Slow compilation time on meteor lake laptop

nxe9 · Tux's lil' helper Joined: 05 Jun 2021 Posts: 128

Hi, compilation on my laptop seems to take too long for me. firefox needs about 60 minutes to build on my Ultra 155H. I can reproduce it. On my old desktop i7-4790k it takes about 50 minutes. All 22 threads are used at 100 % according to htop. What I notice is that on the laptop htop shows cpu usage in blue (low priority). I think that's the problem. I haven't configured any power management so far. I have no idea how the kernel manages this and why it decides for restrictions on a laptop. The laptop is constantly connected to the power supply. Or maybe it has something to do with the temperature of the laptop? However, I do not believe that a laptop with a powerful new processor is worse than 10-year-old cpu.

Should I make the settings using app-laptop/laptop-mode-tools or what is the best option?

Kernel: 6.11.10-gentoo-dist (sys-kernel/gentoo-kernel)
System is up to date
GUI: X11 / wm awesome with eloging starting in boot

Edit:

nxe9 · Tux's lil' helper Joined: 05 Jun 2021 Posts: 128

Same result with sys-power/thermald. I gues I'll just have to try laptop-mode-tools.

pietinger · Posted: Sat Nov 23, 2024 7:42 pm Post subject:

How much RAM has your old i7 and your new notebook?
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nxe9 · Tux's lil' helper Joined: 05 Jun 2021 Posts: 128

Old i7 desktop: 32 GB
New Ultra 7 notebook: 96 GB

pietinger · Posted: Sat Nov 23, 2024 9:32 pm Post subject:

nxe9 · Tux's lil' helper Joined: 05 Jun 2021 Posts: 128

So far I have installed themald and laptop_mode. Both are added with rc-update. Laptop_mode has default configuration. Still the same, firefox needs the same amount of time.

I ran the 7z benchmark on Windows and Gentoo and on windows the results are much better.The average MIPS for compressing / decompressing are about 70000 on windows whereas about 42500/25000 (compressing / decompressing) on gentoo. What I noticed is that in the case of 7z htop shows the cpu in green instead of blue.

I don't know what to do next. It looks like the laptop with is not working at full capacity.

/etc/laptop-mode/laptop-mode.conf contains the default value

pietinger · Posted: Sun Nov 24, 2024 11:37 am Post subject:

I would like to have a look at the output of “dmesg” (complete) from your notebook; and of “dmesg | grep Bogo” from your i7.
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nxe9 · Tux's lil' helper Joined: 05 Jun 2021 Posts: 128

desktop i7:

pietinger · Posted: Sun Nov 24, 2024 3:50 pm Post subject:

nxe9 · Tux's lil' helper Joined: 05 Jun 2021 Posts: 128

After purchasing, I immediately updated the bios via Windows. I currently have the latest bios version.

I don't really believe that the fault is in the BIOS, because why there are much better 7z benchmark results on Windows?

There is 2x48 GB RAM.

What really surprises me is the fact that on the desktop all kernels are green in htop. On the notebook, however, they are all blue. It looks like the kernel doesn't want to run these threads with full priority. However, I don't know why.

Next steps I will take:
1. makeopts -j20
2. Review the bios settings
2. Try 7z benchmark on arch live usb.
3. Try 7z benchmark on ubuntu live usb.

I will tell you about the result

Edit:
4. I can also try to run arch live usb, chroot into gentoo and build firefox again. In this case, the compilation will be with the Arch kernel, so it is also interesting what the result will be.

pietinger · Posted: Sun Nov 24, 2024 4:15 pm Post subject:

Yes, a comparison with another distribution can help to shed light on the situation.
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keekkenen · n00b Joined: 05 Oct 2024 Posts: 9

I think we can't to use BogoMIPS for any comparing. It's non sense.
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pietinger · Posted: Sun Nov 24, 2024 5:49 pm Post subject:

Yes, I know what BogoMIPS is and what it is not ... https://en.wikipedia.org/wiki/BogoMips ;-)

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nxe9 · Tux's lil' helper Joined: 05 Jun 2021 Posts: 128

I will now report on the current status.

1. MAKEOPTS="-j20"
Comparable time, same temperatures, low cpu status in htop. It didn't solve the problem.

2. 7zip benchmark on arch linux live usb (6.10.10)
Similar results to gentoo, much worse than on windows.

3. firefox compilation on arch live usb after chroot to gentoo.
Similiar result to native gentoo, comparable time, same temperatures, low cpu status in htop. It didn't solve the problem.

What's next?

- I will check 7z benchmark on ubuntu live cd.

- Change UEFI settings.

Perhaps you can advise me on UEFI settings? I am posting a simulator of my UEFI where all options are shown. You don't need to download anything. It works from your browser.

pietinger · Posted: Mon Nov 25, 2024 12:46 am Post subject:

nxe9 · Tux's lil' helper Joined: 05 Jun 2021 Posts: 128

I changed following UEFI settings:
- Intel SpeedStop Technology -> Off
- Scheme for Battery Balanced -> Maximal Performance (I am working on AC however, I changed the setting just in case)
- Energy Efficient Turbo -> Off
- CPU Power Managment -> Off
- Cool & Quiet on Lap -> Off

Same result. Now I will run some cpu benchmarks on ubuntu and windows and compare temperatures etc. So far, I haven't seen a temperature higher than 62 C on the cpu cores with gentoo. I wonder if it will be different on Windows.

If anyone has a new Thinkpad, I'd love to know what it looks like for you.

pingtoo · Posted: Mon Nov 25, 2024 2:45 pm Post subject:

Just want to bring to attention. Does both machine have same scheduler?

On my ARM nodes I have several have scheduler fixed using "powersave" which exhibiting the behaviour you described. temperature never rose to above some 60C.

nxe9 · Tux's lil' helper Joined: 05 Jun 2021 Posts: 128

@pingtoo:

pingtoo · Posted: Mon Nov 25, 2024 7:12 pm Post subject:

nxe9 · Tux's lil' helper Joined: 05 Jun 2021 Posts: 128

I have some new information.

First of all from what I see CPU usage is green in htop for some packages like nodejs or chromium. Maybe it depends on the compiler or something else. I guess it doesn't matter too much.

I tried cpu sysbench on ubuntu and gentoo. similar results and similar temperatures on both systems.

I did some stress tests on Windows and there is also no very high temperature there. Generally, there are single peaks above 70 C, but as a rule the temperature during load is somewhere around 60. Such peaks also appeared on Ubuntu and Gentoo.

So it looks as if, on the one hand, everything is fine and consistent. However, I'm disappointed, an example:
nodejs merge time:
12 years old i7 3612QM notebook cpu: ~1 h 45 min
new Ultra 7 155H: ~1 h 25 min

I know that I didn't buy a gaming notebook, but a budget and business one, but I'm negatively surprised that the difference is so small.

My new notebook has a 65 watt charger. Ultra 7 155H has 28 Watt TDP (Base), 64 Watt and. 115 Watt (PL2) max. Turbo Power mode. Perhaps Lenovo has limited its capabilities in terms of hardware and I have a powerful processor, but the laptop only works with part of the power?

Hardware unrelated benchmarks on the Internet show that Ultra 7 155H is more powerful than i7 4790k and my real example shows me a completely different view. Unfortunately, I do not have any representative and real data to compare my observations.

pietinger · Posted: Tue Nov 26, 2024 10:43 pm Post subject:

nxe9 · Tux's lil' helper Joined: 05 Jun 2021 Posts: 128

genlop is very helpful to track emerge time.

i9-13900K is a completely different level. It's a powerful desktop processor that outclasses laptop cpu.

pietinger · Posted: Wed Nov 27, 2024 12:19 am Post subject:

nxe9 · Tux's lil' helper Joined: 05 Jun 2021 Posts: 128

Pietinger, thanks, I see now what you mean.

I tried MAKEOPTS="-j8" on my new notebook and there is practically no difference between 22 and 8 during firefox and nodejs compilation. Very strange...

My cpu contains 12 performance threads, 8 efficient threads and 2 low power threds. So I would expect at least a noticeable deterioration on 8 threads. Perhaps the compilers are not yet optimized for my hardware? however, I can clearly see the differences in htop. At -j8 I see that fewer threads are actually loaded. At -j22 I see the full load.