perf tests: Fix hist accumulation test

User's values from .perfconfig could overload the default callchain
setup and cause this test to fail.  Making sure the test is using
default callchain_param values.

Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Cc: David Ahern <dsahern@gmail.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/r/1467634583-29147-3-git-send-email-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

3 files changed, 18 insertions, 6 deletions

diff --git a/tools/perf/tests/hists_cumulate.c b/tools/perf/tests/hists_cumulate.c
index a9e3db3afac4..9fd54b79a788 100644
--- a/tools/perf/tests/hists_cumulate.c
+++ b/tools/perf/tests/hists_cumulate.c
@@ -216,6 +216,8 @@ static int do_test(struct hists *hists, struct result *expected, size_t nr_expec
 
                 /* check callchain entries */
                 root = &he->callchain->node.rb_root;
+
+                TEST_ASSERT_VAL("callchains expected", !RB_EMPTY_ROOT(root));
                 cnode = rb_entry(rb_first(root), struct callchain_node, rb_node);
 
                 c = 0;
@@ -666,6 +668,8 @@ static int test4(struct perf_evsel *evsel, struct machine *machine)
         perf_evsel__set_sample_bit(evsel, CALLCHAIN);
 
         setup_sorting(NULL);
+
+        callchain_param = callchain_param_default;
         callchain_register_param(&callchain_param);
 
         err = add_hist_entries(hists, machine);
diff --git a/tools/perf/util/callchain.h b/tools/perf/util/callchain.h
index a70f6b54eb92..13e75549c440 100644
--- a/tools/perf/util/callchain.h
+++ b/tools/perf/util/callchain.h
@@ -106,6 +106,7 @@ struct callchain_param {
 };
 
 extern struct callchain_param callchain_param;
+extern struct callchain_param callchain_param_default;
 
 struct callchain_list {
         u64                     ip;
diff --git a/tools/perf/util/util.c b/tools/perf/util/util.c
index e08b9a092a23..5f44a21955cd 100644
--- a/tools/perf/util/util.c
+++ b/tools/perf/util/util.c
@@ -19,12 +19,19 @@
 #include "callchain.h"
 #include "strlist.h"
 
-struct callchain_param  callchain_param = {
-        .mode   = CHAIN_GRAPH_ABS,
-        .min_percent = 0.5,
-        .order  = ORDER_CALLEE,
-        .key    = CCKEY_FUNCTION,
-        .value  = CCVAL_PERCENT,
+#define CALLCHAIN_PARAM_DEFAULT                 \
+        .mode           = CHAIN_GRAPH_ABS,      \
+        .min_percent    = 0.5,                  \
+        .order          = ORDER_CALLEE,         \
+        .key            = CCKEY_FUNCTION,       \
+        .value          = CCVAL_PERCENT,        \
+
+struct callchain_param callchain_param = {
+        CALLCHAIN_PARAM_DEFAULT
+};
+
+struct callchain_param callchain_param_default = {
+        CALLCHAIN_PARAM_DEFAULT
 };
 
 /*