usb/161793: poor EHCI usb2 i/o performance
Alexander Best
arundel at freebsd.org
Wed Oct 19 18:28:39 UTC 2011
On Wed Oct 19 11, Hans Petter Selasky wrote:
> The following reply was made to PR usb/161793; it has been noted by GNATS.
>
> From: Hans Petter Selasky <hselasky at c2i.net>
> To: freebsd-usb at freebsd.org
> Cc: Chargen <chargen at gmail.com>,
> freebsd-gnats-submit at freebsd.org
> Subject: Re: usb/161793: poor EHCI usb2 i/o performance
> Date: Wed, 19 Oct 2011 07:55:50 +0200
>
> Hello,
>
> When testing and formatting, it is important to set the block size to 65536
> bytes to get the maximum performance. The default blocksize of "dd" is 512
> bytes, and there is no read-ahead! Try again using:
>
> dd if=/dev/daX of=/dev/null bs=65536.
results here are:
otaku% dd if=/dev/da0 of=/dev/null bs=65536
30495+1 records in
30495+1 records out
1998585344 bytes transferred in 159.388494 secs (12539082 bytes/sec)
otaku% dd if=/dev/da0 of=/dev/null bs=65536
238033+1 records in
238033+1 records out
15599771136 bytes transferred in 655.616437 secs (23794051 bytes/sec)
testing an old usb stick and a fairly recent one. that's with usb2 and running
HEAD. the results are incredible imo.
my usb controller is
<Intel 82801I (ICH9) USB 2.0 controller>
cheers.
alex
>
> Thank you,
>
> --HPS
>
> On Wednesday 19 October 2011 05:41:16 Chargen wrote:
> > >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:
> > _______________________________________________
> > freebsd-usb at freebsd.org mailing list
> > http://lists.freebsd.org/mailman/listinfo/freebsd-usb
> > To unsubscribe, send any mail to "freebsd-usb-unsubscribe at freebsd.org"
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