From owner-freebsd-current Wed Nov 8 14:15:18 1995 Return-Path: owner-current Received: (from root@localhost) by freefall.freebsd.org (8.6.12/8.6.6) id OAA23071 for current-outgoing; Wed, 8 Nov 1995 14:15:18 -0800 Received: from who.cdrom.com (who.cdrom.com [192.216.222.3]) by freefall.freebsd.org (8.6.12/8.6.6) with ESMTP id OAA23063 for ; Wed, 8 Nov 1995 14:15:14 -0800 Received: from devnull.mpd.tandem.com ([131.124.4.29]) by who.cdrom.com (8.6.12/8.6.11) with ESMTP id OAA05042 for ; Wed, 8 Nov 1995 14:15:07 -0800 Received: from olympus by devnull.mpd.tandem.com (8.6.8/8.6.6) id QAA28866; Wed, 8 Nov 1995 16:12:15 -0600 Received: by olympus (4.1/TSS2.1) id AA25168; Wed, 8 Nov 95 16:12:24 CST From: faulkner@mpd.tandem.com (Boyd Faulkner) Message-Id: <9511082212.AA25168@olympus> Subject: iozone and mount -o async To: current@freebsd.org Date: Wed, 8 Nov 1995 16:12:23 -0600 (CST) X-Mailer: ELM [version 2.4 PL17] Content-Type: text Content-Length: 952 Sender: owner-current@freebsd.org Precedence: bulk Can you test the fs mounted async with iozone? I am getting a slowdown mounted async! With my Maxtor 235M SCSI 1 drive mounted normally iozone 32 gives Writing the 32 Megabyte file, 'iozone.tmp'...41.687500 seconds Reading the file...30.148438 seconds IOZONE performance measurements: 804903 bytes/second for writing the file 1112974 bytes/second for reading the file mounted with -o async Writing the 32 Megabyte file, 'iozone.tmp'...46.992188 seconds Reading the file...30.078125 seconds IOZONE performance measurements: 714042 bytes/second for writing the file 1115575 bytes/second for reading the file The drive is on an NCR SCSI controller on my ASUS PCI/SP3G 486 DX4 100 system. Hmmm. -- _______________________________________________________________________ Boyd Faulkner - faulkner@isd.tandem.com - http://cactus.org/~faulkner _______________________________________________________________________