Vivek,
Lightweight profiling is a proposal that will be implemented in future
hardware. Current silicon support IBS only. IBS is documented in the
BIOS and Kernel Developers Guide (Section 2.17, Performance Monitoring)
as well as in the Software Optimization Guide (Appendix G, Guide to
IBS). Both these documents are available online:
http://developer.amd.com/documentation/guides/Pages/default.aspx
If you have specific IBS-related questions that are not addressed in the
BKDG & SWOG, send them my way. Regarding the best perfmon2/libpfm
versions for IBS, I am not the right person to ask. Robert / Stephane?
Anoop
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of Vivek
Thakkar
Sent: Sunday, May 04, 2008 8:35 PM
To: [email protected]
Subject: [perfmon2] AMD Barcelona IBS
Hi,
I need to program IBS in Barcelona processors. The event I am looking
for is L2 load cache miss and I need the data addresses for such loads.
Can someone point me to some relevant documentation ?
I have a link regarding LWP profiling support of AMD but I guess it is
not yet out. Here is the link :
http://developer.amd.com/assets/HardwareExtensionsforLightweightProfilin
gPublic20070720.pdf
Is it significantly different from the current IBS support ?
Also, I have 2.6.23 kernel patched with perfmon. Which libpfm should I
use ? libpfm-3.3 has a sample example for IBS but I am not sure if this
is the best library with the kernel that i have. Please guide.
Sincerely,
Vivek Thakkar
Graduate Student and Research Assistant
CSC Department, NC State University
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