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Linux Hardware

Linux Preps for Kunpeng ARM Server SoC With High Bandwidth Memory (phoronix.com) 25

An anonymous reader shared this report from Phoronix: New Linux patches from Huawei engineers are preparing new driver support for controlling High Bandwidth Memory (HBM) with the ARM-based Kunpeng high performance SoC...

[I]t would appear there is a new Kunpeng SoC coming that will feature integrated High Bandwidth Memory (HBM).Unless I missed something, this Kunpeng SoC with HBM memory hasn't been formally announced yet and I haven't been able to find any other references short of pointing to prior kernel patches working on this HBM integration... It will be interesting to see what comes of Huawei Kunpeng SoCs with HBM memory and ultimately how well they perform against other AArch64 server processors as well as the Intel Xeon and AMD EPYC competition.

Linux Preps for Kunpeng ARM Server SoC With High Bandwidth Memory

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  • Huawei Kunpeng SoCs with HBM memory, Huawei Kunpeng SoCs with HBM memory did we mention Huawei Kunpeng SoCs with HBM memory?
    • by rta ( 559125 ) on Friday December 06, 2024 @05:12PM (#64996695)

      Exactly. The first question is "What is it and why does it need a driver?". The summary says it as if that's something obvious and provides no info. TFA though helpfully quotes some of the commit messages that point out it's a transparent cache layer that the OS _doesn't_ need to worry about, and this driver is just an on/off power switch for the feature in case you don't want to pay the power penalty.

      Add a driver for High Bandwidth Memory (HBM) cache, which provides user space interfaces to power on/off the HBM cache. Use HBM as a cache can take advantage of the high bandwidth of HBM in normal memory access, and OS does not need to aware of the existence of HBM cache. For workloads which does not require a high memory access bandwidth, power off the HBM cache device can help save energy.

      • by gweihir ( 88907 )

        HBM does not _need_ a driver. But if the OS is told that some memory is significantly faster, it benefits from a driver.

  • Why do I find myself doubting you'll ever see this in the bigoted USA?

    • by gtall ( 79522 )

      Red State America is bigoted? Who knew?

    • You can jump on aliexpress.us right now and buy a Loongson. Why do you think you wouldn't be able to buy one of these? You will pay an inflated price soon, of course...

      • You can jump on aliexpress.us right now and buy a Loongson. Why do you think you wouldn't be able to buy one of these? You will pay an inflated price soon, of course...

        If you are willing to pay top U$D for the big hoonking server where these chips are attached, then certainly, you can buy one.

        There are Loonsooons for desktop and server, but for the time being, Kumpengs are server only.

    • What is "this"? Kunpeng ARM SoC with HBM or Linux?

  • Bandwidth is distinction that makes difference not infinitesimal speed ups other than its nice having mem adjacency for roundtrips.
    How nice it would be to have more channels rather than trafficking faster

"Card readers? We don't need no stinking card readers." -- Peter da Silva (at the National Academy of Sciencies, 1965, in a particularly vivid fantasy)

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