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Unknown
*nix forums beginner
Joined: 26 Mar 2004
Posts: 42
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 Posted: Fri May 06, 2005 2:02 am Post subject:
Re: ramdisk question...Please respond. Thanks
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On Thu, 05 May 2005 19:06:20 -0400, Uday wrote:
| Quote: | Hi,
I am a newbie to linux .
I am using x86 architecture with 1GB ram.
when i compile the kernel, i get this bvmlinux.out executable.
My requirement is that i need to boot my board with ramdisk. so this is what
i did,
I have loaded the bvmlinix.out at 0x100000 and ramdisk at 0x20000000.
I have modified the kernel code to hardcode the address of the ramdisk to
the kernel. Then i ask BIOS to jump to location 0x100000.
{ Note that i am not using any bootloader and the BIOS switch the processor
to protected mode and has some more instructions(not sure what they are)
before it jumps to the kernel}
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Please explain
1) What the hell is bvmlinux.out file - is this is a standard kernel, you
might do better to fill in the missing links with the reader if not !
2) Whats the hardware ?
3) Why the modifications to the load address - if its a 386 or above then
the virtual mapping is likely to get it right without any mods.
4) init=/bin/bash is safer as /bin/sh is a symlink in most systems
5) Have you done mkinitrd - Is the initrd file present, compressed
correctly ? 5) Most standard PC BIOS jump to the loader (kernel in this
case) in 'real mode'
Jon |
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jedi
*nix forums beginner
Joined: 12 Mar 2005
Posts: 10
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| Posted: Sat Jun 04, 2005 12:10 pm Post subject:
Re: uclinux dhcpcd can not update resolv.conf
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enst wrote:
| Quote: | how to change /etc from romfs to ramdisk
so that, dhcpcd can update DSN server in resolv
now, /etc is in romfs, it is readonly
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Create a link from /etc to let's say /var/etc
which is normally mounted as ramdisk
rick |
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enst
*nix forums beginner
Joined: 05 Jun 2005
Posts: 2
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| Posted: Sun Jun 05, 2005 10:20 am Post subject:
Re: uclinux dhcpcd can not update resolv.conf
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i use the command
ln -s /etc /var/etc
after that
/var/etc become readonly too.
i can not change anything in /var/etc.
On Sat, 04 Jun 2005 14:10:14 GMT, Jedi <me@aol.com> wrote:
| Quote: | enst wrote:
how to change /etc from romfs to ramdisk
so that, dhcpcd can update DSN server in resolv
now, /etc is in romfs, it is readonly
Create a link from /etc to let's say /var/etc
which is normally mounted as ramdisk
rick |
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Wolfgang Mües
*nix forums beginner
Joined: 31 Mar 2005
Posts: 9
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| Posted: Sun Jun 05, 2005 5:00 pm Post subject:
Re: uclinux dhcpcd can not update resolv.conf
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enst wrote:
| Quote: | i use the command
ln -s /etc /var/etc
after that
/var/etc become readonly too.
i can not change anything in /var/etc.
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try ln -s /var/etc /etc
best regards
Wolfgang |
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Guest
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| Posted: Wed Jun 08, 2005 2:58 am Post subject:
Re: problem about CPU load testing on PPC750
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OpenSS7 modified the HP netperf tool to work with the Linux Native
Sockets SCTP. Also, we have a new release (not quite yet available
for download) of Linux Native SCTP that installs on a kernel without
patching it. Also soon to be released is the netperf tool that does
CPU load testing as well.
--brian
kevin <kthkevin@gmail.com> wrote:
| Quote: | Hi all:
I have added OpenSS7 SCTP patches to MontaVista Linux(based on 2.4.20),
and run the kernel on PPC750 with a Root File Systemon a PC with SuSE
9. And I use iperf(a TCP,SCTP/UDP traffic generator) to test the
bindwidth of the SCTP traffic.
And now, I want to test the CPU load of the traffic, due to some
reason, I need to find a test tool based on counter-based algorithm to
calculate the CPU load of process.(not the timer-based one)
I found oprofile is nice one, but it doesnt support 2.4 kernel.
I found top is easy to use, but it seems based on timer-based.
So, anyone who can help me or give me some ideas?
Thanks!
Kev
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--
Brian F. G. Bidulock
bidulock@openss7.org
http://www.openss7.org/
--
Brian F. G. Bidulock
bidulock@openss7.org
http://www.openss7.org/ |
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kevin
*nix forums beginner
Joined: 07 May 2005
Posts: 25
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| Posted: Sat Jun 11, 2005 6:35 pm Post subject:
Re: problem about CPU load testing on PPC750
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Hi Brian:
When you can release the NEW netperf tool for PowerPC?
And now, I test the CPU load the SCTP stack when there is traffic load
by
analysing the information in /proc with command "top", and I hope I can
use some tool to make it.
Kev |
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Guest
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| Posted: Sun Jun 12, 2005 10:12 am Post subject:
Re: problem about CPU load testing on PPC750
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It is next on my todo list.
--brian
kevin <kthkevin@gmail.com> wrote:
| Quote: | Hi Brian:
When you can release the NEW netperf tool for PowerPC?
And now, I test the CPU load the SCTP stack when there is traffic load
by
analysing the information in /proc with command "top", and I hope I can
use some tool to make it.
Kev
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--
Brian F. G. Bidulock
bidulock@openss7.org
http://www.openss7.org/ |
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Rick Jones
*nix forums Guru
Joined: 24 Feb 2005
Posts: 492
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| Posted: Mon Jun 13, 2005 9:58 pm Post subject:
Re: problem about CPU load testing on PPC750
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bidulock@openss7.org wrote:
| Quote: | OpenSS7 modified the HP netperf tool to work with the Linux Native
Sockets SCTP. Also, we have a new release (not quite yet available
for download) of Linux Native SCTP that installs on a kernel without
patching it. Also soon to be released is the netperf tool that does
CPU load testing as well.
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Are these changes to 2.4.0 (which has the sctp library version of SCTP
support already) or something older?
I'm particularly curious to hear more about the CPU load testing as
CPU utilization measurement in netperf is always a "fun" area.
rick "mr netperf" jones
--
The computing industry isn't as much a game of "Follow The Leader" as
it is one of "Ring Around the Rosy" or perhaps "Duck Duck Goose."
- Rick Jones
these opinions are mine, all mine; HP might not want them anyway... 
feel free to post, OR email to rick.jones2 in hp.com but NOT BOTH... |
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Guest
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| Posted: Tue Jun 14, 2005 7:05 pm Post subject:
Re: problem about CPU load testing on PPC750
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Rick Jones <rick.jones2@hp.com> wrote:
| Quote: | bidulock@openss7.org wrote:
OpenSS7 modified the HP netperf tool to work with the Linux Native
Sockets SCTP. Also, we have a new release (not quite yet available
for download) of Linux Native SCTP that installs on a kernel without
patching it. Also soon to be released is the netperf tool that does
CPU load testing as well.
Are these changes to 2.4.0 (which has the sctp library version of SCTP
support already) or something older?
I'm particularly curious to hear more about the CPU load testing as
CPU utilization measurement in netperf is always a "fun" area.
rick "mr netperf" jones
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Modifications were made on netperf 2.3 release. Modifications were made
not only for "sockets" (our Linux Native Sockets version of SCTP) but were
also made for STREAMS (our STREAMS version of SCTP). I didn't know there
was a 2.4.0 release, I'll endeavour to port forward the modifications.
--brian
--
Brian F. G. Bidulock
bidulock@openss7.org
http://www.openss7.org/ |
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T Marchini
*nix forums beginner
Joined: 07 Jun 2005
Posts: 5
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| Posted: Sun Jun 19, 2005 12:42 pm Post subject:
Re: Where to start?
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Tolga Onbay wrote:
| Quote: | Hi,
I'm so interested in Operating Systems and Embedded Systems. I have
basic knowledge about both of them. But I want to go deeper. I asked
before same questions. But the answer was not enough. Let's start from
beginning.
I have made some experiment on Microchip's PIC like light LEDs. Which
Microcontroller is the most used or which is good to start? My
target(or dream) is to port linux to my embedded device. (I know it is
difficult for me to make this now. But I said it is a dream  )
I have planned to work on this in all summer. So there is so much free
time to search, read books & documents. Can you advice some books and
web sites?
Thanks...
There are many to choose from. I would suggest www.embeddedarm.com and |
their little product (the TS-7200). Unless you have to ship it overseas
and then I don't know what to tell you.
There are several linux hacks out there using off the shelf equipment
from Linksys and such like the NSLU2. A lot of work has been done with
it. I think there is a lot done with the linksys WRT54G as well.
You can't put Linux on a PIC, but you can make a lot of very usefull
interfaces using a linux target and a PIC front end. The pic handling
the fast events and spoonfeeding them to the linux machine in "near"
real time.
Embedding linux is a matter of getting it to run on a certain smallish
target with minimal resources (not a lot of memory). Another operating
system platform to try this with would be NetBSD.
There are some toys and topics.
T. |
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quitschn
*nix forums beginner
Joined: 07 Jun 2005
Posts: 4
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| Posted: Thu Jun 23, 2005 4:19 am Post subject:
Re: pci driver 2.4-> 2.6
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Kakrocq wrote:
| Quote: | Hello,
I have a good pci driver (linux 2.4 +rtai ) (i use the book from Alessandro
Rubini but only driver with linux 2.4 are explained)
I want change to linux 2.6 but the Makefile don't work at all .
How can I do modification for this ?
Hi, |
AFAIK kernel modules using 2.6.x are named *.ko. So the file name ending
*.o has changed to *.ko.
Furthermore a file of the kernel tree is linked to your module using 2.6.x
You can find detailed information on device drivers using 2.6.x at:
http://linuxdevices.com/articles/AT4389927951.html
At the end of the article you can find the following headline:
"Changes to the Build Process for Modules"
Hope this will help.
Kind regards
Quitschn |
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Robert Kaiser
*nix forums beginner
Joined: 22 Feb 2005
Posts: 34
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| Posted: Wed Jul 06, 2005 11:26 am Post subject:
Re: Selecting the OS for DO-178B
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In article <1120587008.795603.206890@g14g2000cwa.googlegroups.com>,
meyerovichl@saic.com writes:
| Quote: | We are starting our project from scratch and can select virtually any
OS that provides support to DO-178B. Is anybody can compare the main
players on DO-178B RTOS market?
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Why would you post this in c.o.l.e? Linux isnt a realistic choice if you go
for anything higher than Level D.
Rob
--
Robert Kaiser email: rkaiser AT sysgo DOT com
SYSGO AG http://www.pikeos.com
Klein-Winternheim / Germany http://www.sysgo.com |
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Mouarf
*nix forums beginner
Joined: 11 Jul 2005
Posts: 10
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| Posted: Mon Jul 11, 2005 8:16 am Post subject:
Re: PC104 PCB's for Sale
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no PC104 board for sell at the moment??!!??
"Joseph P. Phaturos" <ka3fur1@comcast.net> schrieb im Newsbeitrag
news:G_udnYUM2tcURlPfRVn-2w@comcast.com...
| Quote: | Hi.
Anyone in need of PC104 boards, go to ebay.com and find seller dxer114
auction items.
That is my selling name on ebay.
PC/104 is a standard for PC-compatible modules (circuit boards) that can
be stacked together to create an embedded computer system. These types of
systems are often found in factories, laboratories, and machinery to
provide programmable control of a complex system.
PC/104 systems are very similar to standard desktop PCs but with a
different form factor. The name "PC/104" is derived from this likeness and
the special stackable bus connector having 104 pins. These systems can be
programmed with the same development tools used with full-size PCs which
reduces the need and cost of custom development efforts. Although only
about 4" x 4", PC/104 boards are very powerful for their size. PC/104
products are designed for minimal power consumption, small foot print,
modularity, expandability, and ruggedness - basic needs of the embedded
systems designer.
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Grant Edwards
*nix forums Guru
Joined: 21 Feb 2005
Posts: 1227
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| Posted: Mon Jul 18, 2005 4:37 pm Post subject:
Re: Where to get cheap embedded system
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On 2005-07-18, Luc The Perverse <sll_noSpamlicious_z_XXX_m@cc.usu.edu> wrote:
| Quote: | I'd like to build software for an embedded system. I am considering =
using an I-pod (or similar) device or possibly a printer, because these =
have native drive options, and some printers have networks already built =
in. Anyone else have any better ideas. I could always hack an X-Box =
I suppose, but I'd like to go even cheaper than that.
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Many of the wireless hubs and cheap firewalls run Linux.
The Linksys WRTG54 is one that springs to mind. I think most
of the Netgear boxes run Linux as well.
You might want to take a look at www.linuxdevices.com
| Quote: | first-rate product, it's never an ideal choice. " -Ed (<A=20
href=3D"http://www.overclockers.com">www.overclockers.com</A>)</FONT></DI=
V></BODY></HTML
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Lose that HTML crap, please.
--
Grant Edwards grante Yow! Why am I in this ROOM
at in DOWNTOWN PHILADELPHIA?
visi.com |
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Anton Erasmus
*nix forums beginner
Joined: 23 Mar 2005
Posts: 27
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| Posted: Tue Jul 19, 2005 3:33 pm Post subject:
Re: Where to get cheap embedded system
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On Mon, 18 Jul 2005 18:37:43 -0000, Grant Edwards <grante@visi.com>
wrote:
| Quote: | On 2005-07-18, Luc The Perverse <sll_noSpamlicious_z_XXX_m@cc.usu.edu> wrote:
I'd like to build software for an embedded system. I am considering =
using an I-pod (or similar) device or possibly a printer, because these =
have native drive options, and some printers have networks already built =
in. Anyone else have any better ideas. I could always hack an X-Box =
I suppose, but I'd like to go even cheaper than that.
Many of the wireless hubs and cheap firewalls run Linux.
The Linksys WRTG54 is one that springs to mind. I think most
of the Netgear boxes run Linux as well.
You might want to take a look at www.linuxdevices.com
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Many of the Gigabyte wireless hubs and firewalls runs Linux as well.
They have the full source for these devices available on their web
site.
Regards
Anton Erasmus |
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