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authormichele papalini <micpapal@cisco.com>2019-10-16 10:21:18 +0200
committermichele papalini <micpapal@cisco.com>2019-10-16 10:21:18 +0200
commitd173417e820c98d4a8734703f36dbeb3a82ec03f (patch)
tree2abfd4fec58824496bd5bfe80c31c1d01c16ee30 /libtransport
parent1379eb77c6617513fc73a0b78a0e6666db8767cb (diff)
[HICN-331] schedule rtx at the right time
Signed-off-by: michele papalini <micpapal@cisco.com> Change-Id: Iae4e0bbc5a1e534fd3727d02804aba370378af00
Diffstat (limited to 'libtransport')
-rw-r--r--libtransport/src/hicn/transport/protocols/rtc.cc25
-rw-r--r--libtransport/src/hicn/transport/protocols/rtc.h2
2 files changed, 13 insertions, 14 deletions
diff --git a/libtransport/src/hicn/transport/protocols/rtc.cc b/libtransport/src/hicn/transport/protocols/rtc.cc
index 3e2fe9131..92ef4ffbc 100644
--- a/libtransport/src/hicn/transport/protocols/rtc.cc
+++ b/libtransport/src/hicn/transport/protocols/rtc.cc
@@ -528,7 +528,7 @@ void RTCTransportProtocol::addRetransmissions(uint32_t start, uint32_t stop) {
checkRtx();
}
-void RTCTransportProtocol::retransmit() {
+uint64_t RTCTransportProtocol::retransmit() {
auto it = interestRetransmissions_.begin();
// cut len to max HICN_MAX_RTX_SIZE
@@ -539,6 +539,7 @@ void RTCTransportProtocol::retransmit() {
}
it = interestRetransmissions_.begin();
+ uint64_t smallest_timeout = ULONG_MAX;
while (it != interestRetransmissions_.end()) {
uint32_t pkt = it->first & modMask_;
@@ -596,10 +597,13 @@ void RTCTransportProtocol::retransmit() {
&interest_name);
interest_name->setSuffix(it->first);
sendInterest(interest_name, true);
+ }else if(rtx_time < smallest_timeout){
+ smallest_timeout = rtx_time;
}
++it;
}
+ return smallest_timeout;
}
void RTCTransportProtocol::checkRtx() {
@@ -608,20 +612,15 @@ void RTCTransportProtocol::checkRtx() {
return;
}
- //we use the packet intearriva time on the fastest path
- //even if this stats should be the same on both
- auto pathStats = pathTable_.find(producerPathLabels_[0]);
+ rtx_timer_used_ = true;
+ uint64_t next_timeout = retransmit();
uint64_t wait = 1;
- if(pathStats != pathTable_.end()){
- uint32_t GAP = floor(pathStats->second->getInterArrivalGap() / 2.0);
- uint32_t RTT = floor(pathStats->second->getMinRtt() / 2.0);
- wait = min(RTT,GAP);
- if(wait < 1)
- wait = 1;
+ uint64_t now = std::chrono::duration_cast<std::chrono::milliseconds>(
+ std::chrono::steady_clock::now().time_since_epoch())
+ .count();
+ if(next_timeout != ULONG_MAX && now < next_timeout){
+ wait = next_timeout - now;
}
-
- rtx_timer_used_ = true;
- retransmit();
rtx_timer_->expires_from_now(std::chrono::milliseconds(wait));
rtx_timer_->async_wait([this](std::error_code ec) {
if (ec) return;
diff --git a/libtransport/src/hicn/transport/protocols/rtc.h b/libtransport/src/hicn/transport/protocols/rtc.h
index 509f11361..cac885bc4 100644
--- a/libtransport/src/hicn/transport/protocols/rtc.h
+++ b/libtransport/src/hicn/transport/protocols/rtc.h
@@ -124,7 +124,7 @@ class RTCTransportProtocol : public TransportProtocol, public Reassembly {
void scheduleNextInterests() override;
void addRetransmissions(uint32_t val);
void addRetransmissions(uint32_t start, uint32_t stop);
- void retransmit();
+ uint64_t retransmit();
void checkRtx();
void probeRtt();
void onTimeout(Interest::Ptr &&interest) override;