On Mon, Feb 13, 2012 at 3:12 PM, Andreas Färber <afaer...@suse.de> wrote: > Hi, > > Am 12.02.2012 05:32, schrieb Wei Yang: >> I enable the trace function with --enable-trace-backend=simple and I >> create the event file like this >> g_realloc >> g_malloc >> >> Then I start the qemu with following command. >> ./i386-softmmu/qemu-system-i386 -enable-kvm -drive >> file=../../kvm/ubuntu.img -boot dc -m 512 -usb >> -monitor stdio -trace events=qemu_trace_events,file=qemu_trace.log >> >> After some run time, I run the script like: >> ./scripts/simpletrace.py qemu_trace_events_parse qemu_trace.log >> >> The qemu_trace_events_parse is : >> g_realloc(addr) >> g_malloc(addr) >> >> The output looks like: >> g_malloc 1.831 addr=0xb945d1f0 >> g_malloc 2.498 addr=0xb945d1f0 >> g_realloc 4.715 addr=0x10 >> g_realloc 1.520 addr=0xc >> g_realloc 1.505 addr=0xc >> >> The steps I used is correct? > > Not quite. IIRC you need to pass in path/to/qemu/trace-events with the > full list of events you were using at the time of tracing (trace file > uses index of event). That file also contains a format string from which > you can infer what the arguments mean.
Right: $ scripts/simpletrace.py trace-events trace-12345