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Differential D4366

convert tcp timestamps to scaled sbintime
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Authored by kmacy on Dec 4 2015, 2:04 AM.
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F156849659: D4366.id10756.diff
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F156823937: D4366.id10717.diff
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rstone
rwatson
transport

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Reviewers
rrs
lstewart
Group Reviewers
transport
Summary
  • convert tcp timestamps to using a scaled sbintime based off of the TSC

See the following paper for background:
Safe and Effective Fine-grained TCP Retransmissions for Datacenter Communication

NB: this a first iteration and still needs to be extended to support unsynchronized TSCs and refactor the MD bits more appropriately

Test Plan

Compare the incast mitigation effects of sub-millisecond RTO versus legacy tick based timestamps

Diff Detail

Repository
rS FreeBSD src repository - subversion
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kmacy updated this revision to Diff 10717.Dec 4 2015, 2:04 AM
kmacy retitled this revision from to convert tcp timestamps to scaled sbintime.
kmacy updated this object.
kmacy edited the test plan for this revision. (Show Details)
kmacy added a reviewer: lstewart.
kmacy set the repository for this revision to rS FreeBSD src repository - subversion.
kmacy added a project: transport.
kmacy added subscribers: benno, gnn, rwatson.
Herald added a subscriber: imp. · View Herald TranscriptDec 4 2015, 2:04 AM
rstone added a subscriber: rstone.Dec 4 2015, 3:24 AM
jch added a subscriber: jch.Dec 4 2015, 11:57 AM
kmacy updated this revision to Diff 10756.Dec 5 2015, 6:33 AM

convert tcp_timer_activate to sbintime

kmacy updated this revision to Diff 10757.Dec 5 2015, 6:34 AM

restore 40 line context

hiren added a reviewer: rrs.Oct 4 2016, 12:45 AM
hiren added a subscriber: transport.
kmacy added a comment.May 3 2018, 3:55 AM

@lstewart is this worth updating or should I just abandon?

Herald added a reviewer: transport. · View Herald TranscriptMay 3 2018, 3:55 AM
kmacy abandoned this revision.May 7 2018, 8:00 AM

Revision Contents
Changeset List

PathSize
sys/
amd64/
include/
2 lines
netinet/
93 lines
11 lines
68 lines
28 lines
10 lines
5 lines
41 lines
2 lines
30 lines
22 lines
2 lines
sys/
2 lines
x86/
x86/
31 lines

Diff 10757

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sys/amd64/include/clock.h

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sys/netinet/tcp_input.c

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sys/netinet/tcp_output.c

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sys/netinet/tcp_seq.h

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sys/netinet/tcp_subr.c

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sys/netinet/tcp_syncache.c

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sys/netinet/tcp_timer.h

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sys/netinet/tcp_timer.c

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sys/netinet/tcp_timewait.c

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sys/netinet/tcp_usrreq.c

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sys/netinet/tcp_var.h

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sys/netinet/toecore.c

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sys/sys/callout.h

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sys/x86/x86/tsc.c

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