Date: Sat, 2 Aug 1997 16:02:09 -0700 (MST) From: Terry Lambert <terry@lambert.org> To: gpalmer@FreeBSD.ORG (Gary Palmer) Cc: hackers@FreeBSD.ORG Subject: Re: non-blocking file i/o Message-ID: <199708022302.QAA00445@phaeton.artisoft.com> In-Reply-To: <7776.870502484@orion.webspan.net> from "Gary Palmer" at Aug 2, 97 02:14:44 am
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> A friend (who mainly does his devel under solaris/linux) recently came > up with a patch to the INN database code which made the writes > non-blocking. On linux/solaris, the non-blocking writes would take > fractions of a ms. On FreeBSD, the blocking write took 8ms and the > ``non-blocking'' write took 4ms (set using fcntl). It also seems that > Linux and Solaris use open(file, O_NONBLOCK, 0) to put the file into > non-blocking mode for reading and writing also, where our open flag > only affects the open. Are you confusion O_NONBLOCK with O_NDELAY? It used to be on SysV systems that O_NDELAY was "open without waiting for DCD on modem control devices" and *also* put the device into non-blocking mode. Terry Lambert terry@lambert.org --- Any opinions in this posting are my own and not those of my present or previous employers.
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