similar to: centos 7: trouble setting the ondemand governor

Hi, This has been a problem since the xen-acpi-processor code was added to the kernel source. I wasn''t sure if the problem I was seeing was related to the old version (4.1.2) of Xen that I was using but now I''m on 4.2.0 and it still exists I thought I would check if I have a misconfiguration or if I have discovered a problem. My system is a dual AMD Opteron(tm) Processor

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,

Back in c/s 18950 the default cpufreq governor was set to userspace (it had previously been performance). However, since there is no supplied userspace program or script that will change the frequency this is at best a no-op. Worse, on some hardware with some BIOS revisions, this actually sets the CPUs running at their lowest frequency rather than their highest and there is a corresponding

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

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

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).

On 8/14/20 12:20 PM, Richard W.M. Jones wrote: > This creates filesystems on demand. A client simply connects with a > desired export name and a new export is created. The export is > persistent (until deleted by the server admin), and clients may > disconnect and reconnect. In some respects this is similar to the > nbdkit-tmpdisk-plugin, or nbdkit-file-plugin with the dir=

We have a lot of diskless Linux clients which are booting via PXELINUX or ETHERBOOT. The problem is that they are on for 24 hours and APM PowerSave mode works for ETHERBOOT only. But in the future we want to use PXELINUX only, which seems to have no features for APM or ACPI PowerSave included. Would it be possible to integrate such features in PXELINUX or is there a way to boot a special image

hi, twice in the last week I've been caught out where the laptop was running tuned with 'throughput-performance' profile on the work table, and I walked away, carried on working - and had the battery run flat in just over an hour. Compare this with tuned running the 'powersave' profile - will usually take the battery through to 3hrs+ - and if i just totally turn down the

On Sat, Aug 15, 2020 at 03:41:39PM -0500, Eric Blake wrote: > On 8/14/20 12:20 PM, Richard W.M. Jones wrote: > >+Similar plugins include L<nbdkit-file-plugin(1)> which can serve a > >+predefined set of exports (clients cannot create more), > > Hmm - I wonder if it is worth a filter that runs a script any time > an .open fails. That script could send email to an

This creates filesystems on demand. A client simply connects with a desired export name and a new export is created. The export is persistent (until deleted by the server admin), and clients may disconnect and reconnect. In some respects this is similar to the nbdkit-tmpdisk-plugin, or nbdkit-file-plugin with the dir= option. --- plugins/ondemand/nbdkit-ondemand-plugin.pod | 190 ++++++

Question: Should the new directory= parameter of the file plugin be "dir="? It's shorter. It's also consistent with the plugins floppy, iso, linuxdisk, and of course ondemand ... Rich. -- Richard Jones, Virtualization Group, Red Hat http://people.redhat.com/~rjones Read my programming and virtualization blog: http://rwmj.wordpress.com virt-p2v converts physical machines to

Hi, Is there any documentation on enabling hypervisor support for both C and P-state control? On xen-unstable and linux-2.6.18-xen.hg, if I enable cpuidle=1 on the xen command line and then run xenpm, I will get output for C-states (shown below) but it complains that "Xen cpufreq is not enabled!" cpu id : 0 total C-states : 2 idle time(ms) : 73264 C0

Hey Y'all, I'm trying to turn off the kernel screen blanker that shuts off the video after about 10 minutes of inactivity at the keyboard. After extensive googling I've found two ways to *NOT* do it. In my home .xinitrc setterm -blank 0 -powersave off -powerdown 0 xset s off In /etc/rc.local /usr/bin/setterm -powersave off -blank 0 I've tried both to no effect. Of course

I've been playing and comparing frequency scaling between AMD and Intel CPUs yesterday and there seem to be great differences between AMD and Intel and some gotchas. This is all on CentOS 5.2 with latest Xen kernels (which are supposed to be powersaving-enabled since 5.2). AMD: It seems once I get the AMD CPU to use the ondemand governor it works very well and very efficiently. But this

Hi everyone, When I set CONFIG_ACPI_PROCESSOR, CONFIG_CPU_IDLE and CONFIG_INTEL_IDLE to y then I cannot boot Xen; there is a crash. If I turn CONFIG_INTEL_IDLE off then the boot goes well and, after dom0 has booted, xenpm works and gives some sane output, see below. I have tested this with kernels 3.2 to 3.4.6. Is it impossible to use INTEL_IDLE with Xen? If this is a known issue then maybe

Hi everyone, When I set CONFIG_ACPI_PROCESSOR, CONFIG_CPU_IDLE and CONFIG_INTEL_IDLE to y then I cannot boot Xen; there is a crash. If I turn CONFIG_INTEL_IDLE off then the boot goes well and, after dom0 has booted, xenpm works and gives some sane output, see below. I have tested this with kernels 3.2 to 3.4.6. Is it impossible to use INTEL_IDLE with Xen? If this is a known issue then maybe

With some progress in PowerManagement support (there's a patch nearly done for reading the P-tables, written mostly by xexaxo, derived from thunderbirds nvclock, with 0x40 adjustments from myself) in my opinion it's time to think about the user aspect of this. My personal idea for GPU scaling was similar to that of CPU scaling in appearance eventually. When you look at the cpufreq-applet