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author | Valentin Rothberg <rothberg@redhat.com> | 2020-04-07 12:09:48 +0200 |
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committer | Valentin Rothberg <rothberg@redhat.com> | 2020-04-07 12:09:48 +0200 |
commit | 42fcdbf1a85c8e23ccc25a0e7e66b3a51b8f11dd (patch) | |
tree | 3344313b57b160a877044f56eec3d8e3c1c1669c /vendor/github.com/vbauerster/mpb/v5/decor/speed.go | |
parent | 64b6a197339e0436168e254ef9caf674ee9ff932 (diff) | |
download | podman-42fcdbf1a85c8e23ccc25a0e7e66b3a51b8f11dd.tar.gz podman-42fcdbf1a85c8e23ccc25a0e7e66b3a51b8f11dd.tar.bz2 podman-42fcdbf1a85c8e23ccc25a0e7e66b3a51b8f11dd.zip |
vendor c/image v5.4.2
Signed-off-by: Valentin Rothberg <rothberg@redhat.com>
Diffstat (limited to 'vendor/github.com/vbauerster/mpb/v5/decor/speed.go')
-rw-r--r-- | vendor/github.com/vbauerster/mpb/v5/decor/speed.go | 171 |
1 files changed, 171 insertions, 0 deletions
diff --git a/vendor/github.com/vbauerster/mpb/v5/decor/speed.go b/vendor/github.com/vbauerster/mpb/v5/decor/speed.go new file mode 100644 index 000000000..8a48e3f52 --- /dev/null +++ b/vendor/github.com/vbauerster/mpb/v5/decor/speed.go @@ -0,0 +1,171 @@ +package decor + +import ( + "fmt" + "io" + "math" + "time" + + "github.com/VividCortex/ewma" +) + +// FmtAsSpeed adds "/s" to the end of the input formatter. To be +// used with SizeB1000 or SizeB1024 types, for example: +// +// fmt.Printf("%.1f", FmtAsSpeed(SizeB1024(2048))) +// +func FmtAsSpeed(input fmt.Formatter) fmt.Formatter { + return &speedFormatter{input} +} + +type speedFormatter struct { + fmt.Formatter +} + +func (self *speedFormatter) Format(st fmt.State, verb rune) { + self.Formatter.Format(st, verb) + io.WriteString(st, "/s") +} + +// EwmaSpeed exponential-weighted-moving-average based speed decorator. +// For this decorator to work correctly you have to measure each +// iteration's duration and pass it to the +// *Bar.DecoratorEwmaUpdate(time.Duration) method after each increment. +func EwmaSpeed(unit int, format string, age float64, wcc ...WC) Decorator { + var average ewma.MovingAverage + if age == 0 { + average = ewma.NewMovingAverage() + } else { + average = ewma.NewMovingAverage(age) + } + return MovingAverageSpeed(unit, format, NewThreadSafeMovingAverage(average), wcc...) +} + +// MovingAverageSpeed decorator relies on MovingAverage implementation +// to calculate its average. +// +// `unit` one of [0|UnitKiB|UnitKB] zero for no unit +// +// `format` printf compatible verb for value, like "%f" or "%d" +// +// `average` MovingAverage implementation +// +// `wcc` optional WC config +// +// format examples: +// +// unit=UnitKiB, format="%.1f" output: "1.0MiB/s" +// unit=UnitKiB, format="% .1f" output: "1.0 MiB/s" +// unit=UnitKB, format="%.1f" output: "1.0MB/s" +// unit=UnitKB, format="% .1f" output: "1.0 MB/s" +// +func MovingAverageSpeed(unit int, format string, average ewma.MovingAverage, wcc ...WC) Decorator { + if format == "" { + format = "%.0f" + } + d := &movingAverageSpeed{ + WC: initWC(wcc...), + average: average, + producer: chooseSpeedProducer(unit, format), + } + return d +} + +type movingAverageSpeed struct { + WC + producer func(float64) string + average ewma.MovingAverage + msg string +} + +func (d *movingAverageSpeed) Decor(s *Statistics) string { + if !s.Completed { + var speed float64 + if v := d.average.Value(); v > 0 { + speed = 1 / v + } + d.msg = d.producer(speed * 1e9) + } + return d.FormatMsg(d.msg) +} + +func (d *movingAverageSpeed) EwmaUpdate(n int64, dur time.Duration) { + durPerByte := float64(dur) / float64(n) + if math.IsInf(durPerByte, 0) || math.IsNaN(durPerByte) { + return + } + d.average.Add(durPerByte) +} + +// AverageSpeed decorator with dynamic unit measure adjustment. It's +// a wrapper of NewAverageSpeed. +func AverageSpeed(unit int, format string, wcc ...WC) Decorator { + return NewAverageSpeed(unit, format, time.Now(), wcc...) +} + +// NewAverageSpeed decorator with dynamic unit measure adjustment and +// user provided start time. +// +// `unit` one of [0|UnitKiB|UnitKB] zero for no unit +// +// `format` printf compatible verb for value, like "%f" or "%d" +// +// `startTime` start time +// +// `wcc` optional WC config +// +// format examples: +// +// unit=UnitKiB, format="%.1f" output: "1.0MiB/s" +// unit=UnitKiB, format="% .1f" output: "1.0 MiB/s" +// unit=UnitKB, format="%.1f" output: "1.0MB/s" +// unit=UnitKB, format="% .1f" output: "1.0 MB/s" +// +func NewAverageSpeed(unit int, format string, startTime time.Time, wcc ...WC) Decorator { + if format == "" { + format = "%.0f" + } + d := &averageSpeed{ + WC: initWC(wcc...), + startTime: startTime, + producer: chooseSpeedProducer(unit, format), + } + return d +} + +type averageSpeed struct { + WC + startTime time.Time + producer func(float64) string + msg string +} + +func (d *averageSpeed) Decor(s *Statistics) string { + if !s.Completed { + speed := float64(s.Current) / float64(time.Since(d.startTime)) + d.msg = d.producer(speed * 1e9) + } + + return d.FormatMsg(d.msg) +} + +func (d *averageSpeed) AverageAdjust(startTime time.Time) { + d.startTime = startTime +} + +func chooseSpeedProducer(unit int, format string) func(float64) string { + switch unit { + case UnitKiB: + return func(speed float64) string { + return fmt.Sprintf(format, FmtAsSpeed(SizeB1024(math.Round(speed)))) + } + case UnitKB: + return func(speed float64) string { + return fmt.Sprintf(format, FmtAsSpeed(SizeB1000(math.Round(speed)))) + } + default: + return func(speed float64) string { + return fmt.Sprintf(format, speed) + } + } +} |