I think select/poll is more appropriate when you deal with more than one file descriptor at a time (ex. a server watching couples of sockets).
My problem is very simple: - read data from a file - process data (CPU intensive) - write data.
The processing part and the IO takes comparable times. All I'm trying to do is to use two buffers, and while one is loaded/saved to disk, the other get processed (in theory the CPU should be free, since the disk transfer is done using DMA).
Nothing new here, I just wanted to have a cleaner code - using only the POSIX standard if possible and not messing with any multithreading library just for this (at least not calling it directly from my code).
-iulian
Jonathan Bartlett wrote:
Or just use select/poll
As far as I'm aware, kernel-level AIO is only in Enterprise Red hat. There may be some libraries that simulate it with threads, however.
Jon
On Wed, 8 Oct 2003, Iulian Musat wrote:
Hello everybody !
I have a project where I/O operations are going to take a significant amount of time, and I think that I could use asynchronous I/O to gain some CPU cycles while a read/write operation is on progress.
It will be grate if anyone can point me to some documentation about AIO on Linux? Does anyone know if this is working with the default kernel that comes with Redhat 8+ ?
Cheers, -Iulian
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