# Establish N PFCP sessions for tunend, and emit massive GTP traffic to the UPF
# to each established tunnel.
#
# osmo-upf-load-gen               UPF                          "internet host"
#  |GTP-ep -------GTP-----> GTP-ep|UE-IP-addr -------IP------> arbitrary-IP|
#  |10.0.1.1              10.0.2.1|192.168.10.23              123.234.42.23|
#  |10.0.1.2
#                          ^                 ^                   ^
#    ^                     |                 |                   |
#    |                     |                configure by      configure by
#   configure by        from UPF            'ue ip'           'payload target ip',
#   'gtp ip'            ("F-TEID=choose")                     'payload target port'

# Configure CPU related settings:
cpu-sched
 !policy rr 18
 ! All Rx in hyperthreads within same cores:
 ! core-id=0, processor=0:
 cpu-affinity GtpFloodTx0 0x0001 delay
 ! core-id=0, processor=6:
 cpu-affinity GtpFloodTx1 0x0040 delay
 ! core-id=1, processor=1:
 cpu-affinity GtpFloodTx2 0x0002 delay
 ! core-id=1, processor=7:
 cpu-affinity GtpFloodTx3 0x0080 delay
 ! core-id=2, processor=2:
 cpu-affinity GtpFloodTx4 0x0004 delay
 ! core-id=2, processor=8: SPARE
 !cpu-affinity GtpFloodTx5 0x0100 delay
 ! core-id=3, processor=3:
 cpu-affinity GtpFloodRx0 0x0008 delay
 ! core-id=3, processor=9:
 cpu-affinity GtpFloodRx1 0x0200 delay
 ! core-id=4, processor=4:
 cpu-affinity GtpFloodRx2 0x0010 delay
 ! core-id=4, processor=10:
 cpu-affinity GtpFloodRx3 0x0400 delay
 ! core-id=5, processor=5:
 cpu-affinity GtpFloodRx4 0x0020 delay
 ! core-id=2, processor=11: SPARE
 !cpu-affinity GtpFloodRx5 0x0800 delay


# Configure one or more local GTP endpoints to emit GTP packets from.
# Established sessions will use these round-robin.
# These need to be local IP addresses for 'gtp flood' to work.
gtp local 172.16.31.100
gtp local 172.16.31.101
gtp local 172.16.31.102
gtp local 172.16.31.103
gtp local 172.16.31.104
gtp local 172.16.31.105
gtp local 172.16.31.106
gtp local 172.16.31.107
gtp local 172.16.31.108
gtp local 172.16.31.109
gtp local 172.16.31.110
gtp local 172.16.31.111
gtp local 172.16.31.112
gtp local 172.16.31.113
gtp local 172.16.31.114
gtp local 172.16.31.115
gtp local 172.16.31.116
gtp local 172.16.31.117
gtp local 172.16.31.118
gtp local 172.16.31.119
gtp local 172.16.31.120
gtp local 172.16.31.121
gtp local 172.16.31.122
gtp local 172.16.31.123
gtp local 172.16.31.124
gtp local 172.16.31.125
gtp local 172.16.31.126
gtp local 172.16.31.127
gtp local 172.16.31.128
gtp local 172.16.31.129
gtp local 172.16.31.130
gtp local 172.16.31.131
gtp local 172.16.31.132
gtp local 172.16.31.133
gtp local 172.16.31.134
gtp local 172.16.31.135
gtp local 172.16.31.136
gtp local 172.16.31.137
gtp local 172.16.31.138
gtp local 172.16.31.139
gtp local 172.16.31.140
gtp local 172.16.31.141
gtp local 172.16.31.142
gtp local 172.16.31.143
gtp local 172.16.31.144
gtp local 172.16.31.145
gtp local 172.16.31.146
gtp local 172.16.31.147
gtp local 172.16.31.148
gtp local 172.16.31.149
gtp local 172.16.31.150

gtp core 172.16.32.2

# use UE IP addresses from this range, +1 for each new UE:
# 192.168.0.1, 192.168.0.2, ...
ue ip range 192.168.1.2 192.168.254.254

# now associate with UPF and start N sessions.
pfcp-peer 172.16.31.2
 tx assoc-setup-req
 sleep 1
 date

 n 50000 session create tunend
 wait responses
 # All sessions established
 date

# For each established PFCP session, emit GTP packets
gtp flood
 rx-workers 5
 tx-workers 5
 io-uring queue-size 4000
 flows-per-session 1
 packets-per-flow infinite

 # configure the generated GTP payload: send UDP packets from the UE address
 # and these source UDP ports to these target addresses and target UDP ports.
 # They are used round-robin.
 # Source IP is the UE IP address.
 payload source port udp range 10000 10010
 payload target ip range 172.16.32.200 172.16.32.223
 payload target port udp range 23000 23000

date
# All GTP is flowing.
# osmo-upf-load-gen will keep this up for as long as there still are active GTP flows,
# or until receiving a signal interrupt (ctrl-C).

# give some time to gather counters before the tunnel is removed
sleep 1