Rate Limiting in MoonGen Simple vs Example Scripts

[AqsaKashaf]

Hi,

When I run moon-gen simple, I can successfully set a rate limit. However, when I use the scripts in sxample folder, it gives me the warning
[WARN] Per-queue rate limit is not supported on this device, setting per-device rate limit to 1 Mbit/s instead (note: this may fail as well if the NIC doesn't support any rate limiting).

and does not set the rate. If the problem was my NIC, then moongen-simple should also not set the rate.

`sudo ./build/MoonGen examples/l3-tcp-syn-flood.lua 0 -r 10
[INFO] Initializing DPDK. This will take a few seconds...
EAL: Detected 32 lcore(s)
EAL: No free hugepages reported in hugepages-1048576kB
EAL: Probing VFIO support...
EAL: PCI device 0000:04:00.0 on NUMA socket 0
EAL: probe driver: 8086:1521 net_e1000_igb
EAL: PCI device 0000:04:00.1 on NUMA socket 0
EAL: probe driver: 8086:1521 net_e1000_igb
EAL: PCI device 0000:06:00.0 on NUMA socket 0
EAL: probe driver: 8086:1572 net_i40e
EAL: PCI device 0000:06:00.1 on NUMA socket 0
EAL: probe driver: 8086:1572 net_i40e
EAL: PCI device 0000:06:00.2 on NUMA socket 0
EAL: probe driver: 8086:1572 net_i40e
EAL: PCI device 0000:06:00.3 on NUMA socket 0
EAL: probe driver: 8086:1572 net_i40e
[INFO] Found 1 usable devices:
Device 0: 3C:FD:FE:05:94:C2 (Intel Corporation Ethernet Controller X710 for 10GbE SFP+)
[INFO] Device 0 (3C:FD:FE:05:94:C2) is up: 10000 MBit/s
[WARN] Per-queue rate limit is not supported on this device, setting per-device rate limit to 10 Mbit/s instead (note: this may fail as well if the NIC doesn't support any rate limiting).
[INFO] Detected an IPv4 address.

[Device: id=0] TX: 14.84 Mpps, 7597 Mbit/s (9972 Mbit/s with framing)
[Device: id=0] TX: 14.60 Mpps, 7476 Mbit/s (9812 Mbit/s with framing)
[Device: id=0] TX: 14.86 Mpps, 7609 Mbit/s (9986 Mbit/s with framing)
[Device: id=0] TX: 14.85 Mpps, 7604 Mbit/s (9981 Mbit/s with framing)
[Device: id=0] TX: 14.85 Mpps, 7604 Mbit/s (9981 Mbit/s with framing)`

and with moon-gen simple I get:

sudo ./moongen-simple start tcp-syn-flood4:0:0:rate=10mbit/s
[INFO] Initializing DPDK. This will take a few seconds...
EAL: Detected 32 lcore(s)
EAL: No free hugepages reported in hugepages-1048576kB
EAL: Probing VFIO support...
EAL: PCI device 0000:04:00.0 on NUMA socket 0
EAL: probe driver: 8086:1521 net_e1000_igb
EAL: PCI device 0000:04:00.1 on NUMA socket 0
EAL: probe driver: 8086:1521 net_e1000_igb
EAL: PCI device 0000:06:00.0 on NUMA socket 0
EAL: probe driver: 8086:1572 net_i40e
EAL: PCI device 0000:06:00.1 on NUMA socket 0
EAL: probe driver: 8086:1572 net_i40e
EAL: PCI device 0000:06:00.2 on NUMA socket 0
EAL: probe driver: 8086:1572 net_i40e
EAL: PCI device 0000:06:00.3 on NUMA socket 0
EAL: probe driver: 8086:1572 net_i40e
[INFO] Found 1 usable devices:
Device 0: 3C:FD:FE:05:94:C2 (Intel Corporation Ethernet Controller X710 for 10GbE SFP+)
[INFO] Flow tcp-syn-flood4 => 0x1
[INFO] Waiting for devices to come up...
[INFO] Device 0 (3C:FD:FE:05:94:C2) is up: 10000 MBit/s
[INFO] 1 device is up.
[Device: id=0] TX: 0.02 Mpps, 10 Mbit/s (13 Mbit/s with framing)
[Device: id=0] RX: 0.00 Mpps, 0 Mbit/s (0 Mbit/s with framing)
[Flow: dev=0 uid=0x1] TX: 0.00 Mpps, 0 Mbit/s (0 Mbit/s with framing)
[Flow: dev=0 uid=?] RX: 0.02 Mpps, 9 Mbit/s (12 Mbit/s with framing)
[Device: id=0] TX: 0.02 Mpps, 10 Mbit/s (13 Mbit/s with framing)
[Flow: dev=0 uid=?] RX: 0.02 Mpps, 9 Mbit/s (12 Mbit/s with framing)
[Device: id=0] RX: 0.00 Mpps, 0 Mbit/s (0 Mbit/s with framing)
[Flow: dev=0 uid=0x1] TX: 0.00 Mpps, 0 Mbit/s (0 Mbit/s with framing)
[Device: id=0] TX: 0.02 Mpps, 10 Mbit/s (13 Mbit/s with framing)
[Flow: dev=0 uid=?] RX: 0.02 Mpps, 9 Mbit/s (12 Mbit/s with framing)
[Flow: dev=0 uid=0x1] TX: 0.00 Mpps, 0 Mbit/s (0 Mbit/s with framing)
[Device: id=0] RX: 0.00 Mpps, 0 Mbit/s (0 Mbit/s with framing)
[Device: id=0] TX: 0.02 Mpps, 10 Mbit/s (13 Mbit/s with framing)
[Flow: dev=0 uid=?] RX: 0.02 Mpps, 9 Mbit/s (12 Mbit/s with framing)
[Flow: dev=0 uid=0x1] TX: 0.00 Mpps, 0 Mbit/s (0 Mbit/s with framing)
[Device: id=0] RX: 0.00 Mpps, 0 Mbit/s (0 Mbit/s with framing)
^C[Flow: dev=0 uid=?] RX: 0.02 (StdDev 0.00) Mpps, 9 (StdDev 0) Mbit/s (12 Mbit/s with framing), total 86670 packets with 5546880 bytes (incl. CRC)
[Flow: dev=0 uid=0x1] TX: 0.00 (StdDev 0.00) Mpps, 0 (StdDev 0) Mbit/s (0 Mbit/s with framing), total 0 packets with 0 bytes (incl. CRC)
[Device: id=0] TX: 0.02 (StdDev 0.00) Mpps, 10 (StdDev 0) Mbit/s (13 Mbit/s with framing), total 86720 packets with 5896960 bytes (incl. CRC)
[Device: id=0] RX: 0.00 (StdDev 0.00) Mpps, 0 (StdDev 0) Mbit/s (0 Mbit/s with framing), total 0 packets with 0 bytes (incl. CRC)