Article: Knights Landing Details
By: noko (noko.delete@this.noko.com), August 4, 2018 8:46 pm
Room: Moderated Discussions
Travis (travis.downs.delete@this.gmail.com) on August 4, 2018 2:38 pm wrote:
> Brett (ggtgp.delete@this.yahoo.com) on August 4, 2018 1:55 pm wrote:
> > C++ is a total dead end.
> > I would recommend a real language like Swift or Go instead, but autovectorization is not available yet.
>
> I don't think anyone knowledgeable would call C++ not a "real" language. If anything,
> it is too real: the complexity implied by the language itself, principles like "zero-cost
> abstractions" and then the various features added over 30+ years with last couple decades
> being "by committee" is incredible and daunting to any newcomer.
>
> I doubt Swift or Go will ever replace C++.
Specifically for autovectorization, I don't know of any advantage Swift, Go, or Rust inherently have over C++; they all share the same issue that everyone uses imperative loops. They could add loops with more relaxed ordering constraints to ease autovectorization, but C++17 already has those with parallel_vector_execution_policy...
> > #pragma clang loop vectorize(enable)
> > #pragma clang loop vectorize_width(2) interleave_count(2)
> >
> > And a long list of variants for loops so that you do not have to write assembly.
> > https://llvm.org/docs/Vectorizers.html
>
> What's your point? Do you think people writing BLAS kernels
> or media codecs or whatever are using these widely?
>
> Sure they are useful, just like any other hints you can provide to the compiler, but they
> don't change the basic equation of auto-vectorization. In particular, they don't automatically
> make the vectorizer smarter (except that you can fix some parameters like width).
These pragmas also specify that the order of execution within each loop iteration is undefined with respect to other loop iterations (or only sequenced after N iterations, or whatever), which is a basic requirement to even consider vectorizing a loop. A compiler sufficiently smart to infer that for most loops still doesn't exist... So you could consider these pragmas as a weak form of explicit vectorization, I guess.
Also, OpenMP standardized these pragmas across the major compiler vendors, so if you use theirs it's not like you're completely locked into a single compiler. As far as wanting to use them, well, I've got some larger loops with complex control flow that I expect would gain from AVX-512's predication. They're complex enough that I don't want to re-write them in intrinsics (:effort: and I suspect the predication would make a near-unreadable mess, especially pre-AVX512.)
Buuut... yeah, it's still really easy for clang's vectorizer to throw its hands up at nonstandard control flow, even where I'd expect similar code to remain vectorized in GPU compilers. Oh well...
> Brett (ggtgp.delete@this.yahoo.com) on August 4, 2018 1:55 pm wrote:
> > C++ is a total dead end.
> > I would recommend a real language like Swift or Go instead, but autovectorization is not available yet.
>
> I don't think anyone knowledgeable would call C++ not a "real" language. If anything,
> it is too real: the complexity implied by the language itself, principles like "zero-cost
> abstractions" and then the various features added over 30+ years with last couple decades
> being "by committee" is incredible and daunting to any newcomer.
>
> I doubt Swift or Go will ever replace C++.
Specifically for autovectorization, I don't know of any advantage Swift, Go, or Rust inherently have over C++; they all share the same issue that everyone uses imperative loops. They could add loops with more relaxed ordering constraints to ease autovectorization, but C++17 already has those with parallel_vector_execution_policy...
> > #pragma clang loop vectorize(enable)
> > #pragma clang loop vectorize_width(2) interleave_count(2)
> >
> > And a long list of variants for loops so that you do not have to write assembly.
> > https://llvm.org/docs/Vectorizers.html
>
> What's your point? Do you think people writing BLAS kernels
> or media codecs or whatever are using these widely?
>
> Sure they are useful, just like any other hints you can provide to the compiler, but they
> don't change the basic equation of auto-vectorization. In particular, they don't automatically
> make the vectorizer smarter (except that you can fix some parameters like width).
These pragmas also specify that the order of execution within each loop iteration is undefined with respect to other loop iterations (or only sequenced after N iterations, or whatever), which is a basic requirement to even consider vectorizing a loop. A compiler sufficiently smart to infer that for most loops still doesn't exist... So you could consider these pragmas as a weak form of explicit vectorization, I guess.
Also, OpenMP standardized these pragmas across the major compiler vendors, so if you use theirs it's not like you're completely locked into a single compiler. As far as wanting to use them, well, I've got some larger loops with complex control flow that I expect would gain from AVX-512's predication. They're complex enough that I don't want to re-write them in intrinsics (:effort: and I suspect the predication would make a near-unreadable mess, especially pre-AVX512.)
Buuut... yeah, it's still really easy for clang's vectorizer to throw its hands up at nonstandard control flow, even where I'd expect similar code to remain vectorized in GPU compilers. Oh well...
Topic | Posted By | Date |
---|---|---|
Knights Landing details (new article) | David Kanter | 2014/01/02 11:58 PM |
eDRAM as cache | iz | 2014/01/03 03:39 AM |
eDRAM options | Eric Bron | 2014/01/09 02:45 AM |
Knights Landing details (new article) | Emil Briggs | 2014/01/03 05:06 AM |
Knights Landing details (new article) | Michael S | 2014/01/03 06:05 AM |
PCI-E and QPI | David Kanter | 2014/01/03 11:11 AM |
eDRAM still seems too expensive ... | Mark Roulo | 2014/01/03 09:48 AM |
Nevermind ... I see that you addressed this :-) | Mark Roulo | 2014/01/03 09:51 AM |
eDRAM still seems too expensive ... | Eric Bron | 2014/01/03 12:42 PM |
eDRAM or stacked DRAM? | Patrick Chase | 2014/01/03 10:21 AM |
eDRAM or stacked DRAM? | Wes Felter | 2014/01/03 02:00 PM |
eDRAM or stacked DRAM? | Patrick Chase | 2014/01/03 06:26 PM |
eDRAM or stacked DRAM? | tarlinian | 2014/06/23 08:59 PM |
eDRAM or stacked DRAM? | Maynard Handley | 2014/06/24 12:47 AM |
eDRAM or stacked DRAM? | Michael S | 2014/06/24 02:13 AM |
eDRAM or stacked DRAM? | David Kanter | 2014/06/24 11:09 AM |
eDRAM or stacked DRAM? | anon | 2014/06/24 06:50 PM |
eDRAM or stacked DRAM? | Eric Bron | 2014/06/24 09:02 PM |
eDRAM or stacked DRAM? | anon | 2014/06/24 09:39 PM |
eDRAM or stacked DRAM? | Michael S | 2014/06/25 12:46 AM |
eDRAM or stacked DRAM? | Michael S | 2014/06/25 12:29 AM |
eDRAM or stacked DRAM? | Eric Bron | 2014/06/24 04:37 AM |
eDRAM or stacked DRAM? | tarlinian | 2014/06/24 07:53 AM |
eDRAM or stacked DRAM? | Eric Bron | 2014/06/24 08:09 AM |
eDRAM or stacked DRAM? | tarlinian | 2014/06/24 08:40 AM |
eDRAM or stacked DRAM? | Eric Bron | 2014/06/24 09:10 AM |
eDRAM or stacked DRAM? | Eric Bron | 2014/06/24 09:12 AM |
eDRAM or stacked DRAM? | Wes Felter | 2014/06/24 09:09 PM |
eDRAM or stacked DRAM? | Michael S | 2014/06/25 01:02 AM |
Why not tag-inclusive L3? | Paul A. Clayton | 2014/01/03 03:28 PM |
Why not tag-inclusive L3? | Eric Bron | 2014/01/04 02:22 AM |
Knights Landing L/S bandwidth | Nicolas Capens | 2014/01/04 04:43 AM |
Knights Landing L/S bandwidth | Eric Bron | 2014/01/04 05:20 AM |
Knights Landing L/S bandwidth | Nicolas Capens | 2014/01/04 01:55 PM |
Knights Landing L/S bandwidth | Eric Bron | 2014/01/04 02:27 PM |
Knights Landing L/S bandwidth | hobold | 2014/01/04 03:23 PM |
Knights Landing L/S bandwidth | Eric Bron | 2014/01/04 04:20 PM |
Knights Landing L/S bandwidth | Michael S | 2014/01/05 02:42 AM |
Knights Landing L/S bandwidth | Eric Bron | 2014/01/05 02:49 AM |
Knights Landing L/S bandwidth | Patrick Chase | 2014/01/11 07:13 PM |
Knights Landing L/S bandwidth | Nicolas Capens | 2014/01/13 07:39 PM |
Knights Landing L/S bandwidth | Nicolas Capens | 2014/01/05 02:18 PM |
Knights Landing L/S bandwidth | Michael S | 2014/01/06 03:09 AM |
Knights Landing L/S bandwidth | Eric Bron | 2014/01/06 04:11 AM |
Knights Landing L/S bandwidth | Michael S | 2014/01/06 04:40 AM |
Knights Landing L/S bandwidth | Eric Bron | 2014/01/06 04:54 AM |
Knights Landing L/S bandwidth | Eric Bron | 2014/01/08 08:00 AM |
Knights Landing L/S bandwidth | Nicolas Capens | 2014/01/07 02:31 PM |
Knights Landing L/S bandwidth | Michael S | 2014/01/07 03:17 PM |
Knights Landing L/S bandwidth | Nicolas Capens | 2014/01/07 08:55 PM |
Knights Landing L/S bandwidth | Michael S | 2014/01/08 12:42 AM |
Knights Landing L/S bandwidth | Gabriele Svelto | 2014/01/08 07:30 AM |
Occam's razor | Nicolas Capens | 2014/01/08 01:33 PM |
Occam's razor | Gabriele Svelto | 2014/01/08 01:51 PM |
Occam's razor | Eric Bron | 2014/01/08 02:28 PM |
Occam's razor | bakaneko | 2014/01/09 03:45 AM |
Occam's razor | anon | 2014/01/09 04:02 AM |
Occam's razor | bakaneko | 2014/01/09 05:24 AM |
Occam's razor | bakaneko | 2014/01/09 05:51 AM |
Occam's razor | anon | 2014/01/09 06:18 AM |
Occam's razor | anon | 2014/01/09 06:16 AM |
Occam's razor | bakaneko | 2014/01/09 07:43 AM |
Occam's razor | anon | 2014/01/09 08:17 AM |
Occam's razor | bakaneko | 2014/01/09 10:12 AM |
Occam's razor | Eric Bron | 2014/01/09 10:18 AM |
Occam's razor | bakaneko | 2014/01/09 10:58 AM |
Occam's razor | anon | 2014/01/09 11:35 AM |
Occam's razor | bakaneko | 2014/01/12 09:48 AM |
99.9% not a new extension | Nicolas Capens | 2014/01/10 10:39 AM |
Compiler complexity | Gabriele Svelto | 2014/01/11 02:58 AM |
Compiler complexity | Nicolas Capens | 2014/01/11 12:20 PM |
Compiler complexity | Gabriele Svelto | 2014/01/11 02:17 PM |
Patent pending | Nicolas Capens | 2014/01/14 06:21 PM |
99.9% not a new extension | bakaneko | 2014/01/12 10:08 AM |
L0 data cache | Eric Bron | 2014/01/08 03:52 PM |
Occam's razor | David Kanter | 2014/01/08 03:53 PM |
Occam's razor | Nicolas Capens | 2014/01/09 02:07 AM |
Occam's razor | Ricardo B | 2014/01/09 04:21 AM |
Virtually indexed, untagged | Nicolas Capens | 2014/01/10 10:27 AM |
Virtually indexed, untagged | Gabriele Svelto | 2014/01/11 03:08 AM |
Virtually indexed, untagged | Nicolas Capens | 2014/01/11 08:45 PM |
Virtually indexed, untagged | David Kanter | 2014/01/12 01:13 AM |
Virtually indexed, untagged | anon | 2014/01/12 03:02 AM |
Virtually indexed, untagged | Nicolas Capens | 2014/01/16 08:55 AM |
Virtually indexed, untagged | Michael S | 2014/01/12 03:09 AM |
Virtually indexed, untagged | Nicolas Capens | 2014/01/16 09:47 AM |
Occam's razor | David Kanter | 2014/01/09 05:42 PM |
Occam's razor | Nicolas Capens | 2014/01/10 01:22 PM |
Occam's razor | David Kanter | 2014/01/10 03:06 PM |
MEM : ALU ratio | Nicolas Capens | 2014/01/10 11:24 PM |
MEM : ALU ratio | Gabriele Svelto | 2014/01/11 02:47 AM |
MEM : ALU ratio | Eric Bron | 2014/01/11 03:41 AM |
MEM : ALU ratio | Eric Bron | 2014/01/11 04:06 AM |
MEM : ALU ratio | David Kanter | 2014/01/11 07:28 PM |
MEM : ALU ratio | Eric Bron nli | 2014/01/12 01:54 AM |
MEM : ALU ratio | Gabriele Svelto | 2014/01/11 09:15 AM |
MEM : ALU ratio | Nicolas Capens | 2014/01/14 05:56 PM |
Etiquette in linking to papers | Paul A. Clayton | 2014/01/14 06:44 PM |
MEM : ALU ratio | anon | 2014/01/14 07:32 PM |
L0 power cost | Nicolas Capens | 2014/01/16 01:05 PM |
L0 power cost | anon | 2014/01/16 09:01 PM |
L0 power cost | Nicolas Capens | 2014/01/18 11:30 PM |
Links revealed | Paul A. Clayton | 2014/01/19 03:47 PM |
L0 power cost | anon | 2014/01/20 12:19 AM |
L0 power cost | Nicolas Capens | 2014/01/20 01:49 PM |
L0 power cost | anon | 2014/01/21 12:18 AM |
Q.E.D. | Nicolas Capens | 2014/01/21 07:44 PM |
Q.E.D. | anon | 2014/01/21 08:24 PM |
Straw man | Nicolas Capens | 2014/01/23 10:56 PM |
Straw man | anon | 2014/01/25 05:46 AM |
Still waiting for an explanation | Nicolas Capens | 2014/01/25 11:19 PM |
Still waiting for an explanation | Exophase | 2014/01/26 12:13 PM |
Still waiting for an explanation | bakaneko | 2014/01/26 10:52 PM |
Q.E.D. | Ricardo B | 2014/01/22 05:58 PM |
Q.E.D. | Michael S | 2014/01/23 03:59 AM |
L0 entry count | Nicolas Capens | 2014/01/24 12:11 AM |
L0 entry count | Eric Bron | 2014/01/24 01:08 AM |
L0 entry count | Michael S | 2014/01/24 05:18 AM |
L0 entry count | Eric Bron | 2014/01/24 06:15 AM |
L0 entry count | Michael S | 2014/01/24 07:10 AM |
L0 entry count | Eric Bron | 2014/01/24 07:20 AM |
L0 entry count | Nicolas Capens | 2014/01/24 01:33 PM |
L0 entry count | Eric Bron | 2014/01/24 02:20 PM |
L0 entry count and L1 read port orthogonality | Nicolas Capens | 2014/01/26 12:14 AM |
L0 entry count and L1 read port orthogonality | Eric Bron | 2014/01/26 02:49 AM |
L0 hit rate | Nicolas Capens | 2014/01/23 11:49 PM |
L0 hit rate | Ricardo B | 2014/01/24 05:42 AM |
L0 hit rate | Exophase | 2014/01/24 12:37 PM |
L0 hit rate | Eric Bron | 2014/01/24 01:12 PM |
L0 vs RF power | Nicolas Capens | 2014/01/24 01:43 PM |
MEM : ALU ratio | David Kanter | 2014/01/11 12:47 PM |
MEM : ALU ratio | Nicolas Capens | 2014/01/16 08:23 AM |
MEM : ALU ratio | Stubabe | 2014/01/17 11:58 AM |
MEM : ALU ratio | Stubabe | 2014/01/17 12:42 PM |
MEM : ALU ratio | Michael S | 2014/01/18 03:57 PM |
MEM : ALU ratio | bakaneko | 2014/01/18 11:47 PM |
MEM : ALU ratio | Nicolas Capens | 2014/01/20 02:48 PM |
It's called "tunnel vision" (NT) | iz | 2014/01/20 03:36 PM |
MEM : ALU ratio | Michael S | 2014/01/20 03:37 PM |
MEM : ALU ratio | Stubabe | 2014/01/21 03:54 PM |
MEM : ALU ratio | Nicolas Capens | 2014/01/21 09:07 PM |
MEM : ALU ratio | Michael S | 2014/01/22 07:17 AM |
MEM : ALU ratio | Nicolas Capens | 2014/01/24 02:33 PM |
MEM : ALU ratio | Stubabe | 2014/01/21 03:32 PM |
MEM : ALU ratio | Michael S | 2014/01/22 07:56 AM |
MEM : ALU ratio | Stubabe | 2014/01/23 08:06 AM |
MEM : ALU ratio | Eric Bron | 2014/01/23 08:45 AM |
edit | Eric Bron | 2014/01/23 08:49 AM |
MEM : ALU ratio | Michael S | 2014/01/23 08:58 AM |
MEM : ALU ratio | Eric Bron | 2014/01/23 09:29 AM |
MEM : ALU ratio | Michael S | 2014/01/23 09:33 AM |
MEM : ALU ratio | Stubabe | 2014/01/24 03:50 AM |
MEM : ALU ratio | bakaneko | 2014/01/23 09:36 AM |
MEM : ALU ratio | NoSpammer | 2014/01/11 02:39 PM |
L1 vs L0 access cost | Nicolas Capens | 2014/01/16 02:17 PM |
L1 vs L0 access cost | NoSpammer | 2014/01/19 12:48 PM |
L1 vs L0 access cost | dmcq | 2014/01/22 04:45 AM |
L1 vs L0 access cost | Gabriele Svelto | 2014/01/22 06:29 AM |
L1 vs L0 access cost | dmcq | 2014/01/22 12:33 PM |
L1 vs L0 access cost | Gabriele Svelto | 2014/01/22 03:33 PM |
L1 vs L0 access cost | dmcq | 2014/01/24 03:19 AM |
L1 vs L0 access cost | Nicolas Capens | 2014/01/24 01:16 AM |
Occam's razor | Patrick Chase | 2014/01/13 10:19 AM |
Occam's razor | Nicolas Capens | 2014/01/08 11:40 PM |
Occam's razor | Gabriele Svelto | 2014/01/09 01:41 AM |
Occam's razor | Eric Bron | 2014/01/09 01:54 AM |
Occam's razor | Gabriele Svelto | 2014/01/09 05:35 AM |
Occam's razor | Eric Bron | 2014/01/09 06:14 AM |
avoiding redundant loads | Eric Bron | 2014/01/09 06:18 AM |
AVX2 version | Eric Bron | 2014/01/09 06:32 AM |
Occam's razor | Amiba Gelos | 2014/01/09 02:01 AM |
Occam's razor | Eric Bron | 2014/01/09 02:06 AM |
Occam's razor | Amiba Gelos | 2014/01/09 02:43 AM |
Occam's razor | Eric Bron | 2014/01/09 03:02 AM |
L0 access latency | Nicolas Capens | 2014/01/09 03:27 AM |
L0 access latency | Amiba Gelos | 2014/01/09 04:16 AM |
compared to L0$ i would say banking is far more likely (NT) | Amiba Gelos | 2014/01/09 04:20 AM |
L0 access latency | Nicolas Capens | 2014/01/10 02:20 PM |
Occam's razor | Nicolas Capens | 2014/01/09 03:19 AM |
Occam's razor | NoSpammer | 2014/01/09 11:55 AM |
Occam's razor | Nicolas Capens | 2014/01/10 02:40 PM |
Occam's razor | Michael S | 2014/01/11 09:21 AM |
Occam's razor | Michael S | 2014/01/12 02:21 PM |
KNC compiler output | Nicolas Capens | 2014/01/16 05:39 PM |
KNC compiler output | Michael S | 2014/01/18 04:13 PM |
L0 cache coherency | David Kanter | 2014/01/11 07:39 PM |
Occam's razor | anon | 2014/01/09 04:12 AM |
Knights Landing L/S bandwidth | Eric Bron | 2014/01/08 09:46 AM |
Knights Landing L/S bandwidth | Michael S | 2014/01/08 10:23 AM |
Knights Landing L/S bandwidth | Nicolas Capens | 2014/01/08 01:02 PM |
Knights Landing L/S bandwidth | Michael S | 2014/01/08 01:29 PM |
Knights Landing L/S bandwidth | Eric Bron | 2014/01/08 01:54 PM |
Knights Landing L/S bandwidth | Michael S | 2014/01/08 02:00 PM |
Knights Landing L/S bandwidth | Eric Bron | 2014/01/08 02:13 PM |
Knights Landing L/S bandwidth | Michael S | 2014/01/08 02:28 PM |
Knights Landing L/S bandwidth | Eric Bron | 2014/01/08 02:32 PM |
Knights Landing L/S bandwidth | Michael S | 2014/01/08 02:40 PM |
Knights Landing L/S bandwidth | Eric Bron | 2014/01/08 02:51 PM |
Knights Landing L/S bandwidth | Michael S | 2014/01/09 11:18 AM |
Knights Landing L/S bandwidth | Patrick Chase | 2014/01/12 09:03 PM |
Also page/line splits? | David Kanter | 2014/01/12 09:50 PM |
Also page/line splits? | anon | 2014/01/13 12:44 AM |
Also page/line splits? | none | 2014/01/13 02:09 AM |
Also page/line splits? | anon | 2014/01/13 03:19 AM |
Knights Landing L/S bandwidth | Exophase | 2014/01/12 11:15 PM |
Knights Landing L/S bandwidth | anon | 2014/01/13 12:41 AM |
Knights Landing L/S bandwidth | Patrick Chase | 2014/01/13 10:14 AM |
Aliased writes | Nicolas Capens | 2014/01/14 08:46 PM |
Knights Landing L/S bandwidth | Ricardo B | 2014/01/07 03:27 PM |
Knights Landing L/S bandwidth | Nicolas Capens | 2014/01/07 09:28 PM |
Knights Landing L/S bandwidth | Ricardo B | 2014/01/08 01:13 AM |
Knights Landing L/S bandwidth | Eric Bron | 2014/01/08 10:10 AM |
Knights Landing L/S bandwidth | Nicolas Capens | 2014/01/08 02:31 PM |
Knights Landing L/S bandwidth | Ricardo B | 2014/01/08 02:58 PM |
Knights Landing L/S bandwidth | G. Gouvine | 2014/01/09 08:10 AM |
Knights Landing L/S bandwidth | Ricardo B | 2014/01/09 10:19 AM |
Efficient load queue vs. efficient L0 cache | Nicolas Capens | 2014/01/11 11:28 AM |
Efficient load queue vs. efficient L0 cache | G. Gouvine | 2014/01/13 01:11 AM |
Efficient load queue vs. efficient L0 cache | Michael S | 2014/01/13 02:43 AM |
Register file read port requirements | Nicolas Capens | 2014/01/10 11:55 PM |
Register file read port requirements | Ricardo B | 2014/01/11 04:24 AM |
Register file read port requirements | Eric Bron | 2014/01/11 04:32 AM |
Register file read port requirements | Michael S | 2014/01/11 08:57 AM |
Register file read port requirements | Eric Bron | 2014/01/11 10:16 AM |
Register file read port requirements | Michael S | 2014/01/11 10:46 AM |
Register file read port requirements | Eric Bron | 2014/01/11 11:12 AM |
Register file read port requirements | Michael S | 2014/01/11 11:36 AM |
Register file read port requirements | Eric Bron | 2014/01/11 11:51 AM |
Register file read port requirements | Patrick Chase | 2014/01/13 01:27 PM |
Register file read port requirements | Eric Bron | 2014/01/13 03:24 PM |
Register file read port requirements | Patrick Chase | 2014/01/13 05:02 PM |
Register file read port requirements | Eric Bron | 2014/01/14 03:50 AM |
Register file read port requirements | Michael S | 2014/01/14 10:36 AM |
Register file read port requirements | Eric Bron nli | 2014/01/14 12:04 PM |
Register file read port requirements | Patrick Chase | 2014/01/13 01:17 PM |
Register file read port requirements | Michael S | 2014/01/15 03:27 AM |
Register file read port requirements | Eric Bron | 2014/01/11 10:28 AM |
Register file read port requirements | Michael S | 2014/01/11 11:07 AM |
Register file read port requirements | Patrick Chase | 2014/01/13 01:40 PM |
Register file read port requirements | Patrick Chase | 2014/01/13 01:34 PM |
Register file read port requirements | Ricardo B | 2014/01/11 11:55 AM |
Register file read port requirements | Eric Bron | 2014/01/11 12:17 PM |
Register file read port requirements | Ricardo B | 2014/01/11 01:36 PM |
Register file read port requirements | Eric Bron | 2014/01/11 01:42 PM |
Register file read port requirements | Ricardo B | 2014/01/11 02:20 PM |
Register file read port requirements | Eric Bron | 2014/01/11 02:26 PM |
Register file read port requirements | Michael S | 2014/01/11 03:07 PM |
Register file read port requirements | Ricardo B | 2014/01/11 03:38 PM |
Register file read port requirements | Michael S | 2014/01/11 03:49 PM |
Register file read port requirements | Eric Bron | 2014/01/11 02:39 PM |
Register file read port requirements | Eric Bron | 2014/01/11 02:41 PM |
Register file read port requirements | Ricardo B | 2014/01/11 03:30 PM |
Register file read port requirements | Nicolas Capens | 2014/01/11 11:09 AM |
Knights Landing L/S bandwidth | anon | 2014/01/05 05:55 AM |
Knights Landing L/S bandwidth | Eric Bron | 2014/01/05 06:30 AM |
Knights Landing L/S bandwidth | anon | 2014/01/06 12:07 AM |
Knights Landing L/S bandwidth | Eric Bron | 2014/01/06 01:38 AM |
Knights Landing L/S bandwidth | anon | 2014/01/06 03:01 AM |
Knights Landing L/S bandwidth | Eric Bron | 2014/01/06 03:44 AM |
Knights Landing L/S bandwidth | anon | 2014/01/06 04:39 AM |
Knights Landing L/S bandwidth | Eric Bron | 2014/01/06 05:00 AM |
Knights Landing L/S bandwidth | anon | 2014/01/06 05:44 AM |
Knights Landing L/S bandwidth | Michael S | 2014/01/06 07:54 AM |
Knights Landing L/S bandwidth | Eric Bron | 2014/01/06 09:11 AM |
Knights Landing L/S bandwidth | Michael S | 2014/01/06 09:14 AM |
Knights Landing L/S bandwidth | Eric Bron | 2014/01/06 10:37 AM |
Knights Landing L/S bandwidth | Ricardo B | 2014/01/08 05:25 AM |
Knights Landing L/S bandwidth | Eric Bron | 2014/01/08 07:36 AM |
Knights Landing L/S bandwidth | Eric Bron | 2014/01/08 07:41 AM |
KNC code generator with EVEX back-end? | Michael S | 2014/01/08 08:43 AM |
KNC code generator with EVEX back-end? | Exophase | 2014/01/08 09:00 AM |
KNC code generator with EVEX back-end? | Ricardo B | 2014/01/08 10:39 AM |
KNC code generator with EVEX back-end? | Eric Bron | 2014/01/08 11:15 AM |
KNC code generator with EVEX back-end? | Exophase | 2014/01/08 12:17 PM |
KNC code generator with EVEX back-end? | Ricardo B | 2014/01/08 01:06 PM |
KNC code generator with EVEX back-end? | Exophase | 2014/01/08 01:24 PM |
KNC code generator with EVEX back-end? | Eric Bron | 2014/01/08 01:38 PM |
KNC code generator with EVEX back-end? | Michael S | 2014/01/08 12:54 PM |
KNC code generator with EVEX back-end? | Eric Bron | 2014/01/08 09:25 AM |
KNC code generator with EVEX back-end? | Eric Bron | 2014/01/08 09:35 AM |
KNC code generator with EVEX back-end? | Michael S | 2014/01/08 10:07 AM |
KNC code generator with EVEX back-end? | Eric Bron | 2014/01/08 10:24 AM |
KNC code generator with EVEX back-end? | Michael S | 2014/01/08 10:43 AM |
KNC code generator with EVEX back-end? | Eric Bron | 2014/01/08 12:23 PM |
KNC code generator with EVEX back-end? | Eric Bron | 2014/01/08 09:43 AM |
AVX2 code much different than AVX-512 | Eric Bron | 2014/01/08 07:52 AM |
evil question | hobold | 2014/01/08 09:22 AM |
evil question | Eric Bron | 2014/01/08 09:27 AM |
evil question | hobold | 2014/01/08 01:33 PM |
evil question | Michael S | 2014/01/08 01:37 PM |
stupid question (was: evil question) | hobold | 2014/01/09 04:41 AM |
stupid question (was: evil question) | Eric Bron | 2014/01/09 04:52 AM |
stupid question (was: evil question) | Michael S | 2014/01/09 07:00 AM |
stupid question (was: evil question) | Michael S | 2014/01/09 07:12 AM |
stupid question (was: evil question) | Eric Bron | 2014/01/09 09:47 AM |
stupid question (was: evil question) | Michael S | 2014/01/09 10:48 AM |
more decisive (hopefully) test case | Michael S | 2014/01/09 11:01 AM |
more decisive (hopefully) test case | Eric Bron | 2014/01/09 11:08 AM |
more decisive (hopefully) test case | Michael S | 2014/01/09 11:24 AM |
more decisive (hopefully) test case | Eric Bron | 2014/01/09 11:27 AM |
more decisive (hopefully) test case | Michael S | 2014/01/09 11:33 AM |
AVX2 | Eric Bron | 2014/01/09 11:14 AM |
AVX2 | Michael S | 2014/01/09 11:30 AM |
AVX2 | Eric Bron | 2014/01/09 11:40 AM |
another try | Michael S | 2014/01/09 02:02 PM |
another try | Eric Bron | 2014/01/09 02:33 PM |
another try | Michael S | 2014/01/09 03:20 PM |
another try - ignore misformated mess above | Michael S | 2014/01/09 03:24 PM |
another try - ignore misformated mess above | Gabriele Svelto | 2014/01/10 12:01 AM |
another try - ignore misformated mess above | Eric Bron | 2014/01/10 02:05 AM |
another try - ignore misformated mess above | Michael S | 2014/01/11 09:23 AM |
another try - ignore misformated mess above | Eric Bron | 2014/01/11 10:08 AM |
another try - ignore misformated mess above | Michael S | 2014/01/11 11:09 AM |
another try - ignore misformated mess above | Michael S | 2014/01/11 11:12 AM |
another try - ignore misformated mess above | Eric Bron | 2014/01/11 11:24 AM |
another try - ignore misformated mess above | Michael S | 2014/01/11 12:24 PM |
another try - ignore misformated mess above | Eric Bron | 2014/01/11 01:11 PM |
another try - ignore misformated mess above | Michael S | 2014/01/11 01:18 PM |
another try - ignore misformated mess above | Eric Bron | 2014/01/11 01:27 PM |
another try - ignore misformated mess above | Michael S | 2014/01/11 01:29 PM |
another try - ignore misformated mess above | Eric Bron | 2014/01/11 01:46 PM |
another try - ignore misformated mess above | Eric Bron | 2014/01/11 01:46 PM |
another try - ignore misformated mess above | Michael S | 2014/01/11 02:28 PM |
another try - ignore misformated mess above | Eric Bron | 2014/01/11 01:17 PM |
another try - ignore misformated mess above | Michael S | 2014/01/11 01:24 PM |
KNC version | Michael S | 2014/01/11 04:19 PM |
KNC version | Eric Bron nli | 2014/01/12 01:59 AM |
KNC version | Gabriele Svelto | 2014/01/12 08:06 AM |
evil question | Eric Bron | 2014/01/08 01:41 PM |
Knights Landing L/S bandwidth | Patrick Chase | 2014/01/05 10:20 PM |
Knights Landing L/S bandwidth | Eric Bron | 2014/01/06 01:45 AM |
Knights Landing L/S bandwidth | anon | 2014/01/06 03:12 AM |
Knights Landing L/S bandwidth | Michael S | 2014/01/06 03:17 AM |
Knights Landing L/S bandwidth | anon | 2014/01/06 04:20 AM |
Knights Landing L/S bandwidth | Nicolas Capens | 2014/01/04 04:34 PM |
Knights Landing L/S bandwidth | Eric Bron | 2014/01/04 04:44 PM |
Knights Landing L/S bandwidth | Nicolas Capens | 2014/01/05 11:25 AM |
Knights Landing L/S bandwidth | Eric Bron | 2014/01/05 12:50 PM |
Knights Landing L/S bandwidth | Nicolas Capens | 2014/01/05 02:34 PM |
Might even help with gather | Nicolas Capens | 2014/01/05 02:40 PM |
What is an L0 cache? | David Kanter | 2014/01/05 09:44 PM |
What is an L0 cache? | anon | 2014/01/06 04:57 AM |
What is an L0 cache? | Nicolas Capens | 2014/01/06 11:57 AM |
What is an L0 cache? | anon | 2014/01/06 01:18 PM |
Knights Landing L/S bandwidth | David Kanter | 2014/01/04 09:58 AM |
Knights Landing L/S bandwidth | Nicolas Capens | 2014/01/04 03:24 PM |
Knights Landing L/S bandwidth | Eric Bron | 2014/01/04 03:46 PM |
Knights Landing L/S bandwidth | Konrad Schwarz | 2014/01/07 11:48 PM |
Knights Landing L/S bandwidth | Michael S | 2014/01/08 01:45 AM |
Knights Landing L/S bandwidth | David Kanter | 2014/01/05 12:44 AM |
Knights Landing L/S bandwidth | Eric Bron | 2014/01/05 02:55 AM |
Knights Landing L/S bandwidth | Nicolas Capens | 2014/01/05 11:18 AM |
Knights Landing L/S bandwidth | Maynard Handley | 2014/01/05 10:33 PM |
Knights Landing L/S bandwidth | Eric Bron | 2014/01/06 03:02 AM |
Knights Landing L/S bandwidth | Michael S | 2014/01/06 03:23 AM |
Knights Landing L/S bandwidth | Eric Bron | 2014/01/06 03:35 AM |
Knights Landing L/S bandwidth | Michael S | 2014/01/06 04:20 AM |
Knights Landing L/S bandwidth | Michael S | 2014/01/06 04:32 AM |
Knights Landing L/S bandwidth | Eric Bron | 2014/01/06 04:36 AM |
Knights Landing L/S bandwidth | Michael S | 2014/01/06 05:00 AM |
Knights Landing L/S bandwidth | Eric Bron | 2014/01/06 05:07 AM |
Knights Landing L/S bandwidth | Eric Bron | 2014/01/06 05:14 AM |
edits | Eric Bron | 2014/01/06 05:22 AM |
optimized version | Eric Bron | 2014/01/06 05:35 AM |
yet more optimized version | Eric Bron | 2014/01/06 05:42 AM |
latest version for today | Eric Bron | 2014/01/06 05:51 AM |
Probably just L2 bandwith limited | Nicolas Capens | 2014/01/06 10:48 AM |
yet more optimized version | Maynard Handley | 2014/01/06 05:54 PM |
optimized version | Maynard Handley | 2014/01/06 05:52 PM |
optimized version | Michael S | 2014/01/07 09:42 AM |
optimized version | Nicolas Capens | 2014/01/07 11:36 AM |
optimized version | Michael S | 2014/01/07 02:41 PM |
optimized version | Nicolas Capens | 2014/01/07 09:52 PM |
optimized version | Michael S | 2014/01/08 01:10 AM |
optimized version | Eric Bron | 2014/01/07 01:34 PM |
optimized version | Michael S | 2014/01/07 02:18 PM |
optimized version | Eric Bron | 2014/01/07 02:30 PM |
optimized version | Eric Bron | 2014/01/07 02:33 PM |
optimized version | Michael S | 2014/01/07 02:57 PM |
optimized version | Maynard Handley | 2014/01/07 05:50 PM |
optimized version | Michael S | 2014/01/08 01:39 AM |
Knights Landing L/S bandwidth | Maynard Handley | 2014/01/06 05:47 PM |
Knights Landing L/S bandwidth | Nicolas Capens | 2014/01/06 08:18 AM |
Knights Landing L/S bandwidth | Maynard Handley | 2014/01/06 05:56 PM |
Knights Landing L/S bandwidth | Nicolas Capens | 2014/01/07 11:18 AM |
Knights Landing L/S bandwidth | NoSpammer | 2014/01/05 12:15 PM |
Knights Landing L/S bandwidth | Nicolas Capens | 2014/01/05 02:06 PM |
Knights Landing L/S bandwidth | NoSpammer | 2014/01/06 03:20 AM |
Knights Landing L/S bandwidth | Nicolas Capens | 2014/01/06 10:54 AM |
Knights Landing L/S bandwidth | NoSpammer | 2014/01/06 12:24 PM |
Knights Landing L/S bandwidth | Nicolas Capens | 2014/01/06 08:15 PM |
Knights Landing L/S bandwidth | NoSpammer | 2014/01/07 02:58 AM |
Knights Landing L/S bandwidth | Nicolas Capens | 2014/01/07 02:18 PM |
Knights Landing L/S bandwidth | NoSpammer | 2014/01/08 12:38 PM |
Knights Landing L/S bandwidth | Nicolas Capens | 2014/01/08 10:14 PM |
AVX512F question | Michael S | 2014/01/06 09:18 AM |
AVX512F question | Nicolas Capens | 2014/01/06 11:01 AM |
Knights Landing - time for obituary? | Michael S | 2018/07/31 02:00 PM |
Knights Landing - time for obituary? | Adrian | 2018/07/31 08:24 PM |
Knights Landing - time for obituary? | SoftwareEngineer | 2018/08/01 01:15 AM |
auto-vectorization is a dead end | Michael S | 2018/08/01 02:48 AM |
Auto-vectorization of random C is a dead end | Mark Roulo | 2018/08/01 10:07 AM |
Auto-vectorization of random C is a dead end | Passing Through | 2018/08/01 12:35 PM |
Auto-vectorization of random C is a dead end | David Kanter | 2018/08/01 09:44 PM |
Auto-vectorization of random C is a dead end | Passing Through | 2018/08/02 12:51 AM |
Auto-vectorization of random C is a dead end | SoftwareEngineer | 2018/08/02 12:19 AM |
Auto-vectorization of random C is a dead end | Mark Roulo | 2018/08/02 08:50 AM |
Auto-vectorization of random C is a dead end | Michael S | 2018/08/02 11:11 AM |
Auto-vectorization of random C is a dead end | j | 2018/08/02 10:37 PM |
Auto-vectorization of random C is a dead end | Michael S | 2018/08/03 02:50 AM |
Auto-vectorization of random C is a dead end | rwessel | 2018/08/03 10:06 PM |
Auto-vectorization of random C is a dead end | Ricardo B | 2018/08/03 03:20 AM |
Auto-vectorization of random C is a dead end | Michael S | 2018/08/03 04:37 AM |
Auto-vectorization of random C is a dead end | Ricardo B | 2018/08/03 10:22 AM |
Auto-vectorization of random C is a dead end | Travis | 2018/08/03 06:58 PM |
Potential way to autovectorization in the future. | Jouni Osmala | 2018/08/03 09:22 PM |
Potential way to autovectorization in the future. | Jukka Larja | 2018/08/04 03:03 AM |
Potential way to autovectorization in the future. | Passing Through | 2018/08/04 05:47 AM |
Potential way to autovectorization in the future. | Travis | 2018/08/04 12:50 PM |
Potential way to autovectorization in the future. | Michael S | 2018/08/04 01:33 PM |
Potential way to autovectorization in the future. | Travis | 2018/08/04 01:48 PM |
Potential way to autovectorization in the future. | Passing Through | 2018/08/04 01:58 PM |
Skylake server/client AVX PRF speculation | Jeff S. | 2018/08/04 04:42 PM |
Skylake server/client AVX PRF speculation | anonymou5 | 2018/08/04 05:21 PM |
Skylake server/client AVX PRF speculation | Jeff S. | 2018/08/04 05:38 PM |
Skylake server/client AVX PRF speculation | anonymou5 | 2018/08/04 06:45 PM |
Skylake server/client AVX PRF speculation | Jeff S. | 2018/08/04 07:08 PM |
Skylake server/client AVX PRF speculation | anonymou5 | 2018/08/04 07:18 PM |
Skylake server/client AVX PRF speculation | Nomad | 2018/08/05 10:10 PM |
Skylake server/client AVX PRF speculation | anonymou5 | 2018/08/06 11:14 AM |
Skylake server/client AVX PRF speculation | Travis | 2018/08/06 07:43 PM |
Skylake server/client AVX PRF speculation | Travis | 2018/08/06 07:39 PM |
Auto-vectorization of random C is a dead end | Brett | 2018/08/04 12:55 PM |
Auto-vectorization of random C is a dead end | Travis | 2018/08/04 01:38 PM |
Auto-vectorization of random C is a dead end | Passing Through | 2018/08/04 02:00 PM |
New record for shortest post by Ireland - AI crashed? (NT) | Travis | 2018/08/04 02:34 PM |
New record for shortest post by Ireland - AI crashed? | Passing Through | 2018/08/04 03:12 PM |
New record for shortest post by Ireland - AI crashed? | anonymou5 | 2018/08/04 05:00 PM |
New record for shortest post by Ireland - AI crashed? | Brett | 2018/08/04 05:40 PM |
New record for shortest post by Ireland - AI crashed? | anonymou5 | 2018/08/04 06:38 PM |
Auto-vectorization of random C is a dead end | noko | 2018/08/04 08:46 PM |
The story of ispc (a 12 entry blog series) | Simon Farnsworth | 2018/08/01 02:50 AM |
the 1st link is empty (NT) | Michael S | 2018/08/01 03:05 AM |
the 1st link is empty | Simon Farnsworth | 2018/08/01 05:42 AM |
Interesting read, thanks! (NT) | SoftwareEngineer | 2018/08/01 05:57 AM |
Amazing read | Laurent | 2018/08/01 08:00 AM |
Amazing read | Passing Through | 2018/08/01 12:13 PM |
Amazing read | Doug S | 2018/08/01 01:30 PM |
Amazing read | Passing Through | 2018/08/01 01:49 PM |
ISPC vs OpenCL? | j | 2018/08/02 10:41 PM |
ISPC vs OpenCL? | coppcie | 2018/08/03 02:55 AM |
ISPC vs OpenCL? | Passing Through | 2018/08/03 03:07 AM |
Go away | Forum Reader | 2018/08/03 07:11 AM |
ISPC vs OpenCL? | Gian-Carlo Pascutto | 2018/09/11 05:50 AM |
ISPC vs OpenCL? | SoftwareEngineer | 2018/08/03 03:18 AM |
Knights Landing - time for obituary? | Kevin G | 2018/08/01 06:14 AM |
Knights Landing - time for obituary? | SoftwareEngineer | 2018/08/01 06:29 AM |
Knights Landing - time for obituary? | Passing Through | 2018/08/01 06:38 AM |
Knights Landing - time for obituary? | Eric Bron | 2018/08/02 05:57 AM |
Knights Landing - time for obituary? | Passing Through | 2018/08/02 11:29 AM |
Knights Landing - time for obituary? | Eric Bron | 2018/08/02 12:49 PM |
Knights Landing - time for obituary? | Passing Through | 2018/08/02 01:17 PM |
chess algorithms vs, low level optimizations | Eric Bron | 2018/08/02 06:15 AM |
AlphaZero vs Stockfish | Michael S | 2018/08/02 06:55 AM |
AlphaZero vs Stockfish | Eric Bron | 2018/08/02 07:24 AM |
AlphaZero vs Stockfish | Michael S | 2018/08/02 08:01 AM |
AlphaZero vs Stockfish | Eric Bron | 2018/08/02 08:11 AM |
Leela 4th vs all others | Eric Bron nli | 2018/09/11 02:40 AM |
AlphaZero vs Stockfish | Gian-Carlo Pascutto | 2018/09/11 05:31 AM |
AlphaZero vs Stockfish | Eric Bron | 2018/09/11 08:26 AM |
AlphaZero vs Stockfish | Eric Bron | 2018/09/11 08:58 AM |
AlphaZero vs Stockfish | Per Hesselgren | 2018/12/31 09:04 AM |
Leela Chess Zero | Per Hesselgren | 2018/12/31 11:00 AM |
AlphaZero vs Stockfish (on Xeon) | Per Hesselgren | 2018/12/31 08:59 AM |
C/C++ and vector/parallel/distributed | RichardC | 2018/08/02 04:50 AM |
Knights Landing - time for obituary? | Passing Through | 2018/08/01 06:52 AM |
Knights Landing - time for obituary? | Kevin G | 2018/08/01 01:03 PM |
Knights Landing - time for obituary? | Passing Through | 2018/08/01 01:33 PM |
Knights Landing - time for obituary? | Kevin G | 2018/08/01 07:26 AM |
Knights Landing - time for obituary? | Kevin G | 2018/08/01 07:26 AM |
Knights Landing - time for obituary? | juanrga | 2018/08/01 01:26 PM |
Knights Landing - time for obituary? | hobel | 2018/08/02 04:46 AM |
Knights Landing - time for obituary? | juanrga | 2018/07/31 10:25 PM |
Right, time for obituary for whole LRB lineage | AM | 2018/08/02 10:46 AM |
Right, time for obituary for whole LRB lineage | Adrian | 2018/08/02 10:46 PM |
LRBNI, AVX512, etc... | Michael S | 2018/08/03 04:23 AM |
Right, time for obituary for whole LRB lineage | juanrga | 2018/08/03 03:11 AM |