Public bug reported:

The bug will happen when 2000 routers are created by rally script.

rally script:
"NeutronNetworks.create_N_routers_M_network_M_subnet": [
        {
            "args": {
                "num_of_routers":1,
                "num_of_networks":1,
                "network_create_args": {},
                "subnet_create_args": {},
                "subnet_cidr_start": "2.1.3.0/24",
                "subnets_per_network": 1,
                "router_create_args": {
                   "external_gateway_info": {
                    "network_id":"65a81c28-6ea3-47be-9e4d-ca34fc0b0844"
                    }
                }
            },
            "runner": {
                "type": "constant",
                "times": 1,
                "concurrency": 1
            },
            "context": {
                "users": {
                    "tenants": 1,
                    "users_per_tenant": 1
                },
                "quotas": {
                    "neutron": {
                        "network": -1,
                        "subnet": -1,
                        "router": -1
                    }
                }
            }
        }
    ]
environment´╝Üopenstack K 
             api-workers = 24

phenomenon:
PID USER      PR  NI    VIRT    RES    SHR S  %CPU %MEM     TIME+ COMMAND       
                                                                                
                                       
28582 neutron   20   0 1972384 1.513g   2112 R 100.0  2.4 690:03.53 
neutron-server                                                                  
                                                     
28587 neutron   20   0 2042504 1.582g   2108 R 100.0  2.5 753:38.91 
neutron-server                                                                  
                                                     
28579 neutron   20   0 2405900 1.919g   2108 R 100.0  3.1 714:32.32 
neutron-server                                                                  
                                                     
28581 neutron   20   0 2833136 2.326g   2108 R 100.0  3.7 723:43.28 
neutron-server                                                                  
                                                     
28586 neutron   20   0 1969648 1.509g   2108 R 100.0  2.4 679:06.97 
neutron-server                                                                  
                                                     
28588 neutron   20   0 2097372 1.626g   2108 R 100.0  2.6 735:03.23 
neutron-server                                                                  
                                                     
28589 neutron   20   0 2054628 1.593g   2108 R 100.0  2.5 711:27.87 
neutron-server                                                                  
                                                     
31289 neutron   20   0  346980  51872   5300 S   9.9  0.1 295:11.30 
neutron-zenic-a                                                                 
                                                     
 1842 root      20   0  911552  10188   1700 S   8.9  0.0   3249:10 tecs-tc-main

** Affects: neutron
     Importance: Undecided
         Status: New

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https://bugs.launchpad.net/bugs/1633998

Title:
  serveral neutron server process CPU punching height

Status in neutron:
  New

Bug description:
  The bug will happen when 2000 routers are created by rally script.

  rally script:
  "NeutronNetworks.create_N_routers_M_network_M_subnet": [
          {
              "args": {
                  "num_of_routers":1,
                  "num_of_networks":1,
                  "network_create_args": {},
                  "subnet_create_args": {},
                  "subnet_cidr_start": "2.1.3.0/24",
                  "subnets_per_network": 1,
                  "router_create_args": {
                     "external_gateway_info": {
                      "network_id":"65a81c28-6ea3-47be-9e4d-ca34fc0b0844"
                      }
                  }
              },
              "runner": {
                  "type": "constant",
                  "times": 1,
                  "concurrency": 1
              },
              "context": {
                  "users": {
                      "tenants": 1,
                      "users_per_tenant": 1
                  },
                  "quotas": {
                      "neutron": {
                          "network": -1,
                          "subnet": -1,
                          "router": -1
                      }
                  }
              }
          }
      ]
  environment´╝Üopenstack K 
               api-workers = 24

  phenomenon:
  PID USER      PR  NI    VIRT    RES    SHR S  %CPU %MEM     TIME+ COMMAND     
                                                                                
                                         
  28582 neutron   20   0 1972384 1.513g   2112 R 100.0  2.4 690:03.53 
neutron-server                                                                  
                                                     
  28587 neutron   20   0 2042504 1.582g   2108 R 100.0  2.5 753:38.91 
neutron-server                                                                  
                                                     
  28579 neutron   20   0 2405900 1.919g   2108 R 100.0  3.1 714:32.32 
neutron-server                                                                  
                                                     
  28581 neutron   20   0 2833136 2.326g   2108 R 100.0  3.7 723:43.28 
neutron-server                                                                  
                                                     
  28586 neutron   20   0 1969648 1.509g   2108 R 100.0  2.4 679:06.97 
neutron-server                                                                  
                                                     
  28588 neutron   20   0 2097372 1.626g   2108 R 100.0  2.6 735:03.23 
neutron-server                                                                  
                                                     
  28589 neutron   20   0 2054628 1.593g   2108 R 100.0  2.5 711:27.87 
neutron-server                                                                  
                                                     
  31289 neutron   20   0  346980  51872   5300 S   9.9  0.1 295:11.30 
neutron-zenic-a                                                                 
                                                     
   1842 root      20   0  911552  10188   1700 S   8.9  0.0   3249:10 
tecs-tc-main

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