I followed this article to enable FTRACE
https://lwn.net/Articles/365835/
to test a realtime system, my system uses arm cortexa15 (Description: https://mp.renesas.com/en-us/rzg/marketplace/board/RZGB000003.html)
CONFIG_FTRACE=y
CONFIG_FUNCTION_TRACER=y
CONFIG_FUNCTION_GRAPH_TRACER=y
CONFIG_STACK_TRACER=y
CONFIG_DYNAMIC_FTRACE=y
But, it didn't work, caused the system hang-up when starting kernel.
Even referred How to Enable or configure ftrace module
I would like to test latency in the realtime system with cyclictest (option -b to trigger FTRACER)
cyclictest -a -t -n -p99 -f -b100
It generated dump message:
INFO: debugfs mountpoint: /sys/kernel/debug/tracing/
WARN: tracing_enabled or tracing_on not found
debug fs not mounted, TRACERs not configured?
could not set ftrace_enabled to 0
FATAL: Can't open /sys/kernel/debug/tracing/available_tracers for reading
I repeated a next step to enable a group of tracer configs:
CONFIG_FTRACE=y
CONFIG_DYNAMIC_FTRACE=y
CONFIG_HAVE_DYNAMIC_FTRACE=y
CONFIG_HAVE_FUNCTION_TRACER=y
CONFIG_HAVE_FUNCTION_GRAPH_TRACER=y
CONFIG_HAVE_FTRACE_MCOUNT_RECORD=y
CONFIG_HAVE_SYSCALL_TRACEPOINTS=y
CONFIG_HAVE_C_RECORDMCOUNT=y
CONFIG_TRACING_SUPPORT=y
CONFIG_FUNCTION_TRACER=y
CONFIG_IRQSOFF_TRACER=y
CONFIG_FUNCTION_PROFILER=y
CONFIG_PREEMPT_TRACER=y
CONFIG_SCHED_TRACER=y
CONFIG_ENABLE_DEFAULT_TRACERS=y
CONFIG_FTRACE_SYSCALLS=y
CONFIG_TRACER_SNAPSHOT=y
CONFIG_STACK_TRACER=y
CONFIG_BLK_DEV_IO_TRACE=y
CONFIG_TRACEPOINT_BENCHMARK=y
CONFIG_BACKTRACE_SELF_TEST=y
CONFIG_EARLY_PRINTK=y
CONFIG_DEBUG_LL=y
The result still was the same. Kernel hung and didn't show anything.
Anyone who deal with realtime system and Ftrace can help ? Thanks.
I resolve my problem. Below is a part of my defconfig file.
CONFIG_STACKTRACE_SUPPORT=y
CONFIG_TRACE_IRQFLAGS_SUPPORT=y
CONFIG_TRACEPOINTS=y
CONFIG_STACKTRACE=y
CONFIG_NOP_TRACER=y
CONFIG_TRACER_MAX_TRACE=y
CONFIG_TRACE_CLOCK=y
CONFIG_CONTEXT_SWITCH_TRACER=y
CONFIG_GENERIC_TRACER=y
CONFIG_FTRACE=y
CONFIG_FUNCTION_TRACER=y
CONFIG_FUNCTION_GRAPH_TRACER=y
CONFIG_SCHED_TRACER=y
CONFIG_FTRACE_SYSCALLS=y
CONFIG_TRACER_SNAPSHOT=y
CONFIG_STACK_TRACER=y
CONFIG_DYNAMIC_FTRACE=y
CONFIG_FTRACE_MCOUNT_RECORD=y
After enabling Ftrace tool, the culprit can then be found in the trace output at /sys/kernel/debug/tracing/trace. The kernel function that was executed just before a latency of more than 100 microseconds was detected is marked with an exclamation mark.
Related
I'm getting the following error when I run the simulation.
ERROR: [Common 17-39] 'launch_simulation' failed due to earlier errors.
This project worked fine, but after reinstalling the same Vivado version, I keep getting errors when running the simulation. I have searched and searched several times and places, there are many who end up with this error, but got different suggestions. I honestly do not know what this error means.
The simulation referred me to the behav folder to open the elaborate log for more information about the error.
Here it is:
Vivado Simulator 2017.1
Copyright 1986-1999, 2001-2016 Xilinx, Inc. All Rights Reserved.
Running: C:/Xilinx2017v1/Vivado/2017.1/bin/unwrapped/win64.o/xelab.exe -wto 89ab4d8a8bd74d6d87079040762eb149 --debug typical --relax --mt 2 -L xil_defaultlib -L lib_cdc_v1_0_2 -L proc_sys_reset_v5_0_11 -L fit_timer_v2_0_8 -L secureip -L xpm --snapshot design_1_wrapper_behav xil_defaultlib.design_1_wrapper -log elaborate.log
Using 2 slave threads.
Starting static elaboration
Completed static elaboration
Starting simulation data flow analysis
ERROR: [XSIM 43-3294] Signal EXCEPTION_ACCESS_VIOLATION received.
What could the error 'Signal EXCEPTION_ACCESS_VIOLATION received' mean?
Someone who have tips and advices?
Are you using VHDL 2008 and trying to access a lower level signal in you test bench?
something like
alias CTL_empty is <<signal Inst_VMUX_Top.Inst_Switch_IF.CTL_empty : std_logic>>;
When I try to make decisions based on CTL_empty, my simulation fails
I want to visualise my data base and tried using SchemaSpy, but I can't connect to the data base. It's a mysql data base, running on my computer, accessible under localhost and I called SchemaSpy with the following command:
java -jar schemaspy-6.0.0.jar -t mysql -dp postgresql-42.2.7.jar -db <name> -host <host> -p <port> -s <name> -u <user> -p <password> -o ./output/
I downloaded postgresql-42.2.7.jar as a driver and set the respective parameter in the call. I also tried not setting a driver at all, but it didn't change the output.
I get the following error message after trying to run SchemaSpy:
SchemaSpy generates an HTML representation of a database schema's relationships.
SchemaSpy comes with ABSOLUTELY NO WARRANTY.
SchemaSpy is free software and can be redistributed under the conditions of LGPL version 3 or later.
http://www.gnu.org/licenses/
INFO - Starting Main v6.0.0 on ####### with PID 10774 (/path/to/file started by ##### in /path/to/file)
INFO - The following profiles are active: default
WARNING: An illegal reflective access operation has occurred
WARNING: Illegal reflective access by org.springframework.cglib.core.ReflectUtils$1 (jar:file:/path/to/file/schemaspy-6.0.0.jar!/BOOT-INF/lib/spring-core-4.3.13.RELEASE.jar!/) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int,java.security.ProtectionDomain)
WARNING: Please consider reporting this to the maintainers of org.springframework.cglib.core.ReflectUtils$1
WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations
WARNING: All illegal access operations will be denied in a future release
INFO - Found configuration file: schemaspy.properties
INFO - Started Main in 1.397 seconds (JVM running for 1.944)
INFO - Starting schema analysis
WARN - Connection Failure
I also tried setting the --illegal-access=warn parameter, but no changes.
Does anyone know what problem might be?
Thanks a lot!
I bought a HotPi a while ago, and decided to use it. So I followed the procedure to configure the IR and after a few hours I was able to IR signals on my Raspberry 1.
But my purpose here is to send IR signals, which I tried, without any luck.
So this is the command I try to do (just for test):
irsend SEND_START devinput KEY_POWER ; sleep 3
And this is what lircd tells me:
lircd-0.9.4c[907]: Notice: accepted new client on /var/run/lirc/lircd
lircd-0.9.4c[907]: Info: Cannot configure the rc device for /dev/lirc0
lircd-0.9.4c[907]: Error: invalid send buffer
lircd-0.9.4c[907]: Error: this remote configuration cannot be used to transmit
lircd-0.9.4c[907]: Error: error processing command: SEND_START devinput KEY_POWER
lircd-0.9.4c[907]: Error: transmission failed
lircd-0.9.4c[907]: Info: removed client
Edit:
It seems I'm not using the good drivers. According to the HotPi documentation, I'm suppose to use lirc-rpi, which I'm suppos to install with
sudo modprobe lirc-rpi
Which, at least, doesn't return an error. But trying to configure the interface tells me that the driver doesn't exist:
pi#raspberrypi:~ $ mode2 --driver lirc-rpi --device /dev/lirc0
Driver `lirc-rpi' not found. (Missing -U/--plugins option?)
Available drivers:
accent
alsa_usb
asusdh
atilibusb
atwf83
audio
audio_alsa
awlibusb
bte
bw6130
commandir
creative
creative_infracd
default
devinput
dfclibusb
dsp
dvico
ea65
file
ftdi
ftdi-exp
ftdix
girs
i2cuser
irlink
irtoy
livedrive_midi
livedrive_seq
logitech
macmini
mouseremote
mouseremote_ps2
mp3anywhere
mplay
mplay2
pcmak
pinsys
pixelview
samsung
sb0540
silitek
slinke
sonyir
srm7500libusb
tira
tira_raw
udp
uirt2
uirt2_raw
usb_uirt_raw
usbx
zotac
Here is no info what lirc version you are using. There are vast differences between the legacy 0.9.0 still used in some distros and modern lirc.
That said, the logs seems pretty clear. You are using the devinput driver, right? This driver does not support sending data, reflecting the fact that also the kernel doesn't.
You then need to use another driver - first stop might be the default one. If/when using this other driver, you need another lircd.conf.
Please refer to http://lirc.org/html/configuration-guide.html
EDIT: Ah, lirc-0.9.4c says the log. Sorry, my bad. The reply should still be valid, though.
When you record the remote, use:
irrecord -d /dev/lirc0 -f name.conf
The -f uses raw mode. This then worked for me on the transmit side, before I got same error as you.
When I start a debugging session under eclipse (luna) for my STM32F429 Discovery board. I get the following error:
OpenOCD failed with code (1).
The information in the console pane is:
Open On-Chip Debugger 0.9.0-dev-00223-g1567cae (2015-01-12-13:43)
Licensed under GNU GPL v2
For bug reports, read
http://openocd.sourceforge.net/doc/doxygen/bugs.html
Info : The selected transport took over low-level target control. The results might differ compared to plain JTAG/SWD
adapter speed: 2000 kHz
adapter_nsrst_delay: 100
srst_only separate srst_nogate srst_open_drain connect_deassert_srst
Started by GNU ARM Eclipse
Info : clock speed 2000 kHz
Error: open failed
in procedure 'init'
in procedure 'ocd_bouncer'
in procedure 'transport'
in procedure 'init'
The "board" file being referenced in the debug setup is: stm32f429discovery.cfg
I did have this working for another ST-Micro board and I could do a full debug session with no problems. Suddenly it just stopped being able to access the board and I get the same errors for it as I get with this board.
I was hoping to be able to use the purely open source s/w that runs on Linux to be able to work with these boards. I'm hoping that someone can get me out of this situation.
Thanks in advance.
Cheers!!
What you use the command and debugger?
try:
openocd -f interface/jlink.cfg -f target/stm32f429discovery.cfg
Building a Snort / Barnyard2 / Snorby setup.
Having trouble with getting snorby to see events.
Snort and barnyard2 are both running at boot.
Here is my config relevant to the problem.
Snort:
output unified2: filename snort.u2, limit 128
Barnyard2:
config reference_file: /usr/local/snort/etc/reference.config
config classification_file: /usr/local/snort/etc/classification.config
config gen_file: /usr/local/snort/etc/gen-msg.map
config sid_file: /usr/local/snort/etc/sid-msg.map
config hostname:localhost
config interface: eth1
input unified2
output database: log, mysql, user=snort password=snorbypass dbname=snorby host=localhost
Snorby:
snorby: &snorby
adapter: mysql
username: snort
password: "snorbypass"
host: localhost
rc.local:
ifconfig eth1 up
/usr/local/snort/bin/snort -D -u snort -g snort \
-c /usr/local/snort/etc/snort.conf -i eth1
/usr/local/bin/barnyard2 -c /usr/local/snort/etc/barnyard2.conf \
-d /var/log/snort \
-f snort.u2 \
-w /var/log/snort/barnyard2.waldo \
-D
Current status:
Right now, when the system boots, I can see both the snort and barnyard2 processes running as issued in the rc.local.
When browsing to localhost in a browser, I can login to Snorby and change password, etc...
I can also see the sensor listed under sensors.
When looking at the workers, there is one running. I have also deleted this from from withing the web ui and recreated it without any issues.
When looking in the database for snorby, I can "SELECT * from signature" and see alot of signatures listed here.
Also, I can see the size of the most recent /var/log/snort/snort.u2.1398021580 being constantly updated.
My barnyard.waldo is also in this directory and I can see it with data and you can see that it is no longer a text file, but a binary. This can be re-created by deleting the file re-creating a new barnyard2.waldo text file and restarting barnyard2. By doing so, the file will be turned into a binary file with the size of 2056.
The file ownership is snort:snort and the file permissions on the directory /var/log/snort is 666.
Possible problem??::
The only thing I can see that is not functioning correctly is when I stop barnyard2 and start without -D to see the startup.
I receive a repeating error:
--== Initialization Complete ==--
Using waldo file '/var/log/snort/barnyard2.waldo':
spool directory = /var/log/snort
spool filebase = snort.u2
time_stamp = 1398023768
record_idx = 0
Opened spool file '/var/log/snort/snort.u2.1398023768'
WARNING: No function defined to read header.
WARNING: No function defined to read header.
Closing spool file '/var/log/snort/snort.u2.1398023768'. Read 0 records
Opened spool file '/var/log/snort/snort.u2.1398024174'
WARNING: No function defined to read header.
Waiting for new data
WARNING: No function defined to read header.
WARNING: No function defined to read header.
WARNING: No function defined to read header.
WARNING: No function defined to read header.
WARNING: No function defined to read header.
WARNING: No function defined to read header.
There is very little on this error when I looked through Google, but I believe that barnyard2 is having trouble reading the snort,u2 file. You can see here that it seems to load it okay, but that is about it. Regardless, when looking in the Snorby UI, there are 0 events on the listed sensor.
Any ideas would be greatly appreciated.
Once I ran PulledPork to down load snort rules, I received a new sid-msg.map file for the version of snort currently running. Repeating error resolved.