hkaiser changed the topic of #ste||ar to: STE||AR: Systems Technology, Emergent Parallelism, and Algorithm Research | stellar-group.org | HPX: A cure for performance impaired parallel applications | github.com/STEllAR-GROUP/hpx | This channel is logged: irclog.cct.lsu.edu
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<Aarya[m]>
hkaiser:
<Aarya[m]>
* hkaiser: How can we call another function before the actual thread function in hpx, something like pthread_atfork
<hkaiser>
Aarya[m]: good question
<hkaiser>
Aarya[m]: what's your use case
<Aarya[m]>
To implement pthread_atfork :)
<Aarya[m]>
For hpxc
<hkaiser>
well, in hpxc you have ful control over the function that is run by a new thread, so simply call whatever is needed before doing the actual work
<Aarya[m]>
i'm asking for the child process
<Aarya[m]>
Ohk got it, thanks
<Aarya[m]>
hkaiser: Do we have fork (not thread) like functionality in hpx
<hkaiser>
Aarya[m]: no
<hkaiser>
this OS functionality - do we need this?
<Aarya[m]>
What happens if an hpx application calls fork then
<hkaiser>
what should happen? I don't think there is anything special about an HPX application that should make a difference
<hkaiser>
it's a linux process calling fork(), so it is handled like any other linux process
<Aarya[m]>
Right
<Aarya[m]>
Why does pthread have atfork then
<hkaiser>
Aarya[m]: no idea - the question is do we need it
<Aarya[m]>
Well openmp calls it,
<hkaiser>
what for?
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<Aarya[m]>
Reset the library so execution in the child starts "all over again" with clean data structures in initial states.
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<Aarya[m]>
hkaiser: Would get_number_of_cores return number of cpu cores on the system?
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