Announcement

Collapse
No announcement yet.

Google's Octopus Is A Gemini Lake Chromebook

Collapse
X
 
  • Filter
  • Time
  • Show
Clear All
new posts

  • chithanh
    replied
    Originally posted by linuxgeex View Post
    I think you still need motherboard support
    Originally posted by linuxgeex View Post
    So jury is still out because we don't know whether that trace exists on the Octopus mobo.
    The traces exist I'm sure. The only thing holding up ECC on AM2/AM3/AM4 was lack of BIOS support. But that could be rectified in 100% of cases by forcing ECC through amd_edac. Until a patch was submitted that disabled the override in Ryzen.

    Leave a comment:


  • My8th
    replied
    Originally posted by FireBurn View Post

    Is it because it has 8 threads?
    Current Gemini Lakes only have upto 4 threads from what I could find.

    Leave a comment:


  • linuxgeex
    replied
    Originally posted by chithanh View Post
    Chromebooks have soldered RAM usually.
    Though I wonder if anyone tried to install ECC memory in the HP Envy x360 or ASUS GL702ZC.

    Actually, you need to revert one small kernel patch that disables forcing ECC on Ryzen, then you can enable ECC even without mobo support.
    I think you still need motherboard support - unless I'm mistaken parity errors are handled by the motherboard. If there was no need for motherboard support then a pin-compatible ECC DIMM would do its job regardless of whether the motherboard or CPU was aware of whether it was even an ECC part. I guess if the memory controller is in the SOC then that is the same thing as mobo support though, so you may be right.

    The google foo jury is out as far as a simple yes/no is concerned. I thought I found an answer but it was DDR4 command/address parity checking (bus parity) not ECC.

    Aha... so the data bus is 72 bits - 64 for data, 8 for ECC. In non-ECC DIMMs the extra 8 bits are used for address/command parity. These features are mutually exclusive. Either you have non-ECC DIMMs with command/address parity, or you have ECC DIMMs with error correcting codes. The mode is controlled via a single trace - PARITY and reporting is via the ERROR_N trace. The modality is controlled by the memory controller. So yes, the Ryzen cores with integrated memory controller can switch between ECC and non-ECC in software so long as the motherboard extends the PARITY trace to the sockets. Otherwise the socket will be locked in one mode or the other.

    So jury is still out because we don't know whether that trace exists on the Octopus mobo.
    Last edited by linuxgeex; 22 February 2018, 07:24 PM.

    Leave a comment:


  • chithanh
    replied
    Originally posted by starshipeleven View Post
    Oooh... it will support ECC ram. Considering that chromebooks are using Coreboot and that DDR4 ECC does not require different sockets, it should be possible to finally have ECC on a laptop.
    Chromebooks have soldered RAM usually.
    Though I wonder if anyone tried to install ECC memory in the HP Envy x360 or ASUS GL702ZC.

    Originally posted by linuxgeex View Post
    But ECC will require motherboard support and 5 RAM sockets... I don't think we'll see that in a chromebook!
    Actually, you need to revert one small kernel patch that disables forcing ECC on Ryzen, then you can enable ECC even without mobo support.

    Leave a comment:


  • linuxgeex
    replied
    Originally posted by starshipeleven View Post
    Oooh... it will support ECC ram. Considering that chromebooks are using Coreboot and that DDR4 ECC does not require different sockets, it should be possible to finally have ECC on a laptop.
    But ECC will require motherboard support and 5 RAM sockets... I don't think we'll see that in a chromebook!

    Leave a comment:


  • linuxgeex
    replied
    Originally posted by ssokolow View Post
    Octopus. I just can't help but be reminded of countless jokes at Google's expense that have been made over the years. ("The Google Data Kraken", putting up an array of ad company logos with Google's being replaced with Cthulhu, etc.)

    As George Carlin said during his Airline Announcements segment, "Final Approach is another one. Final is not a word you want to be using with an airplane."
    Hail Hydra!

    Leave a comment:


  • calc
    replied
    Originally posted by Xaero_Vincent View Post
    Chromebooks are cool with the Android app capability and have an EPIK one myself. That said, I found out its possible to use the Intel graphics virtualization feature for Android guests running on regular PCs and Linux distributions. That means accelerated OpenGL ES and Vulkan for Android on Linux via QEMU.
    Where did you get the Android 8.1 image that you are using with qemu?

    Leave a comment:


  • starshipeleven
    replied
    Originally posted by chimpy View Post
    Not completely relevant, but hopefully one of these AMD SOCs becomes a Chromebook:

    https://www.guru3d.com/news-story/em...mini-lake.html
    Oooh... it will support ECC ram. Considering that chromebooks are using Coreboot and that DDR4 ECC does not require different sockets, it should be possible to finally have ECC on a laptop.

    Leave a comment:


  • FireBurn
    replied
    Originally posted by ssokolow View Post
    Octopus. I just can't help but be reminded of countless jokes at Google's expense that have been made over the years. ("The Google Data Kraken", putting up an array of ad company logos with Google's being replaced with Cthulhu, etc.)

    As George Carlin said during his Airline Announcements segment, "Final Approach is another one. Final is not a word you want to be using with an airplane."
    Is it because it has 8 threads?

    Leave a comment:


  • ssokolow
    replied
    Octopus. I just can't help but be reminded of countless jokes at Google's expense that have been made over the years. ("The Google Data Kraken", putting up an array of ad company logos with Google's being replaced with Cthulhu, etc.)

    As George Carlin said during his Airline Announcements segment, "Final Approach is another one. Final is not a word you want to be using with an airplane."

    Leave a comment:

Working...
X