[Disksim-users] Disksim doesn't work for some synthetic IO settings (open system)

[askool]

Solved the first problem. It is due to the parameter loader. 

[ exponential, 0.0, 50  ] is explained as [ exponential, 0.0, 0  ].

It should be [ exponential, 0.0, 50.0 ]

 

From: disksim-users-bounces at ece.cmu.edu
[mailto:disksim-users-bounces at ece.cmu.edu] On Behalf Of askool
Sent: Wednesday, 9 October, 2013 4:58 PM
To: disksim-users at ece.cmu.edu
Subject: [Disksim-users] Disksim doesn't work for some synthetic IO settings
(open system)

 

Hi all,

 

I found several abnormal situations that the disksim doesn't work for open
subsystem model.

 

1)      The simtime is stuck at time 0.

 

--------------------please replace the synthio of "atlas_III.parv" as
follows-------------

disksim_synthio Synthio {

   Number of I/O requests to generate =  100,

   Maximum time of trace generated  =  1000.0,

   System call/return with each request =  0,

   Think time from call to request =  0.0,

   Think time from request to return =  0.0,

Generators = [

disksim_synthgen { # generator 0 

   Storage capacity per device  =  17770250,

   devices = [ disk0 ], 

   Blocking factor =  8,

   Probability of sequential access =  0,

   Probability of local access =  0,

   Probability of read access =  0.4,

   Probability of time-critical request =  0.0,

   Probability of time-limited request =  0.0,

   Time-limited think times  = [ normal, 30.0, 100.0  ],

   General inter-arrival times  = [ exponential, 0.0, 50  ],

   Sequential inter-arrival times  = [ exponential, 0.0, 50.0  ],

   Local inter-arrival times  = [ exponential, 0.0, 50.0  ],

   Local distances  = [ normal, 0.0, 40000.0  ],

   Sizes  = [ exponential, 0.0, 8.0  ]

} # end of generator 0 

] # end of generator list 

} # end of synthetic workload spec

-------------------------------------

 

2)      Unexpected request location

--------------------please replace the synthio of "hp_c3323a.parv" as
follows------------

disksim_synthio Synthio {

   Number of I/O requests to generate =  100,

   Maximum time of trace generated  =  1000.0,

   System call/return with each request =  0,

   Think time from call to request =  0.0,

   Think time from request to return =  0.0,

Generators = [

disksim_synthgen { # generator 0 

   Storage capacity per device  =  4155272,

   devices = [ disk0 ], 

   Blocking factor =  8,

   Probability of sequential access =  0.0,

   Probability of local access =  0.0,

   Probability of read access =  0.66,

   Probability of time-critical request =  0.0,

   Probability of time-limited request =  0.0,

   Time-limited think times  = [ normal, 30.0, 100.0  ],

   General inter-arrival times  = [ exponential, 0.0, 50.0  ],

   Sequential inter-arrival times  = [ normal, 0.0, 0.0  ],

   Local inter-arrival times  = [ exponential, 0.0, 0.0  ],

   Local distances  = [ normal, 0.0, 40000.0  ],

   Sizes  = [ exponential, 0.0, 8.0  ]

} # end of generator 0 

] # end of generator list 

} # end of synthetic workload spec

 

Thanks!

 

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