -0700
Re: java thread question mcheung63@gmail.com - 2014-04-04 09:31 -0700
Re: java thread question Roedy Green <see_website@mindprod.com.invalid> - 2014-04-04 09:49 -0700
Re: java thread question mcheung63@gmail.com - 2014-04-05 09:41 -0700
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