Hi Allan,
thanks for the prompt reply. >>> QtWebKit/fancybrowser doesn't do anything on it own, only when instructed >>> by the user or web-site is any traffic initiated. Understood - it must/could be the QWebView that the example is using. But even starting the browser with no URL (i.e. not the default <http://www.qt-project.org>) is showing that issue (presumably wifi only) Reply from: bytes=32 time=1ms TTL=127 Reply from: bytes=32 time=1ms TTL=127 Reply from: bytes=32 time=1ms TTL=127 Reply from: bytes=32 time<1ms TTL=127 ->Reply from: bytes=32 time=74ms TTL=127 ->Reply from: bytes=32 time=18ms TTL=127 ->Reply from: bytes=32 time=12ms TTL=127 Reply from: bytes=32 time<1ms TTL=127 Reply from: bytes=32 time=82ms TTL=127 Reply from: bytes=32 time=76ms TTL=127 Reply from: bytes=32 time=1ms TTL=127 Reply from: bytes=32 time=1ms TTL=127 Reply from: bytes=32 time=1ms TTL=127 Reply from: bytes=32 time=2ms TTL=127 Reply from: bytes=32 time=1ms TTL=127 ->Reply from: bytes=32 time=115ms TTL=127 ->Reply from: bytes=32 time=109ms TTL=127 ->Reply from: bytes=32 time=52ms TTL=127 and so on... >>> Start by logging the network traffic and see what it is I've done that already but I didn't spot anything obvious. Will have to go back, I guess ;-) I'm not the network expert, obviously, but could it be that Qt somewhere queries the network stack / driver /adapter or whatever which causes the IO to hang, i.e. no traffic is actually sent / received at all by the Qt app? But that periodic check or query just causes the adapter to delay the network IO? Maybe somewhere in the QNetworkManager(Engine/Service) classes? Thanks, Andre -----Original Message----- From: Allan Sandfeld Jensen [mailto:carew...@gmail.com] On Behalf Of Allan Sandfeld Jensen Sent: Thursday, January 29, 2015 12:43 AM To: interest@qt-project.org Cc: Andre Barth Subject: Re: [Interest] Running FancyBrowser / QtWebKit example causes periodical wifi network delay & VOIP interruption, Qt 5.3.2, Windows 7 x64 On Wednesday 28 January 2015, Andre Barth wrote: > Hi all, > > When running the Fancybrowser example from the Qt 5.3.2 SDK I'm > experiencing a periodical delay in transmitting network data over my > wifi connection. > > Doing a parallel [ping -t] to another machine inside the same > subnetwork shows a spike-like increase of the ping time every 5 > seconds or so. We cannot use voip / lync whilst the Qt-application is > running due to the constant break-up of the data transmission. > > Any ideas which area in the Webkit(?) code base might be causing that > and/or where to best start looking? > Start by logging the network traffic and see what it is. Also if you believe it is QtWebKit you should check what website causes it. QtWebKit/fancybrowser doesn't do anything on it own, only when instructed by the user or web-site is any traffic initiated. Best regards `Allan
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