On Thu, 2011-06-30 at 10:10 +0300, Yaniv Kaul wrote: > On 06/30/2011 05:33 AM, John A. Sullivan III wrote: > > On Wed, 2011-06-29 at 20:22 -0400, Andrew Cathrow wrote: > >> > >> ----- Original Message ----- > >>> <snip> > >>> Hello, all. I've been using both RDP via TSPlus and SPICE for over a > >>> week now and the practical world results at least in my mode of > >>> operation are becoming clear. SPICE does handle major screen refreshes > >>> better, e.g., monstrous graphics or continuously pasting a full line > >>> of > >>> text in a full screen notepad. Of course, SPICE is a clear winner when > >>> it comes to video though still not practically usable on low bandwidth > >>> links. > >>> > >>> However, RDP is trouncing SPICE in the more common day to day tasks > >>> involving small screen updates. For example, every time I open or > >>> switch > >>> my screen to LibreOffice, the tool bar icons seems to pain one at a > >>> time > >>> in SPICE where as they appear all at once in TSPlus. Document > >>> scrolling > >>> is more immediate and smoother. Surprisingly, when I open the PuTTY > >>> dialog in SPICE, it paints in sections whereas TSPlus appears all at > >>> once. > >> You'll really need to post some real details here - from versions of > >> qemu+spice server that you're using along with the qemu command line > >> syntax, host OS, hardware details through to what's running in the guest, > >> driver versions, etc. > >> > >> I've never seen RDP trounce spice, but if it does, then we need some > >> scientific information on the environment so we can diagnose and assist. > >> > > <snip> > > Very happy to do so as we really do want SPICE to become our protocol of > > choice. I believe I've posted up our details before but will do so > > again. > > Would you be so kind as to capture the Spice traffic (using > tcpdump/wireshark) and send it over? > Specifically: > 1. Please capture from start - before the Spice client connects to the > server. > 2. Ensure you catch full sized packets (-s XXXX - could be 1500 most > likely, when using tcpdump) > 3. Save into file (-w /tmp/file.pcap when using tcpdump) > 4. Please compress and send / let me know where I can pick it up from. > > I suggest you have only the scenario of connecting to the VM and opening > putty, which you complain is slow. > Hopefully it'll give us some clue. > TIA, > Y. <snip> Certainly. On their way in a couple of moments. If anyone else would like a copy, please let me know off list.
I took three traces. The first was our regular SPICE connection. Then I took a trace performing the same activities using xfreerdp and TSPlus. Once again, it was much more responsive and it transferred roughly 1/5th of the data SPICE did. I also noticed it said it did not support 32 bit pixel depth and reverted to 16 although it looked much better than 16. I then thought, our iSCSI disk access is slow so maybe it was a matter that all the data was now cached plus the 16 vs 32 bit pixel depth, so I took another SPICE trace with color-depth=16. It was still much slower and transferred many times the amount of data. I'll paste in the timing notes that are included in the trace tarball. One can get a anecdotal sense of how much snappier RDS is from the time lines on doing the exact same activities: SPICEStart-20110630 sequence 0 seconds: start spicec --host 172.x.x.124 --port 5900 --color-depth 32 -to previously painted screen 20: toggle to full screen 45: display desktop, i.e., minimize all open applications 64: Open PuTTY 81: Paint existing LibreOffice document, i.e., restore from minimize 104: Start new LibreOffice application after closing previous one 120: Open LibreOffice document (slowly paints toolbar icons) 136: toggle away from full screen Total bytes transfered: 2,687,446 TSPlusStart-20110630 sequence 0 seconds: start xfreerdp -d MyDomain -a 32 -x lan -z -u myid -f --plugin cliprdr --plugin rdpsnd 172.29.1.133 & - said it did not support 32 bit pixel depth and reverted to 16 although it looked much better than 16 bit 7: login 17: display desktop, i.e., minimize all open applications 28: Open PuTTY 42: Paint existing LibreOffice document, i.e., restore from minimize 58: Start new LibreOffice application after closing previous one 75: Open LibreOffice document (slowly paints toolbar icons) 85: toggle away from full screen Total bytes transfered: 562242 SPICEStart-16-20110630 sequence 0 seconds: start spicec --host 172.x.x.124 --port 5900 --color-depth 16 (Warning: no factory for 8 - I don't know what that message means) 15: toggle to full screen 39: login 61: display desktop, i.e., minimize all open applications 75: Open PuTTY 92: Paint existing LibreOffice document, i.e., restore from minimize 114: Start new LibreOffice application after closing previous one 138: Open LibreOffice document (slowly paints toolbar icons) 153: toggle away from full screen Total bytes transfered: 3643123 (I assume this is higher than 32bit because of the screen resolution detection when logging in) _______________________________________________ Spice-devel mailing list Spice-devel@lists.freedesktop.org http://lists.freedesktop.org/mailman/listinfo/spice-devel
