On 04/04/2017 02:34 PM, Rob Clark wrote: > On Tue, Apr 4, 2017 at 1:49 AM, Thomas Hellstrom <thellst...@vmware.com> > wrote: >> But one more worrying thing is that with these fixes, debug_flush gets >> too slow to be usable. I get about one frame every 5 seconds from Ubuntu >> compiz. The culprit seems to be unw_get_proc_name(). Is there a way we >> can save intermediate information during backtrace capture and call this >> function at printout time? > > btw, is it common to capture many more backtraces than you print? > (Just to check if defering the unw_get_proc_name() would actually help > anything..)
Yes. The debug_flush functionality captures the backtrace on each map in case someone would flush when mapped or try a recursive map. Only then they are printed. FWIW in u_debug_symbol.c, José has implemented a hash table for name lookups. Perhaps one solution would to save the IP and insert the function name in the hash table with the IP as key. /Thomas > > BR, > -R _______________________________________________ mesa-dev mailing list mesa-dev@lists.freedesktop.org https://lists.freedesktop.org/mailman/listinfo/mesa-dev
