On Thu, Jun 23, 2011 at 3:35 AM, Jon Povey <[email protected]> wrote: > Hi folks, > > I am working on a video recording app on DM365, using DVSDK 4.02 > which means kernel 2.6.32. > > Anyone got any advice on how to trace latency issues on this kernel? > I was hoping to use tools/perf, but it's not supported for ARM on > this old kernel it seems. > > I want to see what is going on when my process stalls so I can look > at things like user+kernel thread priorities, threaded ISRs etc. to > meet realtime deadlines. > > Kprobes maybe? There are various historical performance analysis tools > that seem to have come and gone for Linux, any tips that can save me > wasting time looking into less useful ones would be welcome. > > Related, I'd be interested to know how possible it is to use DMAI etc. > on top of the current mainline kernel, or what's missing. For now I'm > sticking with the TI DVSDK+PSP bundle but might want to change kernels > before too long. Maybe I should ask that separately, later.
Hell Jon, I debug a video stall problem on DaVinci a few years ago, and I used LTTng. Regards, Steve _______________________________________________ Davinci-linux-open-source mailing list [email protected] http://linux.davincidsp.com/mailman/listinfo/davinci-linux-open-source
