Bug 798503

Summary:	[FEAT] need more details of 'dict' allocation patterns
Product:	[Community] GlusterFS	Reporter:	Amar Tumballi <amarts>
Component:	core	Assignee:	Amar Tumballi <amarts>
Status:	CLOSED CURRENTRELEASE	QA Contact:	Raghavendra Bhat <rabhat>
Severity:	medium	Docs Contact:
Priority:	medium
Version:	mainline	CC:	gluster-bugs, vraman
Target Milestone:	---
Target Release:	---
Hardware:	Unspecified
OS:	Unspecified
Whiteboard:
Fixed In Version:	glusterfs-3.4.0	Doc Type:	Bug Fix
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2013-07-24 17:52:33 UTC	Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:	glusterfs-3.3.0qa43	Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:
Bug Depends On:
Bug Blocks:	817967

Description Amar Tumballi 2012-02-29 05:12:06 UTC

Description of problem:
Dictionary is a heavily used data-structure in glusterfs, and knowing its usage patterns will enable us to bring in some enhancements regarding performance.

Once easy way would be to utilize the mempool for dict allocations.

Version-Release number of selected component (if applicable):
upstream

Comment 1 Anand Avati 2012-03-15 05:15:31 UTC

CHANGE: http://review.gluster.com/2851 (core: dict allocations through mem-pool) merged in master by Vijay Bellur (vijay)

Comment 2 Raghavendra Bhat 2012-05-24 09:47:09 UTC

Now dictionary is allocated from the mempool. Information about dict usage can be obtained from statedump of the process. Checked with glusterfs-3.3.0qa43.


pool-name=glusterfs:data_t
hot-count=75
cold-count=16309
padded_sizeof=52
alloc-count=2451087
max-alloc=211
pool-misses=0
max-stdalloc=0
-----=-----
pool-name=glusterfs:data_pair_t
hot-count=122
cold-count=16262
padded_sizeof=68
alloc-count=2730070
max-alloc=268
pool-misses=0
max-stdalloc=0
-----=-----
pool-name=glusterfs:dict_t
hot-count=43
cold-count=4053
padded_sizeof=84
alloc-count=537697
max-alloc=73
pool-misses=0
max-stdalloc=0