[Xen-devel] [PATCH] add oprofile Kconfig

[Andrew Theurer <habanero@xxxxxxxxxx>]

This is a trivial patch to add kernel config support for oprofile.  I 
have been using oprofile for the last few days (timer int based) and it 
seems to work "OK".  IMO, oprofile could stand a lot of virtualization 
awareness, and I would like to discuss what everyone would like to see.
I would like oprofile to have the ability to profile the entire system, 
including xen and all running domains.  I would think running oprofile 
daemon in dom0 would be adequate, as long as we could (a) modify 
oprofile driver to tell xen what kind of events we need (b) have xen 
forward data for those events to dom0 (c) add info in that data that 
tells oprofile what domain or if xen was running (d) modify oprofile 
reporters to be aware of the new data and have reference to bins in 
other running domains.
I suppose oprofile could still be run in a domU, but probably just timer 
int based profiling.  If one would want to use perf counters in just the 
context of a single domU, I guess we would have to save/restore that 
data on the cpus as we switch from/to that domU?
-Andrew Theurer

diff -Naurp xen-unstable-orig/linux-2.6.10-xen-sparse/arch/xen/Kconfig.drivers 
xen-unstable/linux-2.6.10-xen-sparse/arch/xen/Kconfig.drivers
--- xen-unstable-orig/linux-2.6.10-xen-sparse/arch/xen/Kconfig.drivers  
2005-02-24 22:12:10.000000000 -0600
+++ xen-unstable/linux-2.6.10-xen-sparse/arch/xen/Kconfig.drivers       
2005-02-25 14:55:49.410321096 -0600
@@ -52,4 +52,6 @@ config UNIX98_PTYS
        default y
 endif
 
+source "arch/i386/oprofile/Kconfig"
+
 endmenu