Re: [PATCH] dynamic tick patch

[Tony Lindgren <tony@xxxxxxxxxxx>]

* Pavel Machek <pavel@xxxxxxx> [050119 15:58]:
> Hi!
> 
> > > > Thanks for trying it out. I have quite accurate time here on my
> > > > systems, and sleep works as it should. I wonder what's happening on
> > > > your system? If you have a chance, could you please post the results
> > > > from following simple tests?
> > > 
> > > On patched 2.6.11-rc1:
> > > 
> > > [Heh, clock is two times too fast, perhaps that makes ntpdate fail? -- yes.
> > > 
> > > root@amd:~# dmesg | grep -i time; for i in 1 2 3 4 5; do ntpdate -b tak.cesnet.cz && sleep 10; done ; date && sleep 10 && date; while [ 1 ]; do date; done | uniq
> > > PCI: Setting latency timer of device 0000:00:11.5 to 64
> > > dyn-tick: Enabling dynamic tick timer
> > > dyn-tick: Timer using dynamic tick
> > 
> > Thanks. Looks like you're running on PIT only, I guess my patch
> > currently breaks PIT (and possibly HPET) No dmesg message for "
> > "Using XXX for high-res timesource".
> 
> This machine definitely has TSC... What do I have to do in .config to
> make it do something interesting? My .config is:

I suspect it's the HPET_TIMER, see below. CONFIG_X86_PM_TIMER is
optional, otherwise TSC is used.

Tony

--- config.orig	2005-01-19 16:05:16.000000000 -0800
+++ config	2005-01-19 16:06:07.000000000 -0800
@@ -103,7 +103,7 @@
 CONFIG_X86_GOOD_APIC=y
 CONFIG_X86_INTEL_USERCOPY=y
 CONFIG_X86_USE_PPRO_CHECKSUM=y
-CONFIG_HPET_TIMER=y
+# CONFIG_HPET_TIMER is not set
 CONFIG_NO_IDLE_HZ=y
 # CONFIG_SMP is not set
 CONFIG_PREEMPT=y
@@ -169,7 +169,7 @@
 CONFIG_ACPI_POWER=y
 CONFIG_ACPI_PCI=y
 CONFIG_ACPI_SYSTEM=y
-# CONFIG_X86_PM_TIMER is not set
+CONFIG_X86_PM_TIMER=y
 # CONFIG_ACPI_CONTAINER is not set
 
 #