✎ soc:2010:cooldavid:journal:week11

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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,tftp=/tftproot,bootfile=gpxe_script''
  * 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.
  * Image is placed on Host OS.

^ Network type ^  Linux wget  ^^ gPXE 8K Window ^^ gPXE 64K Window ^^
|     User mode| 550s|  476KB/s|   298KB/s|  880s|    298KB/s|  879s|
|           TAP|   7s|   36MB/s|  5243KB/s|   50s|    495KB/s|  529s|

Trace: • week11 • week2 • journal • week4 • project_plan • week9 • week6 • week12 • project_plan • week3 • week10 • week3 • project_plan • week3 • week0 • week6 • week5