# Copyright 2021 Max Planck Institute for Software Systems, and
# National University of Singapore
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"""
This script is for reproducing Simbricks line in [Figure 1] DCTCP result.
 
We used following combination of simulators.
HOST: Gem5 timing CPU
NIC: Intel i40e behavioral model
NET: ns-3 dumbbell model

The simulation composed of two pairs of iperf server and client, connected 
in a dumbbell topology.
The link between two switches is the bottleneck link.

 [HOST_0]-[NIC_0]-----[SWITCH]---[SWITCH]-----[NIC_1]-[HOST_1]
  server_0                |        |                client_0
                          |        |
 [HOST_0]-[NIC_0]----------        ---------- [NIC_1]-[HOST_1]
   server_1                                          client_1

The command to run all the experiments is:
$: python3 run.py pyexps/ae/f1_dctcp.py --filter gt-ib-* --force --verbose
"""

import simbricks.experiments as exp
import simbricks.simulators as sim
import simbricks.nodeconfig as node
from simbricks.simulator_utils import create_dctcp_hosts

types_of_host = ['gt']
types_of_nic = ['ib']
types_of_net = ['dumbbell']
types_of_app = ['DCTCPm']
types_of_mtu = [4000]

num_pairs = 2
max_k = 199680
k_step = 16640
link_rate_opt = '--LinkRate=10Gb/s ' # don't forget space at the end
link_latency_opt = '--LinkLatency=500ns '
cpu_freq = '5GHz'
cpu_freq_qemu = '2GHz'
sys_clock = '1GHz' # if not set, default 1GHz

ip_start = '192.168.64.1'

experiments = []

# set network sim
net_class = sim.NS3DumbbellNet

for mtu in types_of_mtu:
    for h in types_of_host:
        for c in types_of_nic:
            for k_val in range(0, max_k + 1, k_step):

                net = net_class()
                net.opt = link_rate_opt + link_latency_opt + f'--EcnTh={k_val}'

                e = exp.Experiment( h + '-' + c + '-' + 'dumbbell' + '-' + 'DCTCPm' + f'{k_val}' + f'-{mtu}')
                e.add_network(net)

                freq = cpu_freq
                # host
                if h == 'qemu':
                    host_class = sim.QemuHost
                elif h == 'qt':
                    freq = cpu_freq_qemu
                    def qemu_timing():
                        h = sim.QemuHost()
                        h.sync = True
                        return h
                    host_class = qemu_timing
                elif h == 'gt':
                    def gem5_timing():
                        h = sim.Gem5Host()
                        #h.sys_clock = sys_clock
                        return h
                    host_class = gem5_timing
                    e.checkpoint = True
                elif h == 'gO3':
                    def gem5_o3():
                        h = sim.Gem5Host()
                        h.cpu_type = 'DerivO3CPU' 
                        h.sys_clock = sys_clock
                        return h
                    host_class = gem5_o3    
                    e.checkpoint = True
                else:
                    raise NameError(h)

                # nic
                if c == 'ib':
                    nic_class = sim.I40eNIC
                    nc_class = node.I40eDCTCPNode
                elif c == 'cb':
                    nic_class = sim.CorundumBMNIC
                    nc_class = node.CorundumDCTCPNode
                elif c == 'cv':
                    nic_class = sim.CorundumVerilatorNIC
                    nc_class = node.CorundumDCTCPNode
                else:
                    raise NameError(c)


                servers = create_dctcp_hosts(e, num_pairs, 'server', net, nic_class, host_class, 
                                                nc_class, node.DctcpServer, freq, mtu)
                clients = create_dctcp_hosts(e, num_pairs, 'client', net, nic_class, host_class, 
                                                nc_class, node.DctcpClient, freq, mtu, ip_start=num_pairs+1)

            
                i = 0
                for cl in clients:
                    cl.node_config.app.server_ip = servers[i].node_config.ip
                    i += 1
                
                # All the clients will not poweroff after finishing iperf test except the last one
                # This is to prevent the simulation gets stuck when one of host exits.

                # The last client waits for the output printed in other hosts, then cleanup
                clients[num_pairs-1].node_config.app.is_last = True
                clients[num_pairs-1].wait = True

                print(e.name)
                experiments.append(e)

