Check out http://www.ia.pw.edu.pl/~wujek/dokumentacja/gnu/libc/libc_8.html and pay attention to EAGAIN and O_NONBLOCK. Jon On Wed, 8 Oct 2003, Iulian Musat wrote: > Thanks. > > 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 > >> > >> > >>-- > >>redhat-list mailing list > >>unsubscribe mailto:redhat-list-request@xxxxxxxxxx?subject=unsubscribe > >>https://www.redhat.com/mailman/listinfo/redhat-list > >> > > > > > > > > > -- > redhat-list mailing list > unsubscribe mailto:redhat-list-request@xxxxxxxxxx?subject=unsubscribe > https://www.redhat.com/mailman/listinfo/redhat-list > -- redhat-list mailing list unsubscribe mailto:redhat-list-request@xxxxxxxxxx?subject=unsubscribe https://www.redhat.com/mailman/listinfo/redhat-list
