Symptom: Extremely slow performance on USB scanner with SMP kernel, about 20x what it should be (non-SMP)
New Info: Based on advice from the sane-devel list, I booted with a non-SMP kernel and the scanner is not at full speed. What can I do to debug this further so a fix can be developed? The problem is the same with either usb-uhci.o or uhci.o, and with or without SANE. The evidence is pointing to a USB/SMP issue. -JSP > 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] > 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] _______________________________________________ [EMAIL PROTECTED] To unsubscribe, use the last form field at: https://lists.sourceforge.net/lists/listinfo/linux-usb-users
