From mboxrd@z Thu Jan 1 00:00:00 1970 Message-ID: <4A325746.3060601@domain.hid> Date: Fri, 12 Jun 2009 15:25:26 +0200 From: Jan Kiszka MIME-Version: 1.0 References: <634c78ce0906120240t694ded8cpfa7fcd9dfb2c3b8@domain.hid> <200906121148.37732.smolorz@domain.hid> <4A3235BF.5090201@domain.hid> <4A324D3D.9060505@domain.hid> <4A325189.5060905@domain.hid> <4A325520.5000809@domain.hid> In-Reply-To: <4A325520.5000809@domain.hid> Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Subject: Re: [Xenomai-help] Running Xenomai in a virtual machine List-Id: Help regarding installation and common use of Xenomai List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: Gilles Chanteperdrix Cc: xenomai@xenomai.org Gilles Chanteperdrix wrote: > Jan Kiszka wrote: >> Johan Visser wrote: >>> VMware runs, but gives heavy CPU load ( about 38 % ) instead of 6-8 % on >>> a real system. >> That's expected if your CPU actually lacks hardware virtualization. > > An idle guest used to consume almost nothing on a vmware host. Only > MS-DOS needed a special TSR to have its idle mode not consume 100%. On > the other hand, the last time I used vmware was 5 years ago... I meant the scale is expected: If basically the same system runs with some non-zero load on real hw, the load that this machine inside a code-translating hypervisor like vmware causes to its host will be noticeably larger. But even the idle load can be noteworthy if I/O emulation causes a lot of host activities, even with HVM. Jan -- Siemens AG, Corporate Technology, CT SE 2 Corporate Competence Center Embedded Linux