Opened 12 months ago
Last modified 11 months ago
#2658 new enhancement
PeerState.java: remove _slowStartThreshold
| Reported by: | jogger | Owned by: | zzz |
|---|---|---|---|
| Priority: | minor | Milestone: | undecided |
| Component: | router/transport | Version: | 0.9.43 |
| Keywords: | Cc: | ||
| Parent Tickets: | Sensitive: | no |
Description
As it is coded now _slowStartThreshold lets the send window grow fast until the first retransmission, then drops back and subsequently allows for a single increase or none at all. So it serves no practical use and can be removed, possibly when reworking the send window.
Subtickets
Change History (2)
comment:1 Changed 12 months ago by
| Status: | new → infoneeded_new |
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comment:2 Changed 11 months ago by
| Status: | infoneeded_new → new |
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No, it is not. Works one time, stops working after reset at the first retrans within congestionOccurred(). Will have to come up elsewhere with a writeup why this TCP mimicking is a basic design flaw. Long story short: When we lose a packet it is most likely due to competing TCP which puts much more burden on the equipment. So behaving like TCP means losing out.
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Already marked for removal at line 792, where it's claimed to be unused, but appears to be used at line 1210.
OP says it allows for initial fast growth, and then incremental growth, that's the canonical definition of slow start, so is it working as intended?