Re: [gem5-users] Is it possible to write the output file of an application into linux.img when full system gem5 runs the application.

[GE ZHIGUO]

It works now. The problem seems due to application execution problem.

Thanks!

Zhiguo

From: GE ZHIGUO
Sent: Tuesday, July 17, 2012 1:07 PM
To: gem5 users mailing list
Subject: RE: [gem5-users] Is it possible to write the output file of an 
application into linux.img when full system gem5 runs the application.

Hi, Tony

      I followed the instructions in the webpage that you provided.
Now, I can see the output file  from the directory. However, when I tried to 
read the file
(such as ls output_file),  error was encountered:  input/output error.

Steps done:


1.      Modify fsconfig.py
#class CowIdeDisk(IdeDisk):
#    image = CowDiskImage(child=RawDiskImage(read_only=False),
#                         read_only=False)
#
#    def childImage(self, ci):
#        self.image.child.image_file = ci

class RawIdeDisk(IdeDisk):
      image = RawDiskImage(read_only=False)

      def childImage(self, ci):
           self.image.image_file = ci

Since I'm using Linux Alpha System, on the def makeLinuxAlphaSystem(mem_mode, 
mdesc = None):

I changed the following codes

   #self.disk0 = CowIdeDisk(driveID='master')
    #self.disk2 = CowIdeDisk(driveID='master')
    self.disk0 = RawIdeDisk(driveID='master')
    self.disk2 = RawIdeDisk(driveID='master')

2. compile and install busybox, and execute busybox sync

Thanks!

Zhiguo



From: gem5-users-boun...@gem5.org [mailto:gem5-users-boun...@gem5.org] On 
Behalf Of Anthony Gutierrez
Sent: Monday, July 16, 2012 11:20 AM
To: gem5 users mailing list
Subject: Re: [gem5-users] Is it possible to write the output file of an 
application into linux.img when full system gem5 runs the application.

Are you asking if it is possible to make changes to the file-system on the disk 
image permanent? Yes, it is possible. You need to remove the copy-on-write 
layer. I did this when developing the BBench-ICS disk image. Check out this 
link:

http://gem5.org/Bbench-gem5#Tips_for_Making_Your_Disk_Image_gem5_Friendly

-Tony
On Sun, Jul 15, 2012 at 11:15 PM, GE ZHIGUO 
<ge.zhi...@huawei.com<mailto:ge.zhi...@huawei.com>> wrote:
It seems that the output file in full system GEM5 is a ram file which will not 
be written to linux.img.
Due to this, I cannot get the file after I exit gem5 simulation environment.

Thanks!

Zhiguo

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