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

-- 
Matt Benjamin
CohortFS, LLC.
206 South Fifth Ave. Suite 150
Ann Arbor, MI  48104

http://cohortfs.com

tel.  734-761-4689 
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