You are not logged in.
graysky wrote:...but does the tick rate or delay help with your freq?
For me no I have tried default kernel with HZ=1000Hz (not BLD this time) it didn't help. Setting the delay to 20 on HZ=1000Hz have helped a little bit - the CPU goes some time to ~2GHz. With GPU do you have?
Using the onboard GPU here.
tested fedora config: frequency downscale correctly
If you boot into this kernel. Leave the machine idle and do this for 4-5 min. Post the result.
Last edited by graysky (2015-02-28 02:31:23)
CPU-optimized Linux-ck packages @ Repo-ck • AUR packages • Zsh and other configs
Offline
dragonn wrote:graysky wrote:...but does the tick rate or delay help with your freq?
For me no I have tried default kernel with HZ=1000Hz (not BLD this time) it didn't help. Setting the delay to 20 on HZ=1000Hz have helped a little bit - the CPU goes some time to ~2GHz. With GPU do you have?
Using the onboard GPU here.
max.bra wrote:tested fedora config: frequency downscale correctly
If you boot into this kernel. Leave the machine idle and do this for 4-5 min. Post the result.
Maybe it is the difference because most of us use Nvidia GPU as I see in this thread? Hard to see, maybe some one will test it and change for a test to the onboard GPU.
Offline
Maybe it is the difference because most of us use Nvidia GPU as I see in this thread? Hard to see, maybe some one will test it and change for a test to the onboard GPU.
already done, stock kernel + nouveau + xorg session. no difference with 10 and 19ms sample. 2-3 mins log with ~3840Mhz median.
the way was good but nothing to do...
Edit:
If you boot into this kernel. Leave the machine idle and do this for 4-5 min. Post the result.
tomorrow i will do it for sure
Last edited by max.bra (2015-02-28 11:46:50)
Offline
more time, more tests and better report
kernel median counts
Arch Stock, 10ms sample, nvidia xorg 3785 1260
Arch Stock, 10ms sample, nouveau xorg 3856 1200
Arch Stock, 10ms sample, tty 3623 1388
Arch Stock, 19ms sample, nvidia xorg 3606 1536
Arch Stock, 19ms sample, nouveau xorg 3795 1216
Arch Stock, 19ms sample, tty 1296 1124
Arch 1000Hz, nvidia xorg 3484 1344
Arch 1000Hz, nouveau xorg 3767 1568
Arch 1000Hz, tty 900 1788
Fedora config, nvidia xorg 2502 1480
Fedora config, nouveau xorg 3320 1328
Fedora config, tty 846 2332
Last edited by max.bra (2015-03-01 16:12:24)
Offline
That is interesting... there seems to be something else in the fedora config helping your nouveau idle. Also, it is clear that the nvidia drivers exacerbate the problem under either config. My machine uses the onboard GPU (the Intel 4600 HD). So I can't comment about the nvidia effect.
CPU-optimized Linux-ck packages @ Repo-ck • AUR packages • Zsh and other configs
Offline
sorry my bad. terrible copy paste.
last fedora was tty. corrected.
Offline
sorry my bad. terrible copy paste.
last fedora was tty. corrected.
...what about nouveau + fedora config?
CPU-optimized Linux-ck packages @ Repo-ck • AUR packages • Zsh and other configs
Offline
and yes, nvidia (proprietary or free) seems to be involved.
tty 1000hz and 19ms stock behaves like yours.
i'm looking for some about firmware settings or xdamage related.
using nvidia blob, i've never seen that powertop register nouveau as the first cpu wakener.
Offline
max.bra wrote:sorry my bad. terrible copy paste.
last fedora was tty. corrected....what about nouveau + fedora config?
do you think is needed?
Offline
@max.bra - Maybe not... just trying to understand it. For my system, the default 10 ms using the modified tick rate of 1000 sets it straight.
stats.sh mylog.txt
median: 931.41
count : 1052
Again, I think there's more going on with your system. Hopefully, the kernel devs will take this on based on the bugzilla.
CPU-optimized Linux-ck packages @ Repo-ck • AUR packages • Zsh and other configs
Offline
time to compile and log...
Offline
added 'fedora nouveau xorg'
nothing new...
Offline
@graysky, is it normal for this CPU to reach 93°C (gkrellm/lmsensors) while compiling the linux kernel? I've the stock cooler and the CPU is not overclocked o_O
Intel specifies 74°C for the Tcase, which is described as the temperature at the heat spreader, which is going to be different than the core temperature. I can't find a listing for the actual core temp, but I understand Haswell (and Refresh) desktop CPU's to throttle around 95-100°C. Running the max-heat torture test in Prime95 can get my 4790k up to low 90's on a 120mm AIO.
Either way, I'm not personally comfortable with temperatures that high, and with the computer itself drawing >200 watts from the wall, up from ~50 watts at idle, I think the CPU is blowing well past it's TDP rating when running in turbo mode.
For this reason I like to disable turbo when running some non-time-critical process, such as kernel compilation. It does assume you're running pstate, of course.
echo 1 > /sys/devices/system/cpu/intel_pstate/no_turbo
Last edited by RankoKohime (2015-03-23 01:09:16)
Offline
Ranko - consider lowing your vcore or upgrading your cooling solution particularly if your cpu is not overclocked.
CPU-optimized Linux-ck packages @ Repo-ck • AUR packages • Zsh and other configs
Offline
@RankoKohime thank you for getting back with your insights: yeah, i'm pretty sure it was something related to the very old thermal paste i stupidly used. Now that i switched to an ARCTIC Freezer 13 i rarely see even 75°C..
Offline
Ranko - consider lowing your vcore or upgrading your cooling solution particularly if your cpu is not overclocked.
Cooling upgrade is in the budget queue. The temperatures are a more manageable <=70°c when running anything other than Prime95, (even with turbo enabled) it's just the algorithms in Prime95 can melt Haswell chips. (And I believe Ivy chips as well?)
Offline
https://bbs.archlinux.org/viewtopic.php?id=173180
Seems this issue has been going on for long but there are different school of conclusion for it. For some its normal but for others its not.
Offline
CONFIG_FAST_NO_HZ=y in stock Ubuntu kernels also could be the reasons for lower temps in Ubuntu vs Arch apart from Hz=300
The latest 4.6.2.1 does improve over the older Arch kernel as now the CPU scales rather than get stuck at turbo speed but temps are still up over Ubuntu 16.04 4.4 kernel.
Offline
Just bumping this thread, with kernel 4.6 the cpu frequency on my Intel Haswell 4790 now scales regularly. However temps have gone down but are about 2 degrees more than Ubuntu 16.04 with kernel 4.4, whats others take on this.
Offline