perf tools: Make 'trace' or 'trace_fields' sort key default for tracepoint events

When an evlist contains tracepoint events only, use 'trace' sort key as
default.  If --raw-trace option was given, use 'trace_fields' instead.
This will make users more convenient to see trace result.

Suggested-and-Acked-by: Jiri Olsa <jolsa@kernel.org>
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Andi Kleen <andi@firstfloor.org>
Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Wang Nan <wangnan0@huawei.com>
Link: http://lkml.kernel.org/r/1450804030-29193-14-git-send-email-namhyung@kernel.org
[ Check evlist in get_default_sort_order() fixing a segfault in 'perf test hists' reported by Jiri Olsa ]
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

diff --git a/tools/perf/util/sort.c b/tools/perf/util/sort.c
index 79aa71d26d9ff431bea845e0bbf57ab7c8bcab63..4b4b1c5cccef3f56d2d06c79e5483f03a06d22cb 100644 (file)
--- a/tools/perf/util/sort.c
+++ b/tools/perf/util/sort.c
@@ -15,6 +15,7 @@ const char    default_branch_sort_order[] = "comm,dso_from,symbol_from,symbol_to,cy
 const char     default_mem_sort_order[] = "local_weight,mem,sym,dso,symbol_daddr,dso_daddr,snoop,tlb,locked";
 const char     default_top_sort_order[] = "dso,symbol";
 const char     default_diff_sort_order[] = "dso,symbol";
+const char     default_tracepoint_sort_order[] = "trace";
 const char     *sort_order;
 const char     *field_order;
 regex_t                ignore_callees_regex;
@@ -2171,7 +2172,7 @@ static int sort_dimension__add(const char *tok,
        return -ESRCH;
 }
 
-static const char *get_default_sort_order(void)
+static const char *get_default_sort_order(struct perf_evlist *evlist)
 {
        const char *default_sort_orders[] = {
                default_sort_order,
@@ -2179,14 +2180,33 @@ static const char *get_default_sort_order(void)
                default_mem_sort_order,
                default_top_sort_order,
                default_diff_sort_order,
+               default_tracepoint_sort_order,
        };
+       bool use_trace = true;
+       struct perf_evsel *evsel;
 
        BUG_ON(sort__mode >= ARRAY_SIZE(default_sort_orders));
 
+       if (evlist == NULL)
+               goto out_no_evlist;
+
+       evlist__for_each(evlist, evsel) {
+               if (evsel->attr.type != PERF_TYPE_TRACEPOINT) {
+                       use_trace = false;
+                       break;
+               }
+       }
+
+       if (use_trace) {
+               sort__mode = SORT_MODE__TRACEPOINT;
+               if (symbol_conf.raw_trace)
+                       return "trace_fields";
+       }
+out_no_evlist:
        return default_sort_orders[sort__mode];
 }
 
-static int setup_sort_order(void)
+static int setup_sort_order(struct perf_evlist *evlist)
 {
        char *new_sort_order;
 
@@ -2207,7 +2227,7 @@ static int setup_sort_order(void)
         * because it's checked over the rest of the code.
         */
        if (asprintf(&new_sort_order, "%s,%s",
-                    get_default_sort_order(), sort_order + 1) < 0) {
+                    get_default_sort_order(evlist), sort_order + 1) < 0) {
                error("Not enough memory to set up --sort");
                return -ENOMEM;
        }
@@ -2222,7 +2242,7 @@ static int __setup_sorting(struct perf_evlist *evlist)
        const char *sort_keys;
        int ret = 0;
 
-       ret = setup_sort_order();
+       ret = setup_sort_order(evlist);
        if (ret)
                return ret;
 
@@ -2236,7 +2256,7 @@ static int __setup_sorting(struct perf_evlist *evlist)
                        return 0;
                }
 
-               sort_keys = get_default_sort_order();
+               sort_keys = get_default_sort_order(evlist);
        }
 
        str = strdup(sort_keys);

diff --git a/tools/perf/util/sort.h b/tools/perf/util/sort.h
index 6b7590ade22979a195da73881d8efdfae2f6117e..dec536b6ab3de893472bdb4454a94028df0a3a46 100644 (file)
--- a/tools/perf/util/sort.h
+++ b/tools/perf/util/sort.h
@@ -167,6 +167,7 @@ enum sort_mode {
        SORT_MODE__MEMORY,
        SORT_MODE__TOP,
        SORT_MODE__DIFF,
+       SORT_MODE__TRACEPOINT,
 };
 
 enum sort_type {