Ts2phc poll returns zero no events

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August undefined, 2024

WebThe 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. … 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 …

The poll() function returns a non-zero positive value with no events …

WebMay 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 … WebAug 2, 2014 · 2. My application checks for incoming data in a TCP socket by calling poll () with zero timeout. 99% of the time it works fine, when there are data on the socket it sets the POLLIN flag. Sometimes however there are data on the socket (I see the message on wireshark), but poll () returns 0 (timed out) and does not set the POLLIN flag. high by honey

Linux PTP Using PHC Adjust Phase Quick Start Guide - Renesas …

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 … WebSome 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 … 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. high by davido ft adekunle gold

linuxptp/ts2phc.c at master · openil/linuxptp · GitHub

Ts2phc poll returns zero no events

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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. WebRETURN VALUE 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.

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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 ... 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 …

WebDec 26, 2024 · poll函数讲解***events revents. poll提供的功能与select类似，不过在处理流设备时，它能够提供额外的信息。. events和revents是通过对代表各种事件的标志进行逻辑或运算构建而成的。. events包括要监视的事件，poll用已经发生的事件填充revents。. poll函数通过在revents中 ... WebJul 16, 2014 · For pipes and sockets, it depends on the operating system. Linux sets POLLHUP when the program on the writing end of a pipe closes the pipe, and sets POLLIN POLLHUP when the other end of a socket closed the socket, but POLLIN only for a socket shutdown. Recent *BSD set POLLIN POLLUP when the writing end of a pipe closes …

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 … WebUser space PTP stack for the GNU/Linux operating system. - linuxptp/ts2phc_pps_sink.c at master · richardcochran/linuxptp

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.

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, … high by doja catWebJan 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 > … high by davido lyricsWebOct 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 … how far is richlands va from meWebIf 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. high by dua lipaWeb[Linuxptp-devel] [PATCH v3 2/2] ts2phc: Add PTP as a source of ToD PTP IEEE 1588 stack for Linux Brought to you by: rcochran. Summary Files Reviews Support Code Mailing Lists high by chainsmokers lyricsWebSep 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. how far is richlands nc from meWebNov 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" … high by juice world