Re: [Qemu-devel] Memory Tracking API

2012-05-20 Thread Jaspal 

On 05/18/2012 12:17 AM, Richard W.M. Jones wrote:

On Thu, May 17, 2012 at 11:36:24PM +0530, Jaspal wrote:

Hi ,

Is it possible to keep a count of reads / writes taking place in a
vm using qemu ( using kvm as hypervisor ) ? Is there a api ( or any
patch ) for it ?

Memory reads and writes is surely going to generate a huge
amount of output!

There are various DEBUG_* symbols at the top of exec.c and ioport.c.
I've only used a few of these:

   DEBUG_UNASSIGNED - prints a message when an unmapped page is
   referenced (TCG only, presumably?)

   DEBUG_IOPORT - prints a message when any I/O port is referenced

   DEBUG_UNUSED_IOPORT - prints a message when a non-emulated I/O port
   is referenced

There are several more if you look at the code.

Rich.



When are these functions called : kvm_read_guest_page , 
kvm_read_guest_atomic , kvm_write_guest_page present in kvm_main.c  ? 
When qemu wants to read/write to a page ? If qemu has to read/write on 
the vm's memory ( RAM ) , does the process always involve kvm ?


Thanks ,
Jaspal

[Qemu-devel] Memory Tracking API

2012-05-17 Thread Jaspal 

Hi ,

Is it possible to keep a count of reads / writes taking place in a vm 
using qemu ( using kvm as hypervisor ) ? Is there a api ( or any patch ) 
for it ?


Thanks ,
Jaspal

Re: [Qemu-devel] QEMU for begineers

2012-03-10 Thread Jaspal Dhillon 
Hi Avinash ,

These links contain enough information for you to get started :

http://wiki.qemu.org/Manual
https://help.ubuntu.com/community/Installation/QemuEmulator


--Jaspal


On Sat, Mar 10, 2012 at 1:24 PM, Avinash Jain  wrote:

> Hello, myself Avinash Jain. I want to contribute to QEMU but i don't know
> anything about it, I am new to this. Can any buddy please provide me an
> initial step. I work on Ubuntu 10.10. Please provide me some demo tutorial
> to start with Qemu on ubutnu.
>
> --
> thanx & regards,
> avinash
> (+91) 9502681447
>
>