Update to bring the rack stack with all its fixes in.

This brings the rack stack up to the current level used at NF. Many fixes
and improvements have been added. I also add in a fix to BBR to deal w

Update to bring the rack stack with all its fixes in.

This brings the rack stack up to the current level used at NF. Many fixes
and improvements have been added. I also add in a fix to BBR to deal with
the changes that have been in hpts for a while i.e. only one call no matter
if mbuf queue or tcp_output.

It basically does little except BBlogs and is a placemark for future work on
doing path capacity measurements.

With a bit of a struggle with git I finally got rack_pcm.c into place (apologies
for not noticing this error). The LINT kernel is running on my box now .. sigh.

Reviewed by: tuexen, glebius
Sponsored by: Netflix Inc.
Differential Revision:https://reviews.freebsd.org/D43986

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Revert "Update to bring the rack stack with all its fixes in."

This commit was incomplete and breaks LINT kernels. The tree has been
broken for 8+ hours.

This reverts commit f6d489f402c320f1a6eaa4

Revert "Update to bring the rack stack with all its fixes in."

This commit was incomplete and breaks LINT kernels. The tree has been
broken for 8+ hours.

This reverts commit f6d489f402c320f1a6eaa473491a0b8c3878113e.

show more ...

Update to bring the rack stack with all its fixes in.

This brings the rack stack up to the current level used at NF. Many fixes
and improvements have been added. I also add in a fix to BBR to deal w

Update to bring the rack stack with all its fixes in.

This brings the rack stack up to the current level used at NF. Many fixes
and improvements have been added. I also add in a fix to BBR to deal with
the changes that have been in hpts for a while i.e. only one call no matter
if mbuf queue or tcp_output.

Note there is a new file that I can't figure out how to get in rack_pcm.c

It basically does little except BBlogs and is a placemark for future work on
doing path capacity measurements.

Reviewed by: tuexen, glebius
Sponsored by: Netflix Inc.
Differential Revision:https://reviews.freebsd.org/D43986

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netinet: The tailq_hash code doesn't reference tcpoutflags

Don't define TCPOUTFLAGS to get the static definition from tcp_fsm.h.
tailq_hash.c doesn't refernce tcpoutflag. Only files that reference t

netinet: The tailq_hash code doesn't reference tcpoutflags

Don't define TCPOUTFLAGS to get the static definition from tcp_fsm.h.
tailq_hash.c doesn't refernce tcpoutflag. Only files that reference this
should define TCPOUTFLAGS. clang is fine with it, but gcc12 complained.

Sponsored by: Netflix

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sys: Remove $FreeBSD$: one-line .c pattern

Remove /^[\s*]*__FBSDID\("\$FreeBSD\$"\);?\s*\n/

Update rack to the latest code used at NF.

There have been many changes to rack over the last couple of years, including:
a) Ability when switching stacks to have one stack query another.

Update rack to the latest code used at NF.

There have been many changes to rack over the last couple of years, including:
a) Ability when switching stacks to have one stack query another.
b) Internal use of micro-second timers instead of ticks.
c) Many changes to pacing in forms of
1) Improvements to Dynamic Goodput Pacing (DGP)
2) Improvements to fixed rate paciing
3) A new feature called hybrid pacing where the requestor can
get a combination of DGP and fixed rate pacing with deadlines
for delivery that can dynamically speed things up.
d) All kinds of bugs found during extensive testing and use of the
rack stack for streaming video and in fact all data transferred
by NF

Reviewed by: glebius, gallatin, tuexen
Sponsored By: Netflix Inc.
Differential Revision: https://reviews.freebsd.org/D39402

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