perf trace: Add option to show process COMM

[platform/adaptation/renesas_rcar/renesas_kernel.git] / tools / perf / builtin-trace.c

diff --git a/tools/perf/builtin-trace.c b/tools/perf/builtin-trace.c
index c400fbe..be65843 100644 (file)
--- a/tools/perf/builtin-trace.c
+++ b/tools/perf/builtin-trace.c
@@ -13,6 +13,7 @@
 
 #include <libaudit.h>
 #include <stdlib.h>
+#include <sys/eventfd.h>
 #include <sys/mman.h>
 #include <linux/futex.h>
 
@@ -456,6 +457,32 @@ static size_t syscall_arg__scnprintf_open_flags(char *bf, size_t size,
 
 #define SCA_OPEN_FLAGS syscall_arg__scnprintf_open_flags
 
+static size_t syscall_arg__scnprintf_eventfd_flags(char *bf, size_t size,
+                                                  struct syscall_arg *arg)
+{
+       int printed = 0, flags = arg->val;
+
+       if (flags == 0)
+               return scnprintf(bf, size, "NONE");
+#define        P_FLAG(n) \
+       if (flags & EFD_##n) { \
+               printed += scnprintf(bf + printed, size - printed, "%s%s", printed ? "|" : "", #n); \
+               flags &= ~EFD_##n; \
+       }
+
+       P_FLAG(SEMAPHORE);
+       P_FLAG(CLOEXEC);
+       P_FLAG(NONBLOCK);
+#undef P_FLAG
+
+       if (flags)
+               printed += scnprintf(bf + printed, size - printed, "%s%#x", printed ? "|" : "", flags);
+
+       return printed;
+}
+
+#define SCA_EFD_FLAGS syscall_arg__scnprintf_eventfd_flags
+
 static size_t syscall_arg__scnprintf_signum(char *bf, size_t size, struct syscall_arg *arg)
 {
        int sig = arg->val;
@@ -516,6 +543,8 @@ static struct syscall_fmt {
        { .name     = "brk",        .hexret = true,
          .arg_scnprintf = { [0] = SCA_HEX, /* brk */ }, },
        { .name     = "connect",    .errmsg = true, },
+       { .name     = "eventfd2",   .errmsg = true,
+         .arg_scnprintf = { [1] = SCA_EFD_FLAGS, /* flags */ }, },
        { .name     = "fcntl",      .errmsg = true,
          .arg_scnprintf = { [1] = SCA_STRARRAY, /* cmd */ },
          .arg_parm      = { [1] = &strarray__fcntl_cmds, /* cmd */ }, },
@@ -697,6 +726,7 @@ struct trace {
        struct intlist          *pid_list;
        bool                    sched;
        bool                    multiple_threads;
+       bool                    show_comm;
        double                  duration_filter;
        double                  runtime_ms;
 };
@@ -726,8 +756,11 @@ static size_t trace__fprintf_entry_head(struct trace *trace, struct thread *thre
        size_t printed = trace__fprintf_tstamp(trace, tstamp, fp);
        printed += fprintf_duration(duration, fp);
 
-       if (trace->multiple_threads)
+       if (trace->multiple_threads) {
+               if (trace->show_comm)
+                       printed += fprintf(fp, "%.14s/", thread->comm);
                printed += fprintf(fp, "%d ", thread->tid);
+       }
 
        return printed;
 }
@@ -1474,10 +1507,13 @@ int cmd_trace(int argc, const char **argv, const char *prefix __maybe_unused)
                        .mmap_pages    = 1024,
                },
                .output = stdout,
+               .show_comm = true,
        };
        const char *output_name = NULL;
        const char *ev_qualifier_str = NULL;
        const struct option trace_options[] = {
+       OPT_BOOLEAN(0, "comm", &trace.show_comm,
+                   "show the thread COMM next to its id"),
        OPT_STRING('e', "expr", &ev_qualifier_str, "expr",
                    "list of events to trace"),
        OPT_STRING('o', "output", &output_name, "file", "output file name"),