similar to: [PATCH] Change default cpufreq governor to ondemand

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 ---

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. Otherwise, use basically the same scheme as native Linux. Signed-off-by: Mark Langsdorf <mark.langsdorf@amd.com> iff -r 9bf1ddd0f6bf

Hi, The default "stop" action for the cpupower service seems to be to set the ondemand governor, but this fails. I can reproduce the issue directly by running cpupower: $ sudo cpupower frequency-set -g ondemand Setting cpu: 0 Error setting new values. Common errors: - Do you have proper administration rights? (super-user?) - Is the governor you requested available and modprobed? -

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

Add cpufreq governors: performance, powersave, userspace This patch add 3 more governors beside original running ondemand cpufreq governor. performance governor is with best performance, keeping cpu always running at highest freq; powersave governor is with best power save effect, keeping cpu always running at lowest freq; userspace governor provide user setting freq ability; Signed-off-by: Liu,

Set userspace governor as default, which stays same effect as when cpufreq in xen is not enabled. As a result, enable cpufreq in xen by default to avoid reboot to activate cpufreq. Now it''s always on but w/o performance impact if user doesn''t tempt to change governor. We also add some warning info for debug. Signed-off-by: Liu, Jinsong <jinsong.liu@intel.com>

Hi all :) I''ve tested this and having a cpufreq that slows down the CPU affects the rate of HTB. My ondemand cpufreq governor scales down the CPU frequency about 40% and this is more or less the slowdown the rate suffers, 40%. Any known way of dealing with this without having to disable cpufreq? Thanks in advance :) Ra?l N??ez de Arenas Coronado -- Linux Registered

[I sent this to the RHEL4 list - but maybe someone on this list knows more] I have a number of dual CPU and dual CPU/dual core Opteron systems that are used as compute servers. In an effort to reduce power consumption and reduce heat output, I would like to make use of the PowerNow! capabilities to clock back the CPUs when the machines are idle. These machines are running a 2.6.9-42 RHEL4 kernel

Hi: I downloaded Xen 3.3.1 source from xen.org, compiled and installed it on CentOS 5. At first boot into xen, I got an error message about tls and told me to use "mv /lib/tls /lib/tls.disabled" to disable it. I issued that command after the first boot. And also tried to remove that directory to /root. But after that, I still got the same error message about tls  when booting into Xen.

This fixes an actual bug (failure to exit from a function after an allocation failure), an inconsistency (not removing the cpufreq_dom list member upon failure), and a latent bug (not clearing the current governor upon governor initialization failure when there was no old one; latent because the only current code path leading to this situation frees the policy upon failure and hence the governor

Enable cpufreq support in Xen for AMD Operton processors by: 1) Allowing the PowerNow! driver in dom0 to write to the PowerNow! MSRs. 2) Adding the cpufreq notifier chain to time-xen.c in dom0. On a frequency change, a platform hypercall is performed to scale the frequency multiplier in the hypervisor. 3) Adding a platform hypercall to the hypervisor the scale the frequency multiplier and reset

Hi , I am getting the delay in pinging (from different network) , the guest after live migration . Here is the scenario: 0. OS : RHEL5.4 86_64 1. Host-A. Port eth1 , it is trunked with three subnets xxx.xx.15.xxx xxx.xx.16.xxx xxx.xx.17.xxx Guest created on 15, 16 ,17 subnets. Gust15-A created on subnet 15 Gust16-A

Hello list, I want to use shared volumes between severall vm''s and defenetly don''t want to use NFS or Samba! So i have three options: 1. simulated(software-) iscsi 2. GFS 3. OCFS2 What do you suggest and why? Kind regards, Florian ********************************************************************************************** IMPORTANT: The contents of this email and any

Hello, Using kernel: 2.6.18-92.1.13.el5.centos.plus the cpu throttling works as desired (see 2 traces below) ------------- trace snips -------------- dmesg | grep -i pow ACPI: SSDT (v001 PTLTD POWERNOW 0x00000001 LTP 0x00000001) @ 0x3fff9b40 powernow-k8: Found 1 AMD Athlon(tm) 64 X2 Dual Core Processor 4600+ processors ( 2 cpu cores) (version 2.20.00) powernow-k8: 0 :

On 03/25/2015 03:47 PM, Konrad Rzeszutek Wilk wrote: > On Mon, Mar 16, 2015 at 02:16:13PM +0100, Peter Zijlstra wrote: >> Hi Waiman, >> >> As promised; here is the paravirt stuff I did during the trip to BOS last week. >> >> All the !paravirt patches are more or less the same as before (the only real >> change is the copyright lines in the first patch).

On 03/25/2015 03:47 PM, Konrad Rzeszutek Wilk wrote: > On Mon, Mar 16, 2015 at 02:16:13PM +0100, Peter Zijlstra wrote: >> Hi Waiman, >> >> As promised; here is the paravirt stuff I did during the trip to BOS last week. >> >> All the !paravirt patches are more or less the same as before (the only real >> change is the copyright lines in the first patch).

virt-p2v was able to convert my centOS 5.2 physical machine to xen virtual machine and it runs great. Now, I am working on to convert this full virt machine to para virt . Under my domU i have installed kernel-xen (since it is needed ) , and edited my grub menu to use the installed kernel. My grub menu file in domU looks like: ---- kernel /vmlinuz-2.6.18-92.1.17.el5xen ro

Hi. Im looking how to vinculate directly the dom0 tty1 or tty7 to my domU. The idea is provide to the sysadmin a "direct Access" to the domU. Is possible do that? Thanks in advance _______________________________________________ Xen-users mailing list Xen-users@lists.xensource.com http://lists.xensource.com/xen-users

I am seeing random reboots after installing Xen 3.2.1 (running with linux-2.6.18-8 pulled from a few days ago). So far, the reboots only happen if I have enabled cpufreq=dom0-kernel and actually run frequency scaling (such as with the ondemand governor). The reboots only happen after a few hours. The machines seem to be stable if I pass the cpufreq option to Xen but disable frequency scaling. I

Hi Renato, I'm playing with A15 bots too (running Ubuntu). This is probably what you want to have predictable performance: Disable auto-resetting the CPU scaling governor to ondemand: sudo update-rc.d -f ondemand remove Then add this to /etc/rc.local: # Disable power management. for cpu in `find /sys/devices/system/cpu/cpu*/cpufreq/scaling_governor`; do echo performance > $cpu