I saw that article as well. It seems like they are targeting using RISC-V to build an accelerator. One could argue that you do not need speculation within a GPU-like accelerator, but you have to get your performance from very wide execution units with lots of memory requests in flight as a GPU does today.
On Tue, Jul 17, 2018 at 8:19 AM, John Hearns via Beowulf < beowulf@beowulf.org> wrote: > This article is well worth a read, on European Exascale projects > > https://www.theregister.co.uk/2018/07/17/europes_exascale_ > supercomputer_chips/ > > The automotive market seems to have got mixed in there also! > The main thrust dual ARM based and RISC-V > > Also I like the plexiglass air shroud pictured at Barcelona. I saw > something similar at the HPE centre in Grenoble. > Damn good idea. > > > > > > > > On 17 July 2018 at 13:07, Scott Atchley <e.scott.atch...@gmail.com> wrote: > >> Hi Chris, >> >> They say that no announced silicon is vulnerable. Your link makes it >> clear that no ISA is immune if the implementation performs speculative >> execution. I think your point about two lines of production may make sense. >> Vendors will have to assess vulnerabilities and the performance trade-off. >> >> Personally, I do not see a large HPC system being built out of >> non-speculative hardware. You would need much more hardware to reach a >> level of performance and the additional power could lead to a lower >> performance per Watt (i.e., exceed the facility's power budget). >> >> Scott >> >> On Tue, Jul 17, 2018 at 2:33 AM, Chris Samuel <ch...@csamuel.org> wrote: >> >>> On Tuesday, 17 July 2018 11:08:42 AM AEST Chris Samuel wrote: >>> >>> > Currently these new vulnerabilities are demonstrated on Intel & ARM, >>> it will >>> > be interesting to see if AMD is also vulnerable (I would guess so). >>> >>> Interestingly RISC-V claims immunity, and that looks like it'll be one >>> of the >>> two CPU architectures blessed by the Europeans in their Exascale project >>> (along with ARM). >>> >>> https://riscv.org/2018/01/more-secure-world-risc-v-isa/ >>> >>> All the best, >>> Chris >>> -- >>> Chris Samuel : http://www.csamuel.org/ : Melbourne, VIC >>> >>> _______________________________________________ >>> Beowulf mailing list, Beowulf@beowulf.org sponsored by Penguin Computing >>> To change your subscription (digest mode or unsubscribe) visit >>> http://www.beowulf.org/mailman/listinfo/beowulf >>> >> >> >> _______________________________________________ >> Beowulf mailing list, Beowulf@beowulf.org sponsored by Penguin Computing >> To change your subscription (digest mode or unsubscribe) visit >> http://www.beowulf.org/mailman/listinfo/beowulf >> >> > > _______________________________________________ > Beowulf mailing list, Beowulf@beowulf.org sponsored by Penguin Computing > To change your subscription (digest mode or unsubscribe) visit > http://www.beowulf.org/mailman/listinfo/beowulf > >
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