1 files changed, 34 insertions, 11 deletions

diff --git a/tools/perf/builtin-report.c b/tools/perf/builtin-report.c
index 0ca46386d936..e8c98179fe45 100644
--- a/tools/perf/builtin-report.c
+++ b/tools/perf/builtin-report.c
@@ -60,6 +60,7 @@ static regex_t		parent_regex;
 static int              exclude_other = 1;
 static int              callchain;
 static enum chain_mode  callchain_mode;
+static double           callchain_min_percent = 0.0;
 
 static u64              sample_type;
 
@@ -1224,7 +1225,7 @@ static void collapse__resort(void)
 
 static struct rb_root output_hists;
 
-static void output__insert_entry(struct hist_entry *he)
+static void output__insert_entry(struct hist_entry *he, u64 min_callchain_hits)
 {
         struct rb_node **p = &output_hists.rb_node;
         struct rb_node *parent = NULL;
@@ -1232,9 +1233,11 @@ static void output__insert_entry(struct hist_entry *he)
 
         if (callchain) {
                 if (callchain_mode == FLAT)
-                        sort_chain_flat(&he->sorted_chain, &he->callchain);
+                        sort_chain_flat(&he->sorted_chain, &he->callchain,
+                                        min_callchain_hits);
                 else if (callchain_mode == GRAPH)
-                        sort_chain_graph(&he->sorted_chain, &he->callchain);
+                        sort_chain_graph(&he->sorted_chain, &he->callchain,
+                                         min_callchain_hits);
         }
 
         while (*p != NULL) {
@@ -1251,11 +1254,14 @@ static void output__insert_entry(struct hist_entry *he)
         rb_insert_color(&he->rb_node, &output_hists);
 }
 
-static void output__resort(void)
+static void output__resort(u64 total_samples)
 {
         struct rb_node *next;
         struct hist_entry *n;
         struct rb_root *tree = &hist;
+        u64 min_callchain_hits;
+
+        min_callchain_hits = total_samples * (callchain_min_percent / 100);
 
         if (sort__need_collapse)
                 tree = &collapse_hists;
@@ -1267,7 +1273,7 @@ static void output__resort(void)
                 next = rb_next(&n->rb_node);
 
                 rb_erase(&n->rb_node, tree);
-                output__insert_entry(n);
+                output__insert_entry(n, min_callchain_hits);
         }
 }
 
@@ -1801,7 +1807,7 @@ done:
                 dsos__fprintf(stdout);
 
         collapse__resort();
-        output__resort();
+        output__resort(total);
         output__fprintf(stdout, total);
 
         return rc;
@@ -1811,19 +1817,36 @@ static int
 parse_callchain_opt(const struct option *opt __used, const char *arg,
                     int unset __used)
 {
+        char *tok;
+        char *endptr;
+
         callchain = 1;
 
         if (!arg)
                 return 0;
 
-        if (!strncmp(arg, "graph", strlen(arg)))
+        tok = strtok((char *)arg, ",");
+        if (!tok)
+                return -1;
+
+        /* get the output mode */
+        if (!strncmp(tok, "graph", strlen(arg)))
                 callchain_mode = GRAPH;
 
-        else if (!strncmp(arg, "flat", strlen(arg)))
+        else if (!strncmp(tok, "flat", strlen(arg)))
                 callchain_mode = FLAT;
         else
                 return -1;
 
+        /* get the min percentage */
+        tok = strtok(NULL, ",");
+        if (!tok)
+                return 0;
+
+        callchain_min_percent = strtod(tok, &endptr);
+        if (tok == endptr)
+                return -1;
+
         return 0;
 }
 
@@ -1850,9 +1873,9 @@ static const struct option options[] = {
                    "regex filter to identify parent, see: '--sort parent'"),
         OPT_BOOLEAN('x', "exclude-other", &exclude_other,
                     "Only display entries with parent-match"),
-        OPT_CALLBACK_DEFAULT('c', "callchain", NULL, "output_type",
-                     "Display callchains with output_type: flat, graph. "
-                     "Default to flat", &parse_callchain_opt, "flat"),
+        OPT_CALLBACK_DEFAULT('c', "callchain", NULL, "output_type,min_percent",
+                     "Display callchains using output_type and min percent threshold. "
+                     "Default: flat,0", &parse_callchain_opt, "flat,100"),
         OPT_STRING('d', "dsos", &dso_list_str, "dso[,dso...]",
                    "only consider symbols in these dsos"),
         OPT_STRING('C', "comms", &comm_list_str, "comm[,comm...]",