From mboxrd@z Thu Jan 1 00:00:00 1970 From: Anthony PERARD Subject: Re: [PATCH] libxl: Increase device model startup timeout to 1min. Date: Mon, 29 Jun 2015 17:09:19 +0100 Message-ID: <20150629160919.GC1891@perard.uk.xensource.com> References: <1435319840-25020-1-git-send-email-anthony.perard@citrix.com> <1435336867.32500.209.camel@citrix.com> <20150629142317.GB1891@perard.uk.xensource.com> <1435589517.32500.342.camel@citrix.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: Content-Disposition: inline In-Reply-To: <1435589517.32500.342.camel@citrix.com> List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Sender: xen-devel-bounces@lists.xen.org Errors-To: xen-devel-bounces@lists.xen.org To: Ian Campbell Cc: Wei Liu , Stefano Stabellini , Ian Jackson , xen-devel@lists.xen.org List-Id: xen-devel@lists.xenproject.org On Mon, Jun 29, 2015 at 03:51:57PM +0100, Ian Campbell wrote: > On Mon, 2015-06-29 at 15:23 +0100, Anthony PERARD wrote: > > On Fri, Jun 26, 2015 at 05:41:07PM +0100, Ian Campbell wrote: > > > On Fri, 2015-06-26 at 12:57 +0100, Anthony PERARD wrote: > > > > On a busy host, QEMU may take more than 10s to start. > > > > > > Please show your working here so that in 2 years when we want to know > > > why this value was chosen we don't have to go scrobbling around in the > > > ML archives looking for the data you gathered. > > > > OK. What about: > > I'm afraid none of that really explains why QEMU taking >10s is > reasonable/expected under the circumstances or why 60s is a good choice > now. > > Nor does it really answer Ian's question in > <21901.33163.547929.321814@mariner.uk.xensource.com> I think. I only know what happen, not why it happen. How could I investigate why qemu is taking so long after an mmap() syscall? I guest at that time, it is copying the library into memory. -- Anthony PERARD