Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]


Groups > comp.lang.python > #96359

Re: Signal SIGINT ignored during socket.accept

From "James Harris" <james.harris.1@gmail.com>
Newsgroups comp.lang.python
Subject Re: Signal SIGINT ignored during socket.accept
Date 2015-09-11 18:14 +0100
Organization A noiseless patient Spider
Message-ID <msv21t$n1m$1@dont-email.me> (permalink)
References (2 earlier) <msskh1$j00$1@dont-email.me> <mailman.337.1441913195.8327.python-list@python.org> <msso49$28e$1@dont-email.me> <mailman.348.1441936893.8327.python-list@python.org> <msum6c$hv$1@reader1.panix.com>

Show all headers | View raw


"Grant Edwards" <invalid@invalid.invalid> wrote in message 
news:msum6c$hv$1@reader1.panix.com...
> On 2015-09-11, Chris Angelico <rosuav@gmail.com> wrote:
>
>> This is what I meant when I said you would be polling. Effectively,
>> you wake up your program every half-second, check if Ctrl-C has been
>> pressed, and if it hasn't, you go back to sleep again. This is pretty
>> inefficient.
>
> Though it offends one's engineering sensibilities[1], it's just not
> that inefficient.

Indeed.

> I'd bet money you won't even be able to measure the
> difference in CPU usage.

You would win your bet.

> Waking up twice per second and immediately
> calling select() again on any hardware/OS built in the past 50 years
> is going completely negligible (as long as you can ignore the smell).

CPU usage is not the only issue but it is a consideration. I tested it 
before posting the code and couldn't see any significant increase in CPU 
use. To give it a better test I have just left running for a couple of 
hours or so. I am pleased to say it currently reports a cumulative total 
of 0:00:00, i.e. it has not clocked up even a second of CPU time yet!

...

> [1] If offenses to engineering sensibility were of concern, then
>    he wouldn't be using Windows in the first place.  ;)

LOL. I know that's tongue in cheek but I tend to favour portability over 
most other things. So running on Windows as well as Unix is, in my book, 
a Good Thing.

James

Back to comp.lang.python | Previous | NextPrevious in thread | Next in thread | Find similar | Unroll thread


Thread

Signal SIGINT ignored during socket.accept "James Harris" <james.harris.1@gmail.com> - 2015-09-10 19:24 +0100
  Re: Signal SIGINT ignored during socket.accept Chris Angelico <rosuav@gmail.com> - 2015-09-11 04:36 +1000
    Re: Signal SIGINT ignored during socket.accept "James Harris" <james.harris.1@gmail.com> - 2015-09-10 20:11 +0100
      Re: Signal SIGINT ignored during socket.accept Chris Angelico <rosuav@gmail.com> - 2015-09-11 05:26 +1000
        Re: Signal SIGINT ignored during socket.accept "James Harris" <james.harris.1@gmail.com> - 2015-09-10 21:12 +0100
          Re: Signal SIGINT ignored during socket.accept Chris Angelico <rosuav@gmail.com> - 2015-09-11 12:01 +1000
            Re: Signal SIGINT ignored during socket.accept Grant Edwards <invalid@invalid.invalid> - 2015-09-11 13:50 +0000
              Re: Signal SIGINT ignored during socket.accept Marko Rauhamaa <marko@pacujo.net> - 2015-09-11 17:00 +0300
              Re: Signal SIGINT ignored during socket.accept Chris Angelico <rosuav@gmail.com> - 2015-09-12 00:27 +1000
              Re: Signal SIGINT ignored during socket.accept "James Harris" <james.harris.1@gmail.com> - 2015-09-11 18:14 +0100
                Re: Signal SIGINT ignored during socket.accept "James Harris" <james.harris.1@gmail.com> - 2015-09-12 00:15 +0100

csiph-web