bbtest yellow - PING test results sent unacceptably high

bbtest has been yellow for the last week. I'm wondering if anyone
has an idea what might be causing this? I'm using hobbitping. I've tried bumping concurrency up with no
luck... but given that the increase in time is in "PING test results
sent", I'm not sure that's the right move.

Error output: Timeout waiting for data from child, killing it Timeout waiting for data from child, killing it Child process terminated with signal 15 Timeout waiting for data from child, killing it Timeout waiting for data from child, killing it Child process terminated with signal 15 Timeout waiting for data from child, killing it Timeout waiting for data from child, killing it Child process terminated with signal 15

TIME SPENT Event Starttime
Duration bbtest-net startup
1227628387.017852 - Service definitions loaded 1227628387.018981
0.001129 Tests loaded 1227628387.053238
0.034257 DNS lookups completed 1227628387.055291
0.002053 Test engine setup completed 1227628387.067797
0.012506 TCP tests completed 1227628397.998092
10.930295 PING test completed (1628 hosts) 1227628439.127806
41.129714 PING test results sent 1227628538.148170
99.020364 Test result collection completed 1227628538.148205
0.000035 LDAP test engine setup completed 1227628538.148205
0.000000 LDAP tests executed 1227628538.148206
0.000001 LDAP tests result collection completed 1227628538.148207
0.000001 Test results transmitted 1227628538.209262
0.061055 bbtest-net completed 1227628538.214518
0.005256 TIME TOTAL
151.196666

Last week: TIME SPENT Event Starttime
Duration bbtest-net startup
1226941570.282399 - Service definitions loaded 1226941570.286460
0.004061 Tests loaded 1226941570.323923
0.037463 DNS lookups completed 1226941570.324033
0.000110 Test engine setup completed 1226941570.633056
0.309023 TCP tests completed 1226941580.999136
10.366080 PING test completed (1648 hosts) 1226941625.138740
44.139604 PING test results sent 1226941634.162412
9.023672 Test result collection completed 1226941634.162446
0.000034 LDAP test engine setup completed 1226941634.162447
0.000001 LDAP tests executed 1226941634.162447
0.000000 LDAP tests result collection completed 1226941634.162448
0.000001 Test results transmitted 1226941634.212176
0.049728 bbtest-net completed 1226941634.213048
0.000872 TIME TOTAL
63.930649 Thanks John