Messages in this thread | | | Date | Sun, 27 Feb 2005 19:05:17 +0000 | From | Neil <> | Subject | Yet another I/O modeling |
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hi,all select/poll I/O modeling is fast,easy to use,it returns the number of fd which are acitvity,but you should scan the fd array to find which fd is ready,it costs a lot of time on a heavy load server.
I proposal another I/O modeling,named eselect. struct eselect_struct{ unsigned long readbitmap[MAXBITMAPFD];//suppose the MAXBITMAPFD is MAX OPEN //FD NUMBER PER PROCESS int ret;//-1 on error,non-negative return value is the number of //acitvity fds } we can use __set_bit(),__clear_bit(),__find_first_bit()....functions to maintain the bitmap. So,you shouldnt scan the fd array any more.
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