On 15.02.2011, at 15:21, Dushyant Bansal wrote:
Hrm. This means that your kernel headers in /usr/include/linux are too old. Can
you try and find out which kernel version they are from please
Yes, kernel headers version is 2.6.32. For the time being, I copied some of the
header files from kvm/arch/powerpc/include/asm/ to kernel headers and qemu
build was successful.
Thanks a lot.
Awesome! I'm eager to hear how well it works for you :)
I collected some performance stats using kvm_stat. To get more information
about exit counts of individual instructions, I configured CFLAGS_emulate.o
with DDEBUG flag.
Now, I can see output of "pr_debug("Emulating opcode %d / %d\n", get_op(inst),
get_xop(inst));" instruction in kernel logs.
I have two queries:
1. The count of "Emulating opcode...." statement in /var/log/kern.log (3
million) is coming out to be much less than emulated_inst_exits (22 million) using
kvm_stat.
The kernel log ring buffer is probably faster filled than read :).
2. How to configure makefiles to get output of printk statements inside
kvm/arch/powerpc/kvm/trace.h
Better don't make them printks - just use the tracing framework. I'd write up a
small howto here myself, but I'm pretty much on the jump to my plane for
vacation. Avi, could you please guide him a bit on how to get data out of
tracepoints?