Commit-ID: 75d501171462d8624fd14a2baa474476d6745e95
Gitweb: https://git.kernel.org/tip/75d501171462d8624fd14a2baa474476d6745e95
Author: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
AuthorDate: Mon, 15 Jan 2018 10:39:55 -0300
Committer: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
CommitDate: Wed, 17 Jan 2018 10:23:32 -0300
perf trace: Setup DWARF callchains for non-syscall events when --max-stack is used
If we use:
perf trace --max-stack=4
then the syscall events will use DWARF callchains, when available
(libunwind enabled in the build) and the printing will stop at 4 levels.
When we introduced support for tracepoint events this ended up not
applying for them, fix it.
Before:
# perf trace --call-graph=dwarf --no-syscalls -e probe_libc:inet_pton ping -6 -c 1 ::1
PING ::1(::1) 56 data bytes
64 bytes from ::1: icmp_seq=1 ttl=64 time=0.058 ms
--- ::1 ping statistics ---
1 packets transmitted, 1 received, 0% packet loss, time 0ms
rtt min/avg/max/mdev = 0.058/0.058/0.058/0.000 ms
0.000 probe_libc:inet_pton:(7fc6c2a16350))
#
After:
# perf trace --call-graph=dwarf --no-syscalls -e probe_libc:inet_pton ping -6 -c 1 ::1
PING ::1(::1) 56 data bytes
64 bytes from ::1: icmp_seq=1 ttl=64 time=0.087 ms
--- ::1 ping statistics ---
1 packets transmitted, 1 received, 0% packet loss, time 0ms
rtt min/avg/max/mdev = 0.087/0.087/0.087/0.000 ms
0.000 probe_libc:inet_pton:(7fbf9a041350))
__inet_pton (inlined)
gaih_inet.constprop.7 (/usr/lib64/libc-2.26.so)
__GI_getaddrinfo (inlined)
[0xffffaa947cb67f3f] (/usr/bin/ping)
__libc_start_main (/usr/lib64/libc-2.26.so)
[0xffffaa947cb68379] (/usr/bin/ping)
#
Reported-by: Thomas Richter <tmricht@xxxxxxxxxxxxxxxxxx>
Cc: Adrian Hunter <adrian.hunter@xxxxxxxxx>
Cc: David Ahern <dsahern@xxxxxxxxx>
Cc: Hendrick Brueckner <brueckner@xxxxxxxxxxxxxxxxxx>
Cc: Jiri Olsa <jolsa@xxxxxxxxxx>
Cc: Namhyung Kim <namhyung@xxxxxxxxxx>
Cc: Wang Nan <wangnan0@xxxxxxxxxx>
Link: https://lkml.kernel.org/n/tip-afsu9eegd43ppihiuafhh9qv@xxxxxxxxxxxxxx
Signed-off-by: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
---
tools/perf/builtin-trace.c | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)
diff --git a/tools/perf/builtin-trace.c b/tools/perf/builtin-trace.c
index 0362974..ee85c29 100644
--- a/tools/perf/builtin-trace.c
+++ b/tools/perf/builtin-trace.c
@@ -2350,7 +2350,7 @@ static int trace__run(struct trace *trace, int argc, const char **argv)
goto out_delete_evlist;
}
- perf_evlist__config(evlist, &trace->opts, NULL);
+ perf_evlist__config(evlist, &trace->opts, &callchain_param);
signal(SIGCHLD, sig_handler);
signal(SIGINT, sig_handler);
@@ -3065,8 +3065,9 @@ int cmd_trace(int argc, const char **argv)
}
#ifdef HAVE_DWARF_UNWIND_SUPPORT
- if ((trace.min_stack || max_stack_user_set) && !callchain_param.enabled && trace.trace_syscalls)
+ if ((trace.min_stack || max_stack_user_set) && !callchain_param.enabled) {
record_opts__parse_callchain(&trace.opts, &callchain_param, "dwarf", false);
+ }
#endif
if (callchain_param.enabled) {
--
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