rfc9406v2.txt   rfc9406.txt 
skipping to change at line 225 skipping to change at line 225
cwnd = cwnd + (min(N, L * SMSS) / CSS_GROWTH_DIVISOR) cwnd = cwnd + (min(N, L * SMSS) / CSS_GROWTH_DIVISOR)
Keep track of the minimum observed RTT: Keep track of the minimum observed RTT:
currentRoundMinRTT = min(currentRoundMinRTT, currRTT) currentRoundMinRTT = min(currentRoundMinRTT, currRTT)
rttSampleCount += 1 rttSampleCount += 1
For CSS rounds where at least N_RTT_SAMPLE RTT samples have been For CSS rounds where at least N_RTT_SAMPLE RTT samples have been
obtained, check to see if the current round's minRTT drops below obtained, check to see if the current round's minRTT drops below
baseline (cssBaselineMinRtt) indicating that HyStart exit was baseline (cssBaselineMinRtt) indicating that slow start exit was
spurious: spurious:
if (currentRoundMinRTT < cssBaselineMinRtt) if (currentRoundMinRTT < cssBaselineMinRtt)
cssBaselineMinRtt = infinity cssBaselineMinRtt = infinity
resume slow start including HyStart++ resume slow start including HyStart++
CSS lasts at most CSS_ROUNDS rounds. If the transition into CSS CSS lasts at most CSS_ROUNDS rounds. If the transition into CSS
happens in the middle of a round, that partial round counts towards happens in the middle of a round, that partial round counts towards
the limit. the limit.
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Yi Huang Yi Huang
Microsoft Microsoft
One Microsoft Way One Microsoft Way
Redmond, WA 98052 Redmond, WA 98052
United States of America United States of America
Phone: +1 425 703 0447 Phone: +1 425 703 0447
Email: huanyi@microsoft.com Email: huanyi@microsoft.com
Matt Olson Matt Olson
Microsoft Microsoft
One Microsoft Way
Redmond, WA 98052
United States of America
Phone: +1 425 538 8598 Phone: +1 425 538 8598
Email: maolson@microsoft.com Email: maolson@microsoft.com
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