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app/vmselect/promql: remove rollupFuncArg.realPrevValue handling, since the corner case in increase() is handled in another way now

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See e00cfc854d for the approach used now.
This commit is contained in:
Aliaksandr Valialkin 2020-07-29 11:51:37 +03:00
parent d9037b3970
commit 717c554fb0
2 changed files with 7 additions and 30 deletions
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26
app/vmselect/promql/rollup.go
View File

@ -28,7 +28,7 @@ var rollupFuncs = map[string]newRollupFunc{
"deriv_fast": newRollupFuncOneArg(rollupDerivFast),
"holt_winters": newRollupHoltWinters,
"idelta": newRollupFuncOneArg(rollupIdelta),
"increase": newRollupFuncOneArg(rollupIncrease), // + rollupFuncsRemoveCounterResets
"increase": newRollupFuncOneArg(rollupDelta), // + rollupFuncsRemoveCounterResets
"irate": newRollupFuncOneArg(rollupIderiv), // + rollupFuncsRemoveCounterResets
"predict_linear": newRollupPredictLinear,
"rate": newRollupFuncOneArg(rollupDerivFast), // + rollupFuncsRemoveCounterResets
@ -94,7 +94,7 @@ var rollupAggrFuncs = map[string]rollupFunc{
"deriv": rollupDerivSlow,
"deriv_fast": rollupDerivFast,
"idelta": rollupIdelta,
"increase": rollupIncrease, // + rollupFuncsRemoveCounterResets
"increase": rollupDelta, // + rollupFuncsRemoveCounterResets
"irate": rollupIderiv, // + rollupFuncsRemoveCounterResets
"rate": rollupDerivFast, // + rollupFuncsRemoveCounterResets
"resets": rollupResets,
@ -327,10 +327,6 @@ type rollupFuncArg struct {
idx int
step int64
// Real previous value even if it is located too far from the current window.
// It matches prevValue if prevValue is not nan.
realPrevValue float64
tsm *timeseriesMap
}
@ -342,7 +338,6 @@ func (rfa *rollupFuncArg) reset() {
rfa.currTimestamp = 0
rfa.idx = 0
rfa.step = 0
rfa.realPrevValue = nan
rfa.tsm = nil
}
@ -487,7 +482,6 @@ func (rc *rollupConfig) doInternal(dstValues []float64, tsm *timeseriesMap, valu
rfa := getRollupFuncArg()
rfa.idx = 0
rfa.step = rc.Step
rfa.realPrevValue = nan
rfa.tsm = tsm
i := 0
@ -514,11 +508,6 @@ func (rc *rollupConfig) doInternal(dstValues []float64, tsm *timeseriesMap, valu
rfa.values = values[i:j]
rfa.timestamps = timestamps[i:j]
rfa.currTimestamp = tEnd
if i > 0 {
rfa.realPrevValue = values[i-1]
} else {
rfa.realPrevValue = nan
}
value := rc.Func(rfa)
rfa.idx++
dstValues = append(dstValues, value)
@ -1205,14 +1194,6 @@ func rollupStdvar(rfa *rollupFuncArg) float64 {
}
func rollupDelta(rfa *rollupFuncArg) float64 {
return rollupDeltaInternal(rfa, false)
}
func rollupIncrease(rfa *rollupFuncArg) float64 {
return rollupDeltaInternal(rfa, true)
}
func rollupDeltaInternal(rfa *rollupFuncArg, canUseRealPrevValue bool) float64 {
// There is no need in handling NaNs here, since they must be cleaned up
// before calling rollup funcs.
values := rfa.values
@ -1236,9 +1217,6 @@ func rollupDeltaInternal(rfa *rollupFuncArg, canUseRealPrevValue bool) float64 {
}
if math.Abs(values[0]) < 10*(math.Abs(d)+1) {
prevValue = 0
if canUseRealPrevValue && !math.IsNaN(rfa.realPrevValue) {
prevValue = rfa.realPrevValue
}
} else {
prevValue = values[0]
values = values[1:]

5
app/vmselect/promql/rollup_test.go
View File

@ -1040,15 +1040,14 @@ func testRowsEqual(t *testing.T, values []float64, timestamps []int64, valuesExp
}
}
func TestRollupIncrease(t *testing.T) {
func TestRollupDelta(t *testing.T) {
f := func(prevValue float64, values []float64, resultExpected float64) {
t.Helper()
rfa := &rollupFuncArg{
prevValue: prevValue,
realPrevValue: prevValue,
values: values,
}
result := rollupIncrease(rfa)
result := rollupDelta(rfa)
if math.IsNaN(result) {
if !math.IsNaN(resultExpected) {
t.Fatalf("unexpected result; got %v; want %v", result, resultExpected)