On Wed, Jun 10, 2009 at 6:54 PM, Donald Allen <donaldcal...@gmail.com>wrote:
> > > On Wed, Jun 10, 2009 at 5:21 PM, Thomas Pfaff <tpf...@tp76.info> wrote: > >> On Sun, 7 Jun 2009 15:58:56 +0200 >> Thomas Pfaff <tpf...@tp76.info> wrote: >> >> > Getting really slow performance on umass(4) devices. It takes about >> > 20 minutes to write 1.4G, while the same job takes about 2.5 minutes >> > on Ubuntu and Windows (on the same hardware). >> > >> > The device attaches to an EHCI hub but, with regards to performance, >> > it acts like it's attached to an UHCI hub. Please see script below. >> >> Is anyone else experiencing this? Is the problem on my side, or does >> OpenBSD not yet support High Speed USB transfers? > > > umass0 at uhub8 port 6 configuration 1 interface 0 "Sunplus Technology Inc. > USB to Serial-ATA bridge" rev 2.00/c6.83 addr 7 > umass0: using SCSI over Bulk-Only > scsibus2 at umass0: 2 targets, initiator 0 > sd1 at scsibus2 targ 1 lun 0: <ST332062, 0NS, > SCSI2 0/direct fixed > sd1: 305245MB, 512 bytes/sec, 625142448 sec total > umass1 at uhub8 port 5 configuration 1 interface 0 "Sunplus Technology Inc. > USB to Serial-ATA bridge" rev 2.00/c6.83 addr 8 > umass1: using SCSI over Bulk-Only > scsibus3 at umass1: 2 targets, initiator 0 > sd2 at scsibus3 targ 1 lun 0: <ST332062, 0NS, > SCSI2 0/direct fixed > sd2: 305245MB, 512 bytes/sec, 625142448 sec total > > sd1 and sd2 are both Seagate 300 Gb 7200 rpm sata drives in usb shoeboxes. > > sd1a is an ffs filesystem mounted on ~/Backups/Primary, no soft updates, no > noatime. > sd2i is an ext2 filesystem mounted on ~/Backups/Secondary, no noatime. > > So, after Aaron's dd experiment, I got filesystems involved: > > d...@sophie:~/Backups$ time (cp ~/temp/usr-bare-metal.tar.bz2 > ~/Backups/Primary ; sync) > > real 1m2.535s > user 0m0.010s > sys 0m2.430s > > d...@sophie:~/Backups$ time (cp ~/temp/usr-bare-metal.tar.bz2 > ~/Backups/Secondary ; sync) > > real 2m30.944s > user 0m0.000s > sys 0m3.200s > > -rw-r--r-- 1 dca allen 771M Jun 10 18:19 usr-bare-metal.tar.bz2 > > So this is an order-of-magnitude faster than what you are seeing. > > It's also interesting that writing to the ffs filesystem is more than twice > as fast as writing to the ext2 filesystem, especially given that I've got > the ffs filesystem mounted fully synchronous. > I'm sorry -- I forgot to mention that this is running on a Thinkpad X61, 2 Gb memory, 100 Gb 7200 rpm internal drive, OpenBSD 4.5 (amd64). The processor is Core 2 Duo, ~ 2 Ghz. ~/temp lives on the internal drive. /Don
