linuxppc-2.4.30-pre1 crashes with root fs on Xilinx SystemACE

linuxppc-2.4.30-pre1 crashes with root fs on Xilinx SystemACE

[Keith J Outwater]

Hello - 
Per a previous suggestion from this list, I rsynced the linuxppc-2.4 
kernel sources from MontaVista and modified the kernel to run on my custom 
ppc405/VirtexII Pro based system with U-Boot as the bootloader.
When I try to use the SystemACE device as the root filesystem, the kernel 
crashes with a sig 11.  Looking at the 'oops' output it appears  the 
SystemACE driver may be to blame.  The crash is random - sometimes I get 
all the way to login as root and then things crash on a file copy or a 
file read.
Before I start digging deeper, is anyone running a VirtexIIPro based 
system with the root filesystem in the CF card attached to a SystemACE? 
I'm wondering if I really have the best kernel and SystemACE driver.
BTW, I'm developing the hardware design using Xilinx EDK 7.02i.
Thanks,
Keith

Re: linuxppc-2.4.30-pre1 crashes with root fs on Xilinx SystemACE

[Peter Ryser]

Hi Keith,

I sent you a private email but for other interested people:
Downloading the latest linuxppc-2.4 kernel I could boot from and access 
System ACE CF without problems on a ML403 (Virtex-4, 4VFX12) and a ML310 
(Virtex-II Pro, 2VP30) using EDK 7.1.2. In both cases I started with 
config_xilinx_ml300.

- Peter



Keith J Outwater wrote:

>Hello - 
>Per a previous suggestion from this list, I rsynced the linuxppc-2.4 
>kernel sources from MontaVista and modified the kernel to run on my custom 
>ppc405/VirtexII Pro based system with U-Boot as the bootloader.
>When I try to use the SystemACE device as the root filesystem, the kernel 
>crashes with a sig 11.  Looking at the 'oops' output it appears  the 
>SystemACE driver may be to blame.  The crash is random - sometimes I get 
>all the way to login as root and then things crash on a file copy or a 
>file read.
>Before I start digging deeper, is anyone running a VirtexIIPro based 
>system with the root filesystem in the CF card attached to a SystemACE? 
>I'm wondering if I really have the best kernel and SystemACE driver.
>BTW, I'm developing the hardware design using Xilinx EDK 7.02i.
>Thanks,
>Keith
>_______________________________________________
>Linuxppc-embedded mailing list
>Linuxppc-embedded@ozlabs.org
>https://ozlabs.org/mailman/listinfo/linuxppc-embedded
>
>
>  
>

Re: linuxppc-2.4.30-pre1 crashes with root fs on Xilinx SystemACE

[Tony Lee]

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Keith, 

Some suggestions, before you verify your hw board/FPGA works fine with 
SYSACE, 
* don't use sysace as root fs.
* use a ram fs as root fs. 
* Next, load sysace driver a loadable driver module. It works, I tried it.
* check mount read only and see if it works.
* Next, mount it writable.

We have some issues with sysace driver initially, everything works out fine 
later.
There were small errors in our HW layout.

I had to hack the sysace driver left and right to id the problem. But at the 

end, after I fixed the layout problem from the fpga's ucf file, the original 
driver
run perfectly without any modification.

In my experiences, the ppc linux distribution and its linux sysace driver 
are good
if everything is setup correctly.

One minor issues: The sysace driver's write performance sucks. I have to 
explain
to others why the upgrade 10 MBytes files with usb flash writer takes tens 
of 
seconds. When we do it from linux (nfs or ftp), it tooks minutes to sync.

Peter, maybe you can push the xilinx a bit on sysace write performance? :-)

-Tony

On 8/29/05, Peter Ryser <peter.ryser@xilinx.com> wrote:
> 
> Hi Keith,
> 
> I sent you a private email but for other interested people:
> Downloading the latest linuxppc-2.4 kernel I could boot from and access
> System ACE CF without problems on a ML403 (Virtex-4, 4VFX12) and a ML310
> (Virtex-II Pro, 2VP30) using EDK 7.1.2. In both cases I started with
> config_xilinx_ml300.
> 
> - Peter
> 
> 
> 
> Keith J Outwater wrote:
> 
> >Hello -
> >Per a previous suggestion from this list, I rsynced the linuxppc-2.4
> >kernel sources from MontaVista and modified the kernel to run on my 
> custom
> >ppc405/VirtexII Pro based system with U-Boot as the bootloader.
> >When I try to use the SystemACE device as the root filesystem, the kernel
> >crashes with a sig 11. Looking at the 'oops' output it appears the
> >SystemACE driver may be to blame. The crash is random - sometimes I get
> >all the way to login as root and then things crash on a file copy or a
> >file read.
> >Before I start digging deeper, is anyone running a VirtexIIPro based
> >system with the root filesystem in the CF card attached to a SystemACE?
> >I'm wondering if I really have the best kernel and SystemACE driver.
> >BTW, I'm developing the hardware design using Xilinx EDK 7.02i.
> >Thanks,
> >Keith
> >_______________________________________________
> >Linuxppc-embedded mailing list
> >Linuxppc-embedded@ozlabs.org
> >https://ozlabs.org/mailman/listinfo/linuxppc-embedded
> >
> >
> >
> >
> 
> 
> 
> _______________________________________________
> Linuxppc-embedded mailing list
> Linuxppc-embedded@ozlabs.org
> https://ozlabs.org/mailman/listinfo/linuxppc-embedded
> 



-- 
-Tony
Having fun with FPGA HW + ppc + Linux

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Re: linuxppc-2.4.30-pre1 crashes with root fs on Xilinx SystemACE

[Peter Ryser]

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Some time ago we did some tests with bonnie++ on Linux running on the 
PPC405 in a Virtex-II Pro FPGA. You can expect the following performance:

Read peak: 629 KB/s
Write peak: 299 KB/s

Not considering network overhead, a 10MB file should take less than a 
minute to update.

- Peter


Tony Lee wrote:

> Keith, 
>
> Some suggestions, before you verify your hw board/FPGA works fine with 
> SYSACE,
>     * don't use sysace as root fs.
>     * use a ram fs as root fs.  
>     * Next, load sysace driver a loadable driver module.  It works, I 
> tried it.
>     * check mount read only and see if it works.
>     * Next, mount it writable.
>
> We have some issues with sysace driver initially, everything works out 
> fine later.
> There were small errors in our HW layout.
>
> I had to hack the sysace driver left and right to id the problem.  But 
> at the
> end, after I fixed the layout problem from the fpga's ucf file, the 
> original driver
> run perfectly without any modification.
>
> In my experiences, the ppc linux distribution and its linux sysace 
> driver are good
> if everything is setup correctly.
>
> One minor issues:  The sysace driver's write performance sucks.  I 
> have to explain
> to others why the upgrade 10 MBytes files with usb flash writer takes 
> tens of
> seconds.  When we do it from linux (nfs or ftp), it tooks minutes to sync.
>
> Peter, maybe you can push the xilinx a bit on sysace write 
> performance? :-)
>
> -Tony
>
> On 8/29/05, Peter Ryser <peter.ryser@xilinx.com 
> <mailto:peter.ryser@xilinx.com>> wrote:
>
>     Hi Keith,
>
>     I sent you a private email but for other interested people:
>     Downloading the latest linuxppc-2.4 kernel I could boot from and
>     access
>     System ACE CF without problems on a ML403 (Virtex-4, 4VFX12) and a
>     ML310
>     (Virtex-II Pro, 2VP30) using EDK 7.1.2. In both cases I started with
>     config_xilinx_ml300.
>
>     - Peter
>
>
>
>     Keith J Outwater wrote:
>
>     >Hello -
>     >Per a previous suggestion from this list, I rsynced the linuxppc-2.4
>     >kernel sources from MontaVista and modified the kernel to run on
>     my custom
>     >ppc405/VirtexII Pro based system with U-Boot as the bootloader.
>     >When I try to use the SystemACE device as the root filesystem,
>     the kernel
>     >crashes with a sig 11.  Looking at the 'oops' output it appears  the
>     >SystemACE driver may be to blame.  The crash is random -
>     sometimes I get
>     >all the way to login as root and then things crash on a file copy
>     or a
>     >file read.
>     >Before I start digging deeper, is anyone running a VirtexIIPro based
>     >system with the root filesystem in the CF card attached to a
>     SystemACE?
>     >I'm wondering if I really have the best kernel and SystemACE driver.
>     >BTW, I'm developing the hardware design using Xilinx EDK 7.02i.
>     >Thanks,
>     >Keith
>     >_______________________________________________
>     >Linuxppc-embedded mailing list
>     > Linuxppc-embedded@ozlabs.org <mailto:Linuxppc-embedded@ozlabs.org>
>     >https://ozlabs.org/mailman/listinfo/linuxppc-embedded
>     >
>     >
>     >
>     >
>
>
>
>     _______________________________________________
>     Linuxppc-embedded mailing list
>     Linuxppc-embedded@ozlabs.org <mailto:Linuxppc-embedded@ozlabs.org>
>     https://ozlabs.org/mailman/listinfo/linuxppc-embedded
>     <https://ozlabs.org/mailman/listinfo/linuxppc-embedded>
>
>
>
>
> -- 
> -Tony
> Having fun with FPGA HW + ppc + Linux


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Re: linuxppc-2.4.30-pre1 crashes with root fs on Xilinx SystemACE

[Keith J Outwater]

Peter - 
That's about the throughput I saw on my system.  It's pretty slow!

Tony - 
I did get things working by applying a "sysace nointr" patch that had been 
posted to the list some
time ago in response to comments that SystemACE interrupts were not 
working as expected on
Memec boards.  I did my initial development on a Memec board and had lots 
of problems until
I disabled SystemACE interrupts.  Some day I may actually go back and try 
to figure out
what is going on, but for the time being, I can live with what I have.


Peter Ryser <peter.ryser@xilinx.com> wrote on 09/28/2005 02:32:11 AM:

> Some time ago we did some tests with bonnie++ on Linux running on 
> the PPC405 in a Virtex-II Pro FPGA. You can expect the following 
performance:
> Read peak: 629 KB/s
> Write peak: 299 KB/s
> Not considering network overhead, a 10MB file should take less than 
> a minute to update.
> 
> - Peter
> 
> 
> Tony Lee wrote:
> Keith, 
> 
> Some suggestions, before you verify your hw board/FPGA works fine 
> with SYSACE, 
>     * don't use sysace as root fs.
>     * use a ram fs as root fs. 
>     * Next, load sysace driver a loadable driver module.  It works, 
> I tried it.
>     * check mount read only and see if it works.
>     * Next, mount it writable.
> 
> We have some issues with sysace driver initially, everything works 
> out fine later.
> There were small errors in our HW layout.
> 
> I had to hack the sysace driver left and right to id the problem.  But 
at the 
> end, after I fixed the layout problem from the fpga's ucf file, the 
> original driver
> run perfectly without any modification.
> 
> In my experiences, the ppc linux distribution and its linux sysace 
> driver are good
> if everything is setup correctly.
> 
> One minor issues:  The sysace driver's write performance sucks.  I 
> have to explain
> to others why the upgrade 10 MBytes files with usb flash writer takes 
tens of 
> seconds.  When we do it from linux (nfs or ftp), it tooks minutes to 
sync.
> 
> Peter, maybe you can push the xilinx a bit on sysace write performance? 
:-)
> 
> -Tony

> On 8/29/05, Peter Ryser <peter.ryser@xilinx.com> wrote: 
> Hi Keith,
> 
> I sent you a private email but for other interested people:
> Downloading the latest linuxppc-2.4 kernel I could boot from and access
> System ACE CF without problems on a ML403 (Virtex-4, 4VFX12) and a ML310 

> (Virtex-II Pro, 2VP30) using EDK 7.1.2. In both cases I started with
> config_xilinx_ml300.
> 
> - Peter
> 
> 
> 
> Keith J Outwater wrote:
> 
> >Hello -
> >Per a previous suggestion from this list, I rsynced the linuxppc-2.4
> >kernel sources from MontaVista and modified the kernel to run on my 
custom
> >ppc405/VirtexII Pro based system with U-Boot as the bootloader.
> >When I try to use the SystemACE device as the root filesystem, the 
kernel 
> >crashes with a sig 11.  Looking at the 'oops' output it appears  the
> >SystemACE driver may be to blame.  The crash is random - sometimes I 
get
> >all the way to login as root and then things crash on a file copy or a 
> >file read.
> >Before I start digging deeper, is anyone running a VirtexIIPro based
> >system with the root filesystem in the CF card attached to a SystemACE?
> >I'm wondering if I really have the best kernel and SystemACE driver. 
> >BTW, I'm developing the hardware design using Xilinx EDK 7.02i.
> >Thanks,
> >Keith
> >_______________________________________________
> >Linuxppc-embedded mailing list
> > Linuxppc-embedded@ozlabs.org
> >https://ozlabs.org/mailman/listinfo/linuxppc-embedded
> >
> >
> >
> >
> 
> 
> 
> _______________________________________________ 
> Linuxppc-embedded mailing list
> Linuxppc-embedded@ozlabs.org
> https://ozlabs.org/mailman/listinfo/linuxppc-embedded 
> 
> 
> 
> -- 
> -Tony
> Having fun with FPGA HW + ppc + Linux