• Eiichi Tsukata's avatar
    trace: Add ftrace tracing backend · 781e9545
    Eiichi Tsukata authored
    This patch adds a ftrace tracing backend which sends trace event to
    ftrace marker file. You can effectively compare qemu trace data and
    kernel(especially, kvm.ko when using KVM) trace data.
    The ftrace backend is restricted to Linux only.
    To try out the ftrace backend:
     $ ./configure --trace-backend=ftrace
     $ make
    if you use KVM, enable kvm events in ftrace:
     # sudo echo 1 > /sys/kernel/debug/tracing/events/kvm/enable
    After running qemu by root user, you can get the trace:
     # cat /sys/kernel/debug/tracing/trace
    Signed-off-by: default avatarEiichi Tsukata <eiichi.tsukata.xh@hitachi.com>
    Signed-off-by: default avatarStefan Hajnoczi <stefanha@redhat.com>
Makefile.objs 3 KB