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Diffstat (limited to 'integration_test/latency.go')
-rw-r--r-- | integration_test/latency.go | 44 |
1 files changed, 44 insertions, 0 deletions
diff --git a/integration_test/latency.go b/integration_test/latency.go new file mode 100644 index 0000000..383d069 --- /dev/null +++ b/integration_test/latency.go @@ -0,0 +1,44 @@ +// Copyright 2018 The dexon-consensus-core Authors +// This file is part of the dexon-consensus-core library. +// +// The dexon-consensus-core library is free software: you can redistribute it +// and/or modify it under the terms of the GNU Lesser General Public License as +// published by the Free Software Foundation, either version 3 of the License, +// or (at your option) any later version. +// +// The dexon-consensus-core library is distributed in the hope that it will be +// useful, but WITHOUT ANY WARRANTY; without even the implied warranty of +// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser +// General Public License for more details. +// +// You should have received a copy of the GNU Lesser General Public License +// along with the dexon-consensus-core library. If not, see +// <http://www.gnu.org/licenses/>. + +package integration + +import ( + "math/rand" + "time" +) + +// LatencyModel defines an interface to randomly decide latency +// for one operation. +type LatencyModel interface { + Delay() time.Duration +} + +// normalLatencyModel would return latencies in normal distribution. +type normalLatencyModel struct { + Sigma float64 + Mean float64 +} + +// Delay implements LatencyModel interface. +func (m *normalLatencyModel) Delay() time.Duration { + delay := rand.NormFloat64()*m.Sigma + m.Mean + if delay < 0 { + delay = m.Sigma / 2 + } + return time.Duration(delay) * time.Millisecond +} |