Provide error counters per worker for statsclient

Instead of a single value, the ErrorCounter now contains
an array representing couter values per workers.

Change-Id: I2b869e5b228bcb3e155b1fef08a4cd00e7d2e16a
Signed-off-by: Vladimir Lavor <vlavor@cisco.com>

7 files changed, 33 insertions, 16 deletions

diff --git a/adapter/stats_api.go b/adapter/stats_api.go
index 15c3789..4b398f5 100644
--- a/adapter/stats_api.go
+++ b/adapter/stats_api.go
@@ -126,8 +126,8 @@ type Stat interface {
 // ScalarStat represents stat for ScalarIndex.
 type ScalarStat float64
 
-// ErrorStat represents stat for ErrorIndex.
-type ErrorStat Counter
+// ErrorStat represents stat for ErrorIndex. The array represents workers.
+type ErrorStat []Counter
 
 // SimpleCounterStat represents stat for SimpleCounterVector.
 // The outer array represents workers and the inner array represents interface/node/.. indexes.
@@ -154,7 +154,15 @@ func (s ScalarStat) IsZero() bool {
 	return s == 0
 }
 func (s ErrorStat) IsZero() bool {
-	return s == 0
+	if s == nil {
+		return true
+	}
+	for _, ss := range s {
+		if ss != 0 {
+			return false
+		}
+	}
+	return true
 }
 func (s SimpleCounterStat) IsZero() bool {
 	if s == nil {
diff --git a/adapter/statsclient/statseg_v1.go b/adapter/statsclient/statseg_v1.go
index 3d45201..38f51bd 100644
--- a/adapter/statsclient/statseg_v1.go
+++ b/adapter/statsclient/statseg_v1.go
@@ -113,7 +113,7 @@ func (ss *statSegmentV1) CopyEntryData(statSegDir unsafe.Pointer) adapter.Stat {
 		_, errOffset, _ := ss.getOffsets()
 		offsetVector := unsafe.Pointer(&ss.sharedHeader[errOffset])
 
-		var errData adapter.Counter
+		var errData []adapter.Counter
 
 		vecLen := *(*uint32)(vectorLen(offsetVector))
 		for i := uint32(0); i < vecLen; i++ {
@@ -121,7 +121,7 @@ func (ss *statSegmentV1) CopyEntryData(statSegDir unsafe.Pointer) adapter.Stat {
 			offset := uintptr(cb) + uintptr(dirEntry.unionData)*unsafe.Sizeof(adapter.Counter(0))
 			debugf("error index, cb: %d, offset: %d", cb, offset)
 			val := *(*adapter.Counter)(statSegPointer(unsafe.Pointer(&ss.sharedHeader[0]), offset))
-			errData += val
+			errData = append(errData, val)
 		}
 		return adapter.ErrorStat(errData)
 
@@ -239,14 +239,14 @@ func (ss *statSegmentV1) UpdateEntryData(statSegDir unsafe.Pointer, stat *adapte
 		_, errOffset, _ := ss.getOffsets()
 		offsetVector := unsafe.Pointer(&ss.sharedHeader[errOffset])
 
-		var errData adapter.Counter
+		var errData []adapter.Counter
 
 		vecLen := *(*uint32)(vectorLen(unsafe.Pointer(&ss.sharedHeader[errOffset])))
 		for i := uint32(0); i < vecLen; i++ {
 			cb := *(*uint64)(statSegPointer(offsetVector, uintptr(i)*unsafe.Sizeof(uint64(0))))
 			offset := uintptr(cb) + uintptr(dirEntry.unionData)*unsafe.Sizeof(adapter.Counter(0))
 			val := *(*adapter.Counter)(statSegPointer(unsafe.Pointer(&ss.sharedHeader[0]), offset))
-			errData += val
+			errData = append(errData, val)
 		}
 		*stat = adapter.ErrorStat(errData)
 
diff --git a/adapter/statsclient/statseg_v2.go b/adapter/statsclient/statseg_v2.go
index d52077f..68411f9 100644
--- a/adapter/statsclient/statseg_v2.go
+++ b/adapter/statsclient/statseg_v2.go
@@ -105,7 +105,7 @@ func (ss *statSegmentV2) CopyEntryData(statSegDir unsafe.Pointer) adapter.Stat {
 			return nil
 		}
 		vecLen := *(*uint32)(vectorLen(dirVector))
-		var errData adapter.Counter
+		var errData []adapter.Counter
 		for i := uint32(0); i < vecLen; i++ {
 			cb := statSegPointer(dirVector, uintptr(i+1)*unsafe.Sizeof(uint64(0)))
 			cbVal := ss.adjust(vectorLen(cb))
@@ -115,7 +115,7 @@ func (ss *statSegmentV2) CopyEntryData(statSegDir unsafe.Pointer) adapter.Stat {
 			}
 			offset := uintptr(dirEntry.unionData) * unsafe.Sizeof(adapter.Counter(0))
 			val := *(*adapter.Counter)(statSegPointer(cbVal, offset))
-			errData += val
+			errData = append(errData, val)
 		}
 		return adapter.ErrorStat(errData)
 
@@ -224,7 +224,7 @@ func (ss *statSegmentV2) UpdateEntryData(statSegDir unsafe.Pointer, stat *adapte
 			return nil
 		}
 		vecLen := *(*uint32)(vectorLen(dirVector))
-		var errData adapter.Counter
+		var errData []adapter.Counter
 		for i := uint32(0); i < vecLen; i++ {
 			cb := statSegPointer(dirVector, uintptr(i+1)*unsafe.Sizeof(uint64(0)))
 			cbVal := ss.adjust(vectorLen(cb))
@@ -234,7 +234,7 @@ func (ss *statSegmentV2) UpdateEntryData(statSegDir unsafe.Pointer, stat *adapte
 			}
 			offset := uintptr(dirEntry.unionData) * unsafe.Sizeof(adapter.Counter(0))
 			val := *(*adapter.Counter)(statSegPointer(cbVal, offset))
-			errData += val
+			errData = append(errData, val)
 		}
 		*stat = adapter.ErrorStat(errData)
 
diff --git a/adapter/vppapiclient/stat_client.go b/adapter/vppapiclient/stat_client.go
index bf19c45..a124f59 100644
--- a/adapter/vppapiclient/stat_client.go
+++ b/adapter/vppapiclient/stat_client.go
@@ -130,7 +130,7 @@ func (c *statClient) DumpStats(patterns ...string) (stats []adapter.StatEntry, e
 			stat.Data = adapter.ScalarStat(C.govpp_stat_segment_data_get_scalar_value(&v))
 
 		case adapter.ErrorIndex:
-			stat.Data = adapter.ErrorStat(C.govpp_stat_segment_data_get_error_value(&v))
+			stat.Data = adapter.ErrorStat([]adapter.Counter{adapter.Counter(C.govpp_stat_segment_data_get_error_value(&v))})
 
 		case adapter.SimpleCounterVector:
 			length := int(C.govpp_stat_segment_vec_len(unsafe.Pointer(C.govpp_stat_segment_data_get_simple_counter(&v))))
diff --git a/api/stats.go b/api/stats.go
index 9e1ba75..3a72c6c 100644
--- a/api/stats.go
+++ b/api/stats.go
@@ -98,7 +98,7 @@ type ErrorStats struct {
 type ErrorCounter struct {
 	CounterName string
 
-	Value uint64
+	Values []uint64
 }
 
 // BufferStats represents statistics per buffer pool.
diff --git a/core/stats.go b/core/stats.go
index 55c287e..3218f1e 100644
--- a/core/stats.go
+++ b/core/stats.go
@@ -305,7 +305,11 @@ func (c *StatsConnection) GetErrorStats(errorStats *api.ErrorStats) (err error)
 			continue
 		}
 		if errStat, ok := stat.Data.(adapter.ErrorStat); ok {
-			errorStats.Errors[i].Value = uint64(errStat)
+			values := make([]uint64, len(errStat))
+			for j, errStatW := range errStat {
+				values[j] = uint64(errStatW)
+			}
+			errorStats.Errors[i].Values = values
 		}
 	}
 
diff --git a/examples/stats-client/stats_api.go b/examples/stats-client/stats_api.go
index 66dd451..0ccfa89 100644
--- a/examples/stats-client/stats_api.go
+++ b/examples/stats-client/stats_api.go
@@ -137,10 +137,15 @@ func main() {
 		}
 		n := 0
 		for _, counter := range stats.Errors {
-			if skipZeros && counter.Value == 0 {
+			var sum uint32
+			for _, valuePerWorker := range counter.Values {
+				sum += uint32(valuePerWorker)
+			}
+
+			if skipZeros && sum == 0 {
 				continue
 			}
-			fmt.Printf(" - %v\n", counter)
+			fmt.Printf(" - %v %d (per worker: %v)\n", counter.CounterName, sum, counter.Values)
 			n++
 		}
 		fmt.Printf("Listed %d (%d) error counters\n", n, len(stats.Errors))