So i have installed supervisor and it appears to be running. I have placed my config file for the queue worker in /etc/supervisor/conf.d/laravel-worker.conf And it looks like this And my supervisord.conf looks like this I am getting the error – ERROR (spawn error) when i attempt to start the processes. …
Tag: multithreading
epoll: must I use multi-threading
I’ve got a basic knowledge from here about epoll. I know that epoll can monitor multiple FDs and handle them. My question is: can a heavy event block the server so I must use multithreading? For example, the epoll of a server is monitoring 2 sockets A and B. Now A starts to send lot of messages to the s…
How many ways will a process be terminated in Linux?
I’m reading Advanced Programming in the Unix Environment 3rd Edn, §7.3, Process Termination, the following statement make me confused: There are eight ways for a process to terminate. Normal termination occurs in five ways: Return from main Calling exit Calling _exit or _Exit Return of the last thread f…
linux c: what’s the common use case of “sched_setaffinity” function? I don’t find it useful
The operating system is able to determine how to arrange difference processes/threads onto different cpu cores, the os scheduler does the work well. So when do we really need to call functions like sched_setafficity() for a process, or pthread_setaffinity_np() for a pthread? It doesn’t seem to be able t…
cpp multipleThread: detach non-class type error
I’m writing a program with mutiplethread using cpp , but I have a compiler-error like this: my code could be presented as follow: So anybody have a clue about where I did wrong and what can I do? Answer You’ve hit C++’s Most Vexing Parse. The above declaration doesn’t declare a turnCam…
What is the maximum number of threads that std::async will create and execute asynchronously?
I have a large number (>>100K) of tasks with very high latency (minutes) and very little resource consumption. Potentially they could all be executed in parallel and I was considering using std::async to generate one future for each task. My question is: what is the maximum number of threads that std::a…
Linux: effect of signal on multiple threads
I don’t think this is a duplicate. I have a very specific question about what happens to other threads when a signal handler is invoked. I have a multithreaded program that plays with hardware. On getting SIGTERM (from a parent process), I want the signal handler to set the state of the hardware to a gi…
Is there a Linux equivalent for Windows “InterLockedCompareExchange” API? [closed]
Closed. This question does not meet Stack Overflow guidelines. It is not currently accepting answers. We don’t allow questions seeking recommendations for books, tools, software libraries, and more. You can edit the question so it can be answered with facts and citations. Closed 6 years ago. Improve this ques…
C++ pThread program isn’t running to completion [closed]
Closed. This question needs debugging details. It is not currently accepting answers. Edit the question to include desired behavior, a specific problem or error, and the shortest code necessary to reproduce the problem. This will help others answer the question. Closed 6 years ago. Improve this question IR…
access order of std::atomic bool variable
I’ve a function that accesses(reads and writes to) a std::atomic<bool> variable. I’m trying to understand the order of execution of instructions so as to decide whether atomic will suffice or will I’ve to use mutexes here. The function is given below – I’ve read this page o…