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...tps32 is often that value. Does anyone know why this happens? I''ve resolved it temporarily by checking for tps32 == 1000000000 and changing the value slightly (101000010d works fine on my test machine), but I''m not sure if that''s the approved approach for Xen. -Mark Langsdorf Operating System Research Center AMD _______________________________________________ Xen-devel mailing list Xen-devel@lists.xensource.com http://lists.xensource.com/xen-devel

Modify the cpufreq ondemand governor so that it can get idle and total ticks from the Xen hypervisor. Linux and Xen have different ideas of what an idle tick is, so the Xen values for both have to be returned in the same platform hypercall. Signed-off-by: Mark Langsdorf <mark.langsdorf@amd.com> diff -r b4278beaf354 xen/arch/x86/platform_hypercall.c --- a/xen/arch/x86/platform_hypercall.c Wed Oct 17 13:12:03 2007 +0100 +++ b/xen/arch/x86/platform_hypercall.c Thu Oct 18 16:07:53 2007 -0500 @@ -295,14 +295,17 @@ ret_t do_platform_op(XEN_GUEST_HANDLE(xe {...

These are the diffs against the pristine versions of arch/x86_64/kernel/[aperture.c,pci-gart.c] to better show the changes necessary to adapt those files to Xen. They were included with the patch and should not be applied again. -Mark Langsdorf AMD, Inc. --- pristine-linux-2.6.12/arch/x86_64/kernel/aperture.c 2005-06-17 12:48:29.000000000 -0700 +++ linux-2.6-xen-sparse/arch/xen/x86_64/kernel/aperture.c 2006-01-12 10:53:17.000000000 -0800 @@ -83,7 +83,7 @@ printk("Aperture from %s beyond 4GB. Ignoring.\n",name); return 0;...

...e is not implemented in waldi 3.1-2 kernel, but only in 3.3-1. I''ll check it out tonight, as booting a new kernel per remote is a bit too dangerous. This would be exactly what I need. BR, Carsten. Von: Niraj Tolia Gesendet: Mit, 7.1.2009 22:53 An: Carsten Schiers Cc: jbeulich ; mark.langsdorf ; xen-devel Betreff: Re: RE: [Xen-devel] AMD P-States not recognized for Xen 3.3 and 3.4 On Wed, Jan 7, 2009 at 1:02 PM, Carsten Schiers wrote: So having read that, I have to summarize that working with the Xen 3.2.1 / 2.6.18-xen-3.1-2 kernel / cpufreq=dom0-kernel team seems to be the best...

...mand governor so that it can get idle and total ticks from the Xen hypervisor. Linux and Xen have different ideas of what an idle tick is, so the Xen values for both have to be returned in the same platform hypercall. Otherwise, use basically the same scheme as native Linux. Signed-off-by: Mark Langsdorf <mark.langsdorf@amd.com> iff -r 9bf1ddd0f6bf drivers/cpufreq/cpufreq_ondemand.c --- a/drivers/cpufreq/cpufreq_ondemand.c Wed Oct 17 09:24:03 2007 +0100 +++ b/drivers/cpufreq/cpufreq_ondemand.c Thu Oct 18 16:08:36 2007 -0500 @@ -221,18 +222,14 @@ static struct attribute_group dbs_attr_g };...

Testing by Red Hat show that changeset:0034d9389130 causes regressions on Intel machines that don''t use APIC ID lifting but that do have a strange ACPI to APIC numbering. Modify the patch so that it only applies to AMD machines. -Mark Langsdorf Operating System Research Center AMD Signed-off-by: Mark Langsdorf <mark.langsdorf@amd.com> diff -r 49ffe9ef67d4 drivers/xen/core/smpboot.c --- a/drivers/xen/core/smpboot.c Fri Feb 29 10:29:13 2008 +0000 +++ b/drivers/xen/core/smpboot.c Fri Feb 29 12:54:47 2008 -0600 @@ -276,7 +276,8 @@ voi...

Hello ! Does anybody know how to build and use cpufreq support that should be in 3.2 since -unstable time ? Bye -- __________________________________________________ Ralf Schenk fon (02 41) 9 91 21-0 fax (02 41) 9 91 21-59 rs@databay.de Databay AG Hüttenstraße 7 D-52068 Aachen www.databay.de Vorstand: Jens Conze, Ralf Schenk, Aresch Yavari Aufsichtsratvorsitzender: Ansgar Vögeli

...e platform timers. Did this issue ever get resolved? Is there a better solution that using pit as a clocksource? I''d really prefer to not disable C-states, as the hardware I''m using gets significant performance and performance/watt benefits from being able to enter C2. --Mark Langsdorf Operating System Research Center AMD _______________________________________________ Xen-devel mailing list Xen-devel@lists.xensource.com http://lists.xensource.com/xen-devel

Hi, I recently subscribed to xen-users asking about a powernow-k8 problem, but in the meantime I am not sure if the users-list was the right place for it. So I decided to repeat my question here ;-) My current config is attached. --- snip --- Hi, I recently installed Xen on my AMD64 for my first time and so far, everything seems to work pretty fine. :-) I tried to enable cpu frequency

Modify the cpufreq ondemand governor so that it can get idle and total nsecs from the Xen hypervisor.  Xen uses nsecs to measure idle time, while Linux uses ticks. Other than accounting for that difference, use the same algorithm to calculate idle time as Linux does. Signed-off-by: Mark Langsdorf <mark.langsdorf@amd.com> diff -r 26962454b508 drivers/cpufreq/cpufreq_ondemand.c --- a/drivers/cpufreq/cpufreq_ondemand.c Wed Oct 24 17:17:09 2007 +0100 +++ b/drivers/cpufreq/cpufreq_ondemand.c Mon Oct 29 12:39:23 2007 -0500 @@ -96,6 +96,7 @@ static inline cputime64_t get_cpu_idle_t return...

...TAL PAGE FAULT (XEN) [error_code=0000] (XEN) Faulting linear address: 0000000000000051 (XEN) **************************************** (XEN) Signed-off-by: Ian Campbell <ian.campbell@citrix.com> Cc: Winston Wang <winston.l.wang@intel.com> Cc: Gang Wei <gang.wei@intel.com> Cc: Mark Langsdorf <mark.langsdorf@amd.com> Cc: Jan Beulich <jbeulich@suse.com> diff -r 955a6c07dc5e -r 3cfb8f2c4ce8 xen/drivers/cpufreq/utility.c --- a/xen/drivers/cpufreq/utility.c Tue Oct 18 10:33:32 2011 +0100 +++ b/xen/drivers/cpufreq/utility.c Tue Nov 15 11:28:17 2011 +0000 @@ -396,7 +396,7 @@ void...

Could anyone summarize what the support status of cpu frequency changes is at present. I don''t seem to recall generic changes to the hpyervisor in that respect, but the linux tree has fairly extensive changes to the powernow-k8 driver (which would make sense to me only if all other cpufreq drivers are fully supported now, too). Thanks, Jan

...l cpus with the getcpuinfo sysctl hypercall. Caveat 2: Even though the clock multipliers are being scaled and recorded correctly in both dom0 and the hypervisor, time errors appear immediately after a frequency change. They are not more likely when the frequency is constant. Signed-off-by: Mark Langsdorf <mark.langsdorf@amd.com> diff -r 256160ff19b7 xen/arch/x86/platform_hypercall.c --- a/xen/arch/x86/platform_hypercall.c Thu Aug 16 13:27:59 2007 +0100 +++ b/xen/arch/x86/platform_hypercall.c Thu Aug 30 12:08:29 2007 -0500 @@ -252,6 +252,13 @@ ret_t do_platform_op(XEN_GUEST_HANDLE(xe...

...hat highlights a cpu hotplug locking issue in the ondemand cpufreq governor. It is only a warning message and the scope of the changes to properly surpress it is a bit large to add to the Xen 2.6.18.8 kernel. I will backport them if people think that''s a better idea. Signed-off-by: Mark Langsdorf <mark.langsdorf@amd.com> diff -r d827dfc6593e arch/i386/kernel/cpu/cpufreq/powernow-k8.c --- a/arch/i386/kernel/cpu/cpufreq/powernow-k8.c Thu Nov 01 09:07:45 2007 -0600 +++ b/arch/i386/kernel/cpu/cpufreq/powernow-k8.c Fri Nov 02 16:41:22 2007 -0500 @@ -46,7 +46,7 @@ #define PFX "power...

...systems, dom0_vcpus_pin is strongly advised. Caveat 3: Even though the clock multipliers are being scaled and recorded correctly in both dom0 and the hypervisor, time errors appear immediately after a frequency change. They are not more likely when the frequency is constant. Signed-off-by: Mark Langsdorf <mark.langsdorf@amd.com> diff -r 05c22f282023 arch/i386/kernel/time-xen.c --- a/arch/i386/kernel/time-xen.c Tue Aug 14 16:20:55 2007 +0100 +++ b/arch/i386/kernel/time-xen.c Tue Aug 28 14:55:24 2007 -0500 @@ -50,6 +50,7 @@ #include <linux/percpu.h> #include <linux/kernel_stat.h>...

it seems getting lost, and thus resend. Thanks, Kevin -----Original Message----- From: Tian, Kevin Sent: 2008年7月24日 8:39 To: ''Jan Beulich'' Cc: Liu, Jinsong; Keir Fraser; xen-devel@lists.xensource.com; mark.langsdorf@amd.com Subject: RE: [Xen-devel] cpufreq info propagation >From: Jan Beulich >Sent: 2008年7月23日 18:13 >> >>startup info is viable. But how fragile is the cmdline option? > >If the user passes an option like this manually, depending on the >particular kernel version'...

Does Xen 3.0.0 actually support the IOMMU on x86_64? I''ve tried building with a couple of different configurations, and it always fails if I''ve enabled CONFIG_GART_IOMMU. The problems center around undefined references to functions such as dma_alloc_coherent, dma_free_coherent, iommu_setup, iommu_hole_init, force_iommu, iommu_aperture_allowed, and so on. In all cases, changing

At what point is safe to call read_pci_config() in dom0 on x86_64? I''m trying to enable AGP as IOMMU support, and iommu_hole_init() is crashing on the read_pci_config() calls. -Mark Langsdorf AMD, Inc. _______________________________________________ Xen-devel mailing list Xen-devel@lists.xensource.com http://lists.xensource.com/xen-devel

Hi, Does Xen provide support for CPU frequency scaling? If there exists such support, from which version they support it? Otherwise what problems do exist in support frequency scaling in Xen? Thanks, Vahid _______________________________________________ Xen-devel mailing list Xen-devel@lists.xensource.com http://lists.xensource.com/xen-devel

Hi! Attached patch makes xen-tools and stubdom-dm going independent from hardcoded pathes. It is no possible to install into /usr/local or any other non-default directory and use it out-of-the box. This allows us to have different Xen versions in different directories, simplifies packaging for distributions. It also finds ''hvmloader'' and