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, 0 insertions, 33 deletions

diff --git a/adapter/statsclient/version.go b/adapter/statsclient/version.go
deleted file mode 100644
index a289faa..0000000
--- a/adapter/statsclient/version.go
+++ /dev/null
@@ -1,33 +0,0 @@
-//  Copyright (c) 2019 Cisco and/or its affiliates.
-//
-//  Licensed under the Apache License, Version 2.0 (the "License");
-//  you may not use this file except in compliance with the License.
-//  You may obtain a copy of the License at:
-//
-//      http://www.apache.org/licenses/LICENSE-2.0
-//
-//  Unless required by applicable law or agreed to in writing, software
-//  distributed under the License is distributed on an "AS IS" BASIS,
-//  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-//  See the License for the specific language governing permissions and
-//  limitations under the License.
-
-package statsclient
-
-import (
-	"fmt"
-)
-
-const (
-	MinVersion = 0
-	MaxVersion = 1
-)
-
-func checkVersion(ver uint64) error {
-	if ver < MinVersion {
-		return fmt.Errorf("stat segment version is too old: %v (minimal version: %v)", ver, MinVersion)
-	} else if ver > MaxVersion {
-		return fmt.Errorf("stat segment version is not supported: %v (minimal version: %v)", ver, MaxVersion)
-	}
-	return nil
-}