I want to use xenoprof to profile the overhead of the hypervisor.
I patched the oprofile-0.9.5 using the patch from xenoprof.sourceforge.net
Debian GNU/Linux 5.0 (lenny)
Xen-4.0.1 + 220.127.116.11 (linux-2.6-pvops.git) Dom0
My platform is Intel(R) Core(TM) i7 CPU 960 @ 3.20GHz
My problems are:
In Dom0, after initialization (opcontrol --init), W
hen I start daemon this in Dom0, I got the following error messages :
opcontrol --start-daemon --event=CPU_CLK_UNHALTED:1000000 --xen=/boot/xen-syms-4.0.1
Error: counter 0 not available nmi_watchdog using this resource ? Try: [Comments: there is not /dev/oprofile/0 in /dev/oprofile]
echo 0 > /proc/sys/kernel/nmi_watchdog [Comments: I do it using this instructions, but it does not work; and I find that the /proc/sys/kernel/nmi_whatchdog is 0 already]
My questions are:
1. Couldn't xenoprof works in Xen 4.0.1 ?
2. Why these error message were output If xenoprof works in Xen 4.0.1 ?