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Nico Schottelius 2019-08-15 17:08:10 +02:00
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161
doc/Conclusion.tex
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@ -10,12 +10,9 @@ Sum up what you have done and recapitulate your key findings.
\section{\label{conclusion:softwarenat64}Software based NAT64}
\section{\label{conclusion:general}General}
Many misleading
\section{\label{conclusion:bmv2}BMV2}
\section{\label{conclusion:P4}P4}
NDP parsing problem
@ -175,173 +172,15 @@ idomatic problem: Security issue: not checking checksums before
% ----------------------------------------------------------------------
\section{\label{conclusion:netpfga}NetFGPA - all HERE}
many dependencies
lpm not supported!
Netpfga live,
Many workarounds
packet size / annotation
Needed to debug internal parsing errors
debugging generated tcl code to debug impl1 error
function syntax not supported, using defines instead
match type exact - table must be at least 64 in size
Damaged, enlarged packets
\begin{verbatim}
** The NetPFGA saga
Problems encountered:
- The logfile for a compile run is 10k+ lines
- Many logged errors can actually be ignored (?) like:
ERROR: [VRFC 10-1491] unexpected EOF [/home/nico/master-thesis/netpfga/minip4/nf_sume_sdnet_ip/SimpleSumeSwitch/S_CONTROLLERs.HDL/S_CONTROLLER_SimpleSumeSwitch.vp:37]
ERROR: [VRFC 10-426] cannot find port tuple_out_sume_metadata_DATA on this module [/home/nico/master-thesis/netpfga/minip4/simple_sume_switch/hw/project/simple_sume_switch.srcs/sources_1/ip/nf_sume_sdnet_ip/nf_sume_sdnet_ip/wrapper/nf_sume_sdnet.v:219]
ERROR: [VRFC 10-426] cannot find port tuple_out_sume_metadata_VALID on this module [/home/nico/master-thesis/netpfga/minip4/simple_sume_switch/hw/project/simple_sume_switch.srcs/sources_1/ip/nf_sume_sdnet_ip/nf_sume_sdnet_ip/wrapper/nf_sume_sdnet.v:218]
ERROR: [VRFC 10-426] cannot find port tuple_in_sume_metadata_DATA on this module [/home/nico/master-thesis/netpfga/minip4/simple_sume_switch/hw/project/simple_sume_switch.srcs/sources_1/ip/nf_sume_sdnet_ip/nf_sume_sdnet_ip/wrapper/nf_sume_sdnet.v:185]
ERROR: [VRFC 10-426] cannot find port tuple_in_sume_metadata_VALID on this module [/home/nico/master-thesis/netpfga/minip4/simple_sume_switch/hw/project/simple_sume_switch.srcs/sources_1/ip/nf_sume_sdnet_ip/nf_sume_sdnet_ip/wrapper/nf_sume_sdnet.v:184]
ERROR: [VRFC 10-2063] Module <S_RESETTER_line> not found while processing module instance <S_RESET_clk_line> [/home/nico/master-thesis/netpfga/minip4/simple_sume_switch/hw/project/simple_sume_switch.srcs/sources_1/ip/nf_sume_sdnet_ip/nf_sume_sdnet_ip/Simp
leSumeSwitch/SimpleSumeSwitch.v:332]
ERROR: [VRFC 10-2063] Module <S_RESETTER_lookup> not found while processing module instance <S_RESET_clk_lookup> [/home/nico/master-thesis/netpfga/minip4/simple_sume_switch/hw/project/simple_sume_switch.srcs/sources_1/ip/nf_sume_sdnet_ip/nf_sume_sdnet_ip/
SimpleSumeSwitch/SimpleSumeSwitch.v:343]
ERROR: [VRFC 10-2063] Module <S_RESETTER_control> not found while processing module instance <S_RESET_clk_control> [/home/nico/master-thesis/netpfga/minip4/simple_sume_switch/hw/project/simple_sume_switch.srcs/sources_1/ip/nf_sume_sdnet_ip/nf_sume_sdnet_i
p/SimpleSumeSwitch/SimpleSumeSwitch.v:354]
ERROR: [VRFC 10-2063] Module <TopParser_t> not found while processing module instance <TopParser> [/home/nico/master-thesis/netpfga/minip4/simple_sume_switch/hw/project/simple_sume_switch.srcs/sources_1/ip/nf_sume_sdnet_ip/nf_sume_sdnet_ip/SimpleSumeSwitc
h/SimpleSumeSwitch.v:436]
ERROR: [VRFC 10-2063] Module <TopPipe_lvl_t> not found while processing module instance <TopPipe_lvl> [/home/nico/master-thesis/netpfga/minip4/simple_sume_switch/hw/project/simple_sume_switch.srcs/sources_1/ip/nf_sume_sdnet_ip/nf_sume_sdnet_ip/SimpleSumeS
witch/SimpleSumeSwitch.v:474]
ERROR: [VRFC 10-2063] Module <dummy_table_for_netpfga_t> not found while processing module instance <dummy_table_for_netpfga> [/home/nico/master-thesis/netpfga/minip4/simple_sume_switch/hw/project/simple_sume_switch.srcs/sources_1/ip/nf_sume_sdnet_ip/nf_s
ume_sdnet_ip/SimpleSumeSwitch/SimpleSumeSwitch.v:502]
ERROR: [VRFC 10-2063] Module <TopPipe_lvl_0_t> not found while processing module instance <TopPipe_lvl_0> [/home/nico/master-thesis/netpfga/minip4/simple_sume_switch/hw/project/simple_sume_switch.srcs/sources_1/ip/nf_sume_sdnet_ip/nf_sume_sdnet_ip/SimpleS
umeSwitch/SimpleSumeSwitch.v:533]
ERROR: [VRFC 10-2063] Module <TopDeparser_t> not found while processing module instance <TopDeparser> [/home/nico/master-thesis/netpfga/minip4/simple_sume_switch/hw/project/simple_sume_switch.srcs/sources_1/ip/nf_sume_sdnet_ip/nf_sume_sdnet_ip/SimpleSumeS
witch/SimpleSumeSwitch.v:561]
# launch_simulation -simset sim_1 -mode behavioral
INFO: [Vivado 12-5698] Checking validity of IPs in the design for the 'XSim' simulator...
CRITICAL WARNING: [BD 41-1356] Address block </M04_AXI/Reg> is not mapped into </S00_AXI>. Please use Address Editor to either map or exclude it.
CRITICAL WARNING: [BD 41-1356] Address block </M05_AXI/Reg> is not mapped into </S00_AXI>. Please use Address Editor to either map or exclude it.
WARNING: [VRFC 10-756] identifier state is used before its declaration [/home/nico/master-thesis/netpfga/minip4/simple_sume_switch/hw/project/simple_sume_switch.srcs/sources_1/ip/axis_sim_record_ip0/hdl/axis_sim_record.v:93]
WARNING: [VRFC 10-756] identifier ready_count is used before its declaration [/home/nico/master-thesis/netpfga/minip4/simple_sume_switch/hw/project/simple_sume_switch.srcs/sources_1/ip/axis_sim_record_ip0/hdl/axis_sim_record.v:94]
INFO: [#UNDEF] Sorry, too many errors..
ERROR: [XSIM 43-3322] Static elaboration of top level Verilog design unit(s) in library work failed.
INFO: [USF-XSim-69] 'elaborate' step finished in '1' seconds
INFO: [USF-XSim-99] Step results log file:'/home/nico/master-thesis/netpfga/minip4/simple_sume_switch/hw/project/simple_sume_switch.sim/sim_1/behav/xsim/elaborate.log'
ERROR: [USF-XSim-62] 'elaborate' step failed with error(s). Please check the Tcl console output or '/home/nico/master-thesis/netpfga/minip4/simple_sume_switch/hw/project/simple_sume_switch.sim/sim_1/behav/xsim/elaborate.log' file for more information.
nico@nsg-System:~/master-thesis$ find . -name elaborate.log
nico@nsg-System:~/master-thesis$ find ~ -name elaborate.log
nico@nsg-System:~/master-thesis$
- Scripts that "fail" (generate wrong data) do exit 0 ->
There is no easy / reliable error detection
- Writing tables resulted in ioctl errors
- Hardware test: unclear if first board was/is broken or not,
BUT: second board in different computer allows writing tables
- Many scripts depend on each other in later stages, without clear
dependencies
- There is basically no documentation for someone who "just wants to
compile from P4 to netpfga" or A LOT of documentation (if vivado,
vhld, sdnet documentation is counted)
- Very high complexity in toolchain, scripts that are generated
+ cd /home/nico/projects/P4-NetFPGA/contrib-projects/sume-sdnet-switch/projects/minip4/simple_sume_switch/test/sim_switch_default
+ make
rm -f config_writes.py*
rm -f *.pyc
nico@nsg-System:~$ cat /home/nico/projects/P4-NetFPGA/contrib-projects/sume-sdnet-switch/projects/minip4/testdata/config_writes.py
from NFTest import *
NUM_WRITES = 4
def config_tables():
nftest_regwrite(0x44020050, 0x22222208)
nftest_regwrite(0x44020054, 0x00000822)
nftest_regwrite(0x44020080, 0x00000201)
nftest_regwrite(0x44020040, 0x00000001)
nico@nsg-System:~$ cat /home/nico/projects/P4-NetFPGA/contrib-projects/sume-sdnet-switch/projects/minip4/testdata/config_writes.sh
#!/bin/bash
${SUME_SDNET}/sw/sume/rwaxi -a 0x44020050 -w 0x22222208
${SUME_SDNET}/sw/sume/rwaxi -a 0x44020054 -w 0x00000822
${SUME_SDNET}/sw/sume/rwaxi -a 0x44020080 -w 0x00000201
${SUME_SDNET}/sw/sume/rwaxi -a 0x44020040 -w 0x00000001
nico@nsg-System:~$
- Misleading errors like
ERROR: [USF-XSim-62] 'elaborate' step failed with error(s). Please check the Tcl console output or '/home/nico/master-thesis/netpfga/minip4/simple_sume_switch/hw/project/simple_sume_switch.sim/sim_1/behav/xsim/elaborate.log' file for more information.
nico@nsg-System:~/master-thesis/netpfga$ ls /home/nico/master-thesis/netpfga/minip4/simple_sume_switch/hw/project/simple_sume_switch.sim/sim_1/behav/xsim/elaborate.log
ls: cannot access '/home/nico/master-thesis/netpfga/minip4/simple_sume_switch/hw/project/simple_sume_switch.sim/sim_1/behav/xsim/elaborate.log': No such file or directory
- not using raise() and hiding source of errors (_hexify)
- sometimes flashing fails:
#+BEGIN_CENTER
nico@nsg-System:~/projects/P4-NetFPGA/contrib-projects/sume-sdnet-switch/projects/minip4/simple_sume_switch/bitfiles$ sudo bash -c ". $HOME/master-thesis/netpfga/bashinit && $(pwd -P)/program_switch.sh"
++ which vivado
+ xilinx_tool_path=/opt/Xilinx/Vivado/2018.2/bin/vivado
+ bitimage=minip4.bit
+ configWrites=config_writes.sh
+ '[' -z minip4.bit ']'
+ '[' -z config_writes.sh ']'
+ '[' /opt/Xilinx/Vivado/2018.2/bin/vivado == '' ']'
+ rmmod sume_riffa
+ xsct /home/nico/projects/P4-NetFPGA/contrib-projects/sume-sdnet-switch/tools/run_xsct.tcl -tclargs minip4.bit
rlwrap: warning: your $TERM is 'screen' but rlwrap couldn't find it in the terminfo database. Expect some problems.
RUN loading image file.
minip4.bit
100% 19MB 1.7MB/s 00:11
fpga configuration failed. DONE PIN is not HIGH
invoked from within
"::tcf::eval -progress ::xsdb::print_progress {::tcf::cache_enter tcfchan#0 {tcf_cache_eval {process_tcf_actions_cache_client ::tcfclient#0::arg}}}"
(procedure "::tcf::cache_eval_with_progress" line 2)
invoked from within
"::tcf::cache_eval_with_progress [dict get $arg chan] [list process_tcf_actions_cache_client $argvar] $progress"
(procedure "process_tcf_actions" line 1)
invoked from within
"process_tcf_actions $arg ::xsdb::print_progress"
(procedure "fpga" line 430)
invoked from within
"fpga -f $bitimage"
(file "/home/nico/projects/P4-NetFPGA/contrib-projects/sume-sdnet-switch/tools/run_xsct.tcl" line 33)
+ bash /home/nico/projects/P4-NetFPGA/contrib-projects/sume-sdnet-switch/tools/pci_rescan_run.sh
Check programming FPGA or Reboot machine !
+ rmmod sume_riffa
rmmod: ERROR: Module sume_riffa is not currently loaded
+ modprobe sume_riffa
+ ifconfig nf0 up
nf0: ERROR while getting interface flags: No such device
+ ifconfig nf1 up
nf1: ERROR while getting interface flags: No such device
+ ifconfig nf2 up
nf2: ERROR while getting interface flags: No such device
+ ifconfig nf3 up
nf3: ERROR while getting interface flags: No such device
+ bash config_writes.sh
nico@nsg-System:~/projects/P4-NetFPGA/contrib-projects/sume-sdnet-switch/projects/minip4/simple_sume_switch/bitfiles$
#+END_CENTER
\end{verbatim}
\section{\label{conclusion:realworld}Real world applications}
Can be deployed using the netpfga. Or Barefoot or Arista.
\section{\label{conclusion:outlook}Outlook}
%** Outlook.tex: What needs to be done further, what is planed

28
doc/Results.tex
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@ -265,6 +265,10 @@ and multiple times reflashing the bitstream to the NetFPGA usually
restored the intended behaviour. However due to this ``crashes'', it
was impossible to complete a full benchmark run that would last for
more than one hour.
Sometimes it was also required to reboot the host containing the
NetFPGA card 3 times to enable successful flashing.\footnote{Typical
output of the flashing process would be: ``fpga configuration failed. DONE PIN is not HIGH''}
% ----------------------------------------------------------------------
\subsection{\label{results:netpfga:performance}Performance}
As expected, the NetFGPA card performed at near line speed and offers
@ -326,10 +330,23 @@ error.\footnote{F.i. ``CRITICAL WARNING: [BD 41-737] Cannot set the
parameter TRANSLATION\_MODE on /axi\_interconnect\_0. It is
read-only.'' is a non critical warning.}
Also contradicting
output is generated\footnote{While using version 2018.2, the following
output is generated.\footnote{While using version 2018.2, the following
message was printed: ``WARNING: command 'get\_user\_parameter' will be removed in the 2015.3
release, use 'get\_user\_parameters' instead''.}
Programs or scripts that are called during the compile process do not
necessarily exit non zero if they encountered a critical error. Thus
finding the source of an error can be difficult due to the compile
process continuing after critical errors occured. Not only programs
that have critical errors exit ``successfully'', but also python
scripts that encounter critical paths don't abort with raise(), but
print an error message to stdout and don't abort with an error.
The most often encountered critical compile error is
``Run 'impl\_1' has not been launched. Unable to open''. This error
indicates that something in the previous compile steps failed and can
refer to incorrectly generated testdata to unsupported LPM tables.
The NetFPGA kernel module provides access to virtual Linux
devices (nf0...nf3). However tcpdump does not see any packets that are
emitted from the switch. The only possibility to capture packets
@ -344,6 +361,15 @@ NetPFGA mailing list, the NetFPGA only supports 1500 byte frames at
the moment and additional work is required to implement support for
bigger frames.
Our P4 source code required contains Xilinx
annotations\footnote{F.i. ``@Xilinx\_MaxPacketRegion(1024)''} that define
the maximum packet size in bits. We observed two different errors on
the output packet, if the incoming packets exceeds the specified size:
\begin{itemize}
\item The output packet is longer then the original packet.
\item The output packet is corrupted.
\end{itemize}
While most of the P4 language is supported on the netpfga, some key
techniques are missing or not supported.
\begin{itemize}

BIN
doc/Thesis.pdf
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Binary file not shown.

7
doc/appendix.tex
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@ -1642,13 +1642,6 @@ cp: cannot stat '/home/nico/projects/P4-NetFPGA/contrib-projects/sume-sdnet-swit
[15:31] rainbow:P4-NetFPGA%
\end{verbatim}
Most often occured error:
\begin{verbatim}
# open_run impl_1
ERROR: [Common 17-69] Command failed: Run 'impl_1' has not been launched. Unable to open
Vivado%
\end{verbatim}
\begin{verbatim}
ERROR: [BD 41-171] The modes of the interface pins 'cfg_interrupt'(Slave) and 'pcie3_cfg_interrupt'(Slave) are incompatible. They cannot be connected.
ERROR: [BD 5-3] Error: running connect_bd_intf_net.