Joerg Sonnenberger wrote: > ... > (1) Introduce a dynamic version of libc_pg. > (2) Stop pretending that -pg means dynamic linking and implicitly add > -static. > (3) Stop pretending that -pg makes sense on modern hardware. > > Fundamentally, I think the third option is the correct way forward. > Sample based profiling with the default HZ setting just doesn't give > very useful results except for extremely long running processes -- you > get a sample every few million CPU cycles and want to extract something > useful from that? There are options for doing sample based profiling > without -pg. devel/gperftools provides one and doesn't require custom > builds of everything.
I wanted to vote for option 3 if we have better tools but devel/gperftools didn't build on my amd64 boxes (-current and -8): In file included from benchmark/getcontext_light.cc:2:0: benchmark/getcontext_light.cc: In function 'void getcontext_tramp(ucontext_t*)': benchmark/getcontext_light.cc:9:47: error: 'struct mcontext_t' has no member named 'gregs'; did you mean '__gregs'? Alex
