RE: [Xen-devel] RE: [PATCH] Xenoprof passive domain support fixes

["Santos, Jose Renato G" <joserenato.santos@xxxxxx>]

Rosimildo,

You are correct. This explains the problem that Ray is seeing.
We need to fix the kernel code to use the right address range from the
image file specified with --passive-images option. And in case the image
file is not specified we need to rely on the CPU mode (user/kernel/xen)
to assign the sample to the right bin. 
I will proabbly not have time to work on this before the Ottawa Linux
Simposium next week which I will be attending. 
If nobody provides a fix until them I will work something out when I
come back.
Xiaowei, any change you could provide a fix for this?

Thanks

Renato

PS- Brasileiro, sim. Bom encontrar outro brasileiro por aqui ...

>> -----Original Message-----
>> From: DaSilva, Rosilmildo [mailto:rosilmildo.dasilva@xxxxxxx] 
>> Sent: Friday, July 14, 2006 7:37 AM
>> To: Ray Bryant; xen-devel@xxxxxxxxxxxxxxxxxxx
>> Cc: Santos, Jose Renato G; Yang, Xiaowei
>> Subject: RE: [Xen-devel] RE: [PATCH] Xenoprof passive domain 
>> support fixes
>> 
>> Ray,
>> A 64bit guest would never have any entry on pvmlinux?, since 
>> the code on opd_kernel.c, line 112 ( of oprofile ), 
>> hardcodes the addresses in the range of 0xC0100000 - 
>> 0xC060000. The 64bits guest has a complete different range.
>> 
>> Renato, seu nome parece um nome Brasileiro.
>> Rosimildo. 
>> 
>> -----Original Message-----
>> From: Ray Bryant [mailto:raybry@xxxxxxxxxxxxxxxxx]
>> Sent: Friday, July 14, 2006 9:01 AM
>> To: xen-devel@xxxxxxxxxxxxxxxxxxx
>> Cc: Santos, Jose Renato G; Yang, Xiaowei; DaSilva, Rosilmildo
>> Subject: Re: [Xen-devel] RE: [PATCH] Xenoprof passive domain 
>> support fixes
>> 
>> Renato,
>> 
>> BTW, the HVM guest I am running (and hence the passive 
>> image) is a 64-bit 
>> guest.   We've run experiments with 32 bit guests and we do 
>> get pvmlinux
>> 
>> samples.    There may be other differences between these experiments,
>> but 
>> this is the only one we've been able to identify thus far.   
>> 
>> So perhaps there is something broken about kernel samples in 
>> a passive domain and 64 bit?
>> 
>> --
>> Ray Bryant
>> AMD Performance Labs                   Austin, Tx
>> 512-602-0038 (o)                 512-507-7807 (c)
>> 
>> 
>> 

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