one vm running network loopback
KVM testing on Ubuntu 18.04 via the Phoronix Test Suite.


Realtek RTL-8100: 

	Processor: Intel Core @ 3.59GHz (1 Core), Motherboard: QEMU Standard PC (i440FX + PIIX 1996) (1.10.2-1ubuntu1 BIOS), Chipset: Intel 440FX- 82441FX PMC, Memory: 1280MB, Disk: 43GB QEMU HDD, Graphics: Red Hat QXL paravirtual graphic card, Audio: QEMU Generic, Network: Realtek RTL-8100/8101L/8139

	OS: Ubuntu 18.04, Kernel: 4.15.0-34-generic (x86_64), Compiler: GCC 7.3.0, File-System: ext4, Screen Resolution: 1024x768, System Layer: KVM


Loopback TCP Network Performance
Time To Transfer 10GB Via Loopback
Seconds < Lower Is Better
Realtek RTL-8100 . 15.62 |=====================================================