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Merge pull request #856 from juan-leon/delayacct-blkio-ticks-as-iowait

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Provide an estimation of Iowait metric per process
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shirou 2020-04-15 22:59:17 +09:00 committed by GitHub
commit 93a90ccfca
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1 changed files with 9 additions and 0 deletions
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9
process/process_linux.go
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@ -1157,10 +1157,19 @@ func (p *Process) fillFromTIDStatWithContext(ctx context.Context, tid int32) (ui
return 0, 0, nil, 0, 0, 0, nil, err return 0, 0, nil, 0, 0, 0, nil, err
} }
// There is no such thing as iotime in stat file. As an approximation, we
// will use delayacct_blkio_ticks (aggregated block I/O delays, as per Linux
// docs). Note: I am assuming at least Linux 2.6.18
iotime, err := strconv.ParseFloat(fields[i+40], 64)
if err != nil {
iotime = 0 // Ancient linux version, most likely
}
cpuTimes := &cpu.TimesStat{ cpuTimes := &cpu.TimesStat{
CPU: "cpu", CPU: "cpu",
User: float64(utime / ClockTicks), User: float64(utime / ClockTicks),
System: float64(stime / ClockTicks), System: float64(stime / ClockTicks),
Iowait: float64(iotime / ClockTicks),
} }
bootTime, _ := common.BootTimeWithContext(ctx) bootTime, _ := common.BootTimeWithContext(ctx)