nonblocking

I am using SOCK_SEQPACKET connection, and it is critical for me to ensure that whole buffer is sent with single write()/send() call. I am also operating with device driver that is designed to handle a complete block of data with single call. At the same time I want to handle the situation when write()/send() blocks due to buffer overflow, i.e. I want to have a feedback whether current implementation gets a bottleneck here. I'm working with glibc, Linux 2.6. I need to implement a method that accepts a buffer, and it either sends a buffer completely or indicates a failure due to blocking (i.e.

Is it possible to schedule a function to execute at every xx millisecs in python,without blocking other events/without using delays/without using sleep ? What is the best way to repeatedly execute a function every x seconds in Python? explains how to do it with sched module, but the solution will block the entire code execution for the wait time(like sleep). The simple scheduling like the one given below is non blocking, but the scheduling works only once- rescheduling is not possible. from threading import Timer def hello(): print "hello, world" t = threading.Timer(10.0, hello) t.start() I am

I have a Java nonblocking server that keeps track of all the socket channels in a selector. I then establish 500 connections to the server and send data regularly. Every piece of data the server receives is echoed back to the client. The problem comes where the test works wonderfully for a couple of hours and then all of the sudden gradually all of the sockets the server is managing throw a Connection timed out IOException when attempting to read data. I've looked into whether or not the client thread was being starved (and not sending data), but I am yielding to the client thread that

In C/C++, how would I turn a blocking socket into a non blocking socket in both WinSocks and *nix; so that select() would work correctly. You can use the pre-processor for the platform specific code. On linux: fcntl(fd, F_SETFL, O_NONBLOCK); Windows : u_long on = 1; ioctlsocket(fd, FIONBIO, &on); select() is supposed to work on blocking sockets. It returns when a read() would return immediately, which is always the case with non-blocking sockets. 来源： https://stackoverflow.com/questions/170909/making-a-nonblocking-socket-for-winsocks-and-nix

From here i have found that node.js implements non-blocking i/o model. But i don't understand how. As javascript is single threaded. How can a single thread do i/o operations and simultaneously executing the further process. It is true that operations such as sleep will be blocking the thread. But I/O events can indeed be asynchronous. Node.js uses an event loop for this. An event loop is “an entity that handles and processes external events and converts them into callback invocations” Whenever data is needed nodejs registers a callback and sends the operation to this event loop. Whenever the

I have been told that for I/O bound applications, non blocking I/O would be better. For CPU bound applications, blocking I/O is much better. I could not find the reason for such a statement. Tried google, but few articles just touches the topic with not much details. Can someone provide the deep depth reason for it? With this, I want to clear myself with what are the short coming of non blocking I/O as well. After going through another thread here ,a reason I could relate was out was if the I/O process is heavy enough then only we can see significant performance improvements using non blocking