Ts2phc poll returns zero no events

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August undefined, 2024

WebSep 21, 2024 · The extts events increment normally. The source timestamp jumps 1.907774278 seconds, then 0.195537082 seconds. That is the problem. The source timestamps are produced by this code: /* * Returns the time on the PPS source device at which the most recent * PPS event was generated. WebA tag already exists with the provided branch name. Many Git commands accept both tag and branch names, so creating this branch may cause unexpected behavior.

ts2phc: Synchronizes one or more PTP Hardware Clocks using

WebOn the contrary, if epoll is used too much, epoll will be more efficient_ CTL, the efficiency is still slightly lower. However, once idle connections is used to simulate WAN environment, epoll is far more efficient than selected / poll. 3. Use MMAP to accelerate the message passing between kernel and user space. WebJan 21, 2024 · [Linuxptp-devel] facing problem in running in ts2phc on ubuntu 18.04 Nikhil Gupta Thu, 21 Jan 2024 23:32:57 -0800 Hello, I am facing problem in running ts2phc on … income for immigration sponsor

poll () ingores incoming data when called with 0 timeout

WebIf it returns 0, then the event will be dropped from the queue, but the internal state will still be updated. This allows selective filtering of dynamically arriving events. ... (e.g. pressing Ctrl-C), it will be delivered to the application at the next event poll. There is one caveat when dealing with the SDL_QuitEvent event type. WebSymmetrically no operation is really necessary for POLLOUT, but you usually want to call the next write () as soon as possible. So as a rule of thumb POLLIN -> read, POLLOUT -> write. You should also reset you pollfd struct before calling poll again. fds [0].fd = sck; fds [0].events = POLLIN; fds [0].revents = 0; ret = poll ( fds, 1, 2000); //2 ... WebDec 20, 2024 · If none of the defined events occurs on any selected file descriptor, poll() waits at least timeout milliseconds for an event to occur on any of the selected file descriptors. If the value of timeout is 0, poll() returns immediately. If the value of timeout is -1, poll() blocks until a requested event occurs or until the call is interrupted. income for healthcare subsidy

Linux multiplex select, poll, epoll - Vinchin Backup

ptp4l/ts2phc_slave.c at linuxptp-v3.1.relay · microchip-ung/ptp4l

WebNov 10, 2024 · When running ts2phc together with a program that reads the PHC (e.g. phc2ys or chrony with a PHC refclock), ts2phc will log "poll returns zero, no events" … WebUser space PTP stack for the GNU/Linux operating system. - linuxptp/ts2phc_pps_sink.c at master · richardcochran/linuxptp incentive\u0027s 8oWebJul 26, 2024 · I'm using a framework which I give a socket to and it will call my callback if there is data to be read (or if timeout). However it keeps calling me as fast as my cpu can handle although there is no data to be read from the socket. [pid 16586] poll ( [ {fd=16, events=POLLIN}, {fd=17, events=POLLIN}], 2, 1000) = 2 ( [ {fd=16, revents=POLLIN ... incentive\u0027s 8y

"WebRETURN VALUE top On success, poll() returns a nonnegative value which is the number of elements in the pollfds whose revents fields have been set to a nonzero value (indicating an event or an error). A return value of zero indicates that the system call timed out before any file descriptors became read. " - Ts2phc poll returns zero no events

Ts2phc poll returns zero no events

poll函数讲解***events revents_revernts & pollin_隨意的風的博客 …

WebJan 30, 2024 · The ts2phc program works (or should work) all by itself. > Command : > ts2phc -f ts2phc.cfg -m -s generic > ts2phc[503.770]: poll returns zero, no events > … WebIf the value of fd/msgid is less than 0, events is ignored and revents is set to 0 in that entry on return from poll(). In each pollfd structure, poll() clears the revents member except that where the application requested a report on a condition by setting one of the bits of events listed above, poll() sets the corresponding bit in revents if the requested condition is true.

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WebThe semantics of read(2) depend on whether the eventfd counter currently has a nonzero value and whether the EFD_SEMAPHORE flag was specified when creating the eventfd file descriptor: * If EFD_SEMAPHORE was not specified and the eventfd counter has a nonzero value, then a read(2) returns 8 bytes containing that value, and the counter's value is reset … WebHi, I'm trying to get GPIO Interrrupt functionality working using sysfs and poll calls. The problem appears to be that the poll call is always returnng immediately and is not triggering on the actualy rising edge. I have configured the kernel for this GPIO to be an input which does work correctly. I've also configured the GPIO (114) correctly ...

WebAug 30, 2024 · Previous changes/clarifications to ts2phc have established that: - a PPS sink deals with extts events - a clock deals with synchronization via a servo loop. Therefore, … WebThe default is 0.0. ts2phc.nmea_remote_host, ts2phc.nmea_remote_port. Specifies the serial port character device providing ToD information when using the "nmea" PPS signal …

WebContribute to kontron/linuxptp development by creating an account on GitHub. WebJul 8, 2015 · later in code is written: ret = poll (pfd, 5, 0); With this I am able to receive data from all 5 sockets, and it is working. Functions is returning if socket received data. Problem occurs when I try to send data. I try to add in events POLLOUT and wait that poll function give me that socket is ready for sending.

Webts2phc.pulsewidth. The expected pulse width of the external PPS signal in nanoseconds. When ts2phc.extts_polarity is both, the given pulse width is used to detect and discard the …

WebOct 30, 2024 · This data structure can be created, modified and deleted by three system calls. 1) epoll_create. The epoll instance is created by means of the epoll_create system call, which returns a file descriptor to the epoll instance. The signature of epoll_create is as follows:. #include int epoll_create(int size); The size argument is an … incentive\u0027s 9aWebUp to maxevents are returned by epoll_wait (). The maxevents argument must be greater than zero. The timeout argument specifies the number of milliseconds that epoll_wait () will block. Time is measured against the CLOCK_MONOTONIC clock. A call to epoll_wait () will block until either: • a file descriptor delivers an event; • the call is ... income for household of 4WebMay 17, 2015 · The poll() function returns a non-zero positive value with no events from the sockets i have registered for. Ask Question Asked 7 years, 9 months ago. Modified 7 … incentive\u0027s 8sWebNov 23, 2024 · The ts2phc program will introduce clock synchronization which is orthogonal to the direction in which PPS is emitted (from the master to the slave). To have a more consistent terminology, we can avoid using the ultra-generic term "master" and replace it with "PPS source", which describes the role of the data structure in the new interpretation ... incentive\u0027s 94WebA tag already exists with the provided branch name. Many Git commands accept both tag and branch names, so creating this branch may cause unexpected behavior. income for healthcare tax creditWebThe default is 0 (no correction).-1--ts2phc.extts_polarity. The polarity of the external PPS signal, either "rising" or "falling". Some PHC devices always time stamp both edges. … incentive\u0027s 9fWebSome of the events may not be applicable to all file types. For example, the POLLPRI event usually is not generated when polling a non-STREAMS character device.POLLIN, POLLRDNORM, POLLRDBAND, and POLLPRI are set even if the message is of zero length.. poll(2) checks each file descriptor for the requested events and, on return, indicates … incentive\u0027s 98