Michel-- Just read a little deeper on zctx_underlying...
The doc says: will be NULL before first socket // is created. Use with care. And, yet, in this use case, we would have to set the MAX_SOCKETS before the first socket is created.... so, zctx_underlying() won't be useful. murf On Mon, Jun 23, 2014 at 9:41 PM, Steve Murphy <m...@parsetree.com> wrote: > Thanks, Michel-- > > missed that function in the zctx set! > Many thanks! > > murf > > > > On Mon, Jun 23, 2014 at 8:56 PM, Michel Pelletier < > pelletier.mic...@gmail.com> wrote: > >> You can use zctx_underlying to get the low level context object. Here is >> an example using pyczmq: >> >> >>> from pyczmq import zctx, zsocket, zmq >> >>> s = zctx.new() >> >>> zctx.underlying(s) # None until a socket is made >> >>> p = zsocket.new(s, zmq.PUSH) >> >>> zmq.ctx_set(zctx.underlying(s), zmq.MAX_SOCKETS, 10) >> 0 >> >>> zmq.ctx_get(zctx.underlying(s), zmq.MAX_SOCKETS) >> 10 >> >>> >> >> >> >> On Mon, Jun 23, 2014 at 7:26 PM, Steve Murphy <m...@parsetree.com> wrote: >> >>> Philip-- >>> >>> In the code you provided, you are mixing czmq >>> and zmq lib calls, and as stated, it won't work. >>> >>> The zctx_t that zctx_new provides is NOT a void* >>> that zmq_ctx_new() would give you, and the calls to zmq_ctx_set() and >>> .._get() >>> will not work properly if given a zctx_t. If you replace your call >>> to zctx_new() with zmq_ctx_new(), you will get better results. >>> >>> Now, Pieter mentioned that: >>> >>> "You can lower the max sockets per context, before creating your first >>> context. See zmq_ctx_set ()." >>> >>> But I think he meant to say "before creating your first *socket*." >>> >>> (which, btw, is not in the ZMQ ref manual.) >>> >>> I double checked the zctx page in the CZMQ spec, and no function >>> is available to get/set the context options... at least the MAX_SOCKETS, >>> that is. >>> So, if you need to play with MAX_SOCKETS, you have to abandon CZMQ, as >>> there is no >>> way to slip from the zctx_t world to the void* world. >>> >>> And a quick look at max sockets on a new context shows that the default >>> for >>> a new context is 1023. in the 4.1 stuff, there is also a >>> ZMQ_SOCKET_LIMIT, >>> which is the absolute maximum you can set in a set() call, but this isn't >>> in the 4.0 versions. >>> >>> murf >>> >>> >>> >>> On Mon, Jun 23, 2014 at 10:25 AM, Philip Dizon <philipdot...@gmail.com> >>> wrote: >>> >>>> Is it possible to set it ZMQ_MAX_SOCKETS for a czmq context object >>>> because I'm getting an assert failure when I do a zmq_ctx_get? >>>> >>>> e.g. >>>> client->ctx = zctx_new(); >>>> assert(client->ctx); >>>> >>>> int max_sockets = 256; >>>> zmq_ctx_set (client->ctx, ZMQ_MAX_SOCKETS, max_sockets); >>>> assert (zmq_ctx_get (client->ctx, ZMQ_MAX_SOCKETS) == max_sockets); >>>> >>>> >>>> >>>> On Thu, Jun 19, 2014 at 4:05 PM, Pieter Hintjens <p...@imatix.com> wrote: >>>> >>>>> You can lower the max sockets per context, before creating your first >>>>> context. See zmq_ctx_set (). >>>>> >>>>> On Fri, Jun 20, 2014 at 12:39 AM, Philip Dizon <philipdot...@gmail.com> >>>>> wrote: >>>>> > Hi, >>>>> > >>>>> > I noticed that just creating a new zmq context and socket bumps my >>>>> memory >>>>> > usage by 18MB, and this is a big problem on my embedded system which >>>>> only >>>>> > contains about 100MB. I determined this by using top command and >>>>> comparing >>>>> > the difference in mem usage. >>>>> > Is there any sort of option I can use to lower the memory usage? >>>>> > >>>>> > Thanks >>>>> > >>>>> > _______________________________________________ >>>>> > zeromq-dev mailing list >>>>> > zeromq-dev@lists.zeromq.org >>>>> > http://lists.zeromq.org/mailman/listinfo/zeromq-dev >>>>> > >>>>> _______________________________________________ >>>>> zeromq-dev mailing list >>>>> zeromq-dev@lists.zeromq.org >>>>> http://lists.zeromq.org/mailman/listinfo/zeromq-dev >>>>> >>>> >>>> >>>> _______________________________________________ >>>> zeromq-dev mailing list >>>> zeromq-dev@lists.zeromq.org >>>> http://lists.zeromq.org/mailman/listinfo/zeromq-dev >>>> >>>> >>> >>> >>> -- >>> >>> Steve Murphy >>> ParseTree Corporation >>> 57 Lane 17 >>> Cody, WY 82414 >>> ✉ murf at parsetree dot com >>> ☎ 307-899-5535 >>> >>> >>> >>> _______________________________________________ >>> zeromq-dev mailing list >>> zeromq-dev@lists.zeromq.org >>> http://lists.zeromq.org/mailman/listinfo/zeromq-dev >>> >>> >> >> _______________________________________________ >> zeromq-dev mailing list >> zeromq-dev@lists.zeromq.org >> http://lists.zeromq.org/mailman/listinfo/zeromq-dev >> >> > > > -- > > Steve Murphy > ParseTree Corporation > 57 Lane 17 > Cody, WY 82414 > ✉ murf at parsetree dot com > ☎ 307-899-5535 > > > -- Steve Murphy ParseTree Corporation 57 Lane 17 Cody, WY 82414 ✉ murf at parsetree dot com ☎ 307-899-5535
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