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3 Replies Last post: Apr 27, 2009 6:31 AM by fixitchris

Memory accesses of OS processes posted: Apr 20, 2009 5:45 PM

moussaba

7 posts since
Apr 20, 2009

Good Day,

I would like to gather statistics on memory accesses for processes under a vm, things like number of memory read, writes, time of occurence for specific processes in a VM. Does vprobe have events and mechanisms allowing me to gather this information? I am interested on gathering this data for both linux and windows.

Thank you.

Tags: vmware, linux, windows, memory

Re: Memory accesses of OS processes

1. Apr 25, 2009 12:46 AM

in response to: moussaba

fixitchris

549 posts since
Dec 8, 2006

Yes, did you watch the video? http://www.vmwarevideos.com/vmware-videoes-workstation-vprobes-record-replay-and-debugging

Re: Memory accesses of OS processes

2. Apr 26, 2009 8:51 PM

in response to: fixitchris

moussaba

7 posts since
Apr 20, 2009

I did watch the video, but the metrics I am interested in are apparently not directly supported by vprobe. Memory reads or writes are supported for specific addresses. In other words, you can use GUEST_READ or GUEST_WRITE:address to trigger an event. I am interested in watching a range of addresses where any reads or writes are recorded would trigger an event. A VMware engineer has already replied saying this is not supported. I am trying to find ways around this limitation as the maximum number probes per VM is currently 32.

Re: Memory accesses of OS processes

3. Apr 27, 2009 6:31 AM

in response to: moussaba

fixitchris

549 posts since
Dec 8, 2006

I see what you are looking for... When I was first introduced to Vprobes, I was also under the impression that I could somehow use vprobes as a 'passive debugger'. This would have been awesome. Plus, the 32probe limit is another issue.

Have you verified that wildcards are not supported in linear addresses?

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