From wkwu@csie.nctu.edu.tw  Sun Nov  7 17:36:36 2004
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Message-Id: <200411071736.iA7Hablu089473@mailgate.csie.nctu.edu.tw>
Date: Mon, 8 Nov 2004 01:36:37 +0800 (CST)
From: Wei-Kai Wu <wkwu@csie.nctu.edu.tw>
Reply-To: Wei-Kai Wu <wkwu@csie.nctu.edu.tw>
To: FreeBSD-gnats-submit@freebsd.org
Cc:
Subject: I/O performance: with/without MEMIO option
X-Send-Pr-Version: 3.113
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>Number:         73646
>Category:       kern
>Synopsis:       [ahd] I/O performance: with/without MEMIO option
>Confidential:   no
>Severity:       non-critical
>Priority:       low
>Responsible:    freebsd-bugs
>State:          closed
>Quarter:        
>Keywords:       
>Date-Required:  
>Class:          change-request
>Submitter-Id:   current-users
>Arrival-Date:   Sun Nov 07 17:40:16 GMT 2004
>Closed-Date:    Sun Feb 24 15:48:33 UTC 2008
>Last-Modified:  Sun Feb 24 15:48:33 UTC 2008
>Originator:     Wei-Kai Wu
>Release:        FreeBSD 5.2.1-RELEASE amd64
>Organization:
Kavalan
>Environment:
AHA aic7892/7899
AHA aic7901/7902
LSI 1030 Ultra4 Adapter
>Description:
We ran more than 20000 processes concurrently. Each process requests for
random disk I/O for small files. (reading/writing)

With AHA aic7892/7899 (AHC_ALLOW_MEMIO enabled), the system works well.

With AHA aic7901/7902 (use "ahd" driver), the system works bad.
The console hangs frequently. Each process hangs frequently.

With LSI 1030 (mpt driver), the system works soso.
>How-To-Repeat:
>Fix:
>Release-Note:
>Audit-Trail:
Responsible-Changed-From-To: freebsd-advocacy->freebsd-bugs 
Responsible-Changed-By: ceri 
Responsible-Changed-When: Mon Nov 8 11:41:20 GMT 2004 
Responsible-Changed-Why:  
Not an advocacy PR. 

http://www.freebsd.org/cgi/query-pr.cgi?pr=73646 

From: Volker <volker@vwsoft.com>
To: bug-followup@FreeBSD.org, wkwu@csie.nctu.edu.tw
Cc:  
Subject: Re: kern/73646: [ahd] I/O performance: with/without MEMIO option
Date: Fri, 22 Feb 2008 22:07:50 +0100

 Wei-Kai,
 
 I'm wondering if you've been able to repeat your stress test with a
 later FreeBSD release and have seen a better performance behavior?
 
 If so, please report back if we can close this PR.
 
 Thanks!
State-Changed-From-To: open->feedback 
State-Changed-By: linimon 
State-Changed-When: Sat Feb 23 03:10:07 UTC 2008 
State-Changed-Why:  
Note that submitter has been asked for feedback. 

http://www.freebsd.org/cgi/query-pr.cgi?pr=73646 

From: James <wkwu.mutt@csie.nctu.edu.tw>
To: bug-followup@FreeBSD.org
Cc:  
Subject: Re: kern/73646: [ahd] I/O performance: with/without MEMIO option
Date: Sun, 24 Feb 2008 21:55:03 +0800

 Dear Volker,
 
 I have no such environment to continue the stress test.
 
 Please close the PR, thanks!
State-Changed-From-To: feedback->closed 
State-Changed-By: remko 
State-Changed-When: Sun Feb 24 15:48:32 UTC 2008 
State-Changed-Why:  
Submitter reports this can be closed. Make it happen 

http://www.freebsd.org/cgi/query-pr.cgi?pr=73646 
>Unformatted:
