[IPython-dev] Slow ipython --pylab and ipython notebook startup

Tim Pitman tapitman11@gmail....
Sun Sep 29 13:55:32 CDT 2013


Not sure about the first couple, but the /opt/intel/composerxe* stuff is
MKL. /usr/local/lib/vtk* is the vtk plotting library. Not sure if that
helps at all. I've never tried setting IPython up with MKL so I don't know
how to enable/disable it. That might even be Numpys job.


On Sun, Sep 29, 2013 at 8:34 AM, Name Name <zeitlinie@yahoo.de> wrote:

> This is a cross-post from stackoverflow. I know, this is not absolutely PC, but hopefully someone on this list can provide help.
>
> I have switched from ipython 0.10 to 1.1.0. Now I am experiencing very
> annoying slow-downs of the startup process.
>
> While `ipython` alone is still up in no time, `ipython --pylab` takes a
> very slow start, i.e. `~8 secs` (on an Intel(R) Core(TM)2 Duo CPU P9500 @
> 2.53GHz system) and even more so the new `ipython notebook` which I did not
> have in ipython 0.10, namely `~12 secs`.
>
> When I do `strace -o tessi.txt -tt ipython --pylab` I can identify at
> least sections which seem to be responsible for large chunks of these
> delays (search for HERE!!). Any help on getting rid of those would very
> welcome.
>
> For the `--pylab` option, strace's output contains a section which eats
> away `~5 secs`, and which is not present when starting just ipython, namely
>
>     10:23:24.331968 stat("/etc/resolv.conf", {st_mode=S_IFREG|0644,
> st_size=868, ...}) = 0
>     10:23:24.332028 socket(PF_FILE,
> SOCK_STREAM|SOCK_CLOEXEC|SOCK_NONBLOCK, 0) = 9
>     10:23:24.332074 connect(9, {sa_family=AF_FILE,
> path="/var/run/nscd/socket"}, 110) = 0
>     10:23:24.332152 sendto(9,
> "\2\0\0\0\4\0\0\0\35\0\0\0MYHOST.DOM.AIN."..., 41, MSG_NOSIGNAL, NULL, 0) =
> 41
> HERE!! -> 10:23:24.332227 poll([{fd=9, events=POLLIN|POLLERR|POLLHUP}], 1,
> 5000) = 1 ([{fd=9, revents=POLLIN|POLLHUP}])
> HERE!! -> 10:23:29.336301 read(9,
> "\2\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0", 32) = 32
>     10:23:29.336533 close(9)                = 0
>     10:23:29.336839 close(7)                = 0
>
> where I've replace my actual host name with `MYHOST.DOM.AIN`
>
> In case of `ipython notebook` there seem to be essentially two such
> regions. The first one seems to be the same as for `ipython --pylab`. The
> second one takes away another `~4 secs`
>
>     10:39:31.823298 stat("/etc/resolv.conf", {st_mode=S_IFREG|0644,
> st_size=868, ...}) = 0
>     10:39:31.823358 socket(PF_FILE,
> SOCK_STREAM|SOCK_CLOEXEC|SOCK_NONBLOCK, 0) = 9
>     10:39:31.823405 connect(9, {sa_family=AF_FILE,
> path="/var/run/nscd/socket"}, 110) = 0
>     10:39:31.823499 sendto(9,
> "\2\0\0\0\4\0\0\0\35\0\0\0MYHOST.DOM.AIN."..., 41, MSG_NOSIGNAL, NULL, 0) =
> 41
> HERE!! -> 10:39:31.824166 poll([{fd=9, events=POLLIN|POLLERR|POLLHUP}], 1,
> 5000) = 1 ([{fd=9, revents=POLLIN|POLLHUP}])
> HERE!! -> 10:39:36.827298 read(9,
> "\2\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0", 32) = 32
>     10:39:36.827503 close(9)                = 0
>     10:39:36.827828 close(7)                = 0
>
>     10:39:38.591774 setsockopt(6, SOL_TCP, TCP_NODELAY, [0], 4) = 0
>     10:39:38.591922 poll([{fd=3, events=POLLIN}, {fd=4, events=POLLIN},
> {fd=6, events=POLLIN}, {fd=7, events=POLLIN}], 4, 0) = 0 (Timeout)
>     10:39:38.592007 poll([{fd=3, events=POLLIN}, {fd=4, events=POLLIN},
> {fd=6, events=POLLIN}, {fd=7, events=POLLIN}], 4, 0) = 0 (Timeout)
> HERE!! -> 10:39:38.592049 poll([{fd=3, events=POLLIN}, {fd=4,
> events=POLLIN}, {fd=6, events=POLLIN}, {fd=7, events=POLLIN}], 4, 3600000)
> = ? ERESTART_RESTARTBLOCK (To be restarted)
> HERE!! -> 10:39:42.355658 --- SIGINT (Interrupt) @ 0 (0) ---
>     10:39:42.355773 write(5, "\0", 1)       = 1
>     10:39:42.355916 rt_sigreturn(0x2)       = -1 EINTR (Interrupted system
> call)
>     10:39:42.356113 rt_sigaction(SIGINT, {0x7f26dc0fbfc6, [], SA_RESTORER,
> 0x7f26dbe5a2d0}, {0x7f26dc0fbfc6, [], SA_RESTORER, 0x7f26dbe5a2d0}, 8) = 0
>     10:39:42.356672 clone(child_stack=0x7f26cfb49ff0,
> flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID,
> parent_tidptr=0x7f26cfb4a9d0, tls=0x7f26cfb4a700,
> child_tidptr=0x7f26cfb4a9d0) = 11084
>
> Any help on how to get rid of these delays would be most welcome.
>
> Finally, and while I'm at it. When I look at strace's remaing output I
> see, that on startup, ipython tries to open a lot of 'python related' files
> in places where I would have naively thought that it should never do so,
> and where my systems python definitely has not been installed? All these
> many open calls fail. E.g.:
>
>     11:11:26.465594
> open("/opt/intel/composerxe-2011.3.174/compiler/lib/intel64/tls/libpython2.7.so.1.0",
> O_RDONLY) = -1 ENOENT (No such file or directory)
>     11:11:26.465646
> stat("/opt/intel/composerxe-2011.3.174/compiler/lib/intel64/tls",
> 0x7fff0efb0100) = -1 ENOENT (No such file or directory)
>
>     or
>
>     11:11:26.468293 stat("/usr/local/lib/vtk-5.4/tls/x86_64",
> 0x7fff0efb0100) = -1 ENOENT (No such file or directory)
>     11:11:26.468347 open("/usr/local/lib/vtk-5.4/tls/libpython2.7.so.1.0",
> O_RDONLY) = -1 ENOENT (No such file or directory)
>
> The time total for these calls make up for another significant portion of
> the remaining slow startup, but I cannot point to a specific time slot. Any
> idea how to reduce those calls?
>
> Mark
>
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