From owner-freebsd-hackers Mon Jul 14 14:00:15 1997 Return-Path: Received: (from root@localhost) by hub.freebsd.org (8.8.5/8.8.5) id OAA13972 for hackers-outgoing; Mon, 14 Jul 1997 14:00:15 -0700 (PDT) Received: from isbalham.ist.co.uk (isbalham.ist.co.uk [192.31.26.1]) by hub.freebsd.org (8.8.5/8.8.5) with ESMTP id OAA13930; Mon, 14 Jul 1997 14:00:01 -0700 (PDT) Received: from gid.co.uk (uucp@localhost) by isbalham.ist.co.uk (8.8.4/8.8.4) with UUCP id VAA11169; Mon, 14 Jul 1997 21:43:10 +0100 (BST) Received: from [194.32.164.2] by seagoon.gid.co.uk; Mon, 14 Jul 1997 21:42:00 +0100 X-Sender: rb@194.32.164.1 Message-Id: In-Reply-To: <199707141751.LAA02683@Ilsa.StevesCafe.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Date: Mon, 14 Jul 1997 21:38:11 +0100 To: Steve Passe From: Bob Bishop Subject: Re: interrupt latency Cc: hackers@FreeBSD.ORG, smp@FreeBSD.ORG Sender: owner-hackers@FreeBSD.ORG X-Loop: FreeBSD.org Precedence: bulk At 18:51 +0100 14/7/97, Steve Passe wrote: >Hi, > >Can anyone recommend a test suite/methodology for evaluating interrupt >latency? >I have some ideas for improving the (currently poor) int response of the SMP >kernel, but need a way to determine if I am actually bettering things. A digital output port and an oscilloscope, logic analyser or something similar. Any other (ie non-hardware) method is just inviting confusion. -- Bob Bishop (0118) 977 4017 international code +44 118 rb@gid.co.uk fax (0118) 989 4254 between 0800 and 1800 UK