Error Errno 105 No Buffer Space Available
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Python No Buffer Space Available
policies of this site About Us Learn more about Stack Overflow the no buffer space available linux company Business Learn more about hiring developers or posting ads with us Stack Overflow Questions Jobs Documentation Tags Users Badges Ask Question x Dismiss Join the Stack Overflow Community Stack Overflow is a community of 4.7 million programmers, just like you, helping each other. Join them; it only takes a minute: Sign up PYTHON - socket “[Errorno 105] No buffer space available” after 10 hours execution up vote 5 down vote favorite I implemented a code that sends pings to different destinations in a continous way, but, after a 10 hours execution cycle, the socket I'm using is affected by some sort of aging that makes the applicaton stop with a "[Errorno 105] No buffer space available". How can I MONITOR and SOLVE this problem? Just for info, once opened, I use always the same socket to send and receive pings: could changing the socket periodically solve the problem? Thanks in advice! SENDER CODE import socket icmp = socket.getprotobyname('icmp') self.socket = socket.socket(socket.AF_INET,socket.SOCK_RAW,icmp) for target in target_list: #... packet = header+data while packet: sent = self.socket.sendto(packet,(target, 1)) packet = packet[sent:] RECEIVER CODE import select whatReady = select.select([self.socket],[],[]) if whatReady[0] != []: for skt in whatReady[0]: #... (recPacket,addr) = self.socket.recvfrom(self.PACKET_SIZE+64) NOTES: self.socket is the same object reference for both modules. I never close or change self.socket during execution. self.PACKET_SIZE = 32 (byte) python sockets buffer runtime-error share|improve this question edited Jul 19 '13 at 15:14 geoffspear 49.6k107195 asked Jun 12 '13 at 9:02 NotoAnonimo 366 1 Posting some code would help solve the issue. –brice Jun 12 '13 at 9:52 It's a 2k lines code: I only added the relevant parts. –NotoAnonimo Jun 12 '13 at 11:57 Is it the sender or the receiver that encounters the er
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they can be used in poll/select I/O loops etc. asynchronous I/O¶ To run async reader thread, one should call NetlinkSocket.bind(async=True). In that case a background thread will be launched. The thread will automatically collect http://docs.pyroute2.org/nlsocket.html all the messages and store into a userspace buffer. Note There is no http://socket-can.996257.n3.nabble.com/write-No-buffer-space-available-td3123.html need to turn on async I/O, if you don't plan to receive broadcast messages. ENOBUF and async I/O¶ When Netlink messages arrive faster than a program reads then from the socket, the messages overflow the socket buffer and one gets ENOBUF on recv(): ... self.recv(bufsize) error: [Errno 105] No buffer space available One way no buffer to avoid ENOBUF, is to use async I/O. Then the library not only reads and buffers all the messages, but also re-prioritizes threads. Suppressing the parser activity, the library increases the response delay, but spares CPU to read and enqueue arriving messages as fast, as it is possible. With logging level DEBUG you can notice messages, that the library started to calm down the parser thread: DEBUG:root:Packet no buffer space burst: the reader thread priority is increased, beware of delays on netlink calls Counters: delta=25 qsize=25 delay=0.1 This state requires no immediate action, but just some more attention. When the delay between messages on the parser thread exceeds 1 second, DEBUG messages become WARNING ones: WARNING:root:Packet burst: the reader thread priority is increased, beware of delays on netlink calls Counters: delta=2525 qsize=213536 delay=3 This state means, that almost all the CPU resources are dedicated to the reader thread. It doesn't mean, that the reader thread consumes 100% CPU - it means, that the CPU is reserved for the case of more intensive bursts. The library will return to the normal state only when the broadcast storm will be over, and then the CPU will be 100% loaded with the parser for some time, when it will process all the messages queued so far. when async I/O doesn't help¶ Sometimes, even turning async I/O doesn't fix ENOBUF. Mostly it means, that in this particular case the Python performance is not enough even to read and store the raw data from the socket. There is no workaround for such cases, except of using something not Python-based. One can still play around wi
view ♦ ♦ | Report Content as Inappropriate ♦ ♦ write: No buffer space available I've been using the mcp251x driver, and I'm getting a "write: No buffer space available" error. That is what cansend prints after I get into this state. I have a user space program that is reading and writing about 20 time a second. I see this with both the work-queues and threaded interrupt version. In the threaded interrupt version unloading and reloading the mcp251x module fixes the problem. In the work-queues version just disconnecting the can device and re-connecting it fixes it. Is there some way to purge/flush the buffer? Is there some other work around sort of reloading the module?thanks,Paul _______________________________________________ Socketcan-core mailing list [hidden email] https://lists.berlios.de/mailman/listinfo/socketcan-core Paul Thomas-12 Reply | Threaded Open this post in threaded view ♦ ♦ | Report Content as Inappropriate ♦ ♦ Re: write: No buffer space available On Sun, Jan 31, 2010 at 3:03 PM, Paul Thomas <[hidden email]> wrote: I've been using the mcp251x driver, and I'm getting a "write: No buffer space available" error. That is what cansend prints after I get into this state. I have a user space program that is reading and writing about 20 time a second. I see this with both the work-queues and threaded interrupt version. In the threaded interrupt version unloading and reloading the mcp251x module fixes the problem. In the work-queues version just disconnecting the can device and re-connecting it fixes it. Is there some way to purge/flush the buffer? Is there some other work around sort of reloading the module?thanks,Paul I've been running for several hours with "one-shot-mode off", and I haven't seen this happen again. Is it possible the higher level of the stack is getting confused by the low-level one-shot option? thanks,Paul _______________________________________________ Socketcan-core mailing list [hidden email] https://lists.berlios.de/mailman/listinfo/socketcan-core Christian Pellegrin Reply | Threaded Open this post in threaded view ♦ ♦ | Report Content as Inappropriate ♦ ♦ Re: write: No buffer space available In reply to this post by Paul Thomas-12 Hi, On Sun, Jan 31, 2010 at 11:03 PM, Paul Thomas <[hidden email]> wrote: > I've been using the mcp251x driver, and I'm getting a "write: No buffer > space available" error. That is what cansend prints after I get into this > state. I have a user space program that is reading and writing about 20 time > a second. > this may mean that somehow the tx queue is stopped and not restarted. I never seen th