5 ms·

I've always wondered why my Mac jumps right on the network, while other devices such as my Xbox 360 take a few seconds before the connection is there. I'd be i

I've always wondered why my Mac jumps right on the network, while other devices such as my Xbox 360 take a few seconds before the connection is there. I'd be interested to see how the Google Chrome CR-48 handles DHCP since it seems like it takes a bit of time before getting online and allowing me to log in to it.

masklinn 15y ago
ChromeOS is based on linux, so I'd expect something similar to what Android does: userland dhclient with the same performance profile as the tablet he tested.
- MostAwesomeDude 15y ago
  "Chrome OS" is Gentoo, not Android. One of my friends has a Cr47 and some hacking exposed dhcpcd inside, with some unspecified patching to bring it down to sub-second DHCP.
  - daniel_solano 15y ago
    I believe that Android also uses dhcpcd, if I recall correctly from recently browsing the source code. I do not know whether or how Android's dhcpcd may be modified.
    - bugmenot 15y ago
      Hard to say: http://android.git.kernel.org/?p=platform/external/dhcpcd.git;a=shortlog http://android.git.kernel.org/?p=platform/external/dhcpcd.gi...
  - bugmenot 15y ago
    The patching is definitely specified (Chromium OS is partially open source after all): http://git.chromium.org/gitweb/?p=chromiumos/third_party/dhcpcd.git;a=summary http://git.chromium.org/gitweb/?p=chromiumos/third_party/dhc...
- kcbanner 15y ago
  I think I'd still prefer the standards compliant client, even if it was a slightly slower. Kicking other users off the network isn't a good thing.
- simmons 15y ago
  I'm the author of the original blog post. I also ran my tests with a Samsung Series 5 Chromebook. Its DHCP Vendor-Class string is "dhcpcd 5.1.4". The DHCP performance seems fair, around 2 seconds. However, the total network initialization time tends to be a bit longer. It may have some of the same link establishment delays that I'm seeing on my Ubuntu 10.04 EeePC.

masklinn 15y ago

ChromeOS is based on linux, so I'd expect something similar to what Android does: userland dhclient with the same performance profile as the tablet he tested.

MostAwesomeDude 15y ago
"Chrome OS" is Gentoo, not Android. One of my friends has a Cr47 and some hacking exposed dhcpcd inside, with some unspecified patching to bring it down to sub-second DHCP.
- daniel_solano 15y ago
  I believe that Android also uses dhcpcd, if I recall correctly from recently browsing the source code. I do not know whether or how Android's dhcpcd may be modified.
  - bugmenot 15y ago
    Hard to say: http://android.git.kernel.org/?p=platform/external/dhcpcd.git;a=shortlog http://android.git.kernel.org/?p=platform/external/dhcpcd.gi...
- bugmenot 15y ago
  The patching is definitely specified (Chromium OS is partially open source after all): http://git.chromium.org/gitweb/?p=chromiumos/third_party/dhcpcd.git;a=summary http://git.chromium.org/gitweb/?p=chromiumos/third_party/dhc...
kcbanner 15y ago
I think I'd still prefer the standards compliant client, even if it was a slightly slower. Kicking other users off the network isn't a good thing.
simmons 15y ago
I'm the author of the original blog post. I also ran my tests with a Samsung Series 5 Chromebook. Its DHCP Vendor-Class string is "dhcpcd 5.1.4". The DHCP performance seems fair, around 2 seconds. However, the total network initialization time tends to be a bit longer. It may have some of the same link establishment delays that I'm seeing on my Ubuntu 10.04 EeePC.