学步园

The BIF statistics(run_queue) is used for estimating future loads. It returns the length of the queue of ready to run processes in the Erlang runtime system.

1.先在$HOME目录建立.hosts.erlang文件，内容如下<br /> ST36:~ # cat .hosts.erlang<br /> 'ST36'.<br /> 'ST37'.<br /> 2.<br /> ST36:~/test/QQTalk # erl -rsh ssh -sname master<br /> Erlang R14A (erts-5.8) [source] [smp:4:4] [rq:4] [async-threads:0] [hipe] [kernel-poll:false]</p> <p>Eshell V5.8 (abort with ^G)<br /> (master@ST36)1> pool:start(test).<br /> [test@ST36,test@ST37]<br /> (master@ST36)2> pool:attach('haha@ST37').<br /> attached<br /> (master@ST36)3> pool:get_nodes().<br /> [haha@ST37,test@ST36,test@ST37,master@ST36]<br /> (master@ST36)4> pool:get_node().<br /> haha@ST37<br /> (master@ST36)5> pool:get_node().<br /> test@ST36<br /> (master@ST36)6> pool:pspawn(io,format,["hello"]).<br /> <6605.46.0><br /> hello(master@ST36)7> pool:pspawn(io,format,["hello"]).<br /> hello<0.75.0><br /> (master@ST36)8> pool:pspawn(io,format,["hello"]).<br /> hello<6648.54.0><br /> (master@ST36)9> pool:pspawn(io,format,["hello"]).<br /> <6566.48.0><br /> hello(master@ST36)10> pool:pspawn(io,format,["hello"]).<br /> hello<6605.47.0><br /> (master@ST36)11> pool:pspawn(io,format,["hello"]).<br /> hello<0.80.0><br /> (master@ST36)12><br />