[SOLVED] Firefox takes a lot of time to load ...

Question

Since a couple of months I have this little annoying problem with firefox:
It takes 6/7 sec to start.
I use strace to see if I can find what the problem is, but sincerely I am not an expert.
Anyway, I find something interesting ... 
03:31:24.575495 mmap(0x7f2c5aa3d000, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 7, 0x4000) = 0x7f2c5aa3d000
03:31:24.575543 close(7) = 0
03:31:24.575613 mprotect(0x7f2c5aa3d000, 4096, PROT_READ) = 0
03:31:24.575636 munmap(0x7f2c6e61a000, 216499) = 0
03:31:24.575712 socket(PF_INET, SOCK_DGRAM|SOCK_NONBLOCK, IPPROTO_IP) = 7
03:31:24.575740 connect(7, {sa_family=AF_INET, sin_port=htons(53), sin_addr=inet_addr("192.168.1.1")}, 16) = 0
03:31:24.575793 poll([{fd=7, events=POLLOUT}], 1, 0) = 1 ([{fd=7, revents=POLLOUT}])
03:31:24.575828 sendto(7, "\202\257\1\0\0\1\0\0\0\0\0\0\5kanon\7homenet\rtelec"..., 48, MSG_NOSIGNAL, NULL, 0) = 48
03:31:24.575885 poll([{fd=7, events=POLLIN}], 1, 5000) = 1 ([{fd=7, revents=POLLIN}])
03:31:24.576696 ioctl(7, FIONREAD, [48]) = 0
03:31:24.576734 recvfrom(7, "\202\257\201\203\0\1\0\0\0\0\0\0\5kanon\7homenet\rtelec"..., 1024, 0, {sa_family=AF_INET, sin_port=htons(53), sin_addr=inet_addr("192.168.1.1")}, [16]) = 48
03:31:24.576768 close(7) = 0
03:31:24.576795 socket(PF_INET, SOCK_DGRAM|SOCK_NONBLOCK, IPPROTO_IP) = 7
03:31:24.576816 connect(7, {sa_family=AF_INET, sin_port=htons(53), sin_addr=inet_addr("192.168.1.1")}, 16) = 0
03:31:24.576841 poll([{fd=7, events=POLLOUT}], 1, 0) = 1 ([{fd=7, revents=POLLOUT}])
03:31:24.576863 sendto(7, "\316\21\1\0\0\1\0\0\0\0\0\0\5kanon\0\0\1\0\1", 23, MSG_NOSIGNAL, NULL, 0) = 23
03:31:24.576892 poll([{fd=7, events=POLLIN}], 1, 5000) = 0 (Timeout)
03:31:29.582097 poll([{fd=7, events=POLLOUT}], 1, 0) = 1 ([{fd=7, revents=POLLOUT}])
03:31:29.582251 sendto(7, "\316\21\1\0\0\1\0\0\0\0\0\0\5kanon\0\0\1\0\1", 23, MSG_NOSIGNAL, NULL, 0) = 23
03:31:29.582329 poll([{fd=7, events=POLLIN}], 1, 5000) = 1 ([{fd=7, revents=POLLIN}])
03:31:29.614366 ioctl(7, FIONREAD, [98]) = 0
As you can see, it waits 5 sec after a call.
Any idea?
Last edited by saronno (2014-09-13 13:46:22)

Answer 1

stevenhoneyman wrote:
edit: there's a "-v" parameter for strace that should show the unabbreviated stuff
When it happens, run:  lsof -p <pid>
And see what the file descriptors are pointing to
A few questions to try narrow it down if that is a dead end:
Same behaviour if you close it and reopen... or just for the 1st time?
Compiled/linked with "-z now"?
Same with an empty profile?
SSD or HDD?
Timeout happens only if you start firefox and only if no other instances of firefox
are running: so, if there is an existing instance running, the second window
start very quickly.
On reopen same problem.
On closing no problem.
Same thing if I cancel the profile and start it with a new one.
I tried the -v option with strace but I get
the same information as above.
15:13:23.715748 open("/usr/lib/libnss_dns.so.2", O_RDONLY|O_CLOEXEC) = 7
15:13:23.715774 read(7, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0\0\21\0\0\0\0\0\0"..., 832) = 832
15:13:23.715808 fstat(7, {st_dev=makedev(8, 4), st_ino=4639110, st_mode=S_IFREG|0755, st_nlink=1, st_uid=0, st_gid=0, st_blksize=4096, st_blocks=48, st_size=22960, st_atime=2014/09/13-14:53:16, st_mtime=2014/05/16-10:15:29, st_ctime=2014/05/24-14:28:05}) = 0
15:13:23.715867 mmap(NULL, 2117896, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 7, 0) = 0x7f8b10639000
15:13:23.715893 mprotect(0x7f8b1063e000, 2093056, PROT_NONE) = 0
15:13:23.715927 mmap(0x7f8b1083d000, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 7, 0x4000) = 0x7f8b1083d000
15:13:23.715969 close(7) = 0
15:13:23.716053 mprotect(0x7f8b1083d000, 4096, PROT_READ) = 0
15:13:23.716077 munmap(0x7f8b24413000, 216499) = 0
15:13:23.716157 socket(PF_INET, SOCK_DGRAM|SOCK_NONBLOCK, IPPROTO_IP) = 7
15:13:23.716186 connect(7, {sa_family=AF_INET, sin_port=htons(53), sin_addr=inet_addr("192.168.1.1")}, 16) = 0
15:13:23.716253 poll([{fd=7, events=POLLOUT}], 1, 0) = 1 ([{fd=7, revents=POLLOUT}])
15:13:23.716292 sendto(7, "\24\214\1\0\0\1\0\0\0\0\0\0\5kanon\7homenet\rtelec"..., 48, MSG_NOSIGNAL, NULL, 0) = 48
15:13:23.716361 poll([{fd=7, events=POLLIN}], 1, 5000) = 1 ([{fd=7, revents=POLLIN}])
15:13:23.717180 ioctl(7, FIONREAD, [48]) = 0
15:13:23.717231 recvfrom(7, "\24\214\201\203\0\1\0\0\0\0\0\0\5kanon\7homenet\rtelec"..., 1024, 0, {sa_family=AF_INET, sin_port=htons(53), sin_addr=inet_addr("192.168.1.1")}, [16]) = 48
15:13:23.717292 close(7) = 0
15:13:23.717318 socket(PF_INET, SOCK_DGRAM|SOCK_NONBLOCK, IPPROTO_IP) = 7
15:13:23.717350 connect(7, {sa_family=AF_INET, sin_port=htons(53), sin_addr=inet_addr("192.168.1.1")}, 16) = 0
15:13:23.717403 poll([{fd=7, events=POLLOUT}], 1, 0) = 1 ([{fd=7, revents=POLLOUT}])
15:13:23.717438 sendto(7, "n\343\1\0\0\1\0\0\0\0\0\0\5kanon\0\0\1\0\1", 23, MSG_NOSIGNAL, NULL, 0) = 23
15:13:23.717467 poll([{fd=7, events=POLLIN}], 1, 5000) = 0 (Timeout)
15:13:28.722665 poll([{fd=7, events=POLLOUT}], 1, 0) = 1 ([{fd=7, revents=POLLOUT}])
15:13:28.722813 sendto(7, "n\343\1\0\0\1\0\0\0\0\0\0\5kanon\0\0\1\0\1", 23, MSG_NOSIGNAL, NULL, 0) = 23
15:13:28.722885 poll([{fd=7, events=POLLIN}], 1, 5000) = 1 ([{fd=7, revents=POLLIN}])
15:13:28.743628 ioctl(7, FIONREAD, [98]) = 0
15:13:28.743697 recvfrom(7, "n\343\201\203\0\1\0\0\0\1\0\0\5kanon\0\0\1\0\1\0\0\6\0\1\0\0&\364"..., 1024, 0, {sa_family=AF_INET, sin_port=htons(53), sin_addr=inet_addr("192.168.1.1")}, [16]) = 98
15:13:28.743750 close(7) = 0
Anyway, if I understand correctly, It waits for something to read (POLLIN event) ...
fd=7 should be a socket ... a connection to the port 53 of my router ... probably a DNS request, right?
I use an HDD on this machine.
A curious thing is that thunderbird have the same problem.
Last edited by saronno (2014-09-13 13:28:57)