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==== Benchmark plan ==== * Performance test sites * http://netboot.me/ * http://boot.fedoraproject.org/index * http://boot.kernel.org/ * Test env: * KVM with different kind of emulated NIC. * Direct link. * User mode network stack. * With TUN/TAP * Bridge/NAT with TUN/TAP. * Native gPXE. * Debug KVM suprt slow performance with user mode network stack. ==== Benchmark result ==== === KVM-QEMU TAP versus User mode network stack === * Parameters for user mode network stack: "-net nic -net user" * Parameters for TAP network: "-net nic -net tap,ifname=tap0,script=no" * Default interface for guest OS is Realtek 8139. * Get a disk image with 268,435,456 bytes. ^ Network type ^ Linux wget ^ gPXE 8K Window ^ gPXE 64K Window ^ | User mode| 550s| s| s| | TAP| 7s| s| s|