On Sun, Feb 13, 2011 at 04:32:46PM -0600, DRC wrote: > So what exactly is a "default" Linux installation? I don't think anyone > can reasonably conclude that what is true for their Linux installation > is true for all Linux installations.
The performance problems are triggered by running running high performance applications like virtualgl, which is not part of any major distribution]. So any user of default installation of a major linux distribution has either an Xvnc without 3D support or is limited by the software renderer - they will not hit your test case. > I still don't fully buy that OpenGL isn't causing some amount of CPU > overhead that may still be limiting the frame rate, but I agree that a > 2D frame flipping benchmark would be a better test. The overhead is the same for None or TLSNone, as OpenGL is drawing into the frame buffer - TLS only affects the data transfer between Xvnc and vncviewer. > In the meantime, let's make the assumption that neither one of us is > mistaken and that there really is a difference in how our systems are > performing with GnuTLS. The only explanation I can come up with for > that is that our versions of GnuTLS were built differently. Perhaps > there is some performance feature that is enabled in yours but not mine? > I've tried building against the GnuTLS chain that is on RHEL 4, as well > as downloading the latest & greatest (GnuTLS 2.10.4) chain and building > it from source, and I get identical results. I'm only using the precompiled libraries from my Debian distribution. They all should have been upgraded to Squeeze, but I can't guarantee, that there is something left from an older releases. > When you are running your tests, are you using the binaries I built and > uploaded, or are you using your binaries, which are presumably built > against the system installation of GnuTLS? If you haven't tried my > binaries, please try them. That will tell us whether the above > hypothesis is correct. I have downloaded your 64 bit binaries, but can not test, as Xvnc does not support the GLX extension [(EE) AIGLX error: dlopen of /tmp/tigerbuild.c27921/tigervnc-1.0.90/linux64/xorg.build/lib/dri/swrast_dri.so failed]. > Also, I was using TLSVnc, not TLSNone, but that shouldn't make a > difference, right? Yes, this should not make any difference - TLSVnc only adds the password exchange, but after that, the protocol is the same. Regards, Martin Kögler ------------------------------------------------------------------------------ The ultimate all-in-one performance toolkit: Intel(R) Parallel Studio XE: Pinpoint memory and threading errors before they happen. Find and fix more than 250 security defects in the development cycle. Locate bottlenecks in serial and parallel code that limit performance. http://p.sf.net/sfu/intel-dev2devfeb _______________________________________________ Tigervnc-devel mailing list Tigervnc-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/tigervnc-devel
