Re: ceph performance call: buffer

["Matt W. Benjamin" <matt@cohortfs.com>]

Ack, very interested in that :).

Matt

----- "Loic Dachary" <loic@dachary.org> wrote:

> Hi Again,
> 
> On 16/10/2014 11:16, Loic Dachary wrote:
> > Hi Matt,
> > 
> > You will probably be interested in
> 
> (I have to find which sequence of keys send out the mail by
> accident... :-)
> 
> https://github.com/ceph/ceph/pull/2595
> 
> and
> 
> https://github.com/dachary/ceph/commit/734e555c640a3b5e9bbf0329bd524cffaca61c4f
> 
> in particular. It does not do anything performance wise but it's going
> to be merged in the not-to-distant future.
> 
> Cheers
> 
> > 
> > On 16/10/2014 11:00, Matt W. Benjamin wrote:
> >> Hi Folks,
> >>
> >> Per yesterday's Ceph performance call, we've pushed 2 wip branches
> for review and feedback to
> https://github.com/linuxbox2/linuxbox-ceph.git .
> >>
> >> 1. xio-v084-inline reorganizes ceph::buffer as a namespace, and
> (nearly) all of
> >> buffer::hash, buffer::ptr and buffer::list as inline
> >>
> >> 2. xio-v084-inline-flat restores some raw encapsulation lost in the
> prior change,
> >> then refactors buffer::raw to remove virtual methods
> >>
> >> We've made some effort to measure the impact of the changes, but
> don't have
> >> reliable data yet.  (It's possible that our initial impression of
> improvement from the inlining change was not accurate, but more likely
> we need better workload tests.)
> >>
> >> In addition, we've been working on an experiment to refactor
> buffer::ptr and buffer::raw to use boost::intrusive::list, to unify
> the interfaces of the two types to permit interning buffer::raw
> directly on the containing list when there is no sharing, and a slab
> allocator for both types.  We plan to push a wip branch with these
> changes to when they've stabilized a bit more and/or we have real perf
> numbers.
> >>
> >> Thanks,
> >>
> >> Matt
> >>
> > 
> 
> -- 
> Loïc Dachary, Artisan Logiciel Libre

-- 
Matt Benjamin
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