From: Jay Lepreau <lepreau@cs.utah.edu>
To: Fred Fierling <fff@microplex.com>
Cc: ecos-discuss@cygnus.com, oskit@fast.cs.utah.edu
Subject: Re: [ECOS] TCP/IP Stack for eCos
Date: Tue, 04 May 1999 13:51:00 -0000 [thread overview]
Message-ID: <199905042051.OAA16303@mancos.cs.utah.edu> (raw)
> It probably would take very little effort to get the OSKit's TCP/IP
> stack working in eCos, [...]
Do you know if it's a zero copy stack?
Yes, I believe it is but can't swear to it. It's FreeBSD's
implementation with our wrapping code and environment.
Aside:
In Sec 5 of the SOSP paper on our site there's a discussion of a
networking example (ttcp) which might be enlightening in a general
way. In that particular example an extra copy is incurred on the
outgoing path because BSD's scatter/gather `mbufs' in the protocol
component have to be copied into linear `skbuffs' in the (unchanged)
Linux driver component. That is an artifact of the mismatch and would
not apply if you allowed yourself to change the Linux drivers or
provided other drivers. (For maintenance and philosophical reasons,
we generally avoid changing foreign "encapsulated" code in the OSKit.)
next reply other threads:[~1999-05-04 13:51 UTC|newest]
Thread overview: 66+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <Fred>
[not found] ` <Fierling's>
[not found] ` <message>
[not found] ` <of>
[not found] ` <"Fri,>
[not found] ` <17>
[not found] ` <"Sat,>
[not found] ` <07>
[not found] ` <"Tue,>
[not found] ` <05>
[not found] ` <10>
[not found] ` <Jan>
[not found] ` <2001>
[not found] ` <Tue,>
[not found] ` <04>
[not found] ` <May>
[not found] ` <99>
[not found] ` <12:35:31>
[not found] ` <PDT>
1999-05-04 13:51 ` Jay Lepreau [this message]
1999-05-04 17:06 ` Fred Fierling
1999-05-04 17:43 ` Brendan Simon
1999-05-05 5:15 ` [ECOS] " Bart Veer
1999-05-05 1:54 ` [ECOS] " Fernando D. Mato Mira
[not found] ` <"Wed,>
[not found] ` <5>
[not found] ` <Jul>
[not found] ` <2000>
[not found] ` <11:39:46>
[not found] ` <+0200>
[not found] ` <"Mon,>
[not found] ` <09>
2000-07-05 2:40 ` [ECOS] Connecting gdb to AEB Andreas.Karlsson
2000-07-05 2:53 ` Jesper Skov
2000-07-05 3:12 ` Robert Erskine
2000-10-05 12:33 ` [ECOS] GDB Download on i386 target hangs Christian Plessl
2000-10-06 5:15 ` Nick Garnett
2000-10-07 0:55 ` Christian Plessl
2000-10-09 6:40 ` Nick Garnett
2000-10-09 12:50 ` Christian Plessl
2000-10-10 2:46 ` Nick Garnett
2000-10-10 3:49 ` Jesper Skov
[not found] ` <5.0.0.25.0.20001010121538.009f5e30@imap.ee.ethz.ch>
[not found] ` <wwg8zrwkiht.fsf@balti.cygnus>
2000-10-10 7:28 ` Christian Plessl
2000-10-10 7:58 ` Nick Garnett
2000-10-11 7:11 ` Christian Plessl
2000-10-11 7:20 ` Nick Garnett
2000-10-12 0:45 ` Jesper Skov
[not found] ` <11:11:19>
[not found] ` <+0100>
[not found] ` <Jesper>
2000-11-17 2:11 ` [ECOS] forwarded message from Peter Graf Jesper Skov
2000-11-19 23:43 ` Jesper Skov
2000-11-20 5:36 ` [ECOS] Hitachi SH7709A problems Peter Graf
2000-11-20 6:58 ` Jesper Skov
2000-11-20 7:20 ` Peter Graf
2001-01-03 2:48 ` Jesper Skov
2001-01-12 3:45 ` Peter Graf
[not found] ` <20:29:19>
[not found] ` <+0900>
2000-11-20 3:28 ` [ECOS] Help me !!, Hello world on out target °ÃÀç¿ë
2000-11-20 3:43 ` Jesper Skov
2000-11-20 5:54 ` Lewin A.R.W. Edwards
2000-11-20 6:43 ` Jesper Skov
2000-11-21 22:00 ` Jonathan Larmour
[not found] ` <09:24:40>
[not found] ` <-0500>
2000-12-05 6:26 ` [ECOS] gdb/insight questions Lewin A.R.W. Edwards
2000-12-05 7:22 ` Jesper Skov
2000-12-05 7:32 ` Lewin A.R.W. Edwards
2000-12-05 20:15 ` Jonathan Larmour
2000-12-06 4:13 ` Lewin A.R.W. Edwards
2000-12-05 22:43 ` Natarajan, Mekala (CTS)
2000-12-06 1:42 ` Jesper Skov
2000-12-06 4:47 ` Lewin A.R.W. Edwards
2001-01-10 16:42 [ECOS] Really dumb newbie question Tim Noell
2001-01-10 17:48 ` Lewin A.R.W. Edwards
2001-01-10 23:58 ` Jesper Skov
2001-01-11 6:05 ` Lewin A.R.W. Edwards
2001-01-11 7:26 ` Gary Thomas
2001-01-11 7:41 ` Grant Edwards
2001-01-11 7:51 ` Julian Smart
2001-01-11 8:01 ` Grant Edwards
2001-01-11 7:56 ` Gary Thomas
2001-01-11 8:36 ` Sergei Organov
-- strict thread matches above, loose matches on Subject: below --
1999-09-28 22:04 [ECOS] TCP/IP Stack for eCos Prakash R
1999-09-23 15:44 [ECOS] TCP/IP Stack for ECOS Ramana
1999-09-24 9:08 ` Jonathan Larmour
1999-05-04 4:36 [ECOS] TCP/IP Stack for eCos Jay Lepreau
1999-05-04 12:36 ` Fred Fierling
1999-04-28 1:14 Fernando D. Mato Mira
1999-04-27 17:55 Kenneth Porter
1999-04-26 7:04 Leonard, Niall
1999-04-23 10:20 Fred Fierling
1999-04-23 12:10 ` Bob Cousins
1999-04-23 13:27 ` Fred Fierling
1999-04-23 16:08 ` Bob Cousins
1999-04-23 17:56 ` Frank W. Miller
1999-04-26 7:02 ` Bart Veer
1999-04-27 6:01 ` Fernando D. Mato Mira
1999-04-27 11:08 ` Fred Fierling
[not found] <Christian>
[not found] <Natarajan,>
[not found] <Lewin>
[not found] ` <A.R.W.>
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