make cluster thread number configable
-------------------------------------
Key: TS-822
URL: https://issues.apache.org/jira/browse/TS-822
Project: Traffic Server
Issue Type: Task
Components: Clustering
Affects Versions: 3.1.0
Environment: heavy clustering env
Reporter: Zhao Yongming
Assignee: Zhao Yongming
Priority: Minor
Fix For: 3.1.0
when my cluster working at a heavy load, the thread seems need more cpu time,
as the cluster thread number is hard coded to be just one. we should release it
or find out other solutions.
{code}
Tasks: 149 total, 1 running, 148 sleeping, 0 stopped, 0 zombie
Cpu0 : 13.2%us, 11.6%sy, 0.0%ni, 24.5%id, 34.1%wa, 0.0%hi, 16.6%si, 0.0%st
Cpu1 : 14.3%us, 9.6%sy, 0.0%ni, 55.5%id, 3.0%wa, 1.0%hi, 16.6%si, 0.0%st
Cpu2 : 15.4%us, 9.7%sy, 0.0%ni, 39.8%id, 19.1%wa, 1.3%hi, 14.7%si, 0.0%st
Cpu3 : 12.3%us, 9.0%sy, 0.0%ni, 57.0%id, 5.0%wa, 2.3%hi, 14.3%si, 0.0%st
Mem: 16427532k total, 13547884k used, 2879648k free, 289068k buffers
Swap: 2096472k total, 0k used, 2096472k free, 451684k cached
PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
28210 nobody 15 0 12.7g 12g 4508 S 55.9 77.0 731:00.78 [ET_CLUSTER 0]
28145 nobody 15 0 12.7g 12g 4508 S 8.0 77.0 104:39.41 [ET_NET 1]
28149 nobody 15 0 12.7g 12g 4508 S 7.7 77.0 108:31.92 [ET_NET 5]
28143 nobody 15 0 12.7g 12g 4508 S 7.3 77.0 110:25.50 [ET_NET 0]
28146 nobody 15 0 12.7g 12g 4508 S 7.3 77.0 107:19.08 [ET_NET 2]
28147 nobody 15 0 12.7g 12g 4508 S 7.3 77.0 107:04.85 [ET_NET 3]
28148 nobody 15 0 12.7g 12g 4508 S 7.0 77.0 105:01.84 [ET_NET 4]
28164 nobody 16 0 12.7g 12g 4508 S 4.7 77.0 0:26.85 [ET_AIO 3]
28188 nobody 15 0 12.7g 12g 4508 S 3.7 77.0 49:19.35 [ACCEPT]
28135 nobody 16 0 363m 15m 2068 S 1.0 0.1 6:49.62 traffic_manager
28132 nobody 15 0 363m 15m 2068 S 0.7 0.1 14:08.49 traffic_manager
28178 nobody 16 0 12.7g 12g 4508 S 0.7 77.0 4:42.76 [ET_AIO 1]
28156 nobody 16 0 12.7g 12g 4508 S 0.3 77.0 0:29.01 [ET_AIO 3]
28166 nobody 16 0 12.7g 12g 4508 S 0.3 77.0 0:26.50 [ET_AIO 5]
28173 nobody 16 0 12.7g 12g 4508 S 0.3 77.0 0:34.62 [ET_AIO 4]
28177 nobody 16 0 12.7g 12g 4508 S 0.3 77.0 4:42.74 [ET_AIO 0]
28180 nobody 16 0 12.7g 12g 4508 S 0.3 77.0 4:42.75 [ET_AIO 3]
28181 nobody 16 0 12.7g 12g 4508 S 0.3 77.0 4:40.95 [ET_AIO 4]
28183 nobody 16 0 12.7g 12g 4508 S 0.3 77.0 4:42.44 [ET_AIO 6]
1 root 15 0 10348 632 540 S 0.0 0.0 0:00.69 init
2 root RT -5 0 0 0 S 0.0 0.0 0:00.11 migration/0
3 root 34 19 0 0 0 S 0.0 0.0 0:04.68 ksoftirqd/0
4 root RT -5 0 0 0 S 0.0 0.0 0:00.00 watchdog/0
5 root RT -5 0 0 0 S 0.0 0.0 0:00.09 migration/1
6 root 34 19 0 0 0 S 0.0 0.0 0:06.99 ksoftirqd/1
7 root RT -5 0 0 0 S 0.0 0.0 0:00.00 watchdog/1
8 root RT -5 0 0 0 S 0.0 0.0 0:00.09 migration/2
{code}
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