From owner-freebsd-questions Fri Oct 19 13:14:56 2001 Delivered-To: freebsd-questions@freebsd.org Received: from cs.rpi.edu (mumble.cs.rpi.edu [128.213.8.16]) by hub.freebsd.org (Postfix) with ESMTP id C96F637B401 for ; Fri, 19 Oct 2001 13:14:54 -0700 (PDT) Received: from cs.rpi.edu (monica.cs.rpi.edu [128.213.7.2]) by cs.rpi.edu (8.9.3/8.9.3) with ESMTP id QAA35160 for ; Fri, 19 Oct 2001 16:14:54 -0400 (EDT) Message-Id: <200110192014.QAA35160@cs.rpi.edu> To: freebsd-questions@freebsd.org Subject: async isn't all that async? Date: Fri, 19 Oct 2001 16:14:53 -0400 From: "David E. Cross" Sender: owner-freebsd-questions@FreeBSD.ORG Precedence: bulk List-ID: List-Archive: (Web Archive) List-Help: (List Instructions) List-Subscribe: List-Unsubscribe: X-Loop: FreeBSD.ORG I was doing a profile recently between FreeBSD and Linux and I notice that FreeBSD's -o async really isn't that async. Specifically the Linux operation completed and then 15 seconds later the disk writes were committed, under FreeBSD many of the operations seemed to be waiting on disk (I ktraced, no mention of '-i sync' in anything... so no open options, to fcntl()s). Could someone shed a bit of light on this? -- David Cross | email: crossd@cs.rpi.edu Lab Director | Rm: 308 Lally Hall Rensselaer Polytechnic Institute, | Ph: 518.276.2860 Department of Computer Science | Fax: 518.276.4033 I speak only for myself. | WinNT:Linux::Linux:FreeBSD To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message