# print perf headers

def print_feat(feat):
    print "# Measured on %s (%s)" % (
            feat.hostname.hostname,
            feat.osrelease.osrelease)
    print "# %s, %s" % (
            feat.cpudesc.cpudesc,
            feat.cpuid.cpuid)
    print "# %s" % (" ".join(map(lambda x: x.cmdline, feat.cmdline.cmdline)))