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Re: FW: ITS#2183 IDL stack slab





By and large the test008 numbers look consistent with the numbers I got.
I tested its performance with the messaging, addressing, and messaging-add
mixed
scenarios of the DirectoryMark benchmark toolset of Mindcraft.
What was the ratio of read to write in the test008 mixed test run ?
- Jong

------------------------
Jong Hyuk Choi
IBM Thomas J. Watson Research Center - Enterprise Linux Group
P. O. Box 218, Yorktown Heights, NY 10598
email: jongchoi@us.ibm.com
(phone) 914-945-3979    (fax) 914-945-4425   TL: 862-3979


"Howard Chu" <hyc@highlandsun.com>@OpenLDAP.org on 12/10/2002 12:09:13 PM

Sent by:    owner-openldap-devel@OpenLDAP.org


To:    <openldap-devel@OpenLDAP.org>
cc:
Subject:    FW: ITS#2183 IDL stack slab



This patch has quite a dramatic effect. In a test with only read
operations,
test008 run time drops from ~5.6 seconds to ~5.1 seconds. In a test with
read/write mix, the test008 runtime drops from ~22 seconds to as fast as
~11
seconds. At the moment the buffer size is hardcoded at 16 but again, we may
want to make it configurable by a config keyword.

  -- Howard Chu
  Chief Architect, Symas Corp.       Director, Highland Sun
  http://www.symas.com               http://highlandsun.com/hyc
  Symas: Premier OpenSource Development and Support

-----Original Message-----
From: owner-openldap-bugs@OpenLDAP.org
[mailto:owner-openldap-bugs@OpenLDAP.org]On Behalf Of
hyc@highlandsun.com
Sent: Tuesday, December 10, 2002 8:12 AM
To: openldap-its@OpenLDAP.org
Subject: ITS#2183 IDL stack slab


Thinking about this some more; it can be greatly simplified. Instead of
having a sequence of buckets of increasing length, just use a single
fixed-size buffer per thread. This would also avoid the need for any
locking
on the structures. (See the use of ldap_pvt_thread_pool_getkey/setkey in
cache.c.) I can code this up pretty quickly for a test.

  -- Howard Chu
  Chief Architect, Symas Corp.       Director, Highland Sun
  http://www.symas.com               http://highlandsun.com/hyc
  Symas: Premier OpenSource Development and Support