Re: [cryptography] 5x speedup for AES using SSE5?

2008-08-26 Thread Eric Young
Hovav Shacham wrote: > On Aug 24, 2008, at 5:20 AM, Peter Gutmann wrote: > >> Speaking of CPU-specific optimisations, I've seen a few algorithm >> proposals >> from the last few years that assume that an algorithm can be scaled >> linearly >> in the number of CPU cores, treating a multicore CPU as

Re: [cryptography] 5x speedup for AES using SSE5?

2008-08-25 Thread Hovav Shacham
On Aug 24, 2008, at 5:20 AM, Peter Gutmann wrote: Speaking of CPU-specific optimisations, I've seen a few algorithm proposals from the last few years that assume that an algorithm can be scaled linearly in the number of CPU cores, treating a multicore CPU as some kind of SIMD engine with al

Re: [cryptography] 5x speedup for AES using SSE5?

2008-08-25 Thread Kevin Brock
Peter Gutmann wrote: Is there some feature of multicore CPUs that I'm missing, or is it a case of cryptographers abstracting a bit too much away? And if it's the latter, should someone tell them that multicore CPUs don't actually work that way? I can't speak to the former issue, but I seem to

Re: [cryptography] 5x speedup for AES using SSE5?

2008-08-24 Thread Peter Gutmann
Speaking of CPU-specific optimisations, I've seen a few algorithm proposals from the last few years that assume that an algorithm can be scaled linearly in the number of CPU cores, treating a multicore CPU as some kind of SIMD engine with all cores operating in lock-step, or at least engaging in so

Re: [cryptography] 5x speedup for AES using SSE5?

2008-08-24 Thread Eric Young
Paul Crowley wrote: > http://www.ddj.com/hpc-high-performance-computing/201803067 > > In the above Dr Dobb's article from a little over a year ago, AMD > Senior Fellow Leendert vanDoorn states "the Advanced Encryption > Standard (AES) algorithm gets a factor of 5 performance improvement by > using