ftrace | trace local function calls like strace and ltrace | Code Inspection library

I am trying to solve a MINLP problem using first the IPOPT solver to get an initial solution then the APOPT to get the mixed integer solution. However, I get the following error when calling the APOPT solver:

Error: Exception: Access Violation At line 359 of file ./f90/cqp.f90 Traceback: not available, compile with -ftrace=frame or -ftrace=full Error: 'results.json' not found. Check above for additional error details Traceback (most recent call last): File "optimisation_stack.py", line 244, in Optimise_G(t,ob, jofbuses, q, qc, s, oa, k, l, T, G_previous, C, Y, G_previous, G_max, G_min) File "optimisation_stack.py", line 134, in Optimise_G sol = MINLP(xinit, A, B, A_eq, B_eq, LB ,UB, t, ob, jofbuses, q, qc, s, oa, k, l, T, G_previous, C, Y, G_previous) File "optimisation_stack.py", line 215, in MINLP m_APOPT.solve(disp = False) File "C:\Users\Zineb\AppData\Local\Programs\Python\Python37\lib\site-packages\gekko\gekko.py", line 2227, in solve self.load_JSON() File "C:\Users\Zineb\AppData\Local\Programs\Python\Python37\lib\site-packages\gekko\gk_post_solve.py", line 13, in load_JSON f = open(os.path.join(self._path,'options.json')) FileNotFoundError: [Errno 2] No such file or directory: 'C:\Users\Zineb\AppData\Local\Temp\tmptdgafg1zgk_model1\options.json'

My code is the following, I tried to simplify it as much as possible :

I am trying to solve a MINLP problem using gekko. My code is the following:

I am trying to do an assignment (from another univ's coursepage) which has a line in the starter code (Python with mininet) as

os.system("rmmod tcp_probe; modprobe tcp_probe full=1")

Popen("cat /proc/net/tcpprobe > %s" % (outfile), shell=True)

which gives an error saying that tcp_probe has been disabled.

I found out by googling that tcp_probe has been deprecated in the linux kernel. However it just asks me to 'do the same using ftrace'. I have tried searching online but could not find out how to use ftrace to achieve the same.

Any help is appreciated.

Yesterday we lost contact with 10 identically configured servers, after some investigation the conclusion was that a reboot after security updates had failed.

We have so far not been able to get any of the servers back online, but were lucky enough to be able to reinstall the instances without data loss.

I will paste the console log below, can anyone help me determine the root cause and perhaps give me some advice on if there is a better way to configure the server to make recovery easier (like getting past the "Press Enter to continue." prompt, that it seems to hang in).

The full log is too big for SO, so I put it on pastebin and pasted a redacted version below. I have removed the escape sequences that colorize the output and removed some double new lines, but besides that it is complete.

I'm currently doing some experiments, and I need to record all the events that are generated during the execution of normal stress-ng execution cyle like this /usr/bin/stress-ng -c 80 -t 30 --times --exec 50 --exec-ops 50, specifically the ones related to exec (sched:sched_process_exec and syscalls:sys_enter_execve).
Unfortunately when analysing the trace file, I get some processes that didn't generated any sys_execve, but were captured by the sched_process_exec, which to me makes no sense.
This happened even though no events where lost (in the trace file the entries in buffer/written are the same, and trace-cmd doesn't warn about events lost).
Given this situation I can't understand why this happens, and the only explanation I can give is that these events are not being recorded. Any help would be appreciated.
Here's an example for reference of trace file I get

To be clear in what I'm saying, these lines should be the norm:

I have encountered an error which I did not have before when running the optimizer locally.

I was running my optimization problem in VS Code and wanted to cancel the execution, so I used ctrl+C in the terminal window. After that, I am unable to run my code locally. The code does run with remote = True, but I want to run locally and I need to run it on Win10 Pro OS. I am using Windows 10 Pro with python 3.7.4. The error I get now is:

I am writing a small kernel driver that has the job to act as a honeypot and monitor actions taken on a specific file on the system. To start things off, I used the code in this repository, which I then slightly modified for simplicity reasons so that it works only for one system call: sys_open.

Now I need to gather information for the process and the user that run that system call to open this file, but I could not find any way to do it. I thought that I could use the file descriptor to identify which process has it, but after a discussion with my university professor, he told me that file descriptors are NOT unique system-wide, but only process-wide.

To conclude, is there a way that could give me the PID of the process that implicitly called sys_open?

I'm trying to write a bash script that starts a program, waits for x seconds and than sends the ctrl+c signal to the program to stop it. The program is "trace-cmd" (which is a frontend for ftrace) that records/traces data until ctrl+c is pressed.

I already found a solution to get the PID of trace-cmd, and to send the SIGINT signal using kill to it. Yet, somehow it does not work.

This is my command that is executed (all in one line, just formatted for readability):

I have recently started working with ftrace. I able to get function graph trace using