[Trilug-ontopic] perl and threads

[Greg Brown]

I don't know if anyone cares but I tried both examples using time to see how
much, well, time both took to run and these are the results (again I don't
think this says much, and I'm not sure what it does say if anything, but I
found it interesting all the same):

Forks:

real 0m10.011s
user 0m0.007s
sys 0m0.011s

Threads:

real 0m10.024s
user 0m0.022s
sys 0m0.008s

On Sun, Mar 13, 2011 at 5:33 PM, Greg Brown <gwbrown1 at gmail.com> wrote:

> I found a good example using both threads and forks to accomplish a basic
> script that I thought I'd pass along.
>
> https://wiki.bc.net/atl-conf/pages/viewpage.action?pageId=20548191
>
> Greg
>
>
> On Fri, Mar 11, 2011 at 12:11 PM, Michael Peters <mpeters at plusthree.com>wrote:
>
>> On 03/11/2011 10:00 AM, Brian Weaver wrote:
>>
>>  I don't know about using threads, but if you want multiple instances with
>>> each working on a single device then why not use a master-child process
>>> model? Have the master fork off N children and maintain a link using
>>> anonymous pipes, unix sockets, or some other IPC mechanism. The master can
>>> inform each child on what system to query and then receive a status back
>>> from the child when it's done.
>>>
>>
>> I agree that you should use processes instead of threads. Threads are ok
>> in Perl but processes are better and since processes are COW in Linux you
>> end up having about the same amount of overhead.
>>
>> But instead of writing your own from scratch, I'd look to CPAN (Perl's
>> biggest weapon) to find something to handle all of the gory bits for you. I
>> like Parallel::ForkManager
>>
>> --
>> Michael Peters
>> Plus Three, LP
>>
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