xilinx Ml405 NFS mount problem
Rick Moleres
Rick.Moleres at xilinx.com
Wed Apr 2 10:54:03 EST 2008
Robert,
I saw an earlier email regarding v1.00b of xps_ll_temac. Besides the checksum offload issue in this version of the core, there is also an issue when receiving multicast packets where we've seen some ping packets lost around receipt of a multicast packets. So for example, we saw this issue when attached to a switch/router that sends out STP packets. When attached directly between target and host the issue disappeared. I believe this issue is fixed in v1.01a of the core being released in EDK 10.1. I also think there's an answer record on how to work around this issue, but I don't have that AR number handy (search the Xilinx website and let me know if you don't find it - if you think this applies to you at all).
The issue you describe below doesn't appear to match the multicast issue, as you should see that regardless of which part you're in. You may want to talk to your FAE as to possible hw timing issues.
Thanks,
Rick
-----Original Message-----
From: linuxppc-embedded-bounces+moleres=xilinx.com at ozlabs.org [mailto:linuxppc-embedded-bounces+moleres=xilinx.com at ozlabs.org] On Behalf Of Robert Woodworth
Sent: Tuesday, April 01, 2008 5:44 PM
To: John Linn
Cc: linuxppc-embedded at ozlabs.org
Subject: RE: xilinx Ml405 NFS mount problem
Can you test your packet loss with your setup??
GigE or 100T??
Do you have hardware checksum turned on in your bitfile?
I strongly believe that there is a timing problem in the MPMC3/LL_TEMAC.
I think the smaller FX12 does not suffer as much as the larger FX60. My
FX12 is fairly good, my FX60 is very bad. Guessing. The FX20 in the
ML405 is somewhere between.
When I make small changes to my bit file (I'm currently working on an
image processing HDL module) the quality of my LL_TEMAC changes
dramatically. If I take out one of my custom modules and re-synthesize
the LL_TEMAC packet loss goes way up. Add another module, re-synthesize
and packet loss is down.
I would *really* like a Xilinx EDK expert give me some advise on this
issue.
Rob.
On Tue, 2008-04-01 at 10:53 -0600, John Linn wrote:
> Now that you say that, I have been running TCP with my NFS mount as I'm mounting across a corporate network.
>
> I am also using the latest LL TEMAC with EDK 10.1.
>
> Thanks,
> John
>
> -----Original Message-----
> From: Robert Woodworth [mailto:rwoodworth at securics.com]
> Sent: Tuesday, April 01, 2008 10:50 AM
> To: MingLiu
> Cc: John Linn; linuxppc-embedded at ozlabs.org
> Subject: RE: xilinx Ml405 NFS mount problem
>
> I think you may be suffering from the latest LL_TEMAC packet loss
> problem. (NFS/UDP really does not like packet loss)
>
>
> Let me guess.
> You are using a base system from "Base System Builder Wizard"?
> EDK 9.2i. Default syntheses/P&R options.
>
> I have seen a massive packet loss problems on my ML403 and two other
> boards I have with an FX60.
>
> This is probably a hardware problem.
> Xilinx has acknowledged an LL_TEMAC problem to me but has not provided a
> fix. I have heard that things are better with EDK/ISE-10.1 but I have
> not tested it.
>
>
> The vendor of one of my boards (Pico) has fixed the problem on the FX60
> by highly constraining the timing of the LL_TEMAC in map/PR. On my
> ML403 I used similar constraints and it fixed the problem, but only if
> the device is plugged into a GigE switch. The problem is still there
> with the same .bit file on a 100-T switch.
>
>
> Are you on a GigE switch?
>
>
>
> Rob.
>
>
>
>
>
>
> On Tue, 2008-04-01 at 16:15 +0000, MingLiu wrote:
> > Dear John,
> >
> > Thank you for your replying.
> >
> > >It’s not obvious to me what the problem is as I don’t see any driver
> > failures. Have you >tried using a ramdisk and then seeing if the
> > network is working before using NFS root?
> >
> > Not yet. I will try it soon. However from the information on the
> > LL_TEMAC, it seems everything is fine and it should work.
> >
> >
> >
> > >And I’m assuming you have used the NFS root before so you know that
> > it’s good for sure.
> >
> >
> >
> > >I test on the ML405 with NFS root and haven’t seen this problem, but
> > my setup is a little different. I use DHCP rather than >a static IP,
> > but other than that it’s similar.
> >
> >
> >
> > Yes. I used NFS before. I can make sure my NFS server works well. Also
> > in principle, static IP should get a same result as DHCP, I think.
> >
> >
> >
> > >How long has it been since you pulled from the Xilinx Git tree?
> >
> >
> >
> > I just pulled the Xilinx tree quite recently. I am using a latest
> > kernel.
> >
> >
> >
> > BR
> >
> > Ming
> >
> >
> >
> >
> >
> > And I’m assuming you have used the NFS root before so you know
> > that it’s good for sure.
> >
> >
> >
> > I test on the ML405 with NFS root and haven’t seen this
> > problem, but my setup is a little different. I use DHCP
> > rather than a static IP, but other than that it’s similar.
> >
> >
> >
> > I’m assuming that you accidentally got 2 different powerup
> > outputs in the message below as the 1st stops and a 2nd starts
> > in the middle.
> >
> >
> >
> > How long has it been since you pulled from the Xilinx Git
> > tree?
> >
> >
> >
> > Thanks,
> >
> > John
> >
> >
> >
> >
> > ______________________________________________________________
> > From: linuxppc-embedded-bounces
> > +john.linn=xilinx.com at ozlabs.org
> > [mailto:linuxppc-embedded-bounces
> > +john.linn=xilinx.com at ozlabs.org] On Behalf Of MingLiu
> > Sent: Tuesday, April 01, 2008 8:12 AM
> > To: linuxppc-embedded at ozlabs.org
> > Subject: xilinx Ml405 NFS mount problem
> >
> >
> >
> >
> > Dear friends,
> >
> > I am bringing up my kernel from Xilinx git tree. Unfortunately I met some
> > problem when mounting the root file system. Here is the information
> > listed. I will appreciate a lot if someone can help me out of the trouble.
> > Thanks a lot!
> >
> >
> > loaded at: 00400000 0059F19C
> > board data at: 0059D120 0059D19C
> > relocated to: 004050C8 00405144
> > zimage at: 00405F3F 0059C025
> > avail ram: 005A0000 08000000
> >
> > Linux/PPC load: root=/dev/nfs
> > ip=192.168.0.4:192.168.0.3:192.168.0.3:255.255.255.0 rw
> > nfsroot=192.168.0.3:/home/mingliu/ml403_rootfs console=ttyUL0,38400
> > mem=32M
> > Uncompressing Linux...done.
> > Now booting the kernel
> > Linux version 2.6.24-rc8-xlnx-g1db182b8-dirty (mingliu at cca01) (gcc version
> > 3.4.1) #7 Tue Apr 1 14:55:25 CEST 2008
> > Xilinx Generic PowerPC board support package (Xilinx ML405) (Virtex-4 FX)
> > Zone PFN ranges:
> > DMA 0 -> 8192
> >
> > Normal 8192 -> 8192
> >
> > HighMem 8192 -> 8192
> > Movable zone start PFN for each node
> > early_node_map[1] active PFN ranges
> > 0: 0 -> 8192
> > Built 1 zonelists in Zone order, mobility grouping on. Total pages: 8128
> > Kernel command line: root=/de v/nfs
> > ip=192.168.0.4:192.168.0.3:192.168.0.3:255.255.255.0 rw
> > nfsroot=192.168.0.3:/home/mingliu/ml403_rootfs console=ttyUL0,38400
> > mem=32M
> > Xilinx INTC #0 at 0x81800000 mapped to 0xFDFFF000
> > PID hash table entries: 128 (order: 7, 512 bytes)
> > Console: colour dummy device 80x25
> > Dentry cache hash table entries: 4096 (order: 2, 16384 bytes)
> > Inode-cache hash table entries: 2048 (order: 1, 8192 bytes)
> > Memory: 28884k available (2552k kernel code, 944k data, 84k init, 0k highmem)
> > SLUB: Genslabs=11, HWalign=32, Order=0-1, MinObjects=4, CPUs=1, Nodes=1
> > Mount-cache hash table entries: 512
> > net_namespace: 64 bytes
> > NET: Registered protocol family 16
> > Registering device uartlite:0
> > Fixup MAC address for xilinx_lltemac:0
> > Regis tering device xilinx_lltemac:0
> > NET: Registered protocol family 2
> > IP route cache hash table entries: 1024 (order: 0, 4096 bytes)
> > TCP established hash table entries: 1024 (order: 1, 8192 bytes)
> > TCP bind hash table entries: 1024 (order: 0, 4096 bytes)
> > TCP: Hash tables configured (established 1024 bind 1024)
> > TCP reno registered
> > sysctl table check failed: /kernel/l2cr .1.31 Missing strategy
> > Call Trace:
> > [c1c0fe50] [c0008b70] show_stack+0x40/0x194 (unreliable)
> > [c1c0fe90] [c003aed4] set_fail+0x68/0x80
> > [c1c0feb0] [c003b4ec] sysctl_check_table+0x600/0x77c
> > [c1c0fef0] [c003b4d4] sysctl_check_table+0x5e8/0x77c
> > [c1c0ff30] [c002605c] register_sysctl_table+0x64/0xb4
> > [c1c0ff50] [c034579c] register_ppc_htab_sysctl+0x18/0x2c
> > [c1c0ff60] [c034482c] kernel_init+0x94/0x2bc
> > [c1c0fff0] [c0004d58] kernel_thread+0x44/0x60
> > Installing knfsd (copyright (C) 1996 okir at monad.swb.de).
> > fuse init (API version 7.9)
> > io scheduler noop registered
> > io scheduler anticipatory registered
> > io scheduler deadline registered
> > io scheduler cfq registered (default)
> > uartlite.0: ttyUL0 at MM IO 0x84000003 (irq = 3) is a uartlite
> > console [ttyUL0] enabled
> > loop: module loaded
> > nbd: registered device at major 43
> > xilinx_lltemac xilinx_lltemac.0: MAC address is now 0: a:35: 1: 2: 3
> > xilinx_lltemac xilinx_lltemac.0: XLlTemac: using DMA mode.
> > XLlTemac: Dma base address: phy: 0x84600100, virt: 0xc3008100
> > XLlTemac: buffer descriptor size: 32768 (0x8000)
> > XLlTemac: Allocating DMA descriptors with kmalloc<6>XLlTemac:
> > (buffer_descriptor_init) phy: 0x1d18000, virt: 0xc1d18000, size: 0x8000
> > XTemac: PHY detected at address 7.
> > xilinx_lltemac xilinx_lltemac.0: eth0: Xilinx TEMAC at 0x81C00000 mapped
> > to 0xC3004000, irq=2
> > console [netcon0] enabled
> > Linux version 2.6.24-rc8-xlnx-g1db182b8-dirty (mingliu at cca01) (gcc version
> > 3.4.1) #7 Tue Apr 1 14:55:25 CEST 2008
> >
> > Xilinx Generic PowerPC board support package (Xilinx ML405)
> > (Virtex-4 FX)
> >
> > Zone PFN ranges:
> > DMA 0 -> 8192
> > Normal 8192 -> 8192
> > HighMem 8192 -> 8192
> > Movable zone start PFN for each node
> > early_node_map[1] active PFN range
> > s
> > 0: 0 -> 8192
> > Built 1 zonelists in Zone order, mobility grouping on. Total pages: 8128
> > Kernel command line: root=/dev/nfs
> > ip=192.168.0.4:192.168.0.3:192.168.0.3:255.255.255.0 rw
> > nfsroot=192.168.0.3:/home/mingliu/ml403_rootfs console=ttyUL0,38400
> > mem=32M
> > Xilinx INTC #0 at 0x81800000 mapped to 0xFDFFF000
> > PID hash table entries: 128 (order: 7, 512 bytes)
> > Console: colour dummy device 80x25
> > Dentry cache hash table entries: 4096 (order: 2, 16384 bytes)
> > Inode-cache hash table entries: 2048 (order: 1, 8192 bytes)
> > Memory: 28884k available (2552k kernel code, 944k data, 84k init, 0k highmem)
> > SLUB: Genslabs=11, HWalign=32, Order=0-1, MinObjects=4, CPUs=1, Nodes=1
> > Mount-cache hash table entries: 512
> > n
> > et_namespace: 64 bytes
> > NET: Registered protocol family 16
> > Registering device uartlite:0
> > Fixup MAC address for xilinx_lltemac:0
> > Registering device xilinx_lltemac:0
> > NET: Registered protocol family 2
> > IP route cache hash table entries: 1024 (order: 0, 4096 bytes)
> > TCP established hash table entries: 1024 (order: 1, 8192 bytes)
> > TCP bind hash table entries: 1024
> > (order: 0, 4096 bytes)
> > TCP: Hash tables configured (established 1024 bind 1024)
> > TCP reno registered
> > sysctl table check failed: /kernel/l2cr .1.31 Missing strategy
> > Call Trace:
> > [c1c0fe50] [c0008b70] show_stack+0x40/0x194 (unreliable)
> > [c1c0fe90] [c003aed4] set_fail+0x68/0x80
> > [c1c0feb0] [c003b4ec] sysctl_check_table+0x600/0x77c
> > [c1c0fef0] [c003b4d4] sysctl_c
> > heck_table+0x5e8/0x77c
> > [c1c0ff30] [c002605c] register_sysctl_table+0x64/0xb4
> > [c1c0ff50] [c034579c] register_ppc_htab_sysctl+0x18/0x2c
> > [c1c0ff60] [c034482c] kernel_init+0x94/0x2bc
> > [c1c0fff0] [c0004d58] kernel_thread+0x44/0x60
> > Installing knfsd (copyright (C) 1996 okir at monad.swb.de).
> > fuse init (API version 7.9)
> > io scheduler noop registered<
> > /SPAN>
> > io scheduler anticipatory registered
> > io scheduler deadline registered
> > io scheduler cfq registered (default)
> > uartlite.0: ttyUL0 at MMIO 0x84000003 (irq = 3) is a uartlite
> > console [ttyUL0] enabled
> > loop: module loaded
> > nbd: registered device at major 43
> > xilinx_lltemac xilinx_lltemac.0: MAC address is now 0: a:35: 1: 2: 3
> > xilinx_lltemac xilinx_lltemac.0: XLlTemac: using DMA mode.
> > XLlTemac: Dma base address: phy: 0x84600100, virt: 0xc3008100
> > XLlTemac: buffer descriptor size: 32768 (0x8000)
> > XLlTemac: Allocating DMA descriptors with kmalloc<6>XLlTemac:
> > (buffer_descriptor_init) phy: 0x1d18000, virt: 0xc1d18000, size: 0x8000
> > XTemac: PHY detected at address 7.
> > xilinx_lltemac xilinx_lltemac.0: eth0: Xilinx TEMAC at 0x81C00000 mapped
> > <
> > SPAN style="FONT-SIZE: 12pt">to 0xC3004000, irq=2
> > console [netcon0] enabled
> > netconsole: network logging started
> > Generic platform RAM MTD, (c) 2004 Simtec Electronics
> > mice: PS/2 mouse device common for all mice
> > TCP cubic registered
> > NET: Registered protocol family 1
> > NET: Registered protocol family 17
> > RPC: Registered udp transport module.
> > RPC: Registered tcp transport module.
> > eth0: XLlTemac: Options: 0x3fa
> > eth0: XLlTemac: allocating interrupt 0 for dma mode tx.
> > eth0: XLlTemac: allocating interrupt 1 for dma mode rx.
> > eth0: XLlTemac: speed set to 1000Mb/s
> > eth0: XLlTemac: Send Threshold = 24, Receive Threshold = 4
> > eth0: XLlTemac: Send Wait bound = 254, Receive Wait bound = 254
> > IP-Config: Complete:
> >
> > device=eth0, addr=192.168.0.4, mask=255.255.255.0, gw=192.168.0.3,
> > host=192.168.0.4, domain=, nis-domain=(none),
> > bootserver=192.168.0.3, rootserver=192.168.0.3, rootpath=
> > Looking up port of RPC 100003/2 on 192.168.0.3
> > rpcbind: server 192.168.0.3 not responding, timed out
> > Root-NFS: Unable to get nfsd port number from server, using default
> > Looking up port of RPC 10000
> > 5/1 on 192.168.0.3
> > rpcbind: server 192.168.0.3 not responding, timed out
> > Root-NFS: Unable to get mountd port number from server, using default
> > mount: server 192.168.0.3 not responding, timed out
> > Root-NFS: Server returned error -5 while mounting /home/mingliu/ml403_rootfs
> > VFS: Unable to mount root fs via NFS, trying floppy.
> > VFS: Cannot open root device "nfs" or unknown-block(2,0)
> > Please append a correct "root=" boot option; here are
> > the available
> > partitions:
> > Kernel panic - not syncing: VFS: Unable to mount root fs on
> > unknown-block(2,0)
> > Rebooting in 180 seconds..
> >
> >
> > BR
> > Ming
> >
> >
> >
> >
> > ______________________________________________________________
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> >
> >
> >
> >
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>
>
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