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| Stress testing CPU (temperature vs freq) |
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Posted by: ashleymills - 03-26-2021, 09:35 AM - Forum: BSD on RockPro64
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I want to understand how the CPU temperature responds to frequency changes of the big.little architecture.
This depends on the environment and cooling system. In this case the rockpro64 was enclosed in the official NAS case (with two 3.5" HDD inside) and has the tall heatsink but no other cooling (case fan not operating).
What I want to establish is how much I need to throttle the CPU in order to maintain a reasonable temperature rise.
I was aiming to test the cartesian product of all possible frequencies, but the first few results contain enough information to move to the next experiment.
I varied the big freq and little freq and ran:
for each combination. Between each stress-test there was a break of 300 seconds. Unfortunately this wasn't enough to get the temperature to drop back to its resting value, so the mean temperature results were useless, but the temperature rise contains interesting information.
Here is the table:
![[Image: stress_test.png]](https://imghost.org/images/2021/03/26/stress_test.png)
A few things can be gleaned from this information: the big CPU has a much bigger impact on temperature rise than the small CPU (at the high end): reducing the little CPU by 216mhz reduced the temperature rise by 2.5C, a reduction of 0.0116C per mhz. Reducing the big CPU by 192mhz reduced the temperature rise by 7.4C, or 0.0378C per mhz. That's a factor of ~3 so that's pretty useful to know.
Obviously don't read too much into this, I'm not going to go overboard with designing these experiments, I'm just trying to get some rough information at the present time. I don't know what the steady-state temperatures are for these combos with my setup as I only stressed the CPU for 5 minutes.
If you burn all the CPUs with the stress tool on max freq, the temperature just keeps rising and rising with the passive cooling system I have setup. I let it get to about 85C before terminating that idea. If I'm reading the spec sheet for the RK3399 correctly, the maximum temperature the chip can tolerate is 125C but I guess we don't want to let it get to that point.
What I'd like to understand next is how hard can I push the system with passive cooling that results in a steady state temperature that isn't insane. This would be useful for designing a throttling strategy in the absence of ACPI driven throttling. Then I'll look at adding a fan.
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| pinephone 2 specs discussion - 5G WiFi6 BT5 NFC? - |
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Posted by: mitcoes - 03-26-2021, 03:37 AM - Forum: General Discussion on PinePhone
- Replies (17)
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Will we have a pinephone 2 specs discussion?
I would like a 5G + WiFi6 + NFC + BT5 model, even if the rest is the same as the 1
And if it has socket/s for RAM and ROM to add more RAM/ROM or change them to higher capacity or replace them if damaged or plug the ROM in other device if phone fails if some information was not backed up even better.
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| Why use x000 mAh instead of x Ah in battery specs? Why no use Coulombs, (SI)? |
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Posted by: mitcoes - 03-26-2021, 03:29 AM - Forum: General Discussion on PinePhone
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Why use x000 mAh instead of x Ah in battery specs? Why no use Coulombs, (SI)?
I understand it is what market does, but aren't we a "nerd" community.
Al least instead of writing 3000 mAh write 3 Ah for the Pine phone battery
And even better 3 Ah / 10800 C.
Even from a marketing point of view 10800 C is perceived as more than 3000 mAh or 3 Ah even it is the same.
And I would use kC as 10.8 kC for this case.
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| Kdenlive or other video editing software?? |
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Posted by: SuttonWillow - 03-26-2021, 03:16 AM - Forum: General Discussion on Pinebook Pro
- Replies (4)
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I'm tempted to get a PineBook Pro once the new batch goes up for sale and I'm curious, can the PineBook Pro do some light video editing? I'll be coming over from a ThinkPad X220 and on that machine I'd sometimes do some light editing, stuff like putting a few video clips together and maybe adding some light effects all while using proxy clips in Kdenlive. Is the Pinebook Pro capable of doing that? If not it's not a deal breaker I'm just curious essay writer
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| Difficulty making calls |
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Posted by: Zebulon Walton - 03-25-2021, 07:50 PM - Forum: Mobian on PinePhone
- Replies (10)
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Has anyone else noticed difficulty in making calls? It seems that making calls has become less reliable. (Not sure when this started happening because I'm still using the Pinephone for test purposes and don't call out with it frequently.)
What happens is that when using the dial pad, the phone just gives a brief click but the call screen with the red hangup button never comes up. Sometimes you can see it become visible for a fraction of a second before disappearing to be replaced with the keypad. Immediately repeating the call, sometimes there is brief audio from other end indicating a connection was made but the audio cuts out immediately.
Initiating calls from the contact list seems to work a little better, but it's still necessary to press the call button several times before the call screen and audio come up.
Mobian is up to the current patch level as of this writing.
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Next Pinephone should be smaller (imho) |
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Posted by: _kiwi - 03-25-2021, 06:01 PM - Forum: General Discussion on PinePhone
- Replies (7)
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My Pinephone fell on the floor and have a minor crack in the screen. Luckily both the digitizer and the display still work fine.
I never had that before with smaller phones (and each of my previous smartphones fell on hard floor at least few times).
Thing is, I always bought the smallest decent phone I could find, and that every generation is a bit bigger. I made an exception for the Pinephone because of the concept.
A smaller phone:
- fits in more pockets
- get less bending pressure in pockets
- is less lickely to crack because of less weight
- requires a smaller -> cheaper screen
- requires less power to light the screen, thus a smaller battery or can last longer
- takes less space on desks etc
Now I'm wondering, do people here actually like to have a so big device? Or is it in imitation of market trends?
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| Unsubscription Information: |
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Posted by: RodneyMyers - 03-25-2021, 04:57 PM - Forum: General
- Replies (1)
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I am getting subscription notices for the "Debian on PinePhone." forums.
I have tried clicking on the unsubscribe link, but I keep getting
Authorization code mismatch. Are you accessing this function correctly? Please go back and try again.
info, and in my "User CP", I am NOt subscibed to any forums.
What can be done?
Thanks
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| Mobian Constant Vibration |
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Posted by: tumblingdog - 03-25-2021, 04:45 PM - Forum: Mobian on PinePhone
- Replies (4)
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I know this has been addressed on other threads with different versions of Pine Pine but was wondering about a solution. I have read other threads where it stated about pinching wires but this phone is totally enclosed with no exposed wiring. I had placed a Straight Talk SIM in the phone but didn't seem compatible so I removed it. Not long after that, I started noticing the constant vibration. As it powers on, it will start vibrating even after updating the software, removing and reinstalling the battery, etc. On a side note, I did get the Red Pocket service to work very well using a GSMA SIM from the SIM kit on eBay.
Is the phone trying to give me a notification or is it a malfunction? Any suggestions on a remedy?
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