| Re: [eigen] Back from google |
[ Thread Index |
Date Index
| More lists.tuxfamily.org/eigen Archives
]
- To: eigen@xxxxxxxxxxxxxxxxxxx
- Subject: Re: [eigen] Back from google
- From: Rohit Garg <rpg.314@xxxxxxxxx>
- Date: Wed, 4 Nov 2009 16:05:05 +0530
- Dkim-signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:mime-version:received:in-reply-to:references :from:date:message-id:subject:to:content-type; bh=D1Ii15+cVxp5E8Dl+w8ccjb0XzCxE/teh3aw6pmsunE=; b=jccEFygFLM3qeyp7jxgsrw2J3069FjSSwQLVzjlqz0RoVDCHp3Wvxv62opZlKDnqZ/ +hz7SeFLRwj/Ovl7VlyzLiVYEB3WtnAjrpj9uTOm5nxTeLaAC705+QXL7tHC2GDSc/OX g2WvmCTVBgXq1NytyZ9a0yAgu+I7N2v6pnj5s=
- Domainkey-signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=mime-version:in-reply-to:references:from:date:message-id:subject:to :content-type; b=bFabh8A3ZBW8Bse7PFPkSZs8hWThNKLKiVa63RWEXWknjy8rI8rA1Xp8EhCN7lRnx2 EnlRuzVOcw67cX8M/WZl6PGiJv667w8Ve5gJ497LQOKgq5C6fhae3LvX9x5M2TS/yADm emu0IToXgbyEP1rRQaxXAOe6ZNeXoMD9r3g6g=
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.
>>
>> Benoit
>>
>> > Keir
>> >>
>> >>
>> >> Benoit
>> >>
>> >>
>> >
>> >
>>
>>
>
>
--
Rohit Garg
http://rpg-314.blogspot.com/
Senior Undergraduate
Department of Physics
Indian Institute of Technology
Bombay