By: juanrga (nospam.delete@this.juanrga.com), March 6, 2015 5:22 pm
Room: Moderated Discussions
Wilco (Wilco.Dijkstra.delete@this.ntlworld.com) on March 6, 2015 2:31 pm wrote:
> Brett (ggtgp.delete@this.yahoo.com) on March 6, 2015 12:57 pm wrote:
> > David Kanter (dkanter.delete@this.realworldtech.com) on March 6, 2015 12:42 am wrote:
> > > > A57 is definitely more than 20% faster at the same clock, as you can easily conclude
> > > > from various benchmarks (eg. Geekbench shows 40% single threaded gain overall
> > > > in AArch32 mode between Galaxy S5 and Galaxy S6 at the same clock).
> > >
> > > That's a bogus comparison since Geekbench contains lots of AES
> > > stuff, and ARM64 contains special instructions for AES.
> >
> > Are you accusing ARM of pulling an Intel, making sure that benchmarks are dominated
> > by feature X right before Intel adds feature X to the instruction set. ;)
> >
> > This tactic is old hat, blatantly obvious for over a decade. Happy
> > to see that ARM is playing by the rules of the CPU market.
>
> Yeah ARM is to blame, after all Intel only added AES early 2010...
>
> > > What's the speedup on GCC?
> >
> > GCC is the worst pointer chasing spaghetti on the planet. You have to brute force tweak hundreds
> > of CPU details so as not to get burned by one of a hundred glass jaws that will cripple your
> > performance. This takes billions of dollars that AMD does not have, much less tiny ARM.
> >
> > Unless IBM gets into the ARM64 business Intel is going to dominate the GCC comparison
> > for the next two decades, longer than I expect Intel to survive as dominate company.
> > $15 SOC's don't generate the sort of revenues that justify optimizing for GCC.
>
> GCC is a hard benchmark indeed but it's not going to cost billions of dollars to design next
> generation CPUs that do better. Did Athlon64 cost billions? All it took was a brilliant design
> and a great team to make it happen. The trend is obvious, each new generation of ARM cores improves
> by 30-50%. I wonder what would happen if say the Athlon64 designer does an ARM...
I don't expect K12 to be significantly better than Vulcan.
> Brett (ggtgp.delete@this.yahoo.com) on March 6, 2015 12:57 pm wrote:
> > David Kanter (dkanter.delete@this.realworldtech.com) on March 6, 2015 12:42 am wrote:
> > > > A57 is definitely more than 20% faster at the same clock, as you can easily conclude
> > > > from various benchmarks (eg. Geekbench shows 40% single threaded gain overall
> > > > in AArch32 mode between Galaxy S5 and Galaxy S6 at the same clock).
> > >
> > > That's a bogus comparison since Geekbench contains lots of AES
> > > stuff, and ARM64 contains special instructions for AES.
> >
> > Are you accusing ARM of pulling an Intel, making sure that benchmarks are dominated
> > by feature X right before Intel adds feature X to the instruction set. ;)
> >
> > This tactic is old hat, blatantly obvious for over a decade. Happy
> > to see that ARM is playing by the rules of the CPU market.
>
> Yeah ARM is to blame, after all Intel only added AES early 2010...
>
> > > What's the speedup on GCC?
> >
> > GCC is the worst pointer chasing spaghetti on the planet. You have to brute force tweak hundreds
> > of CPU details so as not to get burned by one of a hundred glass jaws that will cripple your
> > performance. This takes billions of dollars that AMD does not have, much less tiny ARM.
> >
> > Unless IBM gets into the ARM64 business Intel is going to dominate the GCC comparison
> > for the next two decades, longer than I expect Intel to survive as dominate company.
> > $15 SOC's don't generate the sort of revenues that justify optimizing for GCC.
>
> GCC is a hard benchmark indeed but it's not going to cost billions of dollars to design next
> generation CPUs that do better. Did Athlon64 cost billions? All it took was a brilliant design
> and a great team to make it happen. The trend is obvious, each new generation of ARM cores improves
> by 30-50%. I wonder what would happen if say the Athlon64 designer does an ARM...
I don't expect K12 to be significantly better than Vulcan.
