usb/161793: poor EHCI usb2 i/o performance

[Chargen]

>Number:         161793
>Category:       usb
>Synopsis:       poor EHCI usb2 i/o performance
>Confidential:   no
>Severity:       non-critical
>Priority:       low
>Responsible:    freebsd-usb
>State:          open
>Quarter:        
>Keywords:       
>Date-Required:
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Wed Oct 19 03:50:03 UTC 2011
>Closed-Date:
>Last-Modified:
>Originator:     Chargen
>Release:        10.0-CURRENT
>Organization:
>Environment:
FreeBSD schwarzesonne 10.0-CURRENT FreeBSD 10.0-CURRENT #0: Tue Oct 18 21:40:49 CEST 2011     chargen at schwarzesonne:/usr/src/sys/i386/compile/SCHWARZESONNE  i386
>Description:
I did some OHCI/EHCI usb1/2 subsystem performance checks on CURRENT with 1 older generation 1gb USB memory stick and a newer 2GB USB memory stick. EHCI, usb2 UFS or MSDOSFS formatted gives about the same performance in FreeBSD, ~3MB/s and about 8~10 MB/s under Windows operating systems using the same hardware.

schwarzesonne# usbconfig dump_info | grep "480"
ugen2.1: <EHCI root HUB NEC> at usbus2, cfg=0 md=HOST spd=HIGH (480Mbps) pwr=SAVE
schwarzesonne# dmesg | grep "usbus2"
usbus2: EHCI version 1.0
usbus2: <NEC uPD 720100 USB 2.0 controller> on ehci0
usbus2: 480Mbps High Speed USB v2.0
ugen2.1: <NEC> at usbus2
uhub2: <NEC EHCI root HUB, class 9/0, rev 2.00/1.00, addr 1> on usbus2
ugen2.2: <Generic> at usbus2
umass0: <Generic Mass Storage, class 0/0, rev 2.00/1.41, addr 2> on usbus2
schwarzesonne# mount
/dev/da0p2 on / (ufs, local, noatime, journaled soft-updates)
devfs on /dev (devfs, local)
schwarzesonne# dmesg | grep "da1"
da1 at umass-sim0 bus 0 scbus4 target 0 lun 0
da1: <A60C0705 Flash Disk 8.07> Removable Direct Access SCSI-2 device
da1: 40.000MB/s transfers
da1: 999MB (2047998 512 byte sectors: 64H 32S/T 999C)
schwarzesonne# time dd if=/dev/zero of=/dev/da1 count=2
2+0 records in
2+0 records out
1024 bytes transferred in 0.003543 secs (289029 bytes/sec)
0.000u 0.002s 0:00.02 0.0%      0+0k 0+2io 0pf+0w
schwarzesonne# ls -alrt /dev/da1*
crw-r-----  1 root  operator  0x55 Oct 19 03:01 /dev/da1
crw-r-----  1 root  operator  0x62 Oct 19 03:01 /dev/da1s1
crw-r-----  1 root  operator  0x72 Oct 19 03:02 /dev/da1s1a
schwarzesonne# fdisk -vBI /dev/da1
******* Working on device /dev/da1 *******
fdisk: invalid fdisk partition table found
parameters extracted from in-core disklabel are:
cylinders=999 heads=64 sectors/track=32 (2048 blks/cyl)

parameters to be used for BIOS calculations are:
cylinders=999 heads=64 sectors/track=32 (2048 blks/cyl)

Information from DOS bootblock is:
1: sysid 165 (0xa5),(FreeBSD/NetBSD/386BSD)
    start 32, size 2045920 (998 Meg), flag 80 (active)
        beg: cyl 0/ head 1/ sector 1;
        end: cyl 998/ head 63/ sector 32
2: <UNUSED>
3: <UNUSED>
4: <UNUSED>
fdisk: Class not found
schwarzesonne# bsdlabel -w da1s1
schwarzesonne# time newfs -O 1 /dev/da1s1a
/dev/da1s1a: 999.0MB (2045904 sectors) block size 32768, fragment size 4096
        using 4 cylinder groups of 249.75MB, 7992 blks, 16128 inodes.
super-block backups (for fsck -b #) at:
 64, 511552, 1023040, 1534528
0.005u 0.015s 0:06.25 0.1%      128+15616k 6+260io 0pf+0w
schwarzesonne# mkdir /mnt/usb
schwarzesonne# mount -v /dev/da1s1a /mnt/usb/
/dev/da1s1a on /mnt (ufs, local, fsid 66279e4eff2fa382)

schwarzesonne# time dd if=/dev/zero bs=1m count=500 > /mnt/usb/500mb
500+0 records in
500+0 records out
524288000 bytes transferred in 106.844333 secs (4907027 bytes/sec)
0.007u 1.813s 1:46.85 1.6%      28+5603k 5+4006io 0pf+0w

: rebooted to flush caches and track read performance
schwarzesonne# reboot
schwarzesonne# mount /dev/da1s1a /mnt/usb
schwarzesonne# time cp /mnt/usb/500mb /root/.
0.000u 2.665s 0:44.18 6.0%      21+5364k 4007+4000io 0pf+0w

:: EHCI, 2gb stick, usb2 performance, same procedure, rebooted and used newfs
Oct 19 04:15:53 schwarzesonne kernel: da1 at umass-sim0 bus 0 scbus4 target 0 lun 0
Oct 19 04:15:53 schwarzesonne kernel: da1: <CBM Flash Disk 5.00> Removable Direct Access SCSI-2 device
Oct 19 04:15:53 schwarzesonne kernel: da1: 40.000MB/s transfers
Oct 19 04:15:53 schwarzesonne kernel: da1: 2024MB (4145664 512 byte sectors: 255H 63S/T 258C)
ugen2.2: <Flash Disk CBM> at usbus2, cfg=0 md=HOST spd=HIGH (480Mbps) pwr=ON

schwarzesonne# time newfs -O 1 /dev/da1s1a
/dev/da1s1a: 2023.8MB (4144688 sectors) block size 32768, fragment size 4096
        using 4 cylinder groups of 505.97MB, 16191 blks, 32512 inodes.
super-block backups (for fsck -b #) at:
 64, 1036288, 2072512, 3108736
0.027u 0.009s 0:08.75 0.2%      64+7808k 6+516io 0pf+0w
schwarzesonne# time dd if=/dev/zero bs=1m count=500 > /mnt/usb/500mb
500+0 records in
500+0 records out
524288000 bytes transferred in 173.849854 secs (3015752 bytes/sec)
0.008u 1.812s 2:53.85 1.0%      23+4694k 4+4005io 0pf+0w

:: EHCI, 2gb stick, usb2 performance, msdosfs FAT formatted under WindowsXP
schwarzesonne# mount -t msdosfs -o -m=644,-M=755 /dev/da1s1 /mnt/usb
schwarzesonne# time dd if=/dev/zero bs=1m count=500 > /mnt/usb/500mb
500+0 records in
500+0 records out
524288000 bytes transferred in 170.956245 secs (3066796 bytes/sec)
0.008u 1.787s 2:50.95 1.0%      24+4862k 0+8001io 0pf+0w

:: OHCI, 2gb stick, performance
schwarzesonne# time dd if=/dev/zero bs=1m count=500 > /mnt/usb/500mb
500+0 records in
500+0 records out
524288000 bytes transferred in 601.650968 secs (871416 bytes/sec)
0.000u 1.723s 10:01.65 0.2%     22+4325k 4+4005io 0pf+0w




>How-To-Repeat:

>Fix:


>Release-Note:
>Audit-Trail:
>Unformatted: