Re: kern/45734 (performance regression for sequential/random creation of files, as well as stat(2) (ffs fs))

[Jean-Yves Migeon <jeanyves.migeon%free.fr@localhost>]

The following reply was made to PR kern/45734; it has been noted by GNATS.

From: Jean-Yves Migeon <jeanyves.migeon%free.fr@localhost>
To: gnats-bugs%NetBSD.org@localhost
Cc: dholland%NetBSD.org@localhost, kern-bug-people%netbsd.org@localhost, 
 netbsd-bugs%netbsd.org@localhost, gnats-admin%netbsd.org@localhost, 
jym%NetBSD.org@localhost
Subject: Re: kern/45734 (performance regression for sequential/random creation
 of files, as well as stat(2) (ffs fs))
Date: Tue, 03 Jan 2012 21:24:39 +0100

 On 03.01.2012 15:48, dholland%NetBSD.org@localhost wrote:
 > Synopsis: performance regression for sequential/random creation of files, as 
 > well as stat(2) (ffs fs)
 >
 > State-Changed-From-To: closed->open
 > State-Changed-By: dholland%NetBSD.org@localhost
 > State-Changed-When: Tue, 03 Jan 2012 14:48:29 +0000
 > State-Changed-Why:
 > I don't agree - a 3x performance degradation from DIAGNOSTIC (even on a
 > naive benchmark) is not acceptable.
 
 Beware, it's a 3x performance degradation on specific operations (file 
 creation/deletion), the degradation is non existent for other type of 
 benchmarks (at least regarding bonnie++, build.sh or sysbench).
 
 > Are you in a position to check where it's coming from?
 
 Not ATM. My spare time is limited right now and I'd prefer to focus on 
 my Xen work first.
 
 -- 
 Jean-Yves Migeon
 jeanyves.migeon%free.fr@localhost