Re: [PATCH] dynamic tick patch
From: Pavel Machek
Date: Wed Jan 19 2005 - 06:33:52 EST
Hi!
> As this patch is related to the VST/High-Res timers, there
> are probably various things that can be merged. I have not
> yet looked at what all could be merged.
>
> I'd appreciate some comments and testing!
Good news is that it does seem to reduce number of interrupts. Bad
news is that time now runs faster (like "sleep 10" finishes in ~5
seconds) and that I could not measure any difference in power
consumption.
Pavel
root@amd:~# date; cat /proc/interrupts ; sleep 10; date; cat
/proc/interrupts
Wed Jan 19 12:30:46 CET 2005
CPU0
0: 18136 IO-APIC-edge timer
1: 557 IO-APIC-edge i8042
10: 148 IO-APIC-level acpi
12: 69 IO-APIC-edge i8042
14: 1587 IO-APIC-edge ide0
15: 14 IO-APIC-edge ide1
17: 1 IO-APIC-level yenta
19: 2 IO-APIC-level ohci1394
21: 0 IO-APIC-level ehci_hcd, uhci_hcd, uhci_hcd, uhci_hcd
22: 0 IO-APIC-level VIA8233
23: 0 IO-APIC-level eth0
NMI: 0
LOC: 20924
ERR: 0
MIS: 0
Wed Jan 19 12:30:56 CET 2005
CPU0
0: 18253 IO-APIC-edge timer
1: 558 IO-APIC-edge i8042
10: 148 IO-APIC-level acpi
12: 69 IO-APIC-edge i8042
14: 1587 IO-APIC-edge ide0
15: 14 IO-APIC-edge ide1
17: 1 IO-APIC-level yenta
19: 2 IO-APIC-level ohci1394
21: 0 IO-APIC-level ehci_hcd, uhci_hcd, uhci_hcd, uhci_hcd
22: 0 IO-APIC-level VIA8233
23: 0 IO-APIC-level eth0
NMI: 0
LOC: 21062
ERR: 0
MIS: 0
root@amd:~#
(But it really took somewhere around 5 seconds).
Pavel
--
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