From KVM

Tracing is done by means of kernel tracepoints, the ftrace infrastructure, and trace-cmd.

Installing trace-cmd

  1. Install the udis86 and udis86-devel packages
  2. download trace-cmd:
 $ git clone git:// trace-cmd
 $ cd trace-cmd
  1. build and install:
 $ make && sudo make install


 # trace-cmd record -b 20000 -e kvm

(trace-cmd will wait)

run your workload, then stop trace-cmd with ctrl-C. trace-cmd will write a trace.dat file.

Analyzing the trace

 trace-cmd report

will format and display the contents of the trace.