search for: pollin

Thanks for answer. I am very sad to see that. I had examined samba behavior with tracer and had seen too many poll, fcntl and stat system calls by samba task[ldapsrv] process Elapsed Times for PID 1423, SYSCALL TIME (ns) dup 2653 flock 5811 lseek 33513 geteuid 42747

it's verry slow i saw in the archives something about strace and will include it below please help: my dovecot is crawling when downloading through pop here is my last trace file contents :18:04.657706 poll([{fd=10, events=POLLIN|POLLPRI|POLLERR|POLLHUP|POLLNVAL}, {fd=15, events=POLLIN|POLLPRI|POLLERR|POLLHUP|POLLNVAL}, {fd=13, events=POLLIN|POLLPRI|POLLERR|POLLHUP|POLLNVAL}, {fd=17, events=POLLIN|POLLPRI|POLLERR|POLLHUP|POLLNVAL}, {fd=23, events=POLLIN|POLLPRI|POLLERR|POLLHUP|POLLNVAL}, {fd=22, events=POLLIN|POLLPRI|POLLER...

...s, and CourierMailAccount on users with imap/pop logins. the passwords in openldap are plain (b64) i have included the strace output... 13:49:54.112641 gettimeofday({1176385794, 112728}, {0, 0}) = 0 13:49:54.112757 gettimeofday({1176385794, 112771}, NULL) = 0 13:49:54.112792 poll([{fd=5, events=POLLIN|POLLPRI|POLLERR|POLLHUP|POLLNVAL}, {fd=7, events=POLLIN|POLLPRI|POLLERR|POLLHUP|POLLNVAL}, {fd=0, events=POLLIN|POLLPRI|POLLERR|POLLHUP|POLLNVAL}, {fd=3, events=POLLIN|POLLPRI|POLLERR|POLLHUP|POLLNVAL}, {fd=15, events=POLLIN|POLLPRI|POLLERR|POLLHUP|POLLNVAL}, {fd=8, events=POLLIN|POLLPRI|POLLE...

Hi, I installed Dovecot on FreeBSD 4-STABLE machine and have a problem. MTA is postfix delivering to ~/Maildir, runs perfectly. Dovecot is configured to use plaintext auth, config file is at the end of this mail. When trying to get mail via IMAP, I'm getting the following errors: /var/log/dovecot.log > Aug 24 12:00:35 Info: Dovecot starting up > Aug 24 12:00:51 Info: Login: goshik

...n shared object file: Too many open files] So, during the event I performed an strace against the dovecot-auth process and noticed the following error as well: accept(3, 0xbfe05a50, [2]) = -1 EMFILE (Too many open files) gettimeofday({1192538310, 41972}, NULL) = 0 poll([{fd=3, events=POLLIN|POLLPRI|POLLERR|POLLHUP|POLLNVAL, revents=POLLIN}, {fd=0, events=POLLIN|POLLPRI|POLLERR|POLLHUP|POLLNVAL}, {fd=18, events=POLLIN|POLLPRI|POLLERR|POLLHUP|POLLNVAL}, {fd=10, events=POLLIN|POLLPRI|POLLERR|POLLHUP|POLLNVAL}, {fd=7, events=POLLIN|POLLPRI|POLLERR|POLLHUP|POLLNVAL}, {fd=23, events=POLLIN|...

...gi?id=1495893) Sometimes libvirtd just hangs and stops answering for virsh requests (like `virsh list --all`). At those moments: # strace -p 5786 read(53, "\0\0\0\34", 4) = 4 read(53, "keep\0\0\0\1\0\0\0\2\0\0\0\2\0\0\0\0\0\0\0\0", 24) = 24 poll([{fd=5, events=POLLIN}, {fd=7, events=POLLIN}, {fd=12, events=POLLIN}, {fd=13, events=POLLIN}, {fd=14, events=POLLIN}, {fd=15, events=POLLIN}, {fd=19, events=POLLIN}, {fd=23, events=POLLIN|POLLERR|POLLHUP}, {fd=21, events=POLLIN|POLLERR|POLLHUP}, {fd=27, events=POLLIN|POLLERR|POLLHUP}, {fd=25, events=POLLIN|POLLERR...

...nd stays there indefinitely. This seems to happen when a QEMU VM is starting up, although on one occasion I *think* I saw it happen after a QEMU VM was p2p-migrated. Doing strace -f -p <libvirtd pid> reveals a flood of poll() functions calls like these: [pid 1690] poll([{fd=3, events=POLLIN}, {fd=6, events=POLLIN}, {fd=12, events=POLLIN|POLLERR|POLLHUP}, {fd=11, events=POLLIN|POLLERR|POLLHUP}, {fd=10, events=POLLIN|POLLERR|POLLHUP}, {fd=9, events=POLLIN|POLLERR|POLLHUP}, {fd=24, events=POLLIN|POLLERR|POLLHUP}, {fd=21, events=POLLOUT}, {fd=14, events=POLLIN}, {fd=15, events=POLLIN}, {f...

...rtd just hangs and stops answering for virsh requests >(like `virsh list --all`). > >At those moments: > ># strace -p 5786 >read(53, "\0\0\0\34", 4) = 4 >read(53, "keep\0\0\0\1\0\0\0\2\0\0\0\2\0\0\0\0\0\0\0\0", 24) = 24 >poll([{fd=5, events=POLLIN}, {fd=7, events=POLLIN}, {fd=12, >events=POLLIN}, {fd=13, events=POLLIN}, {fd=14, events=POLLIN}, {fd=15, >events=POLLIN}, {fd=19, events=POLLIN}, {fd=23, >events=POLLIN|POLLERR|POLLHUP}, {fd=21, events=POLLIN|POLLERR|POLLHUP}, >{fd=27, events=POLLIN|POLLERR|POLLHUP}, {fd=25, >events...

...disk about twice a minute. The access to /dev/sda2 is causing the system to keep the disk from going into standby mode. I don't understand the call to quotactl every minute when no one is trying to access the share. An strace of one of the processes shows the following: poll([{fd=13, events=POLLIN|POLLHUP}, {fd=6, events=POLLIN|POLLHUP}, {fd=12, events=POLLIN|POLLHUP}, {fd=31, events=POLLIN|POLLHUP}], 4, 60000) = 1 ([{fd=31, revents=POLLIN}]) readv(31, [{"\0\0\0\230", 4}], 1) = 4 readv(31, [{"\376SMB@\0\1\0\0\0\0\0\5\0\1\0000\0\0\0\0\0\0\0V\1\0\0\0\0\0\0"..., 152}],...

Good day oh technical ones . I was running Samba 4 (client only, not using it as a DC so effectively running Samba 3 code from the Samba 4 tree) and, other than a little "Gotcha!" regarding decoding Kerberos PACs, it was all working perfectly. Then recently I had to upgrade, to "4.2.0pre1-GIT-b505111" (I had to upgrade the OS on the server

...cntl(4, F_GETFL) = 0x2 (flags O_RDWR) fcntl(4, F_SETFL, O_RDWR|O_NONBLOCK) = 0 fcntl(4, F_GETFD) = 0 fcntl(4, F_SETFD, FD_CLOEXEC) = 0 connect(4, {sa_family=AF_FILE, path="/var/run/samba/winbindd/pipe"}, 110) = 0 poll([{fd=4, events=POLLIN|POLLOUT|POLLHUP}], 1, -1) = 1 ([{fd=4, revents=POLLOUT}]) write(4, "0\10\0\0\0\0\0\0\0\0\0\0\17\34\0\0\0\10\0\0\0\0\0\0\0\0\0\0\0\0\0\0"..., 2096) = 2096 poll([{fd=4, events=POLLIN|POLLHUP}], 1, 5000) = 1 ([{fd=4, revents=POLLIN}]) read(4, "\250\r\0\0\2\0\0\0\33\0\0\0\0\0\0\0\0\0\0\0...

...! it compiled straight out of the box. i can start the server and it even connects to a remote server and starts to relay. when i run xmms from another machine and connect, it stops at "pre-buffering 0/32k". here's an strace of the icecast server at that time: poll([{fd=3, events=POLLIN}], 1, 100) = 0 poll([{fd=3, events=POLLIN}], 1, 100) = 0 poll([{fd=3, events=POLLIN}], 1, 100) = 0 poll([{fd=3, events=POLLIN}], 1, 100) = 0 poll([{fd=3, events=POLLIN}], 1, 100) = 0 poll([{fd=3, events=POLLIN}], 1, 100) = 0 poll([{fd=3, events=POLLIN, revents=POLLIN}], 1, 100) = 1 gets...

...o wrote 2018-01-18 14:27: > On Thu, Jan 18, 2018 at 11:30:16AM +0700, Artem Likhachev wrote: >> # strace -p 5786 >> read(53, "\0\0\0\34", 4) = 4 >> read(53, "keep\0\0\0\1\0\0\0\2\0\0\0\2\0\0\0\0\0\0\0\0", 24) = 24 >> poll([{fd=5, events=POLLIN}, {fd=7, events=POLLIN}, {fd=12, >> events=POLLIN}, {fd=13, events=POLLIN}, {fd=14, events=POLLIN}, >> {fd=15, >> events=POLLIN}, {fd=19, events=POLLIN}, {fd=23, >> events=POLLIN|POLLERR|POLLHUP}, {fd=21, >> events=POLLIN|POLLERR|POLLHUP}, >> {fd=27, events=POL...

...my mail client, and when playing around with powertop I discovered that Dovecot (in particular imap-login) wakes up every 1000ms and then every 50ms even when no clients are connected. A bit of stracing shows this: gettimeofday({1180875699, 667917}, NULL) = 0 <0.000010> poll([{fd=7, events=POLLIN|POLLPRI|POLLERR|POLLHUP|POLLNVAL}, {fd=10, events=POLLIN|POLLPRI|POLLERR|POLLHUP|POLLNVAL}, {fd=3, events=POLLIN|POLLPRI|POLLERR|POLLHUP|POLLNVAL}, {fd=0, events=POLLIN|POLLPRI|POLLERR|POLLHUP|POLLNVAL}, {fd=1, events=POLLIN|POLLPRI|POLLERR|POLLHUP|POLLNVAL}], 5, 999) = 0 <0.999595> gettimeof...

...ang for 35 seconds before returning. For example, I ran 'strace ps aux' at 22:22:55, it doesn't return until 22:23:30 The 35 seconds delay happens where the timeouts are listed here: connect(3, {sa_family=AF_FILE, path="/var/run/winbindd/pipe"}, 110) = 0 poll([{fd=3, events=POLLIN|POLLHUP}], 1, 0) = 0 (Timeout) write(3, "0\10\0\0\0\0\0\0\0\0\0\0 at +\0\0\0\10\0\0\0\0\0\0\0\0\0\0\0\0\0\0"..., 2096) = 2096 poll([{fd=3, events=POLLIN|POLLHUP}], 1, 5000) = 1 ([{fd=3, revents=POLLIN}]) read(3, "\250\r\0\0\2\0\0\0\33\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0&quo...

...55.446487 fcntl(4, F_SETFD, FD_CLOEXEC) = 0 <0.000006> 15:19:55.446516 connect(4, {sa_family=AF_FILE, path="/usr/local/samba/var/lib/winbindd_privileged/pipe"}, 110) = 0 <0.000097> 15:19:55.446655 close(3) = 0 <0.000056> 15:19:55.446740 poll([{fd=4, events=POLLIN|POLLHUP}], 1, 0) = 0 (Timeout) <0.000007> 15:19:55.446776 write(4, "0\10\0\0\22\0\0\0\0\0\0\0gk\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0"..., 2096) = 2096 <0.000120> 15:19:55.446951 poll([{fd=4, events=POLLIN|POLLHUP}], 1, 5000) = 0 (Timeout) <5.002095> 15:20:00.449121 poll([...

...useful in the logs and a PS shows a nmb process still running. This last time around, I had a ptrace running on both nmbd processes and found that the parent process was the one still running, but the child process had died. Here's the end of the ptrace of the child: poll([{fd=9, events=POLLIN, revents=POLLIN}], 1, 5000) = 1 ioctl(9, FIONREAD, [81]) = 0 recvfrom(9, "\t\1\201\200\0\1\0\2\0\0\0\0\vBORDER-ACCT\tbordere"..., 1024, 0, {sa_family=AF_INET, sin_port=htons(53), sin_addr=inet_addr("127.0.0.1")}, [16]) = 81 close(9)...

...cal loop using poll might look like: fd = nbd_aio_get_fd (nbd); for (;;) { /* <-- If you need to issue more commands, do that here. */ dir = nbd_aio_get_direction (nbd); pollfd[0].fd = fd; pollfd[0].events = 0; if (dir & LIBNBD_AIO_DIRECTION_READ) pollfd[0].events |= POLLIN; if (dir & LIBNBD_AIO_DIRECTION_WRITE) pollfd[0].events |= POLLOUT; poll (pollfd, 1, -1); if (pollfd[0].revents & LIBNBD_AIO_DIRECTION_READ) nbd_aio_notify_read (); else if (pollfd[0].revents & LIBNBD_AIO_DIRECTION_WRITE) nbd_aio_notify_write (); } -------...

...would permit reads to be in a separate thread from writes would require that the nbd_aio_pread() call (in the nbdkit thread) run until the entire request is out the door, even if it temporarily blocks on write() and has to wait for POLLOUT. Meanwhile, the reader thread would spin waiting for just POLLIN events, rather than having to service any of the POLLOUT of the writer thread(s) running in parallel. > > The reasons why libnbd can't do this are: > > Problem (a) : Only one thread of control can hold the libnbd handle > lock (h->lock), and since there can only be one thre...

...127.0.0.1:34661 ESTABLISHED tcp 0 0 127.0.0.1:34661 127.0.0.1:993 ESTABLISHED STRACE: 17:00:33.225030 gettimeofday({1171501233, 225048}, {480, 0}) = 0 17:00:33.225072 gettimeofday({1171501233, 225090}, NULL) = 0 17:00:33.225113 poll([{fd=7, events=POLLIN|POLLPRI|POLLERR|POLLHUP|POLLNVAL}, {fd=10, events=POLLIN|POLLPRI|POLLERR|POLLHUP|POLLNVAL}, {fd=3, events=POLLIN|POLLPRI|POLLERR|POLLHUP|POLLNVAL}, {fd=1, events=POLLIN|POLLPRI|POLLERR|POLLHUP|POLLNVAL}], 4, 0) = 0 17:00:33.225163 gettimeofday({1171501233, 225182}, {480, 0}) = 0 17:00:33.225212...