I'm getting about 20x slower throughput from my USB scanner on Linux
vs. Windows, and it looks like it's the USB subsystem. Everything is
working, just at a crawl's pace (takes 2 hours to scan vs. 10
minutes). Basicly, it is unusable. I would appreciate any help in
debugging this:
Is this to be expected?
Can anything be tweaked in the USB to get a better measure of
throughput?
Are there any known issues with my chipset?
My Stats:
Dual-PIII,667MHz, 512MB, Tyan Tiger 133 (S1834) Motherboard, uses Apollo Pro
133A Chipset. Kernel 2.4.13, also tried with 2.4.8 with no
difference.
[cat /proc/bus/pci/devices]
T: Bus=01 Lev=00 Prnt=00 Port=00 Cnt=00 Dev#= 1 Spd=12 MxCh= 2
B: Alloc= 0/900 us ( 0%), #Int= 0, #Iso= 0
D: Ver= 1.00 Cls=09(hub ) Sub=00 Port=00 MxPS= 8 #Cfgs= 1
P: Vendor=0000 ProdID=0000 Rev= 0.00
S: Product=USB UHCI Root Hub
S: SerialNumber=d400
C:* #Ifs= 1 Cfg#= 1 Atr=40 MxPwr= 0mA
I: If#= 0 Alt= 0 #EPs= 1 Cls=09(hub ) Sub=00 Port=00 Driver=hub
E: Ad=81(I) Atr=03(Int.) MxPS= 8 Ivl=255ms
T: Bus=01 Lev=01 Prnt=01 Port=01 Cnt=01 Dev#= 4 Spd=12 MxCh= 0
D: Ver= 1.10 Cls=ff(vend.) Sub=ff Port=ff MxPS= 8 #Cfgs= 1
P: Vendor=04b8 ProdID=0110 Rev= 3.02
S: Manufacturer=EPSON
S: Product=EPSON Scanner
C:* #Ifs= 1 Cfg#= 1 Atr=c0 MxPwr= 2mA
I: If#= 0 Alt= 0 #EPs= 2 Cls=ff(vend.) Sub=ff Port=ff
Driver=usbscanner
E: Ad=01(O) Atr=02(Bulk) MxPS= 64 Ivl= 0ms
E: Ad=82(I) Atr=02(Bulk) MxPS= 64 Ivl= 0ms
[lspci -v]
00:00.0 Host bridge: VIA Technologies, Inc. VT82C691 [Apollo PRO] (rev
c4)
Flags: bus master, medium devsel, latency 0
Memory at d8000000 (32-bit, prefetchable) [size=64M]
Capabilities: [a0] AGP version 2.0
Capabilities: [c0] Power Management version 2
00:01.0 PCI bridge: VIA Technologies, Inc. VT82C598 [Apollo MVP3 AGP]
(prog-if 00 [Normal decode])
Flags: bus master, 66Mhz, medium devsel, latency 0
Bus: primary=00, secondary=01, subordinate=01, sec-latency=0
Memory behind bridge: dc000000-ddffffff
Prefetchable memory behind bridge: d0000000-d7ffffff
Capabilities: [80] Power Management version 2
00:07.0 ISA bridge: VIA Technologies, Inc. VT82C596 ISA [Apollo PRO]
(rev 23)
Subsystem: VIA Technologies, Inc. VT82C596/A/B PCI to ISA
Bridge
Flags: bus master, stepping, medium devsel, latency 0
00:07.1 IDE interface: VIA Technologies, Inc. VT82C586 IDE [Apollo]
(rev 10) (prog-if 8a [Master SecP PriP])
Flags: bus master, medium devsel, latency 32
I/O ports at d000 [size=16]
Capabilities: [c0] Power Management version 2
00:07.2 USB Controller: VIA Technologies, Inc. VT82C586B USB (rev 11)
(prog-if 00 [UHCI])
Subsystem: Unknown device 0925:1234
Flags: bus master, medium devsel, latency 32, IRQ 11
I/O ports at d400 [size=32]
Capabilities: [80] Power Management version 2
00:07.3 Host bridge: VIA Technologies, Inc.: Unknown device 3050 (rev
30)
Flags: medium devsel
00:0f.0 Ethernet controller: National Semiconductor Corporation:
Unknown device 0020
Subsystem: Netgear: Unknown device f312
Flags: bus master, medium devsel, latency 32, IRQ 11
I/O ports at d800 [size=256]
Memory at df000000 (32-bit, non-prefetchable) [size=4K]
Expansion ROM at <unassigned> [disabled] [size=64K]
Capabilities: [40] Power Management version 2
00:10.0 Multimedia audio controller: Creative Labs SB Live! EMU10000
(rev 05)
Subsystem: Creative Labs CT4760 SBLive!
Flags: bus master, medium devsel, latency 32, IRQ 10
I/O ports at dc00 [size=32]
Capabilities: [dc] Power Management version 1
00:10.1 Input device controller: Creative Labs SB Live! (rev 05)
Subsystem: Creative Labs Gameport Joystick
Flags: bus master, medium devsel, latency 32
I/O ports at e000 [size=8]
Capabilities: [dc] Power Management version 1
00:12.0 Multimedia video controller: Brooktree Corporation Bt878 (rev
02)
Subsystem: Hauppauge computer works Inc.: Unknown device 13eb
Flags: bus master, medium devsel, latency 32, IRQ 5
Memory at df001000 (32-bit, prefetchable) [size=4K]
00:12.1 Multimedia controller: Brooktree Corporation Bt878 (rev 02)
Subsystem: Hauppauge computer works Inc.: Unknown device 13eb
Flags: bus master, medium devsel, latency 32, IRQ 5
Memory at df002000 (32-bit, prefetchable) [size=4K]
00:13.0 SCSI storage controller: Advanced System Products, Inc
ABP940-UW
Flags: bus master, medium devsel, latency 32, IRQ 11
I/O ports at e400 [size=64]
Memory at df003000 (32-bit, non-prefetchable) [size=256]
Expansion ROM at <unassigned> [disabled] [size=64K]
01:00.0 VGA compatible controller: nVidia Corporation NV15 (Geforce2
GTS) (rev a4) (prog-if 00 [VGA])
Subsystem: LeadTek Research Inc.: Unknown device 2840
Flags: bus master, 66Mhz, medium devsel, latency 32, IRQ 10
Memory at dc000000 (32-bit, non-prefetchable) [size=16M]
Memory at d0000000 (32-bit, prefetchable) [size=128M]
Expansion ROM at <unassigned> [disabled] [size=64K]
Capabilities: [60] Power Management version 1
Capabilities: [44] AGP version 2.0
[cat /proc/interrupts]
CPU0 CPU1
0: 738772 730682 IO-APIC-edge timer
1: 10887 11346 IO-APIC-edge keyboard
2: 0 0 XT-PIC cascade
5: 0 1 IO-APIC-level bttv
8: 1 0 IO-APIC-edge rtc
10: 23246 22744 IO-APIC-level EMU10K1
11: 189553 189338 IO-APIC-level advansys, usb-uhci, eth0
12: 81370 82479 IO-APIC-edge PS/2 Mouse
14: 12107 9016 IO-APIC-edge ide0
15: 1 5 IO-APIC-edge ide1
NMI: 1469386 1469386
LOC: 1469408 1469406
ERR: 0
MIS: 0
[lsmod]
Module Size Used by
scanner 8720 0 (unused)
usb-uhci 22608 0 (unused)
binfmt_misc 6464 1
emu10k1 62768 1
sound 60832 0 [emu10k1]
soundcore 4624 7 [emu10k1 sound]
ac97_codec 9344 0 [emu10k1]
nfsd 71232 8 (autoclean)
lp 5920 0
parport_pc 20448 1
parport 26304 1 [lp parport_pc]
nfs 79104 5 (autoclean)
lockd 51152 1 (autoclean) [nfsd nfs]
sunrpc 68352 1 (autoclean) [nfsd nfs lockd]
autofs4 10224 3 (autoclean)
af_packet 14000 1 (autoclean)
usbcore 53824 1 [scanner usb-uhci]
natsemi 14928 1 (autoclean)
nls_iso8859-1 2880 3 (autoclean)
isofs 27072 3 (autoclean)
inflate_fs 19520 0 (autoclean) [isofs]
loop 11280 6 (autoclean)
tuner 8528 1 (autoclean)
tvaudio 10400 1 (autoclean)
msp3400 14752 1 (autoclean)
bttv 60880 0 (unused)
videodev 5504 3 [bttv]
i2c-algo-bit 7328 1 [bttv]
i2c-core 13920 0 [tuner tvaudio msp3400 bttv
i2c-algo-bit]
rtc 6608 0 (autoclean)
reiserfs 160064 5
advansys 86828 0 (unused)
sd_mod 11416 0 (unused)
scsi_mod 96028 2 [advansys sd_mod]
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