IO schedulers in FBSD...

2005-09-15 Thread Pranav Peshwe
Hello,
Which is the I/O scheduler used by FBSD 5.4 ? 
I googled in various ways but could not get an answer.
I do not have access to the source code.

TIA.

Sincere regards,
Pranav.J.Peshwe

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A formula is worth a thousand pictures.
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Re: IO schedulers in FBSD...

2005-09-15 Thread Luigi Rizzo
On Thu, Sep 15, 2005 at 06:45:27PM +0530, Pranav Peshwe wrote:
 Hello,
 Which is the I/O scheduler used by FBSD 5.4 ? 
 I googled in various ways but could not get an answer.

it is called FCFSUSIIABPIWCTTOIS, which stands for
First Come First Serve Unless Someone Is In A Better Position
In Which Case The Temporal Order Is Subverted

also known as the standard one-way elevator taught in all operating
system courses.

 I do not have access to the source code.

you do, it is at

http://www.freebsd.org/cgi/cvsweb.cgi/

ready for your perusal.

cheers
luigi

 TIA.
 
 Sincere regards,
 Pranav.J.Peshwe
 
 ---
 A picture is worth a thousand words.
 A formula is worth a thousand pictures.
 - Edsger W. Dijkstra
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Re: IO schedulers in FBSD...

2005-09-15 Thread Pranav Peshwe

- Original Message -
From: Luigi Rizzo [EMAIL PROTECTED]
To: Pranav Peshwe [EMAIL PROTECTED]
Cc: freebsd-hackers@freebsd.org
Sent: Thursday, September 15, 2005 6:31 PM
Subject: Re: IO schedulers in FBSD...


 On Thu, Sep 15, 2005 at 06:45:27PM +0530, Pranav Peshwe wrote:
  Hello,
  Which is the I/O scheduler used by FBSD 5.4 ?
  I googled in various ways but could not get an answer.

 it is called FCFSUSIIABPIWCTTOIS, which stands for
 First Come First Serve Unless Someone Is In A Better Position
 In Which Case The Temporal Order Is Subverted

 also known as the standard one-way elevator taught in all operating
 system courses.

  I do not have access to the source code.

 you do, it is at

 http://www.freebsd.org/cgi/cvsweb.cgi/

 ready for your perusal.

 cheers
 luigi


Thank you very much for the name and the source
link.Is there any documentation available on this
topic(fbsd io schedulers) ?
Where is the io scheduler located in the
src code tree ?
--
I found one more source for browsing the sources.
http://fxr.watson.org/
--

TIA.

Sincere regards,
Pranav

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When I die, I want to die like my friend's grandmother, who died peacefully
in her sleep. Not screaming like all the passengers in her car.

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Re: IO schedulers in FBSD...

2005-09-15 Thread Luigi Rizzo
On Thu, Sep 15, 2005 at 07:52:15PM +0530, Pranav Peshwe wrote:
...
 Thank you very much for the name and the source
 link.Is there any documentation available on this
 topic(fbsd io schedulers) ?
 Where is the io scheduler located in the
 src code tree ?

see http://wikitest.freebsd.org/moin.cgi/Hybrid there is more docs on this

cheers
luigi
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