Linus' current tree seems to trigger this in perf_event_open on startup: if (value[ptr]!='0') fprintf(stderr,"Expected 0x\n"); ptr++; if (value[ptr]!='x') fprintf(stderr,"Expected 0x\n"); ptr++; I think it's from this.. /sys/bus/event_source/devices/cpu/events/mem-loads event=0xcd,umask=0x1,ldlat=3 Looks like that field isn't always hex. Dave -- To unsubscribe from this list: send the line "unsubscribe trinity" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html