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JumboAg
Apprentice
Joined: 03 Mar 2007
Posts: 205
Location: Dallas, TX
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 Posted: Wed Oct 18, 2023 12:30 am Post subject: RPI4 performance issues with 6.1 kernel |
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Is anyone running Gentoo on a raspberry pi 4b (8G)? If so, hows performance for you? My new install isn't really even usable. Standalone terminal stuff is fine but I installed lxde and the firefox browser is extremely slow (cant compile chromium). Playing video stutters so bad its impossible to view.
I think I have everything installed correctly but am welcome to ideas on what to check. Its night and day comparing this to a stock raspbian install. That one runs very fast on the same RPI4.
| Code: | $ uname -a
Linux hamtoopi 6.1.54-v8+ #1 SMP PREEMPT Wed Oct 4 01:01:34 CDT 2023 aarch64 GNU/Linux
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| Code: | $ cat /boot/config.txt
# For more options and information see
# http://rpf.io/configtxt
# Some settings may impact device functionality. See link above for details
# uncomment if you get no picture on HDMI for a default "safe" mode
#hdmi_safe=1
# uncomment the following to adjust overscan. Use positive numbers if console
# goes off screen, and negative if there is too much border
#overscan_left=16
#overscan_right=16
#overscan_top=16
#overscan_bottom=16
# uncomment to force a console size. By default it will be display's size minus
# overscan.
#framebuffer_width=1280
#framebuffer_height=720
# uncomment if hdmi display is not detected and composite is being output
#hdmi_force_hotplug=1
# uncomment to force a specific HDMI mode (this will force VGA)
#hdmi_group=1
#hdmi_mode=1
# uncomment to force a HDMI mode rather than DVI. This can make audio work in
# DMT (computer monitor) modes
#hdmi_drive=2
# uncomment to increase signal to HDMI, if you have interference, blanking, or
# no display
#config_hdmi_boost=4
# uncomment for composite PAL
#sdtv_mode=2
#uncomment to overclock the arm. 700 MHz is the default.
#arm_freq=800
# Uncomment some or all of these to enable the optional hardware interfaces
#dtparam=i2c_arm=on
#dtparam=i2s=on
#dtparam=spi=on
# Uncomment this to enable infrared communication.
#dtoverlay=gpio-ir,gpio_pin=17
#dtoverlay=gpio-ir-tx,gpio_pin=18
# Additional overlays and parameters are documented /boot/overlays/README
# Enable audio (loads snd_bcm2835)
dtparam=audio=on
# Automatically load overlays for detected cameras
camera_auto_detect=1
# Automatically load overlays for detected DSI displays
display_auto_detect=1
# Enable DRM VC4 V3D driver
dtoverlay=vc4-kms-v3d
max_framebuffers=2
# Run in 64-bit mode
arm_64bit=1
# Disable compensation for displays with overscan
disable_overscan=1
[cm4]
# Enable host mode on the 2711 built-in XHCI USB controller.
# This line should be removed if the legacy DWC2 controller is required
# (e.g. for USB device mode) or if USB support is not required.
otg_mode=1
[all]
[pi4]
# Run as fast as firmware / board allows
arm_boost=1
[all]
gpu_mem=256
over_voltage=6
arm_freq=2000
gpu_freq=750
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| Code: | $ glxinfo -B
name of display: :0
display: :0 screen: 0
direct rendering: Yes
Extended renderer info (GLX_MESA_query_renderer):
Vendor: Broadcom (0x14e4)
Device: V3D 4.2 (0xffffffff)
Version: 23.1.8
Accelerated: yes
Video memory: 7635MB
Unified memory: yes
Preferred profile: compat (0x2)
Max core profile version: 0.0
Max compat profile version: 2.1
Max GLES1 profile version: 1.1
Max GLES[23] profile version: 3.1
OpenGL vendor string: Broadcom
OpenGL renderer string: V3D 4.2
OpenGL version string: 2.1 Mesa 23.1.8
OpenGL shading language version string: 1.20
OpenGL ES profile version string: OpenGL ES 3.1 Mesa 23.1.8
OpenGL ES profile shading language version string: OpenGL ES GLSL ES 3.10
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alamahant
Advocate
Joined: 23 Mar 2019
Posts: 3916
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| Posted: Wed Oct 18, 2023 2:31 pm Post subject: |
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You can not expect it to be like a laptop but in my case it is fairly ok.
I use same rpi4 like yours.
Some config of mine
| Code: |
VIDEO_CARDS="vc4 v3d"
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| Code: |
USE="............ egl gles1 gles2 opengl"
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| Code: |
arm_64bit=1
kernel=kernel8.img
initramfs initramfs-6.1.38-v8+.img
disable_overscan=1
gpu_mem=128
dtparam=audio=on
enable_uart=0
dtoverlay=disable-wifi
dtoverlay=disable-bt
disable_splash=1
[pi4]
dtoverlay=vc4-fkms-v3d
max_framebuffers=2
[all]
over_voltage=6
arm_freq=2000
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As for kernel I always use
https://github.com/raspberrypi/firmware
for my kernels.
Also I only keep my /boot parition on the SD card.
All other partitions I rsynced to a mini SSD drive and I use that instead of the SD card.
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NeddySeagoon
Administrator
Joined: 05 Jul 2003
Posts: 54577
Location: 56N 3W
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| Posted: Wed Oct 18, 2023 4:24 pm Post subject: |
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JumboAg,
Check the CPU governor in use.
| Code: | | Default CPUFreq governor (powersave) ---> |
is a bad choice.
There are some /proc or /sys entries to read and write to change it on the fly, as long as the governor you want is already built.
_________________
Regards,
NeddySeagoon
Computer users fall into two groups:-
those that do backups
those that have never had a hard drive fail. |
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gentoo_ram
Guru
Joined: 25 Oct 2007
Posts: 501
Location: San Diego, California USA
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| Posted: Wed Oct 18, 2023 10:43 pm Post subject: |
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I agree that the default CPU governor is "powersave" which makes the device run at 600MHz all the time. It took me a while to figure that out. I wondered why my Pi4B felt so slow!
I added a /etc/local.d/cpugovern.start:
| Code: | #!/bin/bash
echo 'ondemand' > /sys/devices/system/cpu/cpu0/cpufreq/scaling_governor
echo 'ondemand' > /sys/devices/system/cpu/cpu1/cpufreq/scaling_governor
echo 'ondemand' > /sys/devices/system/cpu/cpu2/cpufreq/scaling_governor
echo 'ondemand' > /sys/devices/system/cpu/cpu3/cpufreq/scaling_governor
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After that, it was much better. I wrote a script to report how much time is spent at all the different frequencies. It's a little verbose, but works for me:
| Code: | #!/usr/bin/perl -w
# Read which processors are available
open L, "/sys/devices/system/cpu/online" or die "can't open online CPU list";
$l = <L>;
close L;
if ($l =~ /(\d+)-(\d+)/)
{
$min_cpu = $1;
$max_cpu = $2;
}
else
{
die "can't parse CPU list";
}
# read the data for the first processor
open C, "/sys/devices/system/cpu/cpu${min_cpu}/cpufreq/scaling_cur_freq" or die "Can't open CPU frequency stats";
@c = <C>;
close C;
chomp @c;
$curr_freq_list[0] = $c[0];
open F, "/sys/devices/system/cpu/cpu${min_cpu}/cpufreq/stats/time_in_state" or die "can't open stats file";
@f = <F>;
close F;
chomp @f;
# Set up the per-processor clocking stats
$f{0} = [ ];
foreach $_ (@f)
{
@s = split / /;
$f{$s[0]} = [ $s[1] ];
$f{0}[0] += $s[1];
}
# Go through the rest of the processors and collect the stats
for ($cpu = $min_cpu+1; $cpu <= $max_cpu; $cpu++)
{
open C, "/sys/devices/system/cpu/cpu${cpu}/cpufreq/scaling_cur_freq" or die "can't open curr file";
@c = <C>;
close C;
chomp @c;
push @curr_freq_list, $c[0];
open F, "/sys/devices/system/cpu/cpu${cpu}/cpufreq/stats/time_in_state" or die "can't open stats file";
@f = <F>;
close F;
chomp @f;
foreach $_ (@f)
{
@s = split / /;
$ff=int $s[0];
$tt=int $s[1];
push @{$f{$ff}}, $tt;
$f{0}[$cpu] += $tt;
}
}
# Print the output...
print "CPU:\t";
for ($cpu = $min_cpu; $cpu <= $max_cpu; $cpu++)
{
printf "%5d\t", $cpu;
}
print "\n";
print "Curr:\t";
for ($cpu = $min_cpu; $cpu <= $max_cpu; $cpu++)
{
printf "%6.2f\t", $curr_freq_list[$cpu]/1000000;
}
print "\n";
foreach $_ (sort {$a <=> $b} keys %f)
{
next if ($_ == 0);
printf ("%4.2f\t", $_/1000000);
for ($cpu = $min_cpu; $cpu <= $max_cpu; $cpu++)
{
printf "%6.2f%%\t",
$f{$_}[$cpu] / $f{0}[$cpu] * 100.0;
# printf "%10d (%5.1f%%)\t",
# $f{$_}[$cpu],
# $f{$_}[$cpu] / $f{0}[$cpu] * 100.0;
}
print "\n";
} |
Output: | Code: | CPU: 0 1 2 3
Curr: 1.60 1.60 1.60 1.60
0.60 92.64% 92.64% 92.64% 92.64%
0.70 5.33% 5.33% 5.33% 5.33%
0.80 0.75% 0.75% 0.75% 0.75%
0.90 0.16% 0.16% 0.16% 0.16%
1.00 0.08% 0.08% 0.08% 0.08%
1.10 0.08% 0.08% 0.08% 0.08%
1.20 0.09% 0.09% 0.09% 0.09%
1.30 0.06% 0.06% 0.06% 0.06%
1.40 0.04% 0.04% 0.04% 0.04%
1.50 0.05% 0.05% 0.05% 0.05%
1.60 0.03% 0.03% 0.03% 0.03%
1.70 0.02% 0.02% 0.02% 0.02%
1.80 0.67% 0.67% 0.67% 0.67%
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Gentoo on ARM
