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Merge pull request #506 from Arceliar/switchorder
Switch priority change
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commit
adf69d0127
2
go.sum
2
go.sum
@ -40,6 +40,7 @@ golang.org/x/net v0.0.0-20190620200207-3b0461eec859/go.mod h1:z5CRVTTTmAJ677TzLL
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golang.org/x/net v0.0.0-20190628185345-da137c7871d7/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
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golang.org/x/net v0.0.0-20190724013045-ca1201d0de80 h1:Ao/3l156eZf2AW5wK8a7/smtodRU+gha3+BeqJ69lRk=
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golang.org/x/net v0.0.0-20190724013045-ca1201d0de80/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
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golang.org/x/net v0.0.0-20190813141303-74dc4d7220e7 h1:fHDIZ2oxGnUZRN6WgWFCbYBjH9uqVPRCUVUDhs0wnbA=
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golang.org/x/net v0.0.0-20190813141303-74dc4d7220e7/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
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golang.org/x/sync v0.0.0-20190423024810-112230192c58/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
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golang.org/x/sys v0.0.0-20181206074257-70b957f3b65e h1:njOxP/wVblhCLIUhjHXf6X+dzTt5OQ3vMQo9mkOIKIo=
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@ -53,6 +54,7 @@ golang.org/x/sys v0.0.0-20190801041406-cbf593c0f2f3 h1:4y9KwBHBgBNwDbtu44R5o1fdO
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golang.org/x/sys v0.0.0-20190801041406-cbf593c0f2f3/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
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golang.org/x/sys v0.0.0-20190812073006-9eafafc0a87e h1:TsjK5I7fXk8f2FQrgu6NS7i5Qih3knl2FL1htyguLRE=
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golang.org/x/sys v0.0.0-20190812073006-9eafafc0a87e/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
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golang.org/x/sys v0.0.0-20190813064441-fde4db37ae7a h1:aYOabOQFp6Vj6W1F80affTUvO9UxmJRx8K0gsfABByQ=
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golang.org/x/sys v0.0.0-20190813064441-fde4db37ae7a/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
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golang.org/x/text v0.3.0 h1:g61tztE5qeGQ89tm6NTjjM9VPIm088od1l6aSorWRWg=
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golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
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@ -630,6 +630,16 @@ func switch_getPacketStreamID(packet []byte) string {
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return string(switch_getPacketCoords(packet))
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}
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// Returns the flowlabel from a given set of coords
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func switch_getFlowLabelFromCoords(in []byte) []byte {
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for i, v := range in {
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if v == 0 {
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return in[i+1:]
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}
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}
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return []byte{}
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}
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// Find the best port for a given set of coords
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func (t *switchTable) bestPortForCoords(coords []byte) switchPort {
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table := t.getTable()
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@ -667,19 +677,28 @@ func (t *switchTable) handleIn(packet []byte, idle map[switchPort]time.Time) boo
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var update bool
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switch {
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case to == nil:
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//nothing
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// no port was found, ignore it
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case !isIdle:
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//nothing
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// the port is busy, ignore it
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case best == nil:
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// this is the first idle port we've found, so select it until we find a
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// better candidate port to use instead
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update = true
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case cinfo.dist < bestDist:
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// the port takes a shorter path/is more direct than our current
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// candidate, so select that instead
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update = true
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case cinfo.dist > bestDist:
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//nothing
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case thisTime.Before(bestTime):
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// the port takes a longer path/is less direct than our current candidate,
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// ignore it
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case thisTime.After(bestTime):
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// all else equal, this port was used more recently than our current
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// candidate, so choose that instead. this should mean that, in low
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// traffic scenarios, we consistently pick the same link which helps with
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// packet ordering
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update = true
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default:
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//nothing
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// the search for a port has finished
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}
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if update {
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best = to
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@ -692,10 +711,9 @@ func (t *switchTable) handleIn(packet []byte, idle map[switchPort]time.Time) boo
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delete(idle, best.port)
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best.sendPacket(packet)
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return true
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} else {
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// Didn't find anyone idle to send it to
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return false
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}
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// Didn't find anyone idle to send it to
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return false
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}
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// Info about a buffered packet
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