Subject: Re: Very slow pipe/TCP connection in 1.6_BETA4
To: Andreas Wrede <email@example.com>
From: Manuel Bouyer <firstname.lastname@example.org>
Date: 07/15/2002 21:25:48
On Tue, Jul 09, 2002 at 01:49:50PM -0400, Andreas Wrede wrote:
> On Tue, 9 Jul 2002, Bang Jun-Young wrote:
> > On Mon, Jul 08, 2002 at 11:02:41AM -0400, Andreas Wrede wrote:
> > > Does anyone have an idea what is holding things up here?
> > Why don't you give it a try again with having `options PIPE_SOCKETPAIR'
> > enabled in your kernel config file?
> No change, as reported earlier.
> I worked around the problem by dumping the tape to a disk partition
> and used dd | gzip -d | restore, with expected performance. This seams
> to indicate some complex timing interdependencies bewteem scsi, pipe
> and TCP stack.
> BTW, the tape drive involved is a Exabyte 8505 attached to a 53c875
> with the esiop driver.
> Does anyone else have problems with amrecover performance in
See kern/17421. I didn't go as far as you, I just though the socket was
I'm using a DLT drive connected to an adaptec SCSI adapter. So it doesn't
seem to be dependant on hardware.
Manuel Bouyer <email@example.com>