On 22/09/14 01:03 PM, DRC wrote: > On 9/8/14 8:40 PM, Nathan Kidd wrote: >> I'd like to eventually understand why the SEGV in 3 occurs (presumably >> bad buffer interaction between VGL and VP), but this isn't high on my >> list since a) VGL_READBACK=sync works, and b) I'm quite used by now, to >> saying "ViewPerf is a GPU benchmark, it doesn't make much sense to run >> it in any kind of remote setting." > > Yes and no. If frame spoiling is enabled, then no OpenGL benchmark is > useful in a remote setting, but if you disable spoiling, then you can > use the benchmark to get some sense of how the remote solution might > perform under a real application workload. The thing that most casual > users don't understand, however, is that what they're really testing is > the remote solution's ability to compress and transmit the images > generated by the benchmark. The GPU performance is probably not > factoring into the results. So in a sense, yes, the benchmark is not > being used for its intended purpose, but it is still useful-- as long as > it is being used to compare different remote solutions, as opposed to > trying to compare remote vs. local.
What my comments are usually directed at is the caveat "as long as it is being used to compare different remote solutions *and you know for sure you are not GPU bottlenecked*". If you know your GPU isn't the bottleneck then, sure, it could make sense. > When I worked for Sun, it seemed > like I had to spend 1/3 of my time explaining to people why comparing > benchmarks in a remote vs. local setting is kind of like trying to > compare the performance of a sports car and a telephone. Now just imagine adding indirect rendering to the mix. "Rendering OpenGL on the server sucks because I only get 60fps, but when I run with indirect rendering I get 600fps". Queue explanations of immediate mode rendering, etc. :) -Nathan ------------------------------------------------------------------------------ Meet PCI DSS 3.0 Compliance Requirements with EventLog Analyzer Achieve PCI DSS 3.0 Compliant Status with Out-of-the-box PCI DSS Reports Are you Audit-Ready for PCI DSS 3.0 Compliance? Download White paper Comply to PCI DSS 3.0 Requirement 10 and 11.5 with EventLog Analyzer http://pubads.g.doubleclick.net/gampad/clk?id=154622311&iu=/4140/ostg.clktrk _______________________________________________ VirtualGL-Devel mailing list VirtualGL-Devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/virtualgl-devel
