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f8b697c19b
This patch fixes the loss of information when computing the delivery rate (quic_cc_drs.c) on links with very low latency due to usage of 32bits variables with the millisecond as precision. Initialize the quic_conn task with TASK_F_WANTS_TIME flag ask it to ask the scheduler to update the call date of this task. This allows this task to get a nanosecond resolution on the call date calling task_mono_time(). This is enabled only for congestion control algorithms with delivery rate estimation support (BBR only at this time). Store the send date with nanosecond precision of each TX packet into ->time_sent_ns new quic_tx_packet struct member to store the date a packet was sent in nanoseconds thanks to task_mono_time(). Make use of this new timestamp by the delivery rate estimation algorithm (quic_cc_drs.c). Rename current ->time_sent member from quic_tx_packet struct to ->time_sent_ms to distinguish the unit used by this variable (millisecond) and update the code which uses this variable. The logic found in quic_loss.c is not modified at all. Must be backported to 3.1. |
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