search for: governors

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

...ailable and modprobed? - Trying to set an invalid policy? - Trying to set a specific frequency, but userspace governor is not available, for example because of hardware which cannot be set to a specific frequency or because the userspace governor isn't loaded? The ondemand and powersave governors work ok (powersave is the default when the host boots). Some diagnosis: $ grep ONDEMAND /boot/config-3.10.0-123.el7.x86_64 CONFIG_CPU_FREQ_DEFAULT_GOV_ONDEMAND=y CONFIG_CPU_FREQ_GOV_ONDEMAND=y $ cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_available_governors performance powersave So appare...

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 f...

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

I have xeons 5520 how do I configure xen 4.3 to lower cpu clocks ? cpufreq=dom0-kernel cpuidle I read power management under xen wiki but command xenpm set-scaling-governor ondeman Gives [CPU0] failed to set governor name (19 - No such device) [CPU1] failed to set governor name (19 - No such device) [CPU2] failed to set governor name (19 - No such device) [CPU3] failed to set governor name (19

I''ve a problem with managing power consumption on Intel Nehalem CPU. I''ve installed Xen 3.4 on our Dell PowerEdge T610 system on a Ubuntu 9.04 distribution. I recompiled the kernel 2.6.30rc5. Now I can see the c-states of the CPUs but no access to P-states information and the frequency scaling does not work. By the way, if I run the kernel 2.6.28.13 which is the last one

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

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>

...112635.38 132596.69 +17.7% 1000 171240.40 240369.80 +40.4% 1500 130507.53 324436.74 +148.6% 2000 175972.93 341637.01 +94.1% With the qspinlock patch, there wasn't too much difference in performance between the 2 scaling governors. Without this patch, the powersave governor was much slower than the performance governor. By disabling the intel_pstate driver and use acpi_cpufreq instead, the benchmark performance (JPM) at 1000 users level for the performance and ondemand governors were: Governor 3.19 3.19-...

...112635.38 132596.69 +17.7% 1000 171240.40 240369.80 +40.4% 1500 130507.53 324436.74 +148.6% 2000 175972.93 341637.01 +94.1% With the qspinlock patch, there wasn't too much difference in performance between the 2 scaling governors. Without this patch, the powersave governor was much slower than the performance governor. By disabling the intel_pstate driver and use acpi_cpufreq instead, the benchmark performance (JPM) at 1000 users level for the performance and ondemand governors were: Governor 3.19 3.19-...

Hi list, I'm using C7 and noticed that cpu freq is enabled with governor conservative. I've used cpupower utils for governor change, but at the next boot it restart with conservative governor. I've tried also to start cpupower service and setting OPT in /etc/sysconfig/cpupower but it does not works. Can someone point me in the right direction? Thanks in advance

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 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 ---

Existing credit scheduler is not power aware. To achieve better power saving ability with negligible performance impact, following areas may be tweaked and listed here for comments first. Goal is not to silly save power with sacrifice of performance, e.g. we don''t want to prevent migration when there''re free cpus with some pending runqueues. But when free computing power is

...ning is disabled? What is the point of enabling dynamic tuning, especially when using the supplied profiles like throughput-performance? I haven't customized those by specifying any thresholds, and I don't see any point in doing things like dynamically changing disk schedulers or CPU governors depending on something recognized by tuned. Why is there no measurable difference in power consumption between using the powersave, throughput-performance and virtual-host profiles but a very noticeable difference in performance? The difference in performance appears to depend mainly on which...

After upgrade my laptop, I discovered a low performance on it. The laptop is a 2,73GHz Intel centrino and from some kernels versions to now, it had a good performance, the cpu scaling worked fine. Now, I discover that forcing in /etc/sysconfig/cpuspeed the governors and/or max/min speeds, it don't want to run more quickly. The laptop boots fine with the correct speed (usual speed), but when the init scripts run the service cpuspeed, the performance goes low: Only wants 800MHz!! Yes, I played with the documentation and the values on it, but the problem be...

Hello I'm building a router/proxy/firewall, the default governor is ondemand, but for this application, what governor is best suited? (for example conservative?) Thanks at all! Best regards

On 09/23/2017 03:52 AM, hw wrote: > Thank you very much for the notice!? Looking at a couple machines, I found > that the automatic choice of profile isn?t what I would want. > > Now I wonder how everyone deals with this, i. e. do you set a profile once > and never change it, or do you keep changing the profile according to > circumstances?? Is changing it even advisable, i. e.

Specifically, what values are or aren''t accepted as CPU identifier, and how the values get interpreted should be consistent across sub-commands (intended behavior now: non-negative values are okay, and along with omitting the argument, specifying "all" will also be accepted). For error handling, error messages should get consistently issued to stderr, and the tool should now

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