diff options
Diffstat (limited to 'tools/perf/builtin-trace.c')
| -rw-r--r-- | tools/perf/builtin-trace.c | 58 |
1 files changed, 32 insertions, 26 deletions
diff --git a/tools/perf/builtin-trace.c b/tools/perf/builtin-trace.c index 0b58e24c7ccb..dc7a694b61fe 100644 --- a/tools/perf/builtin-trace.c +++ b/tools/perf/builtin-trace.c @@ -1215,6 +1215,7 @@ struct trace { bool summary_only; bool show_comm; bool show_tool_stats; + bool trace_syscalls; int trace_pgfaults; }; @@ -1927,17 +1928,19 @@ static int trace__record(struct trace *trace, int argc, const char **argv) for (i = 0; i < ARRAY_SIZE(record_args); i++) rec_argv[j++] = record_args[i]; - for (i = 0; i < sc_args_nr; i++) - rec_argv[j++] = sc_args[i]; - - /* event string may be different for older kernels - e.g., RHEL6 */ - if (is_valid_tracepoint("raw_syscalls:sys_enter")) - rec_argv[j++] = "raw_syscalls:sys_enter,raw_syscalls:sys_exit"; - else if (is_valid_tracepoint("syscalls:sys_enter")) - rec_argv[j++] = "syscalls:sys_enter,syscalls:sys_exit"; - else { - pr_err("Neither raw_syscalls nor syscalls events exist.\n"); - return -1; + if (trace->trace_syscalls) { + for (i = 0; i < sc_args_nr; i++) + rec_argv[j++] = sc_args[i]; + + /* event string may be different for older kernels - e.g., RHEL6 */ + if (is_valid_tracepoint("raw_syscalls:sys_enter")) + rec_argv[j++] = "raw_syscalls:sys_enter,raw_syscalls:sys_exit"; + else if (is_valid_tracepoint("syscalls:sys_enter")) + rec_argv[j++] = "syscalls:sys_enter,syscalls:sys_exit"; + else { + pr_err("Neither raw_syscalls nor syscalls events exist.\n"); + return -1; + } } if (trace->trace_pgfaults & TRACE_PFMAJ) @@ -2010,10 +2013,13 @@ static int trace__run(struct trace *trace, int argc, const char **argv) goto out; } - if (perf_evlist__add_syscall_newtp(evlist, trace__sys_enter, trace__sys_exit)) + if (trace->trace_syscalls && + perf_evlist__add_syscall_newtp(evlist, trace__sys_enter, + trace__sys_exit)) goto out_error_tp; - perf_evlist__add_vfs_getname(evlist); + if (trace->trace_syscalls) + perf_evlist__add_vfs_getname(evlist); if ((trace->trace_pgfaults & TRACE_PFMAJ) && perf_evlist__add_pgfault(evlist, PERF_COUNT_SW_PAGE_FAULTS_MAJ)) @@ -2215,13 +2221,10 @@ static int trace__replay(struct trace *trace) if (evsel == NULL) evsel = perf_evlist__find_tracepoint_by_name(session->evlist, "syscalls:sys_enter"); - if (evsel == NULL) { - pr_err("Data file does not have raw_syscalls:sys_enter event\n"); - goto out; - } - if (perf_evsel__init_syscall_tp(evsel, trace__sys_enter) < 0 || - perf_evsel__init_sc_tp_ptr_field(evsel, args)) { + if (evsel && + (perf_evsel__init_syscall_tp(evsel, trace__sys_enter) < 0 || + perf_evsel__init_sc_tp_ptr_field(evsel, args))) { pr_err("Error during initialize raw_syscalls:sys_enter event\n"); goto out; } @@ -2231,13 +2234,9 @@ static int trace__replay(struct trace *trace) if (evsel == NULL) evsel = perf_evlist__find_tracepoint_by_name(session->evlist, "syscalls:sys_exit"); - if (evsel == NULL) { - pr_err("Data file does not have raw_syscalls:sys_exit event\n"); - goto out; - } - - if (perf_evsel__init_syscall_tp(evsel, trace__sys_exit) < 0 || - perf_evsel__init_sc_tp_uint_field(evsel, ret)) { + if (evsel && + (perf_evsel__init_syscall_tp(evsel, trace__sys_exit) < 0 || + perf_evsel__init_sc_tp_uint_field(evsel, ret))) { pr_err("Error during initialize raw_syscalls:sys_exit event\n"); goto out; } @@ -2440,6 +2439,7 @@ int cmd_trace(int argc, const char **argv, const char *prefix __maybe_unused) }, .output = stdout, .show_comm = true, + .trace_syscalls = true, }; const char *output_name = NULL; const char *ev_qualifier_str = NULL; @@ -2479,6 +2479,7 @@ int cmd_trace(int argc, const char **argv, const char *prefix __maybe_unused) "Show all syscalls and summary with statistics"), OPT_CALLBACK_DEFAULT('F', "pf", &trace.trace_pgfaults, "all|maj|min", "Trace pagefaults", parse_pagefaults, "maj"), + OPT_BOOLEAN(0, "syscalls", &trace.trace_syscalls, "Trace syscalls"), OPT_END() }; int err; @@ -2499,6 +2500,11 @@ int cmd_trace(int argc, const char **argv, const char *prefix __maybe_unused) if (trace.summary_only) trace.summary = trace.summary_only; + if (!trace.trace_syscalls && !trace.trace_pgfaults) { + pr_err("Please specify something to trace.\n"); + return -1; + } + if (output_name != NULL) { err = trace__open_output(&trace, output_name); if (err < 0) { |