CPU frequency governor problem

CPU frequency governor problem

[Edward Statham]

Hi, sorry for the direct email but I’ve been unable to find a resolution
to this in forums etc.  I have a laptop with a Intel i7-7700HQ CPU and am
running Linux Mint 18.  The frequency governor is set to performance but
it keeps on throttling down to 70% or even 50% and getting stuck there,
for example:

cat /sys/devices/system/cpu/intel_pstate/max_perf_pct
70

I can’t find a way to get it to throttle sensibly i.e. lower the max
when required but revert to full speed when other conditions allow. I’ve
tried the ondemand and performance governors.

Any suggestions would be much appreciated.

thanks,
Ed

Re: CPU frequency governor problem

[Viresh Kumar]

Adding PM list instead.

On Tue, Aug 15, 2017 at 8:17 AM, Edward Statham
<edward.statham@gmail.com> wrote:
> Hi, sorry for the direct email but I’ve been unable to find a resolution
> to this in forums etc.  I have a laptop with a Intel i7-7700HQ CPU and am
> running Linux Mint 18.  The frequency governor is set to performance but
> it keeps on throttling down to 70% or even 50% and getting stuck there,
> for example:
>
> cat /sys/devices/system/cpu/intel_pstate/max_perf_pct
> 70
>
> I can’t find a way to get it to throttle sensibly i.e. lower the max
> when required but revert to full speed when other conditions allow. I’ve
> tried the ondemand and performance governors.
>
> Any suggestions would be much appreciated.
>
> thanks,
> Ed
> --
> To unsubscribe from this list: send the line "unsubscribe cpufreq" in
> the body of a message to majordomo@vger.kernel.org
> More majordomo info at  http://vger.kernel.org/majordomo-info.html

Re: CPU frequency governor problem

[Edward Statham]

Some further info - the same behavior occurs with the powersave governor.
It just locks at a low frequency, disables turbo and stays there.

Immediately after reboot:

System:    Host: ed-P35V7 Kernel: 4.11.0-14-generic x86_64 (64 bit gcc: 5.4.0)
           Desktop: Cinnamon 3.4.6 (Gtk 3.18.9-1ubuntu3.3) Distro:
Linux Mint 18.2 Sonya
Machine:   Mobo: GIGABYTE model: P35V7 v: Default string Bios:
American Megatrends v: FB02 date: 11/29/2016
CPU:       Quad core Intel Core i7-7700HQ (-HT-MCP-) cache: 6144 KB
           flags: (lm nx sse sse2 sse3 sse4_1 sse4_2 ssse3 vmx) bmips: 22464
           clock speeds: max: 3800 MHz 1: 799 MHz 2: 799 MHz 3: 799
MHz 4: 799 MHz 5: 799 MHz 6: 799 MHz
           7: 799 MHz 8: 799 MHz
Graphics:  Card-1: Intel Device 591b bus-ID: 00:02.0
           Card-2: NVIDIA Device 1ba1 bus-ID: 01:00.0
           Display Server: X.Org 1.18.4 driver: nvidia Resolution:
1920x1080@59.93hz
           GLX Renderer: GeForce GTX 1070/PCIe/SSE2 GLX Version: 4.5.0
NVIDIA 384.59 Direct Rendering: Yes
Audio:     Card Intel Sunrise Point-H HD Audio driver: snd_hda_intel
bus-ID: 00:1f.3
           Sound: Advanced Linux Sound Architecture v: k4.11.0-14-generic
Network:   Card-1: Realtek RTL8111/8168/8411 PCI Express Gigabit
Ethernet Controller
           driver: r8169 v: 2.3LK-NAPI port: d000 bus-ID: 02:00.0
           IF: enp2s0 state: up speed: 1000 Mbps duplex: full mac: <filter>
           Card-2: Intel Wireless 8260 driver: iwlwifi bus-ID: 04:00.0
           IF: wlp4s0 state: down mac: <filter>
Drives:    HDD Total Size: 1000.2GB (17.7% used) ID-1: /dev/nvme0n1
model: N/A size: 512.1GB
           ID-2: /dev/sda model: HGST_HTS721010A9 size: 1000.2GB
Partition: ID-1: / size: 30G used: 11G (37%) fs: ext4 dev: /dev/nvme0n1p1
           ID-2: /home size: 184G used: 54G (31%) fs: ext4 dev: /dev/nvme0n1p6
           ID-3: swap-1 size: 32.00GB used: 0.00GB (0%) fs: swap dev:
/dev/nvme0n1p5
RAID:      No RAID devices: /proc/mdstat, md_mod kernel module present
Sensors:   System Temperatures: cpu: 53.5C mobo: 29.8C gpu: 0.0:65C
           Fan Speeds (in rpm): cpu: N/A
Info:      Processes: 376 Uptime: 4 min Memory: 4053.5/32055.0MB Init:
systemd runlevel: 5 Gcc sys: 5.4.0
           Client: Shell (bash 4.3.481) inxi: 2.2.35

On 16 August 2017 at 15:18, Viresh Kumar <viresh.kumar@linaro.org> wrote:
> Adding PM list instead.
>
> On Tue, Aug 15, 2017 at 8:17 AM, Edward Statham
> <edward.statham@gmail.com> wrote:
>> Hi, sorry for the direct email but I’ve been unable to find a resolution
>> to this in forums etc.  I have a laptop with a Intel i7-7700HQ CPU and am
>> running Linux Mint 18.  The frequency governor is set to performance but
>> it keeps on throttling down to 70% or even 50% and getting stuck there,
>> for example:
>>
>> cat /sys/devices/system/cpu/intel_pstate/max_perf_pct
>> 70
>>
>> I can’t find a way to get it to throttle sensibly i.e. lower the max
>> when required but revert to full speed when other conditions allow. I’ve
>> tried the ondemand and performance governors.
>>
>> Any suggestions would be much appreciated.
>>
>> thanks,
>> Ed
>> --
>> To unsubscribe from this list: send the line "unsubscribe cpufreq" in
>> the body of a message to majordomo@vger.kernel.org
>> More majordomo info at  http://vger.kernel.org/majordomo-info.html

Re: CPU frequency governor problem

[Edward Statham]

I have more details on this problem. I have a laptop that is prone to
overheating.
I have now fitted 3 external fans, and the problem has considerably
lessened - the max frequency is lowered but when the core temp drops
back
then it re-scales up to max again.
However - if the "no_turbo" flag is set true then it sticks there on
70% max (sometimes 50%) and no_turbo=1 and stays there
regardless of subsequent core temp. Only a reboot clears it.

HTH


On 22 August 2017 at 12:12, Edward Statham <edward.statham@gmail.com> wrote:
> Some further info - the same behavior occurs with the powersave governor.
> It just locks at a low frequency, disables turbo and stays there.
>
> Immediately after reboot:
>
> System:    Host: ed-P35V7 Kernel: 4.11.0-14-generic x86_64 (64 bit gcc: 5.4.0)
>            Desktop: Cinnamon 3.4.6 (Gtk 3.18.9-1ubuntu3.3) Distro:
> Linux Mint 18.2 Sonya
> Machine:   Mobo: GIGABYTE model: P35V7 v: Default string Bios:
> American Megatrends v: FB02 date: 11/29/2016
> CPU:       Quad core Intel Core i7-7700HQ (-HT-MCP-) cache: 6144 KB
>            flags: (lm nx sse sse2 sse3 sse4_1 sse4_2 ssse3 vmx) bmips: 22464
>            clock speeds: max: 3800 MHz 1: 799 MHz 2: 799 MHz 3: 799
> MHz 4: 799 MHz 5: 799 MHz 6: 799 MHz
>            7: 799 MHz 8: 799 MHz
> Graphics:  Card-1: Intel Device 591b bus-ID: 00:02.0
>            Card-2: NVIDIA Device 1ba1 bus-ID: 01:00.0
>            Display Server: X.Org 1.18.4 driver: nvidia Resolution:
> 1920x1080@59.93hz
>            GLX Renderer: GeForce GTX 1070/PCIe/SSE2 GLX Version: 4.5.0
> NVIDIA 384.59 Direct Rendering: Yes
> Audio:     Card Intel Sunrise Point-H HD Audio driver: snd_hda_intel
> bus-ID: 00:1f.3
>            Sound: Advanced Linux Sound Architecture v: k4.11.0-14-generic
> Network:   Card-1: Realtek RTL8111/8168/8411 PCI Express Gigabit
> Ethernet Controller
>            driver: r8169 v: 2.3LK-NAPI port: d000 bus-ID: 02:00.0
>            IF: enp2s0 state: up speed: 1000 Mbps duplex: full mac: <filter>
>            Card-2: Intel Wireless 8260 driver: iwlwifi bus-ID: 04:00.0
>            IF: wlp4s0 state: down mac: <filter>
> Drives:    HDD Total Size: 1000.2GB (17.7% used) ID-1: /dev/nvme0n1
> model: N/A size: 512.1GB
>            ID-2: /dev/sda model: HGST_HTS721010A9 size: 1000.2GB
> Partition: ID-1: / size: 30G used: 11G (37%) fs: ext4 dev: /dev/nvme0n1p1
>            ID-2: /home size: 184G used: 54G (31%) fs: ext4 dev: /dev/nvme0n1p6
>            ID-3: swap-1 size: 32.00GB used: 0.00GB (0%) fs: swap dev:
> /dev/nvme0n1p5
> RAID:      No RAID devices: /proc/mdstat, md_mod kernel module present
> Sensors:   System Temperatures: cpu: 53.5C mobo: 29.8C gpu: 0.0:65C
>            Fan Speeds (in rpm): cpu: N/A
> Info:      Processes: 376 Uptime: 4 min Memory: 4053.5/32055.0MB Init:
> systemd runlevel: 5 Gcc sys: 5.4.0
>            Client: Shell (bash 4.3.481) inxi: 2.2.35
>
> On 16 August 2017 at 15:18, Viresh Kumar <viresh.kumar@linaro.org> wrote:
>> Adding PM list instead.
>>
>> On Tue, Aug 15, 2017 at 8:17 AM, Edward Statham
>> <edward.statham@gmail.com> wrote:
>>> Hi, sorry for the direct email but I’ve been unable to find a resolution
>>> to this in forums etc.  I have a laptop with a Intel i7-7700HQ CPU and am
>>> running Linux Mint 18.  The frequency governor is set to performance but
>>> it keeps on throttling down to 70% or even 50% and getting stuck there,
>>> for example:
>>>
>>> cat /sys/devices/system/cpu/intel_pstate/max_perf_pct
>>> 70
>>>
>>> I can’t find a way to get it to throttle sensibly i.e. lower the max
>>> when required but revert to full speed when other conditions allow. I’ve
>>> tried the ondemand and performance governors.
>>>
>>> Any suggestions would be much appreciated.
>>>
>>> thanks,
>>> Ed
>>> --
>>> To unsubscribe from this list: send the line "unsubscribe cpufreq" in
>>> the body of a message to majordomo@vger.kernel.org
>>> More majordomo info at  http://vger.kernel.org/majordomo-info.html

Re: CPU frequency governor problem

[Edward Statham]

hi, just thought I'd let you know:
I just upgraded to kernel 4.13 from 4.11 and the problem is resolved.


On 31 October 2017 at 11:15, Edward Statham <edward.statham@gmail.com> wrote:
> I have more details on this problem. I have a laptop that is prone to
> overheating.
> I have now fitted 3 external fans, and the problem has considerably
> lessened - the max frequency is lowered but when the core temp drops
> back
> then it re-scales up to max again.
> However - if the "no_turbo" flag is set true then it sticks there on
> 70% max (sometimes 50%) and no_turbo=1 and stays there
> regardless of subsequent core temp. Only a reboot clears it.
>
> HTH
>
>
> On 22 August 2017 at 12:12, Edward Statham <edward.statham@gmail.com> wrote:
>> Some further info - the same behavior occurs with the powersave governor.
>> It just locks at a low frequency, disables turbo and stays there.
>>
>> Immediately after reboot:
>>
>> System:    Host: ed-P35V7 Kernel: 4.11.0-14-generic x86_64 (64 bit gcc: 5.4.0)
>>            Desktop: Cinnamon 3.4.6 (Gtk 3.18.9-1ubuntu3.3) Distro:
>> Linux Mint 18.2 Sonya
>> Machine:   Mobo: GIGABYTE model: P35V7 v: Default string Bios:
>> American Megatrends v: FB02 date: 11/29/2016
>> CPU:       Quad core Intel Core i7-7700HQ (-HT-MCP-) cache: 6144 KB
>>            flags: (lm nx sse sse2 sse3 sse4_1 sse4_2 ssse3 vmx) bmips: 22464
>>            clock speeds: max: 3800 MHz 1: 799 MHz 2: 799 MHz 3: 799
>> MHz 4: 799 MHz 5: 799 MHz 6: 799 MHz
>>            7: 799 MHz 8: 799 MHz
>> Graphics:  Card-1: Intel Device 591b bus-ID: 00:02.0
>>            Card-2: NVIDIA Device 1ba1 bus-ID: 01:00.0
>>            Display Server: X.Org 1.18.4 driver: nvidia Resolution:
>> 1920x1080@59.93hz
>>            GLX Renderer: GeForce GTX 1070/PCIe/SSE2 GLX Version: 4.5.0
>> NVIDIA 384.59 Direct Rendering: Yes
>> Audio:     Card Intel Sunrise Point-H HD Audio driver: snd_hda_intel
>> bus-ID: 00:1f.3
>>            Sound: Advanced Linux Sound Architecture v: k4.11.0-14-generic
>> Network:   Card-1: Realtek RTL8111/8168/8411 PCI Express Gigabit
>> Ethernet Controller
>>            driver: r8169 v: 2.3LK-NAPI port: d000 bus-ID: 02:00.0
>>            IF: enp2s0 state: up speed: 1000 Mbps duplex: full mac: <filter>
>>            Card-2: Intel Wireless 8260 driver: iwlwifi bus-ID: 04:00.0
>>            IF: wlp4s0 state: down mac: <filter>
>> Drives:    HDD Total Size: 1000.2GB (17.7% used) ID-1: /dev/nvme0n1
>> model: N/A size: 512.1GB
>>            ID-2: /dev/sda model: HGST_HTS721010A9 size: 1000.2GB
>> Partition: ID-1: / size: 30G used: 11G (37%) fs: ext4 dev: /dev/nvme0n1p1
>>            ID-2: /home size: 184G used: 54G (31%) fs: ext4 dev: /dev/nvme0n1p6
>>            ID-3: swap-1 size: 32.00GB used: 0.00GB (0%) fs: swap dev:
>> /dev/nvme0n1p5
>> RAID:      No RAID devices: /proc/mdstat, md_mod kernel module present
>> Sensors:   System Temperatures: cpu: 53.5C mobo: 29.8C gpu: 0.0:65C
>>            Fan Speeds (in rpm): cpu: N/A
>> Info:      Processes: 376 Uptime: 4 min Memory: 4053.5/32055.0MB Init:
>> systemd runlevel: 5 Gcc sys: 5.4.0
>>            Client: Shell (bash 4.3.481) inxi: 2.2.35
>>
>> On 16 August 2017 at 15:18, Viresh Kumar <viresh.kumar@linaro.org> wrote:
>>> Adding PM list instead.
>>>
>>> On Tue, Aug 15, 2017 at 8:17 AM, Edward Statham
>>> <edward.statham@gmail.com> wrote:
>>>> Hi, sorry for the direct email but I’ve been unable to find a resolution
>>>> to this in forums etc.  I have a laptop with a Intel i7-7700HQ CPU and am
>>>> running Linux Mint 18.  The frequency governor is set to performance but
>>>> it keeps on throttling down to 70% or even 50% and getting stuck there,
>>>> for example:
>>>>
>>>> cat /sys/devices/system/cpu/intel_pstate/max_perf_pct
>>>> 70
>>>>
>>>> I can’t find a way to get it to throttle sensibly i.e. lower the max
>>>> when required but revert to full speed when other conditions allow. I’ve
>>>> tried the ondemand and performance governors.
>>>>
>>>> Any suggestions would be much appreciated.
>>>>
>>>> thanks,
>>>> Ed
>>>> --
>>>> To unsubscribe from this list: send the line "unsubscribe cpufreq" in
>>>> the body of a message to majordomo@vger.kernel.org
>>>> More majordomo info at  http://vger.kernel.org/majordomo-info.html