Parallel I/O with POSIX threads in C

Question

Is there a simple way in the C language, using POSIX threads, to send all the file output of a program (e.g. fprintf...) to a cpu core other than the one that is executing the code? I mean in such a way that the code keeps on flowing and does not need to wait for the file to have been written to continue.

My program does numerical integration and at every step of integration writes data to a file.

Thank you.

I would like to see an example of what libraries I have to include, and what is the command to send the output to another core. I'm very new in multihreading — Janus Gowda, Mar 22 '14 at 19:28

score 0 · Answer 1 · edited May 23 '17 at 11:49

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You can find the information regarding your question on how to set a particular thread on a particular core from: how to set CPU affinity of a particular pthread?

However setting the 2 thread(writer thread and other thread) on different core does not mean that you does not require to synchronize between these threads. You would have to synchronize between these two threads. By setting 2 threads on different core may give you the better througput(but it depends on many other factor).

edited May 23 '17 at 11:49

Community

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answered Mar 22 '14 at 19:16

Mantosh Kumar

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You don't have to sync using two threads using a queue or two. – this Mar 22 '14 at 19:17
@self, then how would writer thread would know that it has received the data to be written into the file. – Mantosh Kumar Mar 22 '14 at 19:19
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You use a circular queue; you don't even need atomic vars. – this Mar 22 '14 at 19:20
@self That circular queue...is that a place where my data goes before being printed? – Janus Gowda Mar 22 '14 at 19:22
@JanusGowda Yes, search the phrase online. – this Mar 22 '14 at 19:23
@self Ok, sorry. I'm not a computer person. I'm a mathematician and need to improve my code. – Janus Gowda Mar 22 '14 at 19:25

Parallel I/O with POSIX threads in C

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