From shahrukh at cs.virginia.edu  Mon Sep  4 22:01:29 2006
From: shahrukh at cs.virginia.edu (Shahrukh Tarapore)
Date: Mon, 04 Sep 2006 22:01:29 -0400
Subject: [Disksim-users] simple use of disk model
Message-ID: <44FCDA79.8060909@cs.virginia.edu>

I'm interested in pulling the disk model out of disksim, and I ran 
across the function disk_get_servtime() in disksim_diskctlr.c.  Will 
this function calculate the service time of the request without changing 
the state of the disk model, or is it like making a normal disksim 
request without going through the logical/physical organization of 
drivers, controllers, and buses?  Thanks.

--shahrukh


From bucy at gloop.org  Wed Sep  6 13:20:47 2006
From: bucy at gloop.org (John Bucy)
Date: Wed, 6 Sep 2006 10:20:47 -0700
Subject: [Disksim-users] simple use of disk model
In-Reply-To: <44FCDA79.8060909@cs.virginia.edu>
References: <44FCDA79.8060909@cs.virginia.edu>
Message-ID: <4fc1e0430609061020x19f12817qa41381fbdb369b5a@mail.gmail.com>

On 9/4/06, Shahrukh Tarapore <shahrukh at cs.virginia.edu> wrote:
> I'm interested in pulling the disk model out of disksim, and I ran
> across the function disk_get_servtime() in disksim_diskctlr.c.  Will
> this function calculate the service time of the request without changing
> the state of the disk model, or is it like making a normal disksim
> request without going through the logical/physical organization of
> drivers, controllers, and buses?  Thanks.

What do you mean by "pulling the disk model out"?  If you want the
whole controller/cache/scheduler, this is not really possible;  the
model is not anything like "closed form" and is defined in terms of
the whole state machine.   If you just want layout and mechanics, you
can get that from the diskmodel library.  You can always configure a
setup with a 0-time controller/bus/etc if you don't want those
effects.  What exactly are you trying to do?



john


From wm_freesky at 126.com  Fri Sep  8 03:08:07 2006
From: wm_freesky at 126.com (wang min)
Date: Fri, 8 Sep 2006 15:08:07 +0800
Subject: [Disksim-users] where can I get dixtrac?
Message-ID: <014f01c6d315$898449c0$6b280a0a@6ftss7fkyy7oyav>

hi,
   I need it too. now where can it be downloaded?

min

From wm_freesky at 126.com  Fri Sep  8 08:25:26 2006
From: wm_freesky at 126.com (wm_freesky)
Date: Fri, 8 Sep 2006 20:25:26 +0800 (CST)
Subject: [Disksim-users] where can I get DIXtrac?
Message-ID: <45016136.0000CD.03530@bj126app26.126.com>

hi,   
    Where can I get source code for dixtrac?
    If anybody have that please send me.
    waiting for reply.
    Thanks!

wang min
    
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From shahrukh at cs.virginia.edu  Sat Sep 16 21:34:59 2006
From: shahrukh at cs.virginia.edu (Shahrukh Rohinton Tarapore)
Date: Sat, 16 Sep 2006 21:34:59 -0400
Subject: [Disksim-users] time scale negative value
Message-ID: <450CA643.8090403@cs.virginia.edu>

Can anyone tell me what happens if I set the time scale parameter to a 
negative value?  I tried running a trace with disk requests spaced very 
closely together (with respect to time).  When I used positive  values 
for the time scale I would get errors that requests in the trace file 
were out of time order.  Only when I set the time scale parameter 
negative did disksim run through the entire trace without interruption. 

I want to be sure that using a negative value doesn't some how skew my 
results.  Thanks.

-- shahrukh


From zgy04 at 126.com  Sat Sep 16 22:20:44 2006
From: zgy04 at 126.com (Steve)
Date: Sun, 17 Sep 2006 10:20:44 +0800
Subject: [Disksim-users] time scale negative value
References: <450CA643.8090403@cs.virginia.edu>
Message-ID: <200609171020424045107@126.com>

Hello,Shahrukh,
    First,what I wonder is that even if the negative value makes disksim work well, does it make sense to you?
    Second, I advise you to make smooth the trace file (out of time order)by writing a toolkit. It is not hard.
    Third, I don't know the way you use disksim. Do you use disksim as a slave module or play the trace with disksim itself? If the latter, I have no idea. If the former, I have a thread that the syssim.c has a little bug with respect to calculatiing time.

    I hope it is useful to you.


All the best.

????????Steve
????????zgy04 at 126.com
????????2006-09-17


======= 2006-09-17 09:35:05 Shahrukh Rohinton Tarapore Written: =======

>Can anyone tell me what happens if I set the time scale parameter to a 
>negative value?  I tried running a trace with disk requests spaced very 
>closely together (with respect to time).  When I used positive  values 
>for the time scale I would get errors that requests in the trace file 
>were out of time order.  Only when I set the time scale parameter 
>negative did disksim run through the entire trace without interruption. 
>
>I want to be sure that using a negative value doesn't some how skew my 
>results.  Thanks.
>
>-- shahrukh
>_______________________________________________
>Disksim-users mailing list
>Disksim-users at ece.cmu.edu
>https://sos.ece.cmu.edu/mailman/listinfo/disksim-users
>

= = = = = = = = = = = = = = = = = = = =

??
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From yaborovsky at yahoo.com  Tue Sep 19 19:42:10 2006
From: yaborovsky at yahoo.com (micael yaborovsky)
Date: Tue, 19 Sep 2006 16:42:10 -0700 (PDT)
Subject: [Disksim-users] logical partitions 
Message-ID: <20060919234210.89700.qmail@web58507.mail.re3.yahoo.com>

Disksim users,
  I am new using disksim. 
Spouse I would like to simulate logical partitions in the disk,
And two proceses: one sends requests to the first partition, and the other to the second partition, how would I simulate this?
are logical partitions transparent to disksim?
  Good day,
Micael yaborobsky


 				
---------------------------------
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From kamashay at yahoo.com  Thu Sep 21 10:29:28 2006
From: kamashay at yahoo.com (shay raz)
Date: Thu, 21 Sep 2006 07:29:28 -0700 (PDT)
Subject: [Disksim-users] synthetic workload
Message-ID: <20060921142928.62975.qmail@web34002.mail.mud.yahoo.com>

Hello
  I would like to input syssim, the disksim interface, with synthetic workload.
  is it possible to extract the synthetic workload code from disksim source?
  what are the files involved, is it just disksim_synthio ?
  does anybody have program for generating synthetic workload?
  best,
  Shay Raz

 				
---------------------------------
Want to be your own boss? Learn how on  Yahoo! Small Business. 
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From shahrukh at cs.virginia.edu  Thu Sep 21 13:21:25 2006
From: shahrukh at cs.virginia.edu (Shahrukh Rohinton Tarapore)
Date: Thu, 21 Sep 2006 13:21:25 -0400
Subject: [Disksim-users] time scale negative value
In-Reply-To: <200609171020424045107@126.com>
References: <450CA643.8090403@cs.virginia.edu> <200609171020424045107@126.com>
Message-ID: <4512CA15.1090808@cs.virginia.edu>

Sorry for my late reply Steve, I've had a procmail bug which has been 
redirecting all my disksim mail to the wrong directory. To answer your 
questions:

I've tested disksim using a negative time scale value and it never seems 
to break. As far as it making sense... I don't think it does. My 
original problem was the traffic in my traces were time stamped so close 
together (on the order of 1000th of a millisecond) that disksim could 
not handle it. Making the time stamp negative has been the only way to 
get disksim to run to completion on these particular fine-grain traces.

I am using disksim in two ways: 1) as a slave to a system level 
simulator 2) as a validator to the storage simulation in 1. This problem 
I'm having only occur when validating via traces.

In the past week I've gone very in depth to manually calculate the 
request latencies disksim provides when the time stamp is negative. 
There seems to be no problem in running disksim this way, but I agree it 
doesn't make sense to do so. I'll just say it works and it is something 
to try if you ever have to run fine-grain time stamped traces in disksim.

-- shahrukh

Steve wrote:
> Hello,Shahrukh,
> First,what I wonder is that even if the negative value makes disksim 
> work well, does it make sense to you?
> Second, I advise you to make smooth the trace file (out of time 
> order)by writing a toolkit. It is not hard.
> Third, I don't know the way you use disksim. Do you use disksim as a 
> slave module or play the trace with disksim itself? If the latter, I 
> have no idea. If the former, I have a thread that the syssim.c has a 
> little bug with respect to calculatiing time.
> I hope it is useful to you.
> All the best.
> ????????Steve
> ????????zgy04 at 126.com
> ????????2006-09-17
> ======= 2006-09-17 09:35:05 Shahrukh Rohinton Tarapore Written: =======
> >Can anyone tell me what happens if I set the time scale parameter to a
> >negative value? I tried running a trace with disk requests spaced very
> >closely together (with respect to time). When I used positive values
> >for the time scale I would get errors that requests in the trace file
> >were out of time order. Only when I set the time scale parameter
> >negative did disksim run through the entire trace without interruption.
> >
> >I want to be sure that using a negative value doesn't some how skew my
> >results. Thanks.
> >
> >-- shahrukh
> >_______________________________________________
> >Disksim-users mailing list
> >Disksim-users at ece.cmu.edu
> >https://sos.ece.cmu.edu/mailman/listinfo/disksim-users
> >
> = = = = = = = = = = = = = = = = = = = =
> ??


From zgy04 at 126.com  Thu Sep 21 22:04:11 2006
From: zgy04 at 126.com (Steve)
Date: Fri, 22 Sep 2006 10:04:11 +0800
Subject: [Disksim-users] time scale negative value
References: <450CA643.8090403@cs.virginia.edu> <200609171020424045107@126.com>
	<4512CA15.1090808@cs.virginia.edu>
Message-ID: <200609221004097079403@126.com>

Hello,Shahrukh Rohinton Tarapore,
    I ran the disksim simulator under the trace whose time granularity is the same to yours,i.e. micro-second. It should be noted by you that the unit of the internal time in disksim is different from that of the sys time in the system level simulator. The unit in the latter is a second. So you can divide your timestamp by 10e6.
    I hope it will work.

All the best.

????????Steve
????????zgy04 at 126.com
????????2006-09-22


======= 2006-09-22 01:21:28 Shahrukh Rohinton Tarapore Written: =======

>Sorry for my late reply Steve, I've had a procmail bug which has been 
>redirecting all my disksim mail to the wrong directory. To answer your 
>questions:
>
>I've tested disksim using a negative time scale value and it never seems 
>to break. As far as it making sense... I don't think it does. My 
>original problem was the traffic in my traces were time stamped so close 
>together (on the order of 1000th of a millisecond) that disksim could 
>not handle it. Making the time stamp negative has been the only way to 
>get disksim to run to completion on these particular fine-grain traces.
>
>I am using disksim in two ways: 1) as a slave to a system level 
>simulator 2) as a validator to the storage simulation in 1. This problem 
>I'm having only occur when validating via traces.
>
>In the past week I've gone very in depth to manually calculate the 
>request latencies disksim provides when the time stamp is negative. 
>There seems to be no problem in running disksim this way, but I agree it 
>doesn't make sense to do so. I'll just say it works and it is something 
>to try if you ever have to run fine-grain time stamped traces in disksim.
>
>-- shahrukh
>
>Steve wrote:
> > Hello,Shahrukh,
> > First,what I wonder is that even if the negative value makes disksim 
> > work well, does it make sense to you?
> > Second, I advise you to make smooth the trace file (out of time 
> > order)by writing a toolkit. It is not hard.
> > Third, I don't know the way you use disksim. Do you use disksim as a 
> > slave module or play the trace with disksim itself? If the latter, I 
> > have no idea. If the former, I have a thread that the syssim.c has a 
> > little bug with respect to calculatiing time.
> > I hope it is useful to you.
> > All the best.
> > ????????Steve
> > ????????zgy04 at 126.com
> > ????????2006-09-17
> > ======= 2006-09-17 09:35:05 Shahrukh Rohinton Tarapore Written: =======
> >  >Can anyone tell me what happens if I set the time scale parameter to a
> >  >negative value? I tried running a trace with disk requests spaced very
> >  >closely together (with respect to time). When I used positive values
> >  >for the time scale I would get errors that requests in the trace file
> >  >were out of time order. Only when I set the time scale parameter
> >  >negative did disksim run through the entire trace without interruption.
> >  >
> >  >I want to be sure that using a negative value doesn't some how skew my
> >  >results. Thanks.
> >  >
> >  >-- shahrukh
> >  >_______________________________________________
> >  >Disksim-users mailing list
> >  >Disksim-users at ece.cmu.edu
> >  >https://sos.ece.cmu.edu/mailman/listinfo/disksim-users
> >  >
> > = = = = = = = = = = = = = = = = = = = =
> > ??
>_______________________________________________
>Disksim-users mailing list
>Disksim-users at ece.cmu.edu
>https://sos.ece.cmu.edu/mailman/listinfo/disksim-users
>

= = = = = = = = = = = = = = = = = = = =

??
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