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/*
* =========================================================================================
* Copyright © 2013-2015 the kamon project <http://kamon.io/>
*
* 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 kamon.system.sigar
import kamon.metric.GenericEntityRecorder
import kamon.metric.instrument.InstrumentFactory
import org.hyperic.sigar.Sigar
/**
* Cpu usage metrics, as reported by Sigar:
* - user: Total percentage of system cpu user time.
* - system: Total percentage of system cpu kernel time.
* - wait: Total percentage of system cpu io wait time.
* - idle: Total percentage of system cpu idle time
* - stolen: Total percentage of system cpu involuntary wait time. @see [[https://www.datadoghq.com/2013/08/understanding-aws-stolen-cpu-and-how-it-affects-your-apps/ "Understanding Stolen Cpu"]]
*/
class CpuMetrics(sigar: Sigar, instrumentFactory: InstrumentFactory) extends GenericEntityRecorder(instrumentFactory) with SigarMetric {
val user = histogram("cpu-user")
val system = histogram("cpu-system")
val Wait = histogram("cpu-wait")
val idle = histogram("cpu-idle")
val stolen = histogram("cpu-stolen")
def update(): Unit = {
val cpuPerc = sigar.getCpuPerc
user.record((cpuPerc.getUser * 100L).toLong)
system.record((cpuPerc.getSys * 100L).toLong)
Wait.record((cpuPerc.getWait * 100L).toLong)
idle.record((cpuPerc.getIdle * 100L).toLong)
stolen.record((cpuPerc.getStolen * 100L).toLong)
}
}
object CpuMetrics extends SigarMetricRecorderCompanion("cpu") {
def apply(sigar: Sigar, instrumentFactory: InstrumentFactory): CpuMetrics =
new CpuMetrics(sigar, instrumentFactory)
}
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