epi
Description
Pi number calculation
Usage
$ erl -pa ebin/
Erlang R15B02 (erts-5.9.2) [source] [64-bit] [smp:4:4] [async-threads:0] [hipe] [kernel-poll:false]
Eshell V5.9.2 (abort with ^G)
1> application:start(epi).
ok
2> epi_master:pi(1000000000,10000).
10000 workers successfully spawned
3.14160173199999981364e+00
ok
3> epi_master:pi(10000000000,10000).
10000 workers successfully spawned
3.14160417320000018293e+00
ok
4> epi_master:pi(100000000,10).
10 workers successfully spawned
3.14151040000000003616e+00
ok
Notes
Mind the system limit for number of processes spawn. If not respected, it could lead to the following error,
Eshell V5.9.2 (abort with ^G)
1> application:start(epi).
ok
2> epi_master:pi(1000000000,100000).
=ERROR REPORT==== 22-Jan-2013::12:00:20 ===
Too many processes
=ERROR REPORT==== 22-Jan-2013::12:00:55 ===
** Generic server epi_master terminating
** Last message in was {pi,1000000000,100000}
** When Server state == {state,0,0}
** Reason for termination ==
** {system_limit,[{erlang,spawn_link,
[epi_worker,calculus,[10000,<0.38.0>]],
[]},
{epi_master,start_workers,3,
[{file,"src/epi_master.erl"},{line,79}]},
{epi_master,handle_call,3,
[{file,"src/epi_master.erl"},{line,48}]},
{gen_server,handle_msg,5,
[{file,"gen_server.erl"},{line,588}]},
{proc_lib,init_p_do_apply,3,
[{file,"proc_lib.erl"},{line,227}]}]}
By default, this is set to 32767.