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- To: eigen@xxxxxxxxxxxxxxxxxxx
- Subject: Re: [eigen] Back from google
- From: Rohit Garg <rpg.314@xxxxxxxxx>
- Date: Wed, 4 Nov 2009 16:05:05 +0530
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On Wed, Nov 4, 2009 at 2:38 PM, Keir Mierle <mierle@xxxxxxxxx> wrote:
> I don't know the details, but I believe the cache is yours until the next
> context switch.
Only for single threaded apps. For multi-threaded apps, if the no. of
active threads matches the number of hw threads, then it is ok,
otherwise it'll naturally trash cache.
>> > It's extra maintenance, but
>> > going forward it may be required if we wish Eigen to get used in
>> > prebuilt
>> > software. For example, consider packages depending on Eigen compiled for
>> > debian, or libmv when eventually bundled with blender.
>> I do understand that the current solution of having the cache size
>> known at build time, is not satisfactory :)
>> > There was another item brought up by a Googler, who couldn't make lunch,
>> > which was that there aren't any benchmarks on the wiki comparing sparse
>> > performance. It would be nice if the benchmark suite included
>> > comparisons
>> > against, e.g. gmm++ and ublas. I realize most of the solvers are
>> > implemented
>> > by other backends, but things like sparse matrix multiplication is still
>> > done natively.
>> ---> that would be nice indeed! And an accessible "junior job" for
>> someone wanting to contribute! The next question is if that can be
>> done in BTL, that i dont know.
>> > Thanks for joining us for lunch!
>> Thanks a ton for the invitation!
>> Everyone: Google offices are up to their reputation, the place is a
>> sort of hacker paradise with palm trees, free food, and technical chat
>> all over the place, from what i could see.
>> > Keir
>> >> Benoit
Department of Physics
Indian Institute of Technology