diff options
Diffstat (limited to 'tools/perf')
| -rw-r--r-- | tools/perf/builtin-report.c | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/tools/perf/builtin-report.c b/tools/perf/builtin-report.c index aebba565934..1e2f5dde312 100644 --- a/tools/perf/builtin-report.c +++ b/tools/perf/builtin-report.c @@ -40,6 +40,7 @@ static int dump_trace = 0; static int verbose; static int full_paths; +static int collapse_syscalls; static unsigned long page_size; static unsigned long mmap_window = 32; @@ -983,6 +984,15 @@ process_overflow_event(event_t *event, unsigned long offset, unsigned long head) for (i = 0; i < chain->nr; i++) dprintf("..... %2d: %p\n", i, (void *)chain->ips[i]); } + if (collapse_syscalls) { + /* + * Find the all-but-last kernel entry + * amongst the call-chains - to get + * to the level of system calls: + */ + if (chain->kernel >= 2) + ip = chain->ips[chain->kernel-2]; + } } dprintf(" ... thread: %s:%d\n", thread->comm, thread->pid); @@ -1343,6 +1353,8 @@ static const struct option options[] = { "sort by key(s): pid, comm, dso, symbol. Default: pid,symbol"), OPT_BOOLEAN('P', "full-paths", &full_paths, "Don't shorten the pathnames taking into account the cwd"), + OPT_BOOLEAN('S', "syscalls", &collapse_syscalls, + "show per syscall summary overhead, using call graph"), OPT_END() }; |