I've ran out of ideas
aaron.glenn at gmail.com
Thu Nov 18 09:22:42 PST 2004
d# dd if=/dev/ad2s1 of=/dev/null bs=64k count=1000
1000+0 records in
1000+0 records out
65536000 bytes transferred in 1.353203 secs (48430278 bytes/sec)
iostat has never gone above 3.8MB/s
On Thu, 18 Nov 2004 02:55:43 -0800 (PST), Arne Wörner
<arne_woerner at yahoo.com> wrote:
> > > I'm pushing large files via thttpd over low-end
> > > hardware (celeron
> > > 1.8GHz, 512MB RAM, UATA 100 drive) and, out of the
> > > box, FreeBSD
> > > 5.3-RELEASE topped out at 40Mbps sustained. After
> > > creating a separate
> > > partition with a much larger blocksize, it's hit
> > > 50Mbps sustained but
> > > won't go past 54Mbps at all.
> > You could try adding/tweaking HZ to 1000/2000 in
> > kernel and add kern.polling.enable=1 to
> > /etc/sysctl.conf.
> Here I would like to mention the man page polling(4) for clarification (it does
> not look like the GENERIC kernel can do polling...).
> Furthermore I would like to know, how fast is a "dd if=/dev/discXY of=/dev/null
> bs=64k count=1000" in single user mode on your box (I can do 42.8MByte/sec with
> UDMA-100 and ST340015A (Seagate?))...
> Do you Yahoo!?
> The all-new My Yahoo! - Get yours free!
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