diff options
Diffstat (limited to 'tools/perf/builtin-trace.c')
| -rw-r--r-- | tools/perf/builtin-trace.c | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/tools/perf/builtin-trace.c b/tools/perf/builtin-trace.c index 63a3cc9..cfa5ce8 100644 --- a/tools/perf/builtin-trace.c +++ b/tools/perf/builtin-trace.c @@ -159,6 +159,7 @@ struct trace { bool show_comm; bool show_tool_stats; bool trace_syscalls; + bool kernel_syscallchains; bool force; bool vfs_getname; int trace_pgfaults; @@ -2661,6 +2662,15 @@ static int trace__add_syscall_newtp(struct trace *trace) perf_evlist__add(evlist, sys_enter); perf_evlist__add(evlist, sys_exit); + if (trace->opts.callgraph_set && !trace->kernel_syscallchains) { + /* + * We're interested only in the user space callchain + * leading to the syscall, allow overriding that for + * debugging reasons using --kernel_syscall_callchains + */ + sys_exit->attr.exclude_callchain_kernel = 1; + } + trace->syscalls.events.sys_enter = sys_enter; trace->syscalls.events.sys_exit = sys_exit; @@ -3221,6 +3231,7 @@ int cmd_trace(int argc, const char **argv, const char *prefix __maybe_unused) .output = stderr, .show_comm = true, .trace_syscalls = true, + .kernel_syscallchains = false, }; const char *output_name = NULL; const char *ev_qualifier_str = NULL; @@ -3269,6 +3280,8 @@ int cmd_trace(int argc, const char **argv, const char *prefix __maybe_unused) OPT_CALLBACK(0, "call-graph", &trace.opts, "record_mode[,record_size]", record_callchain_help, &record_parse_callchain_opt), + OPT_BOOLEAN(0, "kernel-syscall-graph", &trace.kernel_syscallchains, + "Show the kernel callchains on the syscall exit path"), OPT_UINTEGER(0, "proc-map-timeout", &trace.opts.proc_map_timeout, "per thread proc mmap processing timeout in ms"), OPT_END() |