Date: Mon, 30 Apr 2001 06:49:03 -0700 From: Alfred Perlstein <bright@wintelcom.net> To: =?iso-8859-1?Q?=AAL=AD^=B6W?= <r88074@csie.ntu.edu.tw> Cc: Freebsd-Hackers <freebsd-hackers@FreeBSD.ORG> Subject: Re: write() vs aio_write() Message-ID: <20010430064903.B18676@fw.wintelcom.net> In-Reply-To: <200104301340.VAA25665@cslab.csie.ntu.edu.tw>; from r88074@csie.ntu.edu.tw on Mon, Apr 30, 2001 at 09:39:43PM %2B0800 References: <20010430063101.Z18676@fw.wintelcom.net> <200104301340.VAA25665@cslab.csie.ntu.edu.tw>
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* ªL^¶W <r88074@csie.ntu.edu.tw> [010430 06:47] wrote: > > * ªL^¶W <r88074@csie.ntu.edu.tw> [010430 06:17] wrote: > > Dear all: > > > > Because write() use buffer cache, I want to know whether aio_write() > is > > better than write() in FreeBSD 4.1 . Is aio_write() > > > > outperform write() ? Or any related performance comparison between the > two > > system call ???? > > aio_write is for doing async aio. meaning you can ask the kernel to > move data for you from a memory location to a file descriptor while > you proceed on with doing other work. if you don't have any other > work to do then aio is probably just going to slow you down. > > > Now I am trying to implement a Proxy Server. I want to use asynchrounos I/O > so that > the Proxy Server can do other things than blocking on I/O operation. Is it a > good idea to > use aio_write or aio_read on Proxy Server ??? It's a good idea to use it for disk IO, probably not a good idea for network IO. -- -Alfred Perlstein - [alfred@freebsd.org] Daemon News Magazine in your snail-mail! http://magazine.daemonnews.org/ To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message
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