perf tools: Introduce perf_callchain_config()

This patch adds support for following config options to ~/.perfconfig file.

  [call-graph]
    record-mode = dwarf
    dump-size = 8192
    print-type = fractal
    order = callee
    threshold = 0.5
    print-limit = 128
    sort-key = function

Reviewed-by: David Ahern <dsahern@gmail.com>
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Acked-by: Jiri Olsa <jolsa@redhat.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Milian Wolff <mail@milianw.de>
Cc: Namhyung Kim <namhyung.kim@lge.com>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/r/1411434104-5307-5-git-send-email-namhyung@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

3 files changed, 94 insertions, 19 deletions

diff --git a/tools/perf/util/callchain.c b/tools/perf/util/callchain.c
index ba7297230143..c84d3f8dcb75 100644
--- a/tools/perf/util/callchain.c
+++ b/tools/perf/util/callchain.c
@@ -109,6 +109,49 @@ int parse_callchain_record_opt(const char *arg)
         return ret;
 }
 
+static int parse_callchain_mode(const char *value)
+{
+        if (!strncmp(value, "graph", strlen(value))) {
+                callchain_param.mode = CHAIN_GRAPH_ABS;
+                return 0;
+        }
+        if (!strncmp(value, "flat", strlen(value))) {
+                callchain_param.mode = CHAIN_FLAT;
+                return 0;
+        }
+        if (!strncmp(value, "fractal", strlen(value))) {
+                callchain_param.mode = CHAIN_GRAPH_REL;
+                return 0;
+        }
+        return -1;
+}
+
+static int parse_callchain_order(const char *value)
+{
+        if (!strncmp(value, "caller", strlen(value))) {
+                callchain_param.order = ORDER_CALLER;
+                return 0;
+        }
+        if (!strncmp(value, "callee", strlen(value))) {
+                callchain_param.order = ORDER_CALLEE;
+                return 0;
+        }
+        return -1;
+}
+
+static int parse_callchain_sort_key(const char *value)
+{
+        if (!strncmp(value, "function", strlen(value))) {
+                callchain_param.key = CCKEY_FUNCTION;
+                return 0;
+        }
+        if (!strncmp(value, "address", strlen(value))) {
+                callchain_param.key = CCKEY_ADDRESS;
+                return 0;
+        }
+        return -1;
+}
+
 int
 parse_callchain_report_opt(const char *arg)
 {
@@ -128,25 +171,12 @@ parse_callchain_report_opt(const char *arg)
                         return 0;
                 }
 
-                /* try to get the output mode */
-                if (!strncmp(tok, "graph", strlen(tok)))
-                        callchain_param.mode = CHAIN_GRAPH_ABS;
-                else if (!strncmp(tok, "flat", strlen(tok)))
-                        callchain_param.mode = CHAIN_FLAT;
-                else if (!strncmp(tok, "fractal", strlen(tok)))
-                        callchain_param.mode = CHAIN_GRAPH_REL;
-                /* try to get the call chain order */
-                else if (!strncmp(tok, "caller", strlen(tok)))
-                        callchain_param.order = ORDER_CALLER;
-                else if (!strncmp(tok, "callee", strlen(tok)))
-                        callchain_param.order = ORDER_CALLEE;
-                /* try to get the sort key */
-                else if (!strncmp(tok, "function", strlen(tok)))
-                        callchain_param.key = CCKEY_FUNCTION;
-                else if (!strncmp(tok, "address", strlen(tok)))
-                        callchain_param.key = CCKEY_ADDRESS;
-                /* try to get the min percent */
-                else if (!minpcnt_set) {
+                if (!parse_callchain_mode(tok) ||
+                    !parse_callchain_order(tok) ||
+                    !parse_callchain_sort_key(tok)) {
+                        /* parsing ok - move on to the next */
+                } else if (!minpcnt_set) {
+                        /* try to get the min percent */
                         callchain_param.min_percent = strtod(tok, &endptr);
                         if (tok == endptr)
                                 return -1;
@@ -168,6 +198,47 @@ parse_callchain_report_opt(const char *arg)
         return 0;
 }
 
+int perf_callchain_config(const char *var, const char *value)
+{
+        char *endptr;
+
+        if (prefixcmp(var, "call-graph."))
+                return 0;
+        var += sizeof("call-graph.") - 1;
+
+        if (!strcmp(var, "record-mode"))
+                return parse_callchain_record_opt(value);
+#ifdef HAVE_DWARF_UNWIND_SUPPORT
+        if (!strcmp(var, "dump-size")) {
+                unsigned long size = 0;
+                int ret;
+
+                ret = get_stack_size(value, &size);
+                callchain_param.dump_size = size;
+
+                return ret;
+        }
+#endif
+        if (!strcmp(var, "print-type"))
+                return parse_callchain_mode(value);
+        if (!strcmp(var, "order"))
+                return parse_callchain_order(value);
+        if (!strcmp(var, "sort-key"))
+                return parse_callchain_sort_key(value);
+        if (!strcmp(var, "threshold")) {
+                callchain_param.min_percent = strtod(value, &endptr);
+                if (value == endptr)
+                        return -1;
+        }
+        if (!strcmp(var, "print-limit")) {
+                callchain_param.print_limit = strtod(value, &endptr);
+                if (value == endptr)
+                        return -1;
+        }
+
+        return 0;
+}
+
 static void
 rb_insert_callchain(struct rb_root *root, struct callchain_node *chain,
                     enum chain_mode mode)
diff --git a/tools/perf/util/callchain.h b/tools/perf/util/callchain.h
index 8adfbf0bab5c..2a1f5a46543a 100644
--- a/tools/perf/util/callchain.h
+++ b/tools/perf/util/callchain.h
@@ -170,6 +170,7 @@ int fill_callchain_info(struct addr_location *al, struct callchain_cursor_node *
 extern const char record_callchain_help[];
 int parse_callchain_record_opt(const char *arg);
 int parse_callchain_report_opt(const char *arg);
+int perf_callchain_config(const char *var, const char *value);
 
 static inline void callchain_cursor_snapshot(struct callchain_cursor *dest,
                                              struct callchain_cursor *src)
diff --git a/tools/perf/util/config.c b/tools/perf/util/config.c
index 9970b8b0190b..953512ed72ba 100644
--- a/tools/perf/util/config.c
+++ b/tools/perf/util/config.c
@@ -396,6 +396,9 @@ int perf_default_config(const char *var, const char *value,
         if (!prefixcmp(var, "ui."))
                 return perf_ui_config(var, value);
 
+        if (!prefixcmp(var, "call-graph."))
+                return perf_callchain_config(var, value);
+
         /* Add other config variables here. */
         return 0;
 }