From owner-freebsd-questions@freebsd.org  Wed Jan 13 14:23:19 2016
Return-Path: <owner-freebsd-questions@freebsd.org>
Delivered-To: freebsd-questions@mailman.ysv.freebsd.org
Received: from mx1.freebsd.org (mx1.freebsd.org
 [IPv6:2001:1900:2254:206a::19:1])
 by mailman.ysv.freebsd.org (Postfix) with ESMTP id A65C8A80115
 for <freebsd-questions@mailman.ysv.freebsd.org>;
 Wed, 13 Jan 2016 14:23:19 +0000 (UTC)
 (envelope-from smithi@nimnet.asn.au)
Received: from sola.nimnet.asn.au (paqi.nimnet.asn.au [115.70.110.159])
 (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits))
 (Client did not present a certificate)
 by mx1.freebsd.org (Postfix) with ESMTPS id 2FD221C36
 for <freebsd-questions@freebsd.org>; Wed, 13 Jan 2016 14:23:18 +0000 (UTC)
 (envelope-from smithi@nimnet.asn.au)
Received: from localhost (localhost [127.0.0.1])
 by sola.nimnet.asn.au (8.14.2/8.14.2) with ESMTP id u0DENFRc021048;
 Thu, 14 Jan 2016 01:23:15 +1100 (EST)
 (envelope-from smithi@nimnet.asn.au)
Date: Thu, 14 Jan 2016 01:23:15 +1100 (EST)
From: Ian Smith <smithi@nimnet.asn.au>
To: "darwinsurvivor@gmail.com" <darwinsurvivor@gmail.com>
cc: kpneal@pobox.com, "William A. Mahaffey III" <wam@hiwaay.net>,
 freebsd-questions@freebsd.org
Subject: Re: Task to busy one CPU 100% for a period of time?
In-Reply-To: <20160114000637.U93547@sola.nimnet.asn.au>
Message-ID: <20160114010606.X93547@sola.nimnet.asn.au>
References: <20160111002439.Q93547@sola.nimnet.asn.au>
 <56928802.2040802@hiwaay.net>
 <20160111154616.G93547@sola.nimnet.asn.au>
 <20160111203832.GC88498@neutralgood.org>
 <20160113052558.R93547@sola.nimnet.asn.au>
 <CAMuYtRDoKfGC0awAon1+BmUKsj6ugau-umgzCiR8MpbA37QTgQ@mail.gmail.com>
 <20160114000637.U93547@sola.nimnet.asn.au>
MIME-Version: 1.0
Content-Type: TEXT/PLAIN; charset=US-ASCII
X-BeenThere: freebsd-questions@freebsd.org
X-Mailman-Version: 2.1.20
Precedence: list
List-Id: User questions <freebsd-questions.freebsd.org>
List-Unsubscribe: <https://lists.freebsd.org/mailman/options/freebsd-questions>, 
 <mailto:freebsd-questions-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/freebsd-questions/>
List-Post: <mailto:freebsd-questions@freebsd.org>
List-Help: <mailto:freebsd-questions-request@freebsd.org?subject=help>
List-Subscribe: <https://lists.freebsd.org/mailman/listinfo/freebsd-questions>, 
 <mailto:freebsd-questions-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Wed, 13 Jan 2016 14:23:19 -0000

On Thu, 14 Jan 2016 00:57:58 +1100, Ian Smith wrote:

 > echo "`date` $me running $tasks load1 tasks for ${secs}s"
 > bgpids=''
 > done=0; trap "done=1; sleep=0" int quit term

Oops, s/sleep/secs/ .. only added for extremely unlikely case one might 
hit ^C during starting up the load1 task/s, so untested.

 > while [ $done -eq 0 ]; do
 > 	while [ $tasks -gt 0 ]; do
 > 		~/bin/load1 &
 > 		bgpids="$bgpids $!"
 > 	tasks=$((tasks-1))
 > 	done
 > 	sleep $secs
 > 	done=1
 > done

And a missed tab .. too darn hot tonight :)

cheers, Ian