[zeromq-dev] migration 4.1.2 to 4.2.2

Mon Mar 13 09:11:56 CET 2017

Hi Doron

In my test, the timers are not supposed to include the poller creation
time. To be sure, I increased the iteration count, but the result stay the
same (10% increase or so). This run does not include your PR.
Does this PR apply to both the new and old APIs ?

Bruno

On Sat, Mar 11, 2017 at 10:03 AM, Doron Somech <somdoron at gmail.com> wrote:

> Following is a PR that fix the slow performance of zmq_poll
>
> https://github.com/zeromq/libzmq/pull/2364
>
>
>
> On Fri, Mar 10, 2017 at 6:30 PM, Doron Somech <somdoron at gmail.com> wrote:
>
>> How many iterations in the test? The creation of the zmq poller might
>> slow you down a bit at the begining...
>>
>> On Mar 10, 2017 6:16 PM, "brunobodin ." <brunobodin at gmail.com> wrote:
>>
>>> Thanks Doron for the explanation
>>>
>>> I replaced zmq_poll calls in my code, the new API is also easier to use
>>> IMHO :-)
>>> but FYI, I still notice a slight slowdown in my test (about 10%), but
>>> this is far from a unit test so I am not sure this is related to the new
>>> poller
>>>
>>> Bruno
>>>
>>> On Fri, Mar 10, 2017 at 5:01 PM, Doron Somech <somdoron at gmail.com>
>>> wrote:
>>>
>>>> Not sure, the change only introduced and recent version,  I think. I
>>>> will make a pull request tomorrow and you will be able to test it.
>>>>
>>>> On Mar 10, 2017 5:43 PM, "Jake" <jake.cobb at gmail.com> wrote:
>>>>
>>>>> Do you all think this is related to the Windows performance issue I
>>>>> reported here?:
>>>>>
>>>>> https://github.com/zeromq/libzmq/issues/2328
>>>>>
>>>>> -Jake
>>>>>
>>>>> On Fri, Mar 10, 2017 at 10:36 AM, Doron Somech <somdoron at gmail.com>
>>>>> wrote:
>>>>>
>>>>>> zmq_poll now use zmq_poller internally, but nof efficiently, because
>>>>>> it is being created on every call. This is why you have drop in
>>>>>> performance, I will fix that anyway.
>>>>>>
>>>>>> Polling on thread safe sockets works differently, this is why zmp
>>>>>> poller was created. previously zmp poll didnt support thread safe sockets.
>>>>>>
>>>>>> Bottom line, zmq poll should be deprecated and zmq poller should be
>>>>>> used.
>>>>>>
>>>>>> On Mar 10, 2017 3:13 PM, "brunobodin ." <brunobodin at gmail.com> wrote:
>>>>>>
>>>>>>> Doron,
>>>>>>>
>>>>>>> I could make a test and it works, thanks !
>>>>>>> is the signaler new in zmq 4.2.2 ? if not, why are the performances
>>>>>>> so différent ?
>>>>>>>
>>>>>>> Regarding thread safe socket, I do not use them yet but may test
>>>>>>> them (probably RADIO/DISH) in a near future. Are there implications between
>>>>>>> poller and thread safe sockets ?
>>>>>>>
>>>>>>> thanks for your help
>>>>>>>
>>>>>>> Bruno
>>>>>>>
>>>>>>> On Fri, Mar 10, 2017 at 1:26 PM, Doron Somech <somdoron at gmail.com>
>>>>>>> wrote:
>>>>>>>
>>>>>>>> If you can use zmq_poller it will solve it.
>>>>>>>>
>>>>>>>> I can make a PR to improve it by making tge creation of the
>>>>>>>> signaler lazy.
>>>>>>>>
>>>>>>>> Are you using thread safe sockets (SERVER CLIENT ...)
>>>>>>>>
>>>>>>>> On Mar 10, 2017 13:01, "brunobodin ." <brunobodin at gmail.com> wrote:
>>>>>>>>
>>>>>>>>> Hi all
>>>>>>>>>
>>>>>>>>> digging deeper, the issue seems related to the connect/bind of
>>>>>>>>> signaler within the poll function.
>>>>>>>>>
>>>>>>>>> On Fri, Mar 10, 2017 at 8:46 AM, brunobodin . <
>>>>>>>>> brunobodin at gmail.com> wrote:
>>>>>>>>>
>>>>>>>>>> Luca,
>>>>>>>>>>
>>>>>>>>>> thanks for you anwser... apparently select is the only method
>>>>>>>>>> available on windows, and is the one used by the appveyor build.
>>>>>>>>>> Draft is not enabled.
>>>>>>>>>>
>>>>>>>>>> still investigating...
>>>>>>>>>>
>>>>>>>>>> Regards
>>>>>>>>>>
>>>>>>>>>> Bruno
>>>>>>>>>>
>>>>>>>>>> On Thu, Mar 9, 2017 at 6:12 PM, Luca Boccassi <
>>>>>>>>>> luca.boccassi at gmail.com> wrote:
>>>>>>>>>>
>>>>>>>>>>> On Thu, 2017-03-09 at 17:22 +0100, brunobodin . wrote:
>>>>>>>>>>> > Hi all,
>>>>>>>>>>> >
>>>>>>>>>>> > I am in the process of migrating my application (windows,
>>>>>>>>>>> visual 2015) from
>>>>>>>>>>> > 4.1.2 to 4.2.2
>>>>>>>>>>> >
>>>>>>>>>>> > The point is that with the new version, polling is now _very_
>>>>>>>>>>> slow, making
>>>>>>>>>>> > my app quite unusable.
>>>>>>>>>>> >
>>>>>>>>>>> > Any hint or suggestion about what I could check ? The polling
>>>>>>>>>>> method is
>>>>>>>>>>> > "select", optimization options of the compiler are set, the
>>>>>>>>>>> performances of
>>>>>>>>>>> > the performance tools (inproc_lat, etc) are ok...
>>>>>>>>>>> > I do not know what to look for next...
>>>>>>>>>>> >
>>>>>>>>>>> > thanks
>>>>>>>>>>> >
>>>>>>>>>>> > Bruno
>>>>>>>>>>>
>>>>>>>>>>> Where you using select before as well?
>>>>>>>>>>> Are you by any chance building with the DRAFT APIs enabled?
>>>>>>>>>>>
>>>>>>>>>>> Kind regards,
>>>>>>>>>>> Luca Boccassi
>>>>>>>>>>>
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>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>
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