✎ soc:2010:cooldavid:journal:week12

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==== Port wscale branch against current gPXE master ====
Recent TCP updates is a lot different from previous base of wscale branch.

==== Adding some facilities for testing convenience ====
  * Add a command to modify TCP window size at runtime.
  * print "\b%c" instead of "." in monojob, keep the console clean.
  * Add a ''pause'' command.

[[http://git.etherboot.org/?p=people/cooldavid/gpxe.git;a=shortlog;h=refs/heads/wscale2_test|wscale2 testing branch]]
[[http://git.etherboot.org/?p=people/cooldavid/gpxe.git;a=shortlog;h=refs/heads/tcpfix2_test|tcpfix2 testing branch]]

==== Window size difference ====
  * Test target image on BKO: http://130.239.17.17/bko/live/fedora/f13-alpha/i686/initrd0.img
  * Image size: 43,355,267 bytes
  * Linux wget speed: 1MByte/s (My Internet link speed is 10Mbit/s, it's about the full spped.)
  * Tested it with emulated rtl8139 of KVM, and Native on rtl8139 hardware.

^ Window Size ^   tcpfix2 branch    ^^    wscale2 branch    ^^
^             ^ KVM TAP/NAT ^  Native ^ KVM TAP/NAT ^  Native ^
|           8K|       17KB/s|   16KB/s|             |   16KB/s|
|          16K|       43KB/s|   43KB/s|             |   41KB/s|
|          32K|       94KB/s|   93KB/s|             |   91KB/s|
|          64K|      198KB/s|  192KB/s|             |  187KB/s|
|         128K|             |         |             |  374KB/s|
|         256K|             |         |             |  742KB/s|
|         512K|             |         |             |     KB/s|
|        1024K|             |         |             |     KB/s|

Trace: • week9 • qemupxe • week1 • debian_and_ubuntu • ubuntubko • week11 • week1 • week1 • windows_xp_iscsi • tftpd-hpa • week6 • project_plan • week2 • week12