NetBSD Problem Report #60180
From john@beaver.zia.io Tue Apr 7 01:49:20 2026
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for <gnats-bugs@gnats.NetBSD.org>; Tue, 7 Apr 2026 01:49:19 +0000 (UTC)
Message-Id: <20260407014215.8559DB86E92@beaver.zia.io>
Date: Tue, 07 Apr 2026 01:42:15 +0000 (UTC)
From: john@klos.com
Reply-To: john@klos.com
To: gnats-bugs@NetBSD.org
Subject: radeon* is problematically slow
X-Send-Pr-Version: 3.95
X-From4GNATS: "john@klos.com via gnats" <gnats-admin@NetBSD.org>
>Number: 60180
>Category: kern
>Synopsis: radeon* is problematically slow
>Confidential: no
>Severity: serious
>Priority: high
>Responsible: kern-bug-people
>State: open
>Class: sw-bug
>Submitter-Id: net
>Arrival-Date: Tue Apr 07 01:50:00 +0000 2026
>Last-Modified: Fri Apr 10 07:15:01 +0000 2026
>Originator: John Klos
>Release: NetBSD 11.0_RC3
>Organization:
>Environment:
System: NetBSD beaver.zia.io 11.0_RC3 NetBSD 11.0_RC3 (GENERIC) #0: Mon Apr 6 23:59:22 UTC 2026 john@beaver.zia.io:/usr/obj-amd64/sys/arch/amd64/compile/GENERIC amd64
Architecture: x86_64
Machine: amd64
>Description:
On a system with Radeon graphics built in to the CPU, framebuffer operations
significantly slow the whole system. cat'ing a 250 meg text file:
time cat amd64_24-march-2026.log > /dev/null
0.06 real 0.00 user 0.06 sys
The same over ssh to a local (fast) machine:
time cat amd64_24-march-2026.log
24.31 real 0.04 user 2.87 sys
Running it on radeondrmkmsfb0 console:
time cat amd64_24-march-2026.log
315.82 real 0.04 user 173.28 sys
While the cat is running on the Radeon console, the whole system becomes significantly
slower:
load averages: 1.08, 0.37, 0.25; up 0+00:36:52 22:56:28
28 processes: 23 sleeping, 5 on CPU
CPU states: 0.0% user, 0.0% nice, 44.8% system, 31.9% interrupt, 23.1% idle
Memory: 330M Act, 24M Wired, 17M Exec, 292M File, 30G Free
Swap: 64G Total, 64G Free / Pools: 43M Used / Network: 1K In, 4K Out
PID USERNAME PRI NICE SIZE RES STATE TIME WCPU CPU COMMAND
426 root 28 0 11M 1564K CPU/0 0:26 102% 72.66% cat
2679 root 28 0 13M 2892K CPU/1 0:18 49.07% 49.07% sysstat
2175 john 28 0 29M 11M CPU/2 0:28 45.56% 45.56% sshd-session
0 root 223 0 0K 328M CPU/1 1:30 16.94% 16.94% [system]
1878 john 85 0 24M 6356K poll/2 0:03 6.15% 6.15% sshd-session
1958 john 40 0 13M 2452K CPU/3 0:02 2.83% 2.83% top
1455 root 85 0 20M 19M pause/3 0:00 0.10% 0.10% ntpd
2289 root 85 0 12M 2340K wait/3 0:02 0.00% 0.00% sh
2361 john 85 0 12M 2340K wait/2 0:02 0.00% 0.00% sh
2356 root 82 0 24M 8984K poll/1 0:02 0.00% 0.00% sshd-session
2036 root 85 0 24M 8932K poll/0 0:00 0.00% 0.00% sshd-session
2227 root 85 0 21M 6944K wait/1 0:00 0.00% 0.00% login
2084 postfix 85 0 23M 5476K kqueue/1 0:00 0.00% 0.00% qmgr
2005 postfix 85 0 23M 5412K kqueue/2 0:00 0.00% 0.00% pickup
1570 root 85 0 19M 4696K poll/0 0:00 0.00% 0.00% sshd
1853 root 85 0 23M 2888K kqueue/1 0:00 0.00% 0.00% master
677 root 85 0 20M 2564K kqueue/3 0:00 0.00% 0.00% syslogd
1243 root 85 0 12M 2356K wait/0 0:00 0.00% 0.00% sh
1845 john 85 0 12M 2340K wait/0 0:00 0.00% 0.00% sh
552 _dhcpcd 85 0 13M 2100K poll/1 0:00 0.00% 0.00% dhcpcd
1 root 85 0 12M 1808K wait/0 0:00 0.00% 0.00% init
2221 root 85 0 12M 1752K nanosl/2 0:00 0.00% 0.00% cron
551 root 85 0 14M 1728K poll/1 0:00 0.00% 0.00% dhcpcd
555 _dhcpcd 85 0 12M 1580K poll/2 0:00 0.00% 0.00% dhcpcd
2232 root 85 0 11M 1580K wait/1 0:00 0.00% 0.00% time
systat vmstat takes multiple seconds to update itself:
3 users Load 1.62 0.54 0.31 Mon Apr 6 22:56:49
Proc:r d s Csw Traps SysCal Intr Soft Fault PAGING SWAPPING
1 7 31 145 7 43 in out in out
ops
47.8% Sy 0.0% Us 0.0% Ni 38.5% In 24.2% Id pages
| | | | | | | | | | |
===================%%%%%%%%%%%%%%%%%%% forks
fkppw
Anon 45356 % zero 106 Interrupts fksvm
Exec 17788 % wired 24072 TLB shootdown pwait
File 299244 % inact 100 cpu0 timer relck
Meta 9757 % bufs 722 ioapic0 pin 4 rlkok
(kB) real swaponly free msi0 vec 0 noram
Active 338316 31351580 4 msix1 vec 0 ndcpy
Namei Sys-cache Proc-cache 2 msi3 vec 0 fltcp
Calls hits % hits % ioapic0 pin 18 zfod
6 6 100 ioapic0 pin 17 cow
msi4 vec 0 1024 fmin
Disks: seeks xfers bytes %busy 1365 ftarg
wd0 7 143238 19.0 itarg
dk0 flnan
dk1 6 125333 30.2 pdfre
dk2 pdscn
wd1 7 143238 19.0
dk3
dk4 6 125333 30.2
dk5
raid0 6 122775 43.9
dk6 6 122775 57.1
>How-To-Repeat:
Print a lot of stuff to the Radeon framebuffer console.
>Fix:
One option is to disable radeon*, which gives much better performance and
doesn't slow the whole system when printing to the console.
>Audit-Trail:
From: John Klos <john@klos.com>
To: gnats-bugs@netbsd.org
Cc:
Subject: Re: kern/60180: radeon* is problematically slow
Date: Tue, 7 Apr 2026 02:00:47 +0000 (UTC)
dmesg:
Copyright (c) 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003,
2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013,
2014, 2015, 2016, 2017, 2018, 2019, 2020, 2021, 2022, 2023,
2024, 2025, 2026
The NetBSD Foundation, Inc. All rights reserved.
Copyright (c) 1982, 1986, 1989, 1991, 1993
The Regents of the University of California. All rights reserved.
NetBSD 11.0_RC3 (GENERIC) #0: Mon Apr 6 23:59:22 UTC 2026
john@beaver.zia.io:/usr/obj-amd64/sys/arch/amd64/compile/GENERIC
total memory = 32201 MB
avail memory = 31122 MB
timecounter: Timecounters tick every 10.000 msec
Kernelized RAIDframe activated
timecounter: Timecounter "i8254" frequency 1193182 Hz quality 100
efi: systbl at pa 9e35ef18
mainbus0 (root)
ACPI: RSDP 0x000000009D5F5000 000024 (v02 ALASKA)
ACPI: XSDT 0x000000009D5F5078 00006C (v01 ALASKA A M I 01072009 AMI 00010013)
ACPI: FACP 0x000000009D5FA1A0 00010C (v05 ALASKA A M I 01072009 AMI 00010013)
Firmware Warning (ACPI): Optional FADT field Pm2ControlBlock has valid Length but zero Address: 0x0000000000000000/0x1 (20241212/tbfadt-796)
ACPI: DSDT 0x000000009D5F5178 005022 (v02 ALASKA A M I 00000000 INTL 20051117)
ACPI: FACS 0x000000009D625D80 000040
ACPI: APIC 0x000000009D5FA2B0 00007E (v03 ALASKA A M I 01072009 AMI 00010013)
ACPI: FPDT 0x000000009D5FA330 000044 (v01 ALASKA A M I 01072009 AMI 00010013)
ACPI: MCFG 0x000000009D5FA378 00003C (v01 ALASKA A M I 01072009 MSFT 00010013)
ACPI: HPET 0x000000009D5FA3B8 000038 (v01 ALASKA A M I 01072009 AMI 00000005)
ACPI: SSDT 0x000000009D5FA3F0 000E58 (v01 AMD AGESA 00000001 AMD 00000001)
ACPI: SSDT 0x000000009D5FB248 0046B7 (v02 AMD AGESA 00000002 MSFT 04000000)
ACPI: CRAT 0x000000009D5FF900 0003F8 (v01 AMD AGESA 00000001 AMD 00000001)
ACPI: SSDT 0x000000009D5FFCF8 001204 (v01 AMD CPMCMN 00000001 INTL 20051117)
ACPI: 4 ACPI AML tables successfully acquired and loaded
ioapic0 at mainbus0 apid 5: pa 0xfec00000, version 0x21, 24 pins
ioapic1 at mainbus0 apid 6: pa 0xfec01000, version 0x21, 32 pins
cpu0 at mainbus0 apid 0
cpu0: Use mfence to serialize rdtsc
cpu0: AMD Athlon(tm) 5350 APU with Radeon(tm) R3 , id 0x700f01
cpu0: node 0, package 0, core 0, smt 0
cpu0: searching errata for cpu revision 0x00700f01
cpu1 at mainbus0 apid 1
cpu1: AMD Athlon(tm) 5350 APU with Radeon(tm) R3 , id 0x700f01
cpu1: node 0, package 0, core 1, smt 0
cpu2 at mainbus0 apid 2
cpu2: AMD Athlon(tm) 5350 APU with Radeon(tm) R3 , id 0x700f01
cpu2: node 0, package 0, core 2, smt 0
cpu3 at mainbus0 apid 3
cpu3: AMD Athlon(tm) 5350 APU with Radeon(tm) R3 , id 0x700f01
cpu3: node 0, package 0, core 3, smt 0
acpi0 at mainbus0: Intel ACPICA 20241212
acpi0: X/RSDT: OemId <ALASKA, A M I,01072009>, AslId <AMI ,00010013>
acpi0: MCFG: segment 0, bus 0-255, address 0x00000000e0000000
acpi0: SCI interrupting at int 9
acpi0: fixed power button present
timecounter: Timecounter "ACPI-Fast" frequency 3579545 Hz quality 1000
hpet0 at acpi0: high precision event timer (mem 0xfed00000-0xfed00400)
timecounter: Timecounter "hpet0" frequency 14318180 Hz quality 2000
AMDN (PNP0C01) at acpi0 not configured
com0 at acpi0 (UAR1, PNP0501-1): io 0x3f8-0x3ff irq 4
com0: ns16550a, 16-byte FIFO
attimer1 at acpi0 (TMR, PNP0100): io 0x40-0x43 irq 0
pcppi1 at acpi0 (SPKR, PNP0800): io 0x61
spkr0 at pcppi1: PC Speaker
wsbell at spkr0 not configured
midi0 at pcppi1: PC speaker
sysbeep0 at pcppi1
acpibut0 at acpi0 (PWRB, PNP0C0C-170): ACPI Power Button
RMEM (PNP0C01) at acpi0 not configured
acpiwmi0 at acpi0 (WMIO, PNP0C14-0): ACPI WMI Interface
acpiwmibus at acpiwmi0 not configured
attimer1: attached to pcppi1
pci0 at mainbus0 bus 0: configuration mode 1
pci0: i/o space, memory space enabled, rd/line, rd/mult, wr/inv ok
pchb0 at pci0 dev 0 function 0: AMD Family16h Root Complex (rev. 0x00)
radeon0 at pci0 dev 1 function 0: ATI Technologies Radeon HD 8400 / R3 Series (rev. 0x00)
hdaudio0 at pci0 dev 1 function 1: HD Audio Controller
hdaudio0: interrupting at msi0 vec 0
hdaudio0: HDA ver. 1.0, OSS 2, ISS 0, BSS 0, SDO 2, 64-bit
hdafg0 at hdaudio0: ATI R6xx HDMI
hdafg0: HDMI00 2ch: Digital Out [Jack]
hdafg0: 2ch/0ch 32000Hz 44100Hz 48000Hz PCM16 AC3
audio0 at hdafg0: playback
audio0: slinear_le:16 2ch 48000Hz, blk 1920 bytes (10ms) for playback
spkr1 at audio0: PC Speaker (synthesized)
wsbell at spkr1 not configured
pchb1 at pci0 dev 2 function 0: AMD Family16h Host Bridge (rev. 0x00)
ppb0 at pci0 dev 2 function 1: AMD Family16h GPP Bridge (rev. 0x00)
ppb0: PCI Express capability version 2 <Root Port of PCI-E Root Complex> x4 @ 5.0GT/s
ppb0: link is x1 @ 2.5GT/s
pci1 at ppb0 bus 1
pci1: i/o space, memory space enabled, rd/line, wr/inv ok
re0 at pci1 dev 0 function 0: RealTek 8168/8111 PCIe Gigabit Ethernet (rev. 0x07)
re0: interrupting at msix1 vec 0
re0: RTL8168E/8111E-VL (0x2c80)
re0: Ethernet address b4:4b:d6:21:30:0c
re0: using 256 tx descriptors
rgephy0 at re0 phy 7: RTL8211E 1000BASE-T media interface
rgephy0: 10baseT, 10baseT-FDX, 100baseTX, 100baseTX-FDX, 1000baseT, 1000baseT-FDX, auto
ppb1 at pci0 dev 2 function 4: AMD Family16h GPP Bridge (rev. 0x00)
ppb1: PCI Express capability version 2 <Root Port of PCI-E Root Complex> x1 @ 5.0GT/s
ppb1: link is x1 @ 2.5GT/s
pci2 at ppb1 bus 2
pci2: i/o space, memory space enabled, rd/line, wr/inv ok
re1 at pci2 dev 0 function 0: RealTek 8168/8111 PCIe Gigabit Ethernet (rev. 0x0c)
re1: interrupting at msix2 vec 0
re1: RTL8168G/8111G (0x4c00)
re1: Ethernet address 4c:cc:6a:08:eb:ce
re1: using 256 tx descriptors
rgephy1 at re1 phy 7: RTL8251 1000BASE-T media interface, rev. 0
rgephy1: 10baseT, 10baseT-FDX, 100baseTX, 100baseTX-FDX, 1000baseT-FDX, auto
xhci0 at pci0 dev 16 function 0: AMD FCH USB xHCI Controller (rev. 0x01)
xhci0: 64-bit DMA
xhci0: interrupting at msix3 vec 0
xhci0: xHCI version 1.0
usb0 at xhci0: USB revision 3.0
usb1 at xhci0: USB revision 2.0
ahcisata0 at pci0 dev 17 function 0: AMD Hudson SATA (AHCI) Controller (rev. 0x40)
ahcisata0: 64-bit DMA
ahcisata0: ignoring broken port multiplier support
ahcisata0: AHCI revision 1.30, 2 ports, 32 slots, CAP 0xf3309f01<PMD,ISS=0x3=Gen3,SCLO,SAL,SMPS,SSNTF,SNCQ,S64A>
ahcisata0: interrupting at msi4 vec 0
atabus0 at ahcisata0 channel 0
atabus1 at ahcisata0 channel 1
ohci0 at pci0 dev 18 function 0: AMD Hudson USB OHCI Controller (rev. 0x39)
ohci0: interrupting at ioapic0 pin 18
ohci0: OHCI version 1.0, legacy support
usb2 at ohci0: USB revision 1.0
ehci0 at pci0 dev 18 function 2: AMD Hudson USB EHCI Controller (rev. 0x39)
ehci0: 32-bit DMA
ehci0: interrupting at ioapic0 pin 17
ehci0: EHCI version 1.0
ehci0: 1 companion controller, 4 ports: ohci0
ehci0: Using DMA subregion for control data structures
usb3 at ehci0: USB revision 2.0
ohci1 at pci0 dev 19 function 0: AMD Hudson USB OHCI Controller (rev. 0x39)
ohci1: interrupting at ioapic0 pin 18
ohci1: OHCI version 1.0, legacy support
usb4 at ohci1: USB revision 1.0
ehci1 at pci0 dev 19 function 2: AMD Hudson USB EHCI Controller (rev. 0x39)
ehci1: 32-bit DMA
ehci1: interrupting at ioapic0 pin 17
ehci1: EHCI version 1.0
ehci1: 1 companion controller, 4 ports: ohci1
ehci1: Using DMA subregion for control data structures
usb5 at ehci1: USB revision 2.0
piixpm0 at pci0 dev 20 function 0: AMD Hudson SMBus Controller (rev. 0x3a)
piixpm0: SMBus initialization failed
hdaudio1 at pci0 dev 20 function 2: HD Audio Controller
hdaudio1: interrupting at ioapic0 pin 16
hdaudio1: HDA ver. 1.0, OSS 4, ISS 4, BSS 0, SDO 1, 64-bit
hdafg1 at hdaudio1: Realtek ALC887
hdafg1: DAC00 2ch: Speaker [Jack]
hdafg1: DAC01 2ch: HP Out [Jack]
hdafg1: ADC02 2ch: Line In [Jack], Mic In [Jack]
hdafg1: ADC03 2ch: Mic In [Jack]
hdafg1: 2ch/2ch 32000Hz 44100Hz 48000Hz 88200Hz 96000Hz 192000Hz PCM16 PCM20 PCM24 AC3
audio1 at hdafg1: playback, capture, full duplex, independent
audio1: slinear_le:16 2ch 48000Hz, blk 1920 bytes (10ms) for playback
audio1: slinear_le:16 2ch 48000Hz, blk 1920 bytes (10ms) for recording
spkr2 at audio1: PC Speaker (synthesized)
wsbell at spkr2 not configured
pcib0 at pci0 dev 20 function 3: AMD Hudson LPC Bridge (rev. 0x11)
pchb2 at pci0 dev 24 function 0: AMD Family16h HyperTransport Configuration (rev. 0x00)
pchb3 at pci0 dev 24 function 1: AMD Family16h Address Map Configuration (rev. 0x00)
pchb4 at pci0 dev 24 function 2: AMD Family16h DRAM Configuration (rev. 0x00)
amdnb_misc0 at pci0 dev 24 function 3: AMD NB Misc Configuration
amdtemp0 at amdnb_misc0: AMD CPU Temperature Sensors (Family16h)
pchb5 at pci0 dev 24 function 4: AMD Family16h CPU C-state Configuration (rev. 0x00)
pchb6 at pci0 dev 24 function 5: AMD Family16h Miscellaneous Configuration (rev. 0x00)
isa0 at pcib0
pckbc0 at isa0 port 0x60-0x64
acpicpu0 at cpu0: ACPI CPU
acpicpu0: C1: HLT, lat 0 us, pow 0 mW
acpicpu0: C2: I/O, lat 400 us, pow 0 mW
acpicpu0: P0: FFH, lat 4 us, pow 5070 mW, 2050 MHz
acpicpu0: P1: FFH, lat 4 us, pow 4635 mW, 1850 MHz
acpicpu0: P2: FFH, lat 4 us, pow 3712 mW, 1650 MHz
acpicpu0: P3: FFH, lat 4 us, pow 2968 mW, 1400 MHz
acpicpu0: P4: FFH, lat 4 us, pow 2291 mW, 1200 MHz
acpicpu0: P5: FFH, lat 4 us, pow 1902 mW, 1000 MHz
acpicpu0: P6: FFH, lat 4 us, pow 1545 mW, 800 MHz
acpicpu0: T0: I/O, lat 1 us, pow 0 mW, 100 %
acpicpu0: T1: I/O, lat 1 us, pow 0 mW, 88 %
acpicpu0: T2: I/O, lat 1 us, pow 0 mW, 76 %
acpicpu0: T3: I/O, lat 1 us, pow 0 mW, 64 %
acpicpu0: T4: I/O, lat 1 us, pow 0 mW, 52 %
acpicpu0: T5: I/O, lat 1 us, pow 0 mW, 40 %
acpicpu0: T6: I/O, lat 1 us, pow 0 mW, 28 %
acpicpu0: T7: I/O, lat 1 us, pow 0 mW, 16 %
acpicpu1 at cpu1: ACPI CPU
acpicpu2 at cpu2: ACPI CPU
acpicpu3 at cpu3: ACPI CPU
timecounter: Timecounter "clockinterrupt" frequency 100 Hz quality 0
uhub0 at usb0: NetBSD (0x0000) xHCI root hub (0x0000), class 9/0, rev 3.00/1.00, addr 0
uhub0: 2 ports with 2 removable, self powered
uhub1 at usb1: NetBSD (0x0000) xHCI root hub (0x0000), class 9/0, rev 2.00/1.00, addr 0
uhub1: 2 ports with 2 removable, self powered
IPsec: Initialized Security Association Processing.
uhub2 at usb2: NetBSD (0x0000) OHCI root hub (0x0000), class 9/0, rev 1.00/1.00, addr 1
uhub2: 4 ports with 4 removable, self powered
uhub3 at usb5: NetBSD (0x0000) EHCI root hub (0x0000), class 9/0, rev 2.00/1.00, addr 1
uhub3: 4 ports with 4 removable, self powered
uhub4 at usb4: NetBSD (0x0000) OHCI root hub (0x0000), class 9/0, rev 1.00/1.00, addr 1
uhub4: 4 ports with 4 removable, self powered
uhub5 at usb3: NetBSD (0x0000) EHCI root hub (0x0000), class 9/0, rev 2.00/1.00, addr 1
uhub5: 4 ports with 4 removable, self powered
ahcisata0 port 0: device present, speed: 6.0Gb/s
ahcisata0 port 1: device present, speed: 6.0Gb/s
wd0 at atabus0 drive 0
wd0: <HGST HTS721010A9E630>
wd0: drive supports 16-sector PIO transfers, LBA48 addressing
wd0: 931 GB, 1938021 cyl, 16 head, 63 sec, 512 bytes/sect x 1953525168 sectors (4096 bytes/physsect)
uhub6 at uhub4 port 2: Mitsumi Electric (0x05ac) Hub in Apple Extended USB Keyboard (0x1003), class 9/0, rev 1.10/4.10, addr 2
uhub6: 3 ports with 2 removable, bus powered
wd0: GPT GUID: bac2ec41-8302-4eef-9e8c-1dbead4ed9b7
dk0 at wd0: "EFIa", 262144 blocks at 128, type: msdos
dk1 at wd0: "1tbraida", 1886153984 blocks at 262272, type: raidframe
dk2 at wd0: "1tbswapa", 67108864 blocks at 1886416256, type: swap
wd0: drive supports PIO mode 4, DMA mode 2, Ultra-DMA mode 6 (Ultra/133), WRITE DMA FUA, NCQ (32 tags) w/PRIO
wd0(ahcisata0:0:0): using PIO mode 4, DMA mode 2, Ultra-DMA mode 6 (Ultra/133) (using DMA), NCQ (31 tags) w/PRIO
wd1 at atabus1 drive 0
wd1: <HGST HTS721010A9E630>
wd1: drive supports 16-sector PIO transfers, LBA48 addressing
wd1: 931 GB, 1938021 cyl, 16 head, 63 sec, 512 bytes/sect x 1953525168 sectors (4096 bytes/physsect)
wd1: GPT GUID: 70f43314-bf77-43a6-a78d-c5bd834c03ea
dk3 at wd1: "EFIb", 262144 blocks at 128, type: msdos
dk4 at wd1: "1tbraidb", 1886153984 blocks at 262272, type: raidframe
dk5 at wd1: "1tbswapb", 67108864 blocks at 1886416256, type: swap
wd1: drive supports PIO mode 4, DMA mode 2, Ultra-DMA mode 6 (Ultra/133), WRITE DMA FUA, NCQ (32 tags) w/PRIO
wd1(ahcisata0:1:0): using PIO mode 4, DMA mode 2, Ultra-DMA mode 6 (Ultra/133) (using DMA), NCQ (31 tags) w/PRIO
uhidev0 at uhub6 port 3 configuration 1 interface 0
uhidev0: Mitsumi Electric (0x05ac) Apple Extended USB Keyboard (0x020b), rev 1.10/4.10, addr 3, iclass 3/1
ukbd0 at uhidev0
wskbd0 at ukbd0: console keyboard
uhidev1 at uhub6 port 3 configuration 1 interface 1
uhidev1: Mitsumi Electric (0x05ac) Apple Extended USB Keyboard (0x020b), rev 1.10/4.10, addr 3, iclass 3/0
uhidev1: 3 report ids
uhid0 at uhidev1 reportid 2: input=1, output=0, feature=0
uhid1 at uhidev1 reportid 3: input=3, output=0, feature=0
swwdog0: software watchdog initialized
WARNING: findroot: double match for boot device (bootinfo/bootwedge:wd0 bootinfo/bootwedge:wd1)
raid0: RAID Level 1
raid0: Components: /dev/dk1 /dev/dk4
raid0: Total Sectors: 1886153856 (920973 MB)
raid0: GPT GUID: 220c2c59-70d9-4478-9dd1-77c39f6189f5
dk6 at raid0: "mirrorffs", 1886153600 blocks at 128, type: ffs
boot device: dk6
root on dk6 dumps on dk2
root file system type: ffs
kern.module.path=/stand/amd64/11.0/modules
[drm] initializing kernel modesetting (KABINI 0x1002:0x9830 0x1462:0x7865 0x00).
[drm] register mmio base: 0xfeb00000
[drm] register mmio size: 262144
[drm] doorbell mmio base: 0xD0000000
[drm] doorbell mmio size: 8388608
ATOM BIOS: AMD
radeon0: VRAM: 512M 0x0000000000000000 - 0x000000001FFFFFFF (512M used)
radeon0: GTT: 2048M 0x0000000020000000 - 0x000000009FFFFFFF
[drm] Detected VRAM RAM=200M, BAR=256M
[drm] RAM width 128bits DDR
Zone kernel: Available graphics memory: 9007199251494812 KiB
Zone dma32: Available graphics memory: 2097152 KiB
[drm] radeon: 512M of VRAM memory ready
[drm] radeon: 2048M of GTT memory ready.
[drm] Loading kabini Microcode
entropy: best effort
[drm] Internal thermal controller without fan control
[drm] radeon: dpm initialized
[drm] Found UVD firmware Version: 1.64 Family ID: 9
[drm] Found VCE firmware/feedback version 40.2.2 / 15!
[drm] GART: num cpu pages 524288, num gpu pages 524288
[drm] PCIE GART of 2048M enabled (table at 0x000000000030E000).
radeon0: WB enabled
radeon0: fence driver on ring 0 use gpu addr 0x0000000020000c00 and cpu addr 0x0xffff8c596af20c00
radeon0: fence driver on ring 1 use gpu addr 0x0000000020000c04 and cpu addr 0x0xffff8c596af20c04
radeon0: fence driver on ring 2 use gpu addr 0x0000000020000c08 and cpu addr 0x0xffff8c596af20c08
radeon0: fence driver on ring 3 use gpu addr 0x0000000020000c0c and cpu addr 0x0xffff8c596af20c0c
radeon0: fence driver on ring 4 use gpu addr 0x0000000020000c10 and cpu addr 0x0xffff8c596af20c10
radeon0: fence driver on ring 5 use gpu addr 0x0000000000078d30 and cpu addr 0x0xffff8c892a0f8d30
radeon0: fence driver on ring 6 use gpu addr 0x0000000020000c18 and cpu addr 0x0xffff8c596af20c18
radeon0: fence driver on ring 7 use gpu addr 0x0000000020000c1c and cpu addr 0x0xffff8c596af20c1c
[drm] Supports vblank timestamp caching Rev 2 (21.10.2013).
[drm] Driver supports precise vblank timestamp query.
radeon0: radeon: using MSI.
radeon0: interrupting at msi5 vec 0 (radeon0)
[drm] radeon: irq initialized.
[drm] ring test on 0 succeeded in 3 usecs
[drm] ring test on 1 succeeded in 3 usecs
[drm] ring test on 2 succeeded in 3 usecs
[drm] ring test on 3 succeeded in 4 usecs
[drm] ring test on 4 succeeded in 4 usecs
[drm] ring test on 5 succeeded in 2 usecs
[drm] UVD initialized successfully.
[drm] ring test on 6 succeeded in 15 usecs
[drm] ring test on 7 succeeded in 4 usecs
[drm] VCE initialized successfully.
[drm] ib test on ring 0 succeeded in 0 usecs
[drm] ib test on ring 1 succeeded in 0 usecs
[drm] ib test on ring 2 succeeded in 0 usecs
[drm] ib test on ring 3 succeeded in 0 usecs
[drm] ib test on ring 4 succeeded in 0 usecs
[drm] ib test on ring 5 succeeded
[drm] ib test on ring 6 succeeded
[drm] ib test on ring 7 succeeded
[drm] Radeon Display Connectors
[drm] Connector 0:
[drm] DVI-D-1
[drm] HPD1
[drm] DDC: 0x6530 0x6530 0x6534 0x6534 0x6538 0x6538 0x653c 0x653c
[drm] Encoders:
[drm] DFP1: INTERNAL_UNIPHY
[drm] Connector 1:
[drm] HDMI-A-1
[drm] HPD2
[drm] DDC: 0x6540 0x6540 0x6544 0x6544 0x6548 0x6548 0x654c 0x654c
[drm] Encoders:
[drm] DFP2: INTERNAL_UNIPHY
[drm] Connector 2:
[drm] VGA-1
[drm] DDC: 0x65c0 0x65c0 0x65c4 0x65c4 0x65c8 0x65c8 0x65cc 0x65cc
[drm] Encoders:
[drm] CRT1: INTERNAL_KLDSCP_DAC1
radeondrmkmsfb0 at radeon0
[drm] Initialized radeon 2.50.0 20080528 for radeon0 on minor 0
radeondrmkmsfb0: framebuffer at 0xc0722000, size 1920x1080, depth 32, stride 7680
wsdisplay0 at radeondrmkmsfb0 kbdmux 1: console (default, vt100 emulation), using wskbd0
wsmux1: connecting to wsdisplay0
entropy: ready
From: mlelstv@serpens.de (Michael van Elst)
To: gnats-bugs@netbsd.org
Cc:
Subject: Re: kern/60180: radeon* is problematically slow
Date: Fri, 10 Apr 2026 07:13:48 -0000 (UTC)
gnats-admin@NetBSD.org ("john@klos.com via gnats") writes:
>While the cat is running on the Radeon console, the whole system becomes significantly
>slower:
That's not related to Radeon. Any kind of output to a framebuffer
console is slow, in particular when there is no hardware support
for scrolling.
The whole system slows down because console output is done under
KERNEL_LOCK.
I use a patched wscons that avoids this. It probably leaves a
small chance for a race that can disrupt the display. I sometimes
see it for e.g. panic messages.
Index: wsdisplay_vcons.c
===================================================================
RCS file: /cvsroot/src/sys/dev/wscons/wsdisplay_vcons.c,v
retrieving revision 1.70
diff -p -u -r1.70 wsdisplay_vcons.c
--- wsdisplay_vcons.c 28 Apr 2025 07:43:41 -0000 1.70
+++ wsdisplay_vcons.c 10 Apr 2026 07:05:30 -0000
@@ -215,7 +215,7 @@ vcons_init_common(struct vcons_data *vd,
vdp->wanted = NULL;
vdp->currenttype = def;
vdp->defaulttype = def;
- callout_init(&vdp->switch_callout, 0);
+ callout_init(&vdp->switch_callout, CALLOUT_MPSAFE);
callout_setfunc(&vdp->switch_callout, vcons_do_switch, vd);
#ifdef VCONS_DRAW_INTR
vdp->cells = 0;
@@ -234,7 +234,8 @@ vcons_init_common(struct vcons_data *vd,
#endif
#ifdef VCONS_DRAW_INTR
if (enable_intr) {
- vdp->intr_softint = softint_establish(SOFTINT_SERIAL,
+ vdp->intr_softint = softint_establish(
+ SOFTINT_SERIAL | SOFTINT_MPSAFE,
vcons_softintr, vd);
callout_init(&vdp->intr, CALLOUT_MPSAFE);
callout_setfunc(&vdp->intr, vcons_intr, vd);
@@ -766,8 +767,8 @@ void
vcons_update_screen(struct vcons_screen *scr)
{
#ifdef VCONS_DRAW_INTR
- uint32_t *charptr = scr->scr_chars;
- long *attrptr = scr->scr_attrs;
+ uint32_t *charptr = scr->scr_chars, c;
+ long *attrptr = scr->scr_attrs, a;
struct rasops_info *ri = &scr->scr_ri;
struct vcons_data *vd = scr->scr_vd;
struct vcons_data_private *vdp = vd->private;
@@ -799,12 +800,14 @@ vcons_update_screen(struct vcons_screen
* and we already made sure the screen we're
* working on is visible
*/
- if ((vdp->chars[boffset] != charptr[offset]) ||
- (vdp->attrs[boffset] != attrptr[offset])) {
- scr->putchar(ri, i, j,
- charptr[offset], attrptr[offset]);
- vdp->chars[boffset] = charptr[offset];
- vdp->attrs[boffset] = attrptr[offset];
+ c = charptr[offset];
+ a = attrptr[offset];
+
+ if ((vdp->chars[boffset] != c) ||
+ (vdp->attrs[boffset] != a)) {
+ scr->putchar(ri, i, j, c, a);
+ vdp->chars[boffset] = c;
+ vdp->attrs[boffset] = a;
}
offset++;
boffset++;
@@ -1379,20 +1382,26 @@ vcons_cursor_noread(void *cookie, int on
struct rasops_info *ri = cookie;
struct vcons_screen *scr = ri->ri_hw;
int offset = 0, ofs;
+ int orow, ocol;
#ifdef WSDISPLAY_SCROLLSUPPORT
offset = scr->scr_current_offset;
#endif
- ofs = offset + ri->ri_crow * ri->ri_cols + ri->ri_ccol;
+
+ orow = ri->ri_crow;
+ ocol = ri->ri_ccol;
+ ri->ri_crow = row;
+ ri->ri_ccol = col;
+
+ ofs = offset + orow * ri->ri_cols + ocol;
if ((ri->ri_flg & RI_CURSOR) &&
(((scr->scr_flags & VCONS_DONT_READ) != VCONS_DONT_READ) || on)) {
- scr->putchar(cookie, ri->ri_crow, ri->ri_ccol,
+ scr->putchar(cookie, orow, ocol,
scr->scr_chars[ofs], scr->scr_attrs[ofs]);
ri->ri_flg &= ~RI_CURSOR;
}
- ri->ri_crow = row;
- ri->ri_ccol = col;
- ofs = offset + ri->ri_crow * ri->ri_cols + ri->ri_ccol;
+
+ ofs = offset + row * ri->ri_cols + col;
if (on) {
scr->putchar(cookie, row, col, scr->scr_chars[ofs],
#ifdef VCONS_DEBUG_CURSOR_NOREAD
>Unformatted:
(Contact us)
$NetBSD: query-full-pr,v 1.51 2026/08/10 02:28:17 riastradh Exp $
$NetBSD: gnats_config.sh,v 1.10 2026/05/13 22:00:09 riastradh Exp $
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