I've compiled and ran it, but what are the parameters?

./minerd
[2014-02-05 21:37:17] Binding thread 0 to cpu 0
[2014-02-05 21:37:17] Binding thread 2 to cpu 2ilable, in seconds (default: 5)
[2014-02-05 21:37:17] Binding thread 4 to cpu 4support
[2014-02-05 21:37:17] Binding thread 6 to cpu 6rt
[2014-02-05 21:37:17] Binding thread 7 to cpu 7
[2014-02-05 21:37:17] Binding thread 3 to cpu 3
[2014-02-05 21:37:17] HTTP request failed: Failed connect to 127.0.0.1:8669; Connection refused
[2014-02-05 21:37:17] Binding thread 5 to cpu 5l-level activities
[2014-02-05 21:37:17] Binding thread 1 to cpu 1ut messages
[2014-02-05 21:37:17] 8 miner threads started, using 'scrypt' algorithm.
[2014-02-05 21:37:17] json_rpc_call failed, retry after 30 seconds
[2014-02-05 21:37:47] HTTP request failed: Failed connect to 127.0.0.1:8669; Connection refused
[2014-02-05 21:37:47] json_rpc_call failed, retry after 30 seconds