Hi Paul, The error occurs when after simulation mode is started, it seems that the Assertion `ctx.page_fault_addr != 0' failure occur very soon after the simulation starts. The output shows that
Completed 0 cycles, 0 commits: 0 Hz, 0 insns/sec But for the Assertion `physreg->data' failure, there are some instructions are committed: Completed 351000 cycles, 225581 commits: 420941 Hz, 266862 insns/sec I will try snapshot parameter when run simulations. By the way, apparently the rootsize=60GB is too large for ubuntu-vm-builder, it always produce an image with 5GB space. I now changed it to 20GB. The produced image is in correct size now. I will do further test to see if this can change the situation. Thanks On Tue, Apr 16, 2013 at 11:27 AM, Paul Rosenfeld <[email protected]>wrote: > Sorry, forgot to reply all. > > Does the error happen on the very first time you try to run a disk image > or is it intermittent? > > I'd recommend you add the -snapshot option when you are planning on > running simulation. This will throw away any changes to the disk that > happen during your session when the simulation ends and hopefully make the > corruption go away. > > > On Tue, Apr 16, 2013 at 11:24 AM, Xin Xu <[email protected]> wrote: > >> Hi Paul, >> >> Thanks for your reply. Here is the command, >> >> qemu/qemu-system-x86_64 -m 4096 -hda tmpDSQFvf.qcow2 -net >> nic,model=ne2k_pci -net user >> >> >> >> >> On Tue, Apr 16, 2013 at 11:21 AM, Paul Rosenfeld <[email protected]>wrote: >> >>> What is the command are you using to start marss (specifically, are you >>> using the -snapshot option)? >>> >>> >>> On Mon, Apr 15, 2013 at 2:58 PM, Xin Xu <[email protected]> wrote: >>> >>>> Hi, >>>> >>>> I am trying to set up a customized image with xen hypervisor using the >>>> ubuntu-vm-builder tool. I follow the instructions in this page >>>> http://marss86.org/~marss86/index.php/Custom_Disk_Images >>>> and create a precise 12.04 ubuntu image with default disk size 4GB. >>>> This image can be correctly loaded and executed within the marssx86 in >>>> emulation mode. However, once I start the simulation mode using these >>>> commands >>>> >>>> simconfig -machine xeon_single_core >>>> simconfig -run -stopinsns 10m -stats output.log >>>> >>>> after certain numbers of instructions, the simulation breaks with >>>> assertion failures. I observed two types of assertions: >>>> >>>> Assertion `ctx.page_fault_addr != 0' failed >>>> Assertion `physreg->data' failed >>>> >>>> >>>> I searched in the mailing list, it seems that the problem is caused by >>>> the corrupted images. I create several images with 12.04 and 11.10. They >>>> all have the same problem. I am not sure where is the problem. >>>> >>>> One thing I would like to mention is even if I specify the rootsize in >>>> the config file of ubuntu-vm-builder to other sizes such as 60gb/40gb, but >>>> the created image is always 4gb. I am not sure if this is related or not. >>>> >>>> I also tried the raw format image that created by virtualbox, the >>>> problem is same. The emulation part is OK even if an application is running >>>> in domu, but the simulation always breaks. >>>> >>>> Any suggestions would be appreciated. Thanks >>>> >>>> _______________________________________________ >>>> http://www.marss86.org >>>> Marss86-Devel mailing list >>>> [email protected] >>>> https://www.cs.binghamton.edu/mailman/listinfo/marss86-devel >>>> >>>> >>> >> >
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