Green-Sky/solanaceae_ngc_ft1
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only decrease window on congestion if prev max window was not yet reached yet

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Green Sky 2023-10-16 19:51:56 +02:00
parent a80e74065c
commit 7c16c54649
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1 changed files with 12 additions and 4 deletions
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solanaceae/ngc_ft1/cubic.cpp
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@ -33,16 +33,24 @@ float CUBIC::getCWnD(void) const {
} }
void CUBIC::onCongestion(void) { void CUBIC::onCongestion(void) {
// 8 is probably too much (800ms for 100ms rtt)
if (getTimeNow() - _time_point_reduction >= getCurrentDelay()*4.f) { if (getTimeNow() - _time_point_reduction >= getCurrentDelay()*4.f) {
const auto tmp_old_tp = getTimeNow() - _time_point_reduction; const auto tmp_old_tp = getTimeNow() - _time_point_reduction;
const auto current_cwnd = getCWnD(); const auto current_cwnd = getCWnD(); // TODO: remove, only used by logging?
const auto current_wnd = getWindow(); // respects cwnd and fwnd const auto current_wnd = getWindow(); // respects cwnd and fwnd
_time_point_reduction = getTimeNow(); _time_point_reduction = getTimeNow();
//_window_max = current_cwnd * BETA;
_window_max = current_wnd * BETA; if (current_cwnd < _window_max) {
_window_max = std::max(_window_max, 2.*MAXIMUM_SEGMENT_SIZE); // congestion before reaching the inflection point (prev window_max).
// reduce to wnd*beta to be fair
_window_max = current_wnd * BETA;
} else {
_window_max = current_wnd;
}
_window_max = std::max(_window_max, 2.0*MAXIMUM_SEGMENT_SIZE);
#if 1 #if 1
std::cout << "----CONGESTION!" std::cout << "----CONGESTION!"