From: Joe Landman <joe.landman@gmail.com>
To: Sage Weil <sweil@redhat.com>
Cc: Thorsten Behrens <tbehrens@suse.com>, ceph-devel@vger.kernel.org
Subject: Re: crush: straw is dead, long live straw2
Date: Fri, 12 Dec 2014 11:39:08 -0500 [thread overview]
Message-ID: <548B1A2C.2050605@gmail.com> (raw)
In-Reply-To: <alpine.DEB.2.00.1412120814050.23559@cobra.newdream.net>
On 12/12/2014 11:20 AM, Sage Weil wrote:
>
> We can't use floating point. The code needs to run in the kernel. We also
> need the rseults to be perfectly deterministic and consistent across all
> architectures; I'm not sure if all floating point implementations (and log
> implementations) will do that?
Nope ... that is a whole different subject. Ok, why not start looking
at what some of the GFX folks do?
https://graphics.stanford.edu/~seander/bithacks.html#IntegerLog
next prev parent reply other threads:[~2014-12-12 16:39 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-12-08 23:48 crush: straw is dead, long live straw2 Sage Weil
2014-12-09 0:21 ` Josh Durgin
2014-12-12 9:14 ` Thorsten Behrens
2014-12-12 14:46 ` Sage Weil
2014-12-12 15:39 ` Joe Landman
2014-12-12 16:20 ` Sage Weil
2014-12-12 16:39 ` Joe Landman [this message]
2014-12-12 18:18 ` Joe Landman
2014-12-12 21:29 ` Sage Weil
2014-12-12 15:43 ` Milosz Tanski
2014-12-12 17:27 ` Yehuda Sadeh
2014-12-12 21:42 ` Mark Nelson
2017-01-27 0:26 ` Loic Dachary
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