Always nice to see performance measurement and analysis! Lets skip the debugfs file -- it is only read once, and so you might as well use dmesg. [00000.0000] ACPI: acpi_bus_scan took 45.082 usec if (usec > 100 usec) printk(...) else be quiet ---------- please show the next edition output as a result of a grep on dmesg thanks, -Len -- To unsubscribe from this list: send the line "unsubscribe linux-acpi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html