diff options
| -rw-r--r-- | tools/perf/Documentation/perf-trace.txt | 4 | ||||
| -rw-r--r-- | tools/perf/builtin-trace.c | 12 |
2 files changed, 12 insertions, 4 deletions
diff --git a/tools/perf/Documentation/perf-trace.txt b/tools/perf/Documentation/perf-trace.txt index 4754f11a862..fe19811faf9 100644 --- a/tools/perf/Documentation/perf-trace.txt +++ b/tools/perf/Documentation/perf-trace.txt @@ -49,6 +49,10 @@ OPTIONS --uid=:: Record events in threads owned by uid. Name or number. +-v:: +--verbose=:: + Verbosity level. + -i:: --no-inherit:: Child tasks do not inherit counters. diff --git a/tools/perf/builtin-trace.c b/tools/perf/builtin-trace.c index 6ab7a7a5e66..c907e7e41a7 100644 --- a/tools/perf/builtin-trace.c +++ b/tools/perf/builtin-trace.c @@ -1,6 +1,7 @@ #include <traceevent/event-parse.h> #include "builtin.h" #include "util/color.h" +#include "util/debug.h" #include "util/evlist.h" #include "util/machine.h" #include "util/thread.h" @@ -311,10 +312,12 @@ static struct syscall *trace__syscall_info(struct trace *trace, return &trace->syscalls.table[id]; out_cant_read: - fprintf(trace->output, "Problems reading syscall %d", id); - if (id <= trace->syscalls.max && trace->syscalls.table[id].name != NULL) - fprintf(trace->output, "(%s)", trace->syscalls.table[id].name); - fputs(" information", trace->output); + if (verbose) { + fprintf(trace->output, "Problems reading syscall %d", id); + if (id <= trace->syscalls.max && trace->syscalls.table[id].name != NULL) + fprintf(trace->output, "(%s)", trace->syscalls.table[id].name); + fputs(" information\n", trace->output); + } return NULL; } @@ -714,6 +717,7 @@ int cmd_trace(int argc, const char **argv, const char *prefix __maybe_unused) "show only events with duration > N.M ms", trace__set_duration), OPT_BOOLEAN(0, "sched", &trace.sched, "show blocking scheduler events"), + OPT_INCR('v', "verbose", &verbose, "be more verbose"), OPT_END() }; int err; |