Dear Robert, I am sorry for delay. By enabling ACPI on my PC I get acpi_pm I am also getting : root@rd cycletest]# ./cyclictest -t 1 -p80 -n -i 10000 -l 10000 -q T: 0 ( 2709) P:80 I:10000 C: 10000 Min: 8 Act: 16 Avg: 16 Max: 44 [root@rd cycletest]# ./cyclictest -t 1 -p80 -i 10000 -l 10000 -q T: 0 ( 2723) P:80 I:10000 C: 10000 Min: 21 Act: 30 Avg: 29 Max: 139 [root@rd cycletest]# These numbers are quite impressive as compared to old numbers. Thanks for your help. I am quite strange why I start getting RT performance with ACPI. why I need ACPI on my PC, I dont even use ACPI on my Laptop. But I am not able to see performance difference in my GNOME Environment. It is still very very slow, how can I boost X-Windows by -rt patch. Thank you, Jaswinder Singh. On 10/2/07, Robert Schwebel <r.schwebel@xxxxxxxxxxxxxx> wrote: > On Mon, Oct 01, 2007 at 09:00:42AM +0530, Jaswinder Singh wrote: > > /sys/devices/system/clocksource/clocksource0/available_clocksource : > > tsc pit jiffies > > Can you try to enable ACPI on the box and check if you get an acpi_pm? > > Robert > -- > Pengutronix - Linux Solutions for Science and Industry > Entwicklungszentrum Nord http://www.pengutronix.de > - To unsubscribe from this list: send the line "unsubscribe linux-rt-users" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html