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Re: [microblaze-uclinux] Re: [microblaze-uclinux] UDP packet reception triggers a hangup on the microblaze

To: microblaze-uclinux@xxxxxxxxxxxxxx
Subject: Re: [microblaze-uclinux] Re: [microblaze-uclinux] UDP packet reception triggers a hangup on the microblaze
From: "Bas van Tiel" <bvantiel@xxxxxxxxx>
Date: Wed, 3 Dec 2008 15:07:16 +0100
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Hi Michal,

these are the results with the EMACLite and the ML506 on edk9.2. The
OPB EMAC with sgDMA gives
a "device error: 513" (XST_DMA_SG_LIST_EMPTY) when doing the
measurement. I didn't set the option Uncached
shadow RAM support, might this be related to this error?


10.0.0.3; count=10
Linux tmb 2.6.20-uc0 #2 Wed Dec 3 14:05:00 CET 2008 microblaze
CPU-Family:     MicroBlaze
FPGA-Arch:      virtex5
CPU-Ver:        7.00.b
CPU-MHz:        125.00
BogoMips:       62.05
HW-Div:         yes
HW-Shift:       yes
Icache:        8kB
Dcache:        8kB
HW-Debug:       yes
           CPU0
  0:     131403     level OPB-INTC  timer
  1:    1726535      edge OPB-INTC  eth0
  2:       1615      edge OPB-INTC  uartlite
  3:        569      edge OPB-INTC  uartlite
MemTotal:       257344 kB
MemFree:        247212 kB
Buffers:           536 kB

|TCP_STREAM| 14704 14940 14874 14796 14848 14901 14901 14888 14835
14848|Average|14853|
|UDP_STREAM| 23849 23873 23849 23873 23825 23820 23825 23873 23873
23849|Average|23850|
|TCP_MAERTS| 11285 11064 11272 11272 11272 11017 11207 11201 11220
11256|Average|11206|
|TCP_RR| 1208 1211 1212 1205 1206 1208 1210 1215 1173 1211|Average|1205|
|TCP_CRR| 4 4 4 4 4 4 4 4 4 4|Average|4|
|UDP_RR| 1569 1566 1567 1571 1568 1566 1566 1563 1568 1571|Average|1567|
eth0      Link encap:Ethernet  HWaddr 00:0A:35:01:C8:D4
          inet addr:10.0.0.10  Bcast:10.255.255.255  Mask:255.0.0.0
          UP BROADCAST RUNNING  MTU:1500  Metric:1
          RX packets:1037353 errors:0 dropped:0 overruns:0 frame:0
          TX packets:1855988 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:1574701854 (1.4 GiB)  TX bytes:655838803 (625.4 MiB)
          Interrupt:1

lo        Link encap:Local Loopback
          inet addr:127.0.0.1  Mask:255.0.0.0
          UP LOOPBACK RUNNING  MTU:16436  Metric:1
          RX packets:0 errors:0 dropped:0 overruns:0 frame:0
          TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0
          RX bytes:0 (0.0 B)  TX bytes:0 (0.0 B)

#

On Mon, Dec 1, 2008 at 10:40 AM, Bas van Tiel <bvantiel@xxxxxxxxx> wrote:
> Hi Michal,
>
> I have attached the outcome of netperf. I'm still going to make the results for
>
> with ublaze v7.00.b (tactical patch)
> - OPB EMAC (with DMA)
> - PLB EMACLITE
>
> with the latest version of Xilinx
> - PLB EMACLITE
> - PLB ttmac
>
> svn revision petalinux r4909
> EDK92i (service pack 2 + tactical patch for ublaze v7.00.b)
> Design is using OPB emac (programmed IO) connected to the PLB bus
> ML506 board
>
>
> 10.0.0.3; count=10
> Linux tmb 2.6.20-uc0 #26 Mon Dec 1 09:00:09 CET 2008 microblaze
> CPU-Family:     MicroBlaze
> FPGA-Arch:      virtex5
> CPU-Ver:        7.00.b
> CPU-MHz:        125.00
> BogoMips:       62.05
> HW-Div:         yes
> HW-Shift:       yes
> Icache:        8kB
> Dcache:        8kB
> HW-Debug:       yes
> CPU0
> 0:     339552     level OPB-INTC  timer
> 1:     807075     level OPB-INTC  eth0
> 2:          3      edge OPB-INTC  uartlite
> 3:       2826      edge OPB-INTC  uartlite
> MemTotal:       257416 kB
> MemFree:        247564 kB
> Buffers:           612 kB
>
> |TCP_STREAM| 7596 7496 7703 7945 7133 7344 7377 7330 7534 7810
>            |Average  |7526|
> |UDP_STREAM| 18043 17973 18009 17991 18009 17973 17973 17973 17991
> 17973|Average |17990|
> |TCP_MAERTS| 8751 8720 8720 8751 8608 8720 8751 8738 8694 8751
>            |Average  |8720|
> |TCP_RR|     1113 1101 1101 1100 1109 1115 1113 1106 1098 1106
>                 |Average  |1106|
> |TCP_CRR|    259 257 258 259 259 258 258 258 259 259
>                           |Average   |258|
> |UDP_RR|     1396 1397 1396 1397 1397 1396 1397 1396 1396 1397
>                 |Average  |1396|
>
> eth0      Link encap:Ethernet  HWaddr 00:0A:35:01:C8:D4
> inet addr:10.0.0.10  Bcast:10.255.255.255  Mask:255.0.0.0
> UP BROADCAST RUNNING  MTU:1500  Metric:1
> RX packets:826897 errors:0 dropped:0 overruns:0 frame:0
> TX packets:1122734 errors:0 dropped:0 overruns:0 carrier:0
> collisions:0 txqueuelen:1000
> Interrupt:1
>
> lo        Link encap:Local Loopback
> inet addr:127.0.0.1  Mask:255.0.0.0
> UP LOOPBACK RUNNING  MTU:16436  Metric:1
> RX packets:7 errors:0 dropped:0 overruns:0 frame:0
> TX packets:7 errors:0 dropped:0 overruns:0 carrier:0
> collisions:0 txqueuelen:0
>
> PID PORT STAT SIZE SHARED %CPU COMMAND
> 1      S    136K     0K  0.0 /bin/init
> 2      R      0K     0K  0.0 ksoftirqd/0
> 3      S      0K     0K  0.0 events/0
> 4      S      0K     0K  0.0 khelper
> 5      S      0K     0K  0.0 kthread
> 6      S      0K     0K  0.0 kblockd/0
> 7      S      0K     0K  0.0 pdflush
> 8      S      0K     0K  0.0 pdflush
> 9      S      0K     0K  0.0 kswapd0
> 10      S      0K     0K  0.0 aio/0
> 11      S      0K     0K  0.0 mtdblockd
> 36      S    654K     0K  0.0 /bin/sh
> 37      S    643K     0K  0.0 /bin/sh --
> 38      S     67K     0K  0.0 /bin/inetd /etc/inetd.conf
> 1784      R     68K     0K  0.0 ps
>
>
> greetings
> Bas
>
>
> On Fri, Nov 28, 2008 at 11:21 AM, Bas van Tiel <bvantiel@xxxxxxxxx> wrote:
>> Hi Michal,
>>
>> indeed it's building now and the flashing/booting is OK. I will try
>> out some different hardware configurations and
>> will sent the network performance results on short notice. I will
>> revert the "disable_irq" in entry.S to see if I get the "hang-up"
>> problem
>> back to understand for myself why it's needed. I can imagine when
>> stressing the system (generating more interrupts) you could trigger it
>> the problem earlier (ret_from_intr).  Thanx for the help...
>>
>> greetings
>> Bas
>>
>> On Thu, Nov 27, 2008 at 11:17 PM, Michal Simek <monstr@xxxxxxxxx> wrote:
>>> Hi Bas,
>>>
>>> that's new feature which we added some days ago for uart16550 support.
>>> Just go to your hw design and use latest BSP - and generate libraries.
>>> Everything should be fine.
>>>
>>> And of course you can use U-Boot from my site too.
>>>
>>> Both version works well. I use both of them.
>>>
>>> Regards,
>>> Michal
>>>
>>> Bas van Tiel wrote:
>>>> Hi Michal,
>>>>
>>>> thanx, it's getting through the build process. The next stop is at
>>>> u-boot somehow I don't have the define CONFIG_STDINOUT_BASEADDR. Can I
>>>> follow
>>>> your procedure (http://www.monstr.eu/wiki/doku.php?id=uboot:uboot) to
>>>> make a good bootloader or should the one from the petalinux work fine?
>>>>
>>>> greetings
>>>> Bas
>>>>
>>>> On Thu, Nov 27, 2008 at 2:13 PM, Michal Simek <Monstr@xxxxxxxxx> wrote:
>>>>> Hi Bas,
>>>>>
>>>>> Disable uClibc, uclibc is in toolchain
>>>>>
>>>>> Regards,
>>>>> Michal
>>>>>
>>>>>> ----------------------------------------
>>>>>> The problem I'm getting by building the latest svn tree   (r4917,
>>>>>> clean checkout) is a compilation error in one of the files in ucLibc
>>>>>> The error reproduces by selecting the Xilinx and ML506, uClibc
>>>>>> together with the default config files. (that why the cpu version is
>>>>>> 6.00.b)
>>>>>>
>>>>>> Is there any easy way to solve this?
>>>>>>
>>>>>> greetings
>>>>>> Bas
>>>>>>
>>>>>>  microblaze-uclinux-gcc  -Wall -Wstrict-prototypes -Wno-trigraphs
>>>>>> -fno-strict-aliasing  -Os -funit-at-a-time  -mno-xl-soft-mul
>>>>>> -mno-xl-soft-div -mxl-barrel-shift -mcpu=v6.00.b -O2 -g
>>>>>> -fomit-frame-pointer -pipe -fno-common -fno-builtin -Wall
>>>>>> -mno-xl-soft-mul -mno-xl-soft-div -mxl-barrel-shift -mcpu=v6.00.b
>>>>>> -DEMBED    -fno-builtin -nostdinc -D_LIBC -I../../include -I. -isystem
>>>>>> /home/bas.van.tiel/petalinux-svn/tools/linux-i386/microblaze-uclinux-tools/bin/../lib/gcc/microblaze-uclinux/3.4.1/include
>>>>>> -DNDEBUG -c ether_addr.c -o ether_addr.o
>>>>>> In file included from ../../include/linux/posix_types.h:47,
>>>>>>                  from ../../include/linux/types.h:14,
>>>>>>                  from ../../include/linux/if_ether.h:24,
>>>>>>                  from ../../include/netinet/if_ether.h:26,
>>>>>>                  from ../../include/netinet/ether.h:26,
>>>>>>                  from ether_addr.c:32:
>>>>>> ../../include/asm/posix_types.h:18: error: redefinition of typedef
>>>>>> '__kernel_ino_t'
>>>>>> ../../include/bits/kernel_types.h:20: error: previous declaration of
>>>>>> '__kernel_ino_t' was here
>>>>>> ../../include/asm/posix_types.h:19: error: redefinition of typedef
>>>>>> '__kernel_mode_t'
>>>>>> ../../include/bits/kernel_types.h:22: error: previous declaration of
>>>>>> '__kernel_mode_t' was here
>>>>>> ../../include/asm/posix_types.h:20: error: redefinition of typedef
>>>>>> '__kernel_nlink_t'
>>>>>> ../../include/bits/kernel_types.h:23: error: previous declaration of
>>>>>> '__kernel_nlink_t' was here
>>>>>> ../../include/asm/posix_types.h:21: error: redefinition of typedef
>>>>>> '__kernel_off_t'
>>>>>> ../../include/bits/kernel_types.h:24: error: previous declaration of
>>>>>> '__kernel_off_t' was here
>>>>>>
>>>>>>
>>>>>>
>>>>>> On Wed, Nov 26, 2008 at 5:01 PM, Michal Simek <monstr@xxxxxxxxx> wrote:
>>>>>>> Hi Bas,
>>>>>>>
>>>>>>> I look at your app.
>>>>>>> 1. you should use user-apps folder for microblaze apps and changed prepare
>>>>>>> Makefile. I believe that is not so hard to change it. (petalinux-new-app)
>>>>>>> 2. I am missing any readme how to run it. Please add it to that folder and
>>>>>> pack
>>>>>>> and resend.
>>>>>>>
>>>>>>> Thanks,
>>>>>>> Michal
>>>>>>>
>>>>>>>
>>>>>>>> OK,
>>>>>>>>
>>>>>>>> I will try tomorrow with the latest changes from svn.
>>>>>>>>
>>>>>>>> the test program is also attached....
>>>>>>>>
>>>>>>>> thx, for the quick responses..
>>>>>>>>
>>>>>>>> Bas
>>>>>>>>
>>>>>>>> On Wed, Nov 26, 2008 at 10:21 AM, Michal Simek <monstr@xxxxxxxxx> wrote:
>>>>>>>>> Hi All,
>>>>>>>>>
>>>>>>>>> this changes is in latest entry.S too.
>>>>>>>>>
>>>>>>>>> Thanks,
>>>>>>>>> Michal
>>>>>>>>>
>>>>>>>>>
>>>>>>>>>>  Hi,
>>>>>>>>>> We used to have the same problem, although we don't use xemac. Without
>>>>>>>>>> going into possibly misleading details, we noticed a one-line difference
>>>>>>>>>> between our entry.S and the one in the Petalogix tree. After making the
>>>>>>>>>> change we've been able to run a simple script that continuously sends
>>>>>>>>>> packets to the board for several days without crashing. Running the same
>>>>>>>>>> script before the change, the system would freeze in seconds. I hope
>>>>>>>>>> this helps, here's an attachment just in case.
>>>>>>>>>>
>>>>>>>>>> Location -
>>>>>>>>>> petalinux/software/linux-2.6.x-petalogix/arch/microblaze/kernel/entry.S
>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>> -----Original Message-----
>>>>>>>>>> From: Bas van Tiel <bvantiel@xxxxxxxxx>
>>>>>>>>>> To: microblaze-uclinux@xxxxxxxxxxxxxx
>>>>>>>>>> Sent: Tue, 25 Nov 2008 15:10
>>>>>>>>>> Subject: [microblaze-uclinux] UDP packet reception triggers a hangup on
>>>>>>>>>> the microblaze
>>>>>>>>>>
>>>>>>>>>> Hello All,
>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>> when I transmit a continously stream of UDP packets to the microblaze
>>>>>>>>>>
>>>>>>>>>> a hangup is triggered,  I have the following configuration:
>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>> - petalinux-v0.30-rc1 software
>>>>>>>>>>
>>>>>>>>>> - xemac linux driver in PIO mode
>>>>>>>>>>
>>>>>>>>>> - xemac IP block which is connected via a PLB <-> OPB bridge to the
>>>>>>>>>>
>>>>>>>>>> ublaze. (the xemac is configured with "No DMA" and IPIF
>>>>>>>>>>
>>>>>>>>>> (recieve/transmit buffers) are set to 32768 bytes and FIFO depth of
>>>>>>>>>>
>>>>>>>>>> 16.)
>>>>>>>>>>
>>>>>>>>>> - EDK 9.2.02. with the patch (AR30051) from Xilinx for the microblaze
>>>>>> v7.00.b.
>>>>>>>>>> - 2 uarts, one for kernel console, other one for  shell access.
>>>>>>>>>>
>>>>>>>>>> - ML506 Evalutation platform
>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>> I tried to capture the packets via AF_PACKET and AF_INET, both methods
>>>>>>>>>>
>>>>>>>>>> gave the same result -> a kind of hangup of the microblaze:
>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>> symptoms:
>>>>>>>>>>
>>>>>>>>>> 1) no serial input is taken from both terminals
>>>>>>>>>>
>>>>>>>>>> 2) a ping to the microblaze doesn't send a reply packet back.
>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>> Has anybody seen this behavior before with the xemac connected via the
>>>>>>>>>>
>>>>>>>>>> OPB (PLB<->OPB) to the PLB bus, or is this setup with a bridge in
>>>>>>>>>>
>>>>>>>>>> between
>>>>>>>>>>
>>>>>>>>>> asking for trouble and should I look for an alternative?
>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>> Best regards,
>>>>>>>>>>
>>>>>>>>>> Bas
>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>> --- some additional info
>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>> Linux tmb 2.6.20-uc0 #1 Tue Nov 25 14:27:21 CET 2008 microblaze
>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>> CPU-Family:     MicroBlaze
>>>>>>>>>>
>>>>>>>>>> FPGA-Arch:      virtex5
>>>>>>>>>>
>>>>>>>>>> CPU-Ver:        Unknown
>>>>>>>>>>
>>>>>>>>>> CPU-MHz:        125.00
>>>>>>>>>>
>>>>>>>>>> BogoMips:       62.05
>>>>>>>>>>
>>>>>>>>>> HW-Div:         yes
>>>>>>>>>>
>>>>>>>>>> HW-Shift:       yes
>>>>>>>>>>
>>>>>>>>>> Icache:        8kB
>>>>>>>>>>
>>>>>>>>>> Dcache:        8kB
>>>>>>>>>>
>>>>>>>>>> HW-Debug:       yes
>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>>   PID PORT STAT SIZE SHARED %CPU COMMAND
>>>>>>>>>>
>>>>>>>>>> 1      S    135K     0K  0.0 /bin/init
>>>>>>>>>>
>>>>>>>>>> 2      R      0K     0K  0.0 ksoftirqd/0
>>>>>>>>>>
>>>>>>>>>> 3      S      0K     0K  0.0 events/0
>>>>>>>>>>
>>>>>>>>>> 4      S      0K     0K  0.0 khelper
>>>>>>>>>>
>>>>>>>>>> 5      S      0K     0K  0.0 kthread
>>>>>>>>>>
>>>>>>>>>> 6      S      0K     0K  0.0 kblockd/0
>>>>>>>>>>
>>>>>>>>>> 7      S      0K     0K  0.0 pdflush
>>>>>>>>>>
>>>>>>>>>> 8      S      0K     0K  0.0 pdflush
>>>>>>>>>>
>>>>>>>>>> 9      S      0K     0K  0.0 kswapd0
>>>>>>>>>>
>>>>>>>>>> 10      S      0K     0K  0.0 aio/0
>>>>>>>>>>
>>>>>>>>>> 11      S      0K     0K  0.0 mtdblockd
>>>>>>>>>>
>>>>>>>>>> 24      S      0K     0K  0.0 jffs2_gcd_mtd4
>>>>>>>>>>
>>>>>>>>>> 40   S0 S    656K     0K  0.0 /bin/sh
>>>>>>>>>>
>>>>>>>>>> 41   S0 S    643K     0K  0.0 /bin/sh --
>>>>>>>>>>
>>>>>>>>>> 42      S     67K     0K  0.0 /bin/inetd
>>>>>>>>>>
>>>>>>>>>> 55   S0 R     68K     0K  0.0 ps
>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>> pseudo code:
>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>> ethernet mac is running at 100 BaseTX-FD
>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>> sender:  (host PC)
>>>>>>>>>>
>>>>>>>>>>     sd_ = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP);
>>>>>>>>>>
>>>>>>>>>>     sendto(sd_, buf, BUFLEN, 0, (struct sockaddr*)&sa_,
>>>>>> (socklen_t)sizeof(sa_));
>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>> receiver (Microblaze)
>>>>>>>>>>
>>>>>>>>>>  sd_ = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP);
>>>>>>>>>>
>>>>>>>>>>  bind(sd_, (struct sockaddr*)&sa, sizeof(sa))
>>>>>>>>>>
>>>>>>>>>>   if (!select(sd_+1, &rfds, 0, 0, &timeout)) { break; }
>>>>>>>>>>
>>>>>>>>>>  size = recv(sd_, buf, BUFLEN, 0);
>>>>>>>>>>
>>>>>>>>>> ___________________________
>>>>>>>>>>
>>>>>>>>>> microblaze-uclinux mailing list
>>>>>>>>>>
>>>>>>>>>> microblaze-uclinux@xxxxxxxxxxxxxx
>>>>>> <mailto:microblaze-uclinux@xxxxxxxxxxxxxx>
>>>>>>>>>> Project Home Page : http://www.itee.uq.edu.au/~jwilliams/mblaze-uclinux
>>>>>> <http://www.itee.uq.edu.au/%7Ejwilliams/mblaze-uclinux>
>>>>>>>>>> Mailing List Archive :
>>>>>> http://www.itee.uq.edu.au/~listarch/microblaze-uclinux/
>>>>>> <http://www.itee.uq.edu.au/%7Elistarch/microblaze-uclinux/>
>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>> ------------------------------------------------------------------------
>>>>>>>>>> *AOL Email goes Mobile!* You can now read your AOL Emails whilst on the
>>>>>>>>>> move. Sign up <http://info.aol.co.uk/email1> for a free AOL Email
>>>>>>>>>> account with unlimited storage today.
>>>>>>>>> ___________________________
>>>>>>>>> microblaze-uclinux mailing list
>>>>>>>>> microblaze-uclinux@xxxxxxxxxxxxxx
>>>>>>>>> Project Home Page : http://www.itee.uq.edu.au/~jwilliams/mblaze-uclinux
>>>>>>>>> Mailing List Archive :
>>>>>> http://www.itee.uq.edu.au/~listarch/microblaze-uclinux/
>>>>>>>>>
>>>>>>> ___________________________
>>>>>>> microblaze-uclinux mailing list
>>>>>>> microblaze-uclinux@xxxxxxxxxxxxxx
>>>>>>> Project Home Page : http://www.itee.uq.edu.au/~jwilliams/mblaze-uclinux
>>>>>>> Mailing List Archive :
>>>>>> http://www.itee.uq.edu.au/~listarch/microblaze-uclinux/
>>>>>>>
>>>>>> ___________________________
>>>>>> microblaze-uclinux mailing list
>>>>>> microblaze-uclinux@xxxxxxxxxxxxxx
>>>>>> Project Home Page : http://www.itee.uq.edu.au/~jwilliams/mblaze-uclinux
>>>>>> Mailing List Archive : http://www.itee.uq.edu.au/~listarch/microblaze-uclinux/
>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>> ___________________________
>>>>> microblaze-uclinux mailing list
>>>>> microblaze-uclinux@xxxxxxxxxxxxxx
>>>>> Project Home Page : http://www.itee.uq.edu.au/~jwilliams/mblaze-uclinux
>>>>> Mailing List Archive : http://www.itee.uq.edu.au/~listarch/microblaze-uclinux/
>>>>>
>>>>>
>>>> ___________________________
>>>> microblaze-uclinux mailing list
>>>> microblaze-uclinux@xxxxxxxxxxxxxx
>>>> Project Home Page : http://www.itee.uq.edu.au/~jwilliams/mblaze-uclinux
>>>> Mailing List Archive : http://www.itee.uq.edu.au/~listarch/microblaze-uclinux/
>>>>
>>>>
>>> ___________________________
>>> microblaze-uclinux mailing list
>>> microblaze-uclinux@xxxxxxxxxxxxxx
>>> Project Home Page : http://www.itee.uq.edu.au/~jwilliams/mblaze-uclinux
>>> Mailing List Archive : http://www.itee.uq.edu.au/~listarch/microblaze-uclinux/
>>>
>>>
>>
>
___________________________
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References:
- Re: [microblaze-uclinux] Re: [microblaze-uclinux] UDP packet reception triggers a hangup on the microblaze
  - From: Bas van Tiel

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