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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.{ ProcCpu, Sigar }
class ProcessCpuMetrics(sigar: Sigar, instrumentFactory: InstrumentFactory) extends GenericEntityRecorder(instrumentFactory) with SigarMetric {
val processUserCpu = histogram("process-user-cpu")
val processSystemCpu = histogram("process-system-cpu")
val processTotalCpu = histogram("process-cpu")
var lastProcCpu: Option[ProcCpu] = None
def update(): Unit = {
val pid = sigar.getPid
val procCpu = sigar.getProcCpu(pid)
lastProcCpu.map { last ⇒
val timeDiff = procCpu.getLastTime - last.getLastTime
if (timeDiff > 0) {
val userPercent = (((procCpu.getUser - last.getUser) / timeDiff.toDouble) * 100).toLong
val systemPercent = (((procCpu.getSys - last.getSys) / timeDiff.toDouble) * 100).toLong
processUserCpu.record(userPercent)
processSystemCpu.record(systemPercent)
processTotalCpu.record(userPercent + systemPercent)
}
}
lastProcCpu = Some(procCpu)
}
}
object ProcessCpuMetrics extends SigarMetricRecorderCompanion("process-cpu") {
def apply(sigar: Sigar, instrumentFactory: InstrumentFactory): ProcessCpuMetrics =
new ProcessCpuMetrics(sigar, instrumentFactory)
}
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