Em Tue, Jan 16, 2018 at 04:27:52PM +0100, Thomas-Mich Richter escreveu: > --- ::1 ping statistics --- > 1 packets transmitted, 1 received, 0% packet loss, time 0ms > rtt min/avg/max/mdev = 0.047/0.047/0.047/0.000 ms > 0.000 probe_libc:inet_pton:(3ffb4bc2060)) > [root@s8360047 perf]# > > Test fails, I would have expected some callchain output. > > [root@s8360047 perf]# ./perf trace --no-syscalls --call-graph dwarf > --max-stack 4 > -e probe_libc:inet_pton/max-stack=3/ ping -6 -c 1 ::1 > PING ::1(::1) 56 data bytes > 64 bytes from ::1: icmp_seq=1 ttl=64 time=0.055 ms > > --- ::1 ping statistics --- > 1 packets transmitted, 1 received, 0% packet loss, time 0ms > rtt min/avg/max/mdev = 0.055/0.055/0.055/0.000 ms > 0.000 probe_libc:inet_pton:(3ff7e6c2060)) > [root@s8360047 perf]# > > Test fails, I would have expected some callchain output. > > It looks like /max-stack=3/ without ,call-graph=dwarf > does not trigger the stack unwinding.
Ok, will work on those, then redo all the tests you did, grr, tricky stuff. - Arnaldo
