Re: External USB2 HDD affects speed hda

[Grant Coady]

On Thu, 02 Jun 2005 15:11:12 +0200, Rene Herman <rene.herman@xxxxxxxxxxxx> wrote:
>
>In fact, anyone who could do the same would be much welcome. Certainly 
>with the EHCI controller on a PCI card, and even more certainly with a 
>VIA VT6212 EHCI controller on a PCI card.

Not quite what you asked, following is with 6GB laptop HDD in USB 
enclosure on /dev/sdb, main drive is Seagate SATA /dev/sda. 
More hardware info on http://scatter.mine.nu/test/boxen/sempro/ 
 includes an lspci -v, mobo, CPU, HDD info

nVidia driver not loaded, box running headless to ssh terminal.
USB optical mouse only other device plugged in
USB drive plugged in prior to reboot both times

Summary: interrupts being lost on latest?  No HDD slowdown. 
 All USB ports use IRQ18, SATA on IRQ17

More info on request.

--Grant.

stable then latest:

2.6.11.11: after many runs, plus hardware info:

root@sempro:~# cat /sys/class/usb_host/usb1/registers
bus pci, device 0000:00:10.4 (driver 10 Dec 2004)
EHCI 1.00, hcd state 1
structural params 0x00004208
capability params 0x00006872
status a008 Async Recl FLR
command 010009 (park)=0 ithresh=1 period=256 RUN
intrenable 37 IAA FATAL PCD ERR INT
uframe 02c2
port 1 status 003402 POWER OWNER sig=k  CSC
port 2 status 001000 POWER sig=se0
port 3 status 001000 POWER sig=se0
port 4 status 001000 POWER sig=se0
port 5 status 001005 POWER sig=se0  PE CONNECT
port 6 status 001000 POWER sig=se0
port 7 status 001000 POWER sig=se0
port 8 status 001000 POWER sig=se0
irq normal 5470 err 0 reclaim 3645 (lost 0)
complete 5904 unlink 0
root@sempro:~# hdparm -Tt /dev/sda

/dev/sda:
 Timing cached reads:   1160 MB in  2.01 seconds = 578.35 MB/sec
HDIO_DRIVE_CMD(null) (wait for flush complete) failed: Inappropriate ioctl for device
 Timing buffered disk reads:  170 MB in  3.01 seconds =  56.51 MB/sec
HDIO_DRIVE_CMD(null) (wait for flush complete) failed: Inappropriate ioctl for device
root@sempro:~# hdparm -Tt /dev/sdb

/dev/sdb:
 Timing cached reads:   1172 MB in  2.00 seconds = 584.63 MB/sec
 Timing buffered disk reads:   26 MB in  3.17 seconds =   8.21 MB/sec

root@sempro:~# lspci
00:00.0 Host bridge: VIA Technologies, Inc. VT8378 [KM400/A] Chipset Host Bridge
00:01.0 PCI bridge: VIA Technologies, Inc. VT8237 PCI Bridge
00:0f.0 RAID bus controller: VIA Technologies, Inc. VIA VT6420 SATA RAID Controller (rev 80)
00:0f.1 IDE interface: VIA Technologies, Inc. VT82C586A/B/VT82C686/A/B/VT823x/A/C PIPC Bus Master IDE (rev 06)
00:10.0 USB Controller: VIA Technologies, Inc. VT82xxxxx UHCI USB 1.1 Controller (rev 81)
00:10.1 USB Controller: VIA Technologies, Inc. VT82xxxxx UHCI USB 1.1 Controller (rev 81)
00:10.2 USB Controller: VIA Technologies, Inc. VT82xxxxx UHCI USB 1.1 Controller (rev 81)
00:10.3 USB Controller: VIA Technologies, Inc. VT82xxxxx UHCI USB 1.1 Controller (rev 81)
00:10.4 USB Controller: VIA Technologies, Inc. USB 2.0 (rev 86)
00:11.0 ISA bridge: VIA Technologies, Inc. VT8237 ISA bridge [KT600/K8T800/K8T890 South]
00:11.5 Multimedia audio controller: VIA Technologies, Inc. VT8233/A/8235/8237 AC97 Audio Controller (rev 60)
00:12.0 Ethernet controller: VIA Technologies, Inc. VT6102 [Rhine-II] (rev 78)
01:00.0 VGA compatible controller: nVidia Corporation NV18 [GeForce4 MX 440 AGP 8x] (rev a2)

root@sempro:~# lsmod
Module                  Size  Used by
w83627hf               28456  0
i2c_sensor              2944  1 w83627hf
usb_storage            41024  0
via_agp                 7552  1
agpgart                28456  1 via_agp
ide_floppy             16704  0
root@sempro:~#

2.6.12-rc5-mm2a third run

/dev/sda:
 Timing cached reads:   1096 MB in  2.00 seconds = 546.87 MB/sec
HDIO_DRIVE_CMD(null) (wait for flush complete) failed: Inappropriate ioctl for device
 Timing buffered disk reads:  172 MB in  3.03 seconds =  56.72 MB/sec
HDIO_DRIVE_CMD(null) (wait for flush complete) failed: Inappropriate ioctl for device
root@sempro:~# hdparm -tT /dev/sdb

/dev/sdb:
 Timing cached reads:   1224 MB in  2.00 seconds = 610.74 MB/sec
 Timing buffered disk reads:   26 MB in  3.16 seconds =   8.23 MB/sec
root@sempro:~# cat /sys/class/usb_host/usb1/registers
bus pci, device 0000:00:10.4 (driver 10 Dec 2004)
VIA Technologies, Inc. USB 2.0
EHCI 1.00, hcd state 1
ownership 01000001 linux
SMI sts/enable 0xe0080000
structural params 0x00004208
capability params 0x00006872
status 0008 FLR
command 010009 (park)=0 ithresh=1 period=256 RUN
intrenable 37 IAA FATAL PCD ERR INT
uframe 2365
port 1 status 003402 POWER OWNER sig=k CSC
port 2 status 001000 POWER sig=se0
port 3 status 001000 POWER sig=se0
port 4 status 001000 POWER sig=se0
port 5 status 001005 POWER sig=se0 PE CONNECT
port 6 status 001000 POWER sig=se0
port 7 status 001000 POWER sig=se0
port 8 status 001000 POWER sig=se0
irq normal 8184 err 0 reclaim 5387 (lost 82)
complete 8785 unlink 0
root@sempro:~# uname -a
Linux sempro 2.6.12-rc5-mm2a #5 Fri Jun 3 08:14:01 EST 2005 i686 unknown unknown GNU/Linux
root@sempro:~# cat /proc/interrupts
           CPU0
  0:     242764    IO-APIC-edge  timer
  1:         20    IO-APIC-edge  i8042
  8:          1    IO-APIC-edge  rtc
  9:          0   IO-APIC-level  acpi
 14:         13    IO-APIC-edge  ide0
 15:         68    IO-APIC-edge  ide1
 16:        744   IO-APIC-level  eth0
 17:       7441   IO-APIC-level  libata
 18:      13314   IO-APIC-level  ehci_hcd:usb1, uhci_hcd:usb2, uhci_hcd:usb3, uhci_hcd:usb4, uhci_hcd:usb5
 19:          0   IO-APIC-level  VIA8237
NMI:          0
LOC:     242657
ERR:          0
MIS:          0

#end :o)

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