On Sat, Oct 29, 2016 at 5:43 PM, Christopher Hansen <hanse...@gmail.com> wrote: > OK, I found my problem and I fixed it. I had a "bad PPA" I needed to remove > in order for the update_kernal.sh script to complete properly. Here's what I > get from the example code: > > This example computes y[i] = M[i] * x[i] + C on single precision floating > point arrays of size 2097152 > - Computation on the ARM is parallelized across the A15s using OpenMP. > - Computation on the DSP is performed by dispatching an OpenCL NDRange kernel > across the compute units (C66x cores) in the compute device. > > Running..... > > Average across 5 runs: > ARM (2 OpenMP threads) : 0.007877 secs > DSP (OpenCL NDRange kernel) : 0.007614 secs > OpenCL-DSP speedup : 1.034475 > > > Is that the expected result?
Yeah, i was getting around 1.1x on v4.4.x When i last tried ti's sdk (v4.4.x based on the Alpha -X15 (no support for the rev b yet)) i was getting around 0.7/0.8 "speedup"... Back in v4.1.x (about a year ago, with the alpha-x15) i thought it was around 3x/4x speedup So there's definitely a speed regression, (maybe we are in a slow clock state for the dsp?) But it atleast it's working again... ;) Regards, -- Robert Nelson https://rcn-ee.com/ -- For more options, visit http://beagleboard.org/discuss --- You received this message because you are subscribed to the Google Groups "BeagleBoard" group. To unsubscribe from this group and stop receiving emails from it, send an email to beagleboard+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/beagleboard/CAOCHtYgddimrvwV-CDEtz3shgpCo8ioSbCGVYygddG1SLb7DSA%40mail.gmail.com. For more options, visit https://groups.google.com/d/optout.
