ATA/100 drive on PCI ATA/100 controller was very fast under 2.4.0 and
2.4.2, but becomes *very* slow under 2.4.3
[2.] Full description of the problem/report:
I have an ATA/100 controller card in a PCI slot, and an ATA/100 drive
hanging off it. Under kernels 2.4.0 and 2.4.2, /sbin/hdparm -t /dev/hde
reported around 36.6 MB/sec for it, but under 2.4.3 it only gives
something in the range of 4.8 - 5.1 MB/sec. This is true for 2.4.3-ac5,
-ac6, and -ac7.
Under X, the mouse is very sluggish while hdparm is running, and some
animated applications seem to stall out as well. They recover as soon
as the test is finished.
Under a console login, I got the message "Spurious 8259A interrupt:
IRQ7" when I ran the hdparm test.
The drive and controller are both Maxtor parts of recent vintage. Alas,
manufacturers are getting bad about not putting a model number on their
products anymore, so if you need more than you can derive from the
listings below, drop me a line and I'll open my case and try to find
something on the parts' labels.
Before you get too bogged down in the details of my configuration just
below, skip to the bottom and see my note on interrupts.
[3.] Keywords (i.e., modules, networking, kernel):
ata, disk, controller, pci, interrupt, 2.4.3
[4.] Kernel version (from /proc/version):
The problem occurs under 2.4.3-ac5, -ac6, -ac7; it does *not* appear
under 2.4.2.
[5.] Output of Oops.. message (if applicable) with symbolic information
resolved (see Documentation/oops-tracing.txt)
N/A, however I do get the "Spurious 8259A interrupt: IRQ7" in my
/var/log/messages file intermittently.
[6.] A small shell script or example program which triggers the
problem (if possible)
N/A, but I can readily reproduce it by rebooting to the various kernels.
[7.] Environment
[7.1.] Software (add the output of the ver_linux script here)
Linux pollux.dioscuri 2.4.3-ac7 #1 Mon Apr 16 12:38:43 GMT-6 2001 i686
unknown
Gnu C 2.96
Gnu make 3.79.1
binutils 2.10.1.0.2
util-linux 2.10p
mount 2.10r
modutils 2.4.2
e2fsprogs 1.19
reiserfsprogs 3.x.0b
PPP 2.4.0
Linux C Library 2.2.1
Dynamic linker (ldd) 2.2.1
Procps 2.0.7
Net-tools 1.57
Console-tools 0.3.3
Sh-utils 2.0
Modules Loaded ide-cd cdrom ppp_async ppp_generic slhc
binfmt_misc via686a eeprom lm80 adm1021 sensors i2c-isa i2c-viapro
i2c-core autofs 8139too ipchains sb sb_lib uart401 sound soundcore
[7.2.] Processor information (from /proc/cpuinfo):
processor : 0
vendor_id : AuthenticAMD
cpu family : 6
model : 4
model name : AMD Athlon(tm) Processor
stepping : 2
cpu MHz : 1202.769
cache size : 256 KB
fdiv_bug : no
hlt_bug : no
f00f_bug : no
coma_bug : no
fpu : yes
fpu_exception : yes
cpuid level : 1
wp : yes
flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge
mca cmov pat pse36 mmx fxsr syscall mmxext 3dnowext 3dnow
bogomips : 2398.61
[7.3.] Module information (from /proc/modules):
ide-cd 26768 0 (autoclean)
cdrom 28000 0 (autoclean) [ide-cd]
ppp_async 6096 1 (autoclean)
ppp_generic 13200 3 (autoclean) [ppp_async]
slhc 4432 1 (autoclean) [ppp_generic]
binfmt_misc 5824 1
via686a 8176 0
eeprom 2960 0
lm80 5296 0
adm1021 5248 0 (unused)
sensors 5920 0 [via686a eeprom lm80 adm1021]
i2c-isa 1168 0 (unused)
i2c-viapro 3664 0 (unused)
i2c-core 12400 0 [via686a eeprom lm80 adm1021 sensors
i2c-isa i2c-viapro]
autofs 9248 1 (autoclean)
8139too 10656 1 (autoclean)
ipchains 29600 0 (unused)
sb 7136 0
sb_lib 32928 0 [sb]
uart401 6224 0 [sb_lib]
sound 53744 0 [sb_lib uart401]
soundcore 3504 5 [sb_lib sound]
[7.4.] Loaded driver and hardware information (/proc/ioports,
/proc/iomem)
0000-001f : dma1
0020-003f : pic1
0040-005f : timer
0060-006f : keyboard
0070-007f : rtc
0080-008f : dma page reg
00a0-00bf : pic2
00c0-00df : dma2
00f0-00ff : fpu
0170-0177 : ide1
01f0-01f7 : ide0
0213-0213 : isapnp read
0220-022f : soundblaster
02f8-02ff : serial(auto)
0330-0333 : MPU-401 UART
0376-0376 : ide1
03c0-03df : vga+
03f6-03f6 : ide0
03f8-03ff : serial(auto)
0a79-0a79 : isapnp write
0cf8-0cff : PCI conf1
5000-500f : VIA Technologies, Inc. VT82C686 [Apollo Super ACPI]
5000-5007 : via2-smbus
6000-607f : VIA Technologies, Inc. VT82C686 [Apollo Super ACPI]
6000-607f : via686a
c000-c00f : VIA Technologies, Inc. Bus Master IDE
c000-c007 : ide0
c008-c00f : ide1
cc00-cc07 : Promise Technology, Inc. 20267
cc00-cc07 : ide3
d000-d003 : Promise Technology, Inc. 20267
d002-d002 : ide3
d400-d407 : Promise Technology, Inc. 20267
d400-d407 : ide2
d800-d803 : Promise Technology, Inc. 20267
d802-d802 : ide2
dc00-dc3f : Promise Technology, Inc. 20267
dc00-dc07 : ide2
dc08-dc0f : ide3
dc10-dc3f : PDC20267
e000-e007 : US Robotics/3Com 56K FaxModem Model 5610
e000-e007 : serial(auto)
e400-e4ff : Realtek Semiconductor Co., Ltd. RTL-8139
e400-e4ff : 8139too
00000000-0009fbff : System RAM
0009fc00-0009ffff : reserved
000a0000-000bffff : Video RAM area
000c0000-000c7fff : Video ROM
000cc000-000cdfff : Extension ROM
000f0000-000fffff : System ROM
00100000-2fffffff : System RAM
00100000-001c7149 : Kernel code
001c714a-001fd77f : Kernel data
d0000000-d3ffffff : VIA Technologies, Inc. VT8363/8365 [KT133/KM133]
d4000000-d5ffffff : PCI Bus #01
d4000000-d5ffffff : Matrox Graphics, Inc. MGA G400 AGP
d6000000-d8ffffff : PCI Bus #01
d6000000-d6003fff : Matrox Graphics, Inc. MGA G400 AGP
d7000000-d77fffff : Matrox Graphics, Inc. MGA G400 AGP
da000000-da01ffff : Promise Technology, Inc. 20267
da020000-da0200ff : Realtek Semiconductor Co., Ltd. RTL-8139
da020000-da0200ff : 8139too
ffff0000-ffffffff : reserved
[7.5.] PCI information ('lspci -vvv' as root)
00:00.0 Host bridge: VIA Technologies, Inc. VT8363/8365 [KT133/KM133]
(rev 03)
Control: I/O- Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr-
Stepping- SERR- FastB2B-
Status: Cap+ 66Mhz- UDF- FastB2B- ParErr- DEVSEL=medium >TAbort-
<TAbort- <MAbort+ >SERR- <PERR-
Latency: 8
Region 0: Memory at d0000000 (32-bit, prefetchable) [size=64M]
Capabilities: [a0] AGP version 2.0
Status: RQ=31 SBA+ 64bit- FW+ Rate=x1,x2
Command: RQ=0 SBA- AGP- 64bit- FW- Rate=<none>
Capabilities: [c0] Power Management version 2
Flags: PMEClk- DSI- D1- D2- AuxCurrent=0mA
PME(D0-,D1-,D2-,D3hot-,D3cold-)
Status: D0 PME-Enable- DSel=0 DScale=0 PME-
00:01.0 PCI bridge: VIA Technologies, Inc. VT8363/8365 [KT133/KM133 AGP]
(prog-if 00 [Normal decode])
Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr-
Stepping- SERR- FastB2B-
Status: Cap+ 66Mhz+ UDF- FastB2B- ParErr- DEVSEL=medium >TAbort-
<TAbort- <MAbort+ >SERR- <PERR-
Latency: 0
Bus: primary=00, secondary=01, subordinate=01, sec-latency=0
I/O behind bridge: 0000f000-00000fff
Memory behind bridge: d6000000-d8ffffff
Prefetchable memory behind bridge: d4000000-d5ffffff
BridgeCtl: Parity- SERR- NoISA+ VGA+ MAbort- >Reset- FastB2B-
Capabilities: [80] Power Management version 2
Flags: PMEClk- DSI- D1+ D2- AuxCurrent=0mA
PME(D0-,D1-,D2-,D3hot-,D3cold-)
Status: D0 PME-Enable- DSel=0 DScale=0 PME-
00:07.0 ISA bridge: VIA Technologies, Inc. VT82C686 [Apollo Super South]
(rev 40)
Subsystem: VIA Technologies, Inc. VT82C686/A PCI to ISA Bridge
Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr-
Stepping+ SERR- FastB2B-
Status: Cap+ 66Mhz- UDF- FastB2B- ParErr- DEVSEL=medium >TAbort-
<TAbort- <MAbort- >SERR- <PERR-
Latency: 0
Capabilities: [c0] Power Management version 2
Flags: PMEClk- DSI- D1- D2- AuxCurrent=0mA
PME(D0-,D1-,D2-,D3hot-,D3cold-)
Status: D0 PME-Enable- DSel=0 DScale=0 PME-
00:07.1 IDE interface: VIA Technologies, Inc. Bus Master IDE (rev 06)
(prog-if 8a [Master SecP PriP])
Subsystem: VIA Technologies, Inc. Bus Master IDE
Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr-
Stepping- SERR- FastB2B-
Status: Cap+ 66Mhz- UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort-
<TAbort- <MAbort- >SERR- <PERR-
Latency: 32
Region 4: I/O ports at c000 [size=16]
Capabilities: [c0] Power Management version 2
Flags: PMEClk- DSI- D1- D2- AuxCurrent=0mA
PME(D0-,D1-,D2-,D3hot-,D3cold-)
Status: D0 PME-Enable- DSel=0 DScale=0 PME-
00:07.4 Bridge: VIA Technologies, Inc. VT82C686 [Apollo Super ACPI] (rev
40)
Subsystem: VIA Technologies, Inc. VT82C686 [Apollo Super ACPI]
Control: I/O- Mem- BusMaster- SpecCycle- MemWINV- VGASnoop- ParErr-
Stepping- SERR- FastB2B-
Status: Cap+ 66Mhz- UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort-
<TAbort- <MAbort- >SERR- <PERR-
Capabilities: [68] Power Management version 2
Flags: PMEClk- DSI- D1- D2- AuxCurrent=0mA
PME(D0-,D1-,D2-,D3hot-,D3cold-)
Status: D0 PME-Enable- DSel=0 DScale=0 PME-
00:0a.0 Unknown mass storage controller: Promise Technology, Inc. 20267
(rev 02)
Subsystem: Promise Technology, Inc.: Unknown device 4d33
Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr-
Stepping- SERR- FastB2B-
Status: Cap+ 66Mhz- UDF- FastB2B- ParErr- DEVSEL=medium >TAbort-
<TAbort- <MAbort- >SERR- <PERR-
Latency: 32
Interrupt: pin A routed to IRQ 11
Region 0: I/O ports at d400 [size=8]
Region 1: I/O ports at d800 [size=4]
Region 2: I/O ports at cc00 [size=8]
Region 3: I/O ports at d000 [size=4]
Region 4: I/O ports at dc00 [size=64]
Region 5: Memory at da000000 (32-bit, non-prefetchable) [size=128K]
Expansion ROM at <unassigned> [disabled] [size=64K]
Capabilities: [58] Power Management version 1
Flags: PMEClk- DSI- D1- D2- AuxCurrent=0mA
PME(D0-,D1-,D2-,D3hot-,D3cold-)
Status: D0 PME-Enable- DSel=0 DScale=0 PME-
00:0b.0 Serial controller: US Robotics/3Com 56K FaxModem Model 5610 (rev
01) (prog-if 02 [16550])
Subsystem: US Robotics/3Com: Unknown device 00d7
Control: I/O+ Mem- BusMaster- SpecCycle- MemWINV- VGASnoop- ParErr-
Stepping- SERR- FastB2B-
Status: Cap+ 66Mhz- UDF- FastB2B- ParErr- DEVSEL=medium >TAbort-
<TAbort- <MAbort- >SERR- <PERR-
Interrupt: pin A routed to IRQ 9
Region 0: I/O ports at e000 [size=8]
Capabilities: [dc] Power Management version 2
Flags: PMEClk- DSI- D1- D2+ AuxCurrent=0mA
PME(D0+,D1-,D2+,D3hot+,D3cold+)
Status: D0 PME-Enable- DSel=0 DScale=2 PME-
00:0c.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL-8139
(rev 10)
Subsystem: Realtek Semiconductor Co., Ltd. RT8139
Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr-
Stepping- SERR- FastB2B-
Status: Cap+ 66Mhz- UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort-
<TAbort- <MAbort- >SERR- <PERR-
Latency: 32 (8000ns min, 16000ns max)
Interrupt: pin A routed to IRQ 11
Region 0: I/O ports at e400 [size=256]
Region 1: Memory at da020000 (32-bit, non-prefetchable) [size=256]
Expansion ROM at <unassigned> [disabled] [size=64K]
Capabilities: [50] Power Management version 2
Flags: PMEClk- DSI- D1+ D2+ AuxCurrent=375mA
PME(D0-,D1+,D2+,D3hot+,D3cold+)
Status: D0 PME-Enable+ DSel=0 DScale=0 PME-
01:00.0 VGA compatible controller: Matrox Graphics, Inc. MGA G400 AGP
(rev 82) (prog-if 00 [VGA])
Subsystem: Matrox Graphics, Inc.: Unknown device 0641
Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr-
Stepping- SERR- FastB2B-
Status: Cap+ 66Mhz- UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort-
<TAbort- <MAbort- >SERR- <PERR-
Latency: 64 (4000ns min, 8000ns max), cache line size 08
Interrupt: pin A routed to IRQ 10
Region 0: Memory at d4000000 (32-bit, prefetchable) [size=32M]
Region 1: Memory at d6000000 (32-bit, non-prefetchable) [size=16K]
Region 2: Memory at d7000000 (32-bit, non-prefetchable) [size=8M]
Expansion ROM at <unassigned> [disabled] [size=128K]
Capabilities: [dc] Power Management version 2
Flags: PMEClk- DSI+ D1- D2- AuxCurrent=0mA
PME(D0-,D1-,D2-,D3hot-,D3cold-)
Status: D0 PME-Enable- DSel=0 DScale=0 PME-
Capabilities: [f0] AGP version 2.0
Status: RQ=31 SBA+ 64bit- FW- Rate=x1,x2
Command: RQ=31 SBA+ AGP+ 64bit- FW- Rate=x1
[7.6.] SCSI information (from /proc/scsi/scsi)
N/A
[7.7.] Other information that might be relevant to the problem
(please look in /proc and include all information that you
think to be relevant):
CPU0
0: 236537 XT-PIC timer
1: 8093 XT-PIC keyboard
2: 0 XT-PIC cascade
4: 3 XT-PIC serial
5: 2 XT-PIC soundblaster
8: 1 XT-PIC rtc
9: 95604 XT-PIC serial
11: 276854 XT-PIC ide2, ide3, eth0
12: 85293 XT-PIC PS/2 Mouse
14: 7542 XT-PIC ide0
15: 69059 XT-PIC ide1
NMI: 0
LOC: 236502
ERR: 90
MIS: 0
[X.] Other notes, patches, fixes, workarounds:
Between 2.4.2 and 2.4.3 something seems to have jacked my interrupts
around. I had all my toys working under 2.4.2, but the first time I
booted to 2.4.3 the Kudzu program "detected" that I had removed my PCI
modem and "detected" that I had a new one as well, and thus switched it
from ttyS2 to ttyS4. It wants to do the opposite if I ever boot back to
2.4.2.
N.B. -- I will be glad to provide more info or run some tests, but I am
not a linux-kernel subscriber, so please CC me if you reply with such
requests.
Thanks,
Bobby Bryant
Austin, Texas
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