On 16 January 2018 at 18:19, Dave Watson <davejwat...@fb.com> wrote: > On 01/16/18 09:34 AM, Luke Diamand wrote: >> On 16 January 2018 at 03:33, Luke Diamand <l...@diamand.org> wrote: >> > Hi! >> > >> > I could be wrong about this, but I'm finding a roughly 10x slowdown on >> > ARM between 1.2.1 and current HEAD (e1ca8748). >> > >> > I have a small test program here: >> > >> > https://gist.github.com/luked99/7c67d94da5c33cac5a1b41a500013355 > > I think there is a similar perf test program under tests/, 'make perf' >
I tried Lperf-trace. On 1.2.1 I get this output from my RPI2: $ time Lperf-trace unw_getcontext : cold avg= 219.345 nsec, warm avg= 119.209 nsec unw_init_local : cold avg= 5741.119 nsec, warm avg= 5378.723 nsec no cache : unw_step : 1st=32499.151 min=13745.056 avg=14395.800 nsec global cache : unw_step : 1st=13904.751 min=13754.053 avg=14391.024 nsec per-thread cache: unw_step : 1st=13972.228 min=13754.053 avg=14396.393 nsec 52.73user 0.48system 0:53.22elapsed 99%CPU (0avgtext+0avgdata 68056maxresident)k 0inputs+0outputs (0major+16761minor)pagefaults 0swaps With 1.3 (e1ca8748) it produced the first two lines: unw_getcontext : cold avg= 238.419 nsec, warm avg= 119.209 nsec unw_init_local : cold avg= 5288.124 nsec, warm avg= 4880.428 nsec default : unw_step : 1st=248018.301 min=185678.590 avg=191420.175 nsec but then is either very slow, or is stuck. I killed it after about 5 minutes. _______________________________________________ Libunwind-devel mailing list Libunwind-devel@nongnu.org https://lists.nongnu.org/mailman/listinfo/libunwind-devel
