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net/speedtest: retune to meet iperf on localhost in a VM

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- removed some in-flow time calls
- increase buffer size to 2MB to overcome syscall cost
- move relative time computation from record to report time

Signed-off-by: James Tucker <james@tailscale.com>
This commit is contained in:
James Tucker
2022-09-14 17:52:47 -07:00
committed by James Tucker
parent 146f51ce76
commit f7cb535693
4 changed files with 28 additions and 35 deletions
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net/speedtest/speedtest.go
+8 -8
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@@ -11,11 +11,11 @@ import (
)
const (
blockSize = 32000 // size of the block of data to send
blockSize = 2 * 1024 * 1024 // size of the block of data to send
MinDuration = 5 * time.Second // minimum duration for a test
DefaultDuration = MinDuration // default duration for a test
MaxDuration = 30 * time.Second // maximum duration for a test
version = 1 // value used when comparing client and server versions
version = 2 // value used when comparing client and server versions
increment = time.Second // increment to display results for, in seconds
minInterval = 10 * time.Millisecond // minimum interval length for a result to be included
DefaultPort = 20333
@@ -37,14 +37,14 @@ type configResponse struct {
// This represents the Result of a speedtest within a specific interval
type Result struct {
Bytes int // number of bytes sent/received during the interval
IntervalStart time.Duration // duration between the start of the interval and the start of the test
IntervalEnd time.Duration // duration between the end of the interval and the start of the test
Total bool // if true, this result struct represents the entire test, rather than a segment of the test
Bytes int // number of bytes sent/received during the interval
IntervalStart time.Time // start of the interval
IntervalEnd time.Time // end of the interval
Total bool // if true, this result struct represents the entire test, rather than a segment of the test
}
func (r Result) MBitsPerSecond() float64 {
return r.MegaBits() / (r.IntervalEnd - r.IntervalStart).Seconds()
return r.MegaBits() / r.IntervalEnd.Sub(r.IntervalStart).Seconds()
}
func (r Result) MegaBytes() float64 {
@@ -56,7 +56,7 @@ func (r Result) MegaBits() float64 {
}
func (r Result) Interval() time.Duration {
return r.IntervalEnd - r.IntervalStart
return r.IntervalEnd.Sub(r.IntervalStart)
}
type Direction int