Optimizations for statsclient

- this dramatically improves performance for stats data collection
- memory allocation is now done only when stat dirs change
- updating prepared stat dir does not need to allocate memory
- created integration test for testing stats client
- added NumWorkerThreads and VectorRatePerWorker to SystemStats
- added ReduceSimpleCounterStatIndex, ReduceCombinedCounterStatIndex for
  aggregating specific index

Change-Id: I702731a69024ab5dd0832bb5cfe2773a987359e5
Signed-off-by: Ondrej Fabry <ofabry@cisco.com>

1 files changed, 9 insertions, 1 deletions

diff --git a/adapter/vppapiclient/stat_client_stub.go b/adapter/vppapiclient/stat_client_stub.go
index 57792f3..c764391 100644
--- a/adapter/vppapiclient/stat_client_stub.go
+++ b/adapter/vppapiclient/stat_client_stub.go
@@ -40,6 +40,14 @@ func (*stubStatClient) ListStats(patterns ...string) (statNames []string, err er
 	return nil, adapter.ErrNotImplemented
 }
 
-func (*stubStatClient) DumpStats(patterns ...string) ([]*adapter.StatEntry, error) {
+func (*stubStatClient) DumpStats(patterns ...string) ([]adapter.StatEntry, error) {
 	return nil, adapter.ErrNotImplemented
 }
+
+func (*stubStatClient) PrepareDir(prefixes ...string) (*adapter.StatDir, error) {
+	return nil, adapter.ErrNotImplemented
+}
+
+func (*stubStatClient) UpdateDir(dir *adapter.StatDir) error {
+	return adapter.ErrNotImplemented
+}