Print the generic metric header even when the expression evaluation
failed. Otherwise an expression that fails on the first collections due
to division by zero may suddenly reappear later without an header.
Signed-off-by: NAndi Kleen <ak@linux.intel.com>
Acked-by: NJiri Olsa <jolsa@kernel.org>
Link: http://lkml.kernel.org/r/20170831194036.30146-5-andi@firstfloor.orgSigned-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>