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Matt Macy a6bc59f203 Reduce overhead of entropy collection
- move harvest mask check inline
- move harvest mask to frequently_read out of actively
  modified cache line
- disable ether_input collection and describe its limitations
  in NOTES

Typically entropy collection in ether_input was stirring zero
in to the entropy pool while at the same time greatly reducing
max pps. This indicates that perhaps we should more closely
scrutinize how much entropy we're getting from a given source
as well as what our actual entropy collection needs are for
seeding Yarrow.

Reviewed by: cem, gallatin, delphij
Approved by: secteam
Differential Revision: https://reviews.freebsd.org/D15526
2018-05-31 21:53:07 +00:00
bin sh: Split CNL syntax category to avoid a check on state[level].syntax 2018-05-21 21:52:48 +00:00
cddl dwatch(1): Fix "-t test" for post-processing profiles 2018-05-29 22:36:37 +00:00
contrib Re-apply r190640. 2018-05-31 09:11:21 +00:00
crypto Merge upstream patch to unbreak tunnel forwarding. 2018-05-16 14:04:39 +00:00
etc Add initial set of tests for audit(4) 2018-05-29 23:08:33 +00:00
gnu Use a script wrapper for <compress>grep 2018-04-25 13:23:58 +00:00
include Add time2posix and posix2time to time.h 2018-05-25 13:40:05 +00:00
kerberos5 various: general adoption of SPDX licensing ID tags. 2017-11-27 15:37:16 +00:00
lib Resolve conflicts between macros in fenv.h and ieeefp.h 2018-05-31 20:22:47 +00:00
libexec Make rtld use libc_nossp_pic.a. Remove SSP shims. 2018-05-09 10:30:56 +00:00
release switch amd64 memstick installer images to MBR 2018-05-29 15:06:13 +00:00
rescue Avoid referencing private lib names directly. 2017-11-10 07:53:02 +00:00
sbin dhclient(8): allow to supersede interface-mtu option 2018-05-31 19:36:24 +00:00
secure Upgrade to OpenSSH 7.7p1. 2018-05-11 13:22:43 +00:00
share Depart from normal man page proactice a little and provide guidance on 2018-05-31 14:23:33 +00:00
stand Fix build of stand with base gcc 2018-05-31 14:38:13 +00:00
sys Reduce overhead of entropy collection 2018-05-31 21:53:07 +00:00
targets Add kernel and userspace code to dump the firmware state of supported 2018-03-08 15:21:56 +00:00
tests Revert r334362 2018-05-30 19:58:36 +00:00
tools makeroot.sh: allow duplicate entries even with -f <filelist> 2018-05-30 13:51:00 +00:00
usr.bin elfdump: chase ABI tag note name change from r232832 2018-05-30 01:16:50 +00:00
usr.sbin Re-apply r190640. 2018-05-31 09:11:21 +00:00
.arcconfig callsign isn't required anymore 2016-09-29 06:19:45 +00:00
.arclint arc lint: ignore /tests/ in chmod 2017-12-19 03:38:06 +00:00
.gitattributes .git*: add gitattributes and gitignore 2017-12-25 21:07:54 +00:00
.gitignore .git*: add gitattributes and gitignore 2017-12-25 21:07:54 +00:00
COPYRIGHT Remove 'All Rights Reserved' from the collection copyright and templates. 2018-05-09 02:02:49 +00:00
LOCKS Explicitly require Security Officer's approval for kernel PRNG bits. 2013-09-17 14:19:05 +00:00
MAINTAINERS top(1): add myself as a MAINTAIENR 2018-05-21 05:00:19 +00:00
Makefile Restore arm, riscv, sparc64, and mips to UNIVERSE after r334128 2018-05-24 14:01:22 +00:00
Makefile.inc1 libpmc/jevents: fix cross-compile _to_ amd64 2018-05-31 01:01:35 +00:00
Makefile.libcompat X_COMPILER_* may not be defined. 2018-01-24 18:08:37 +00:00
Makefile.sys.inc AUTO_OBJ: For all top-level targets enforce using an OBJDIR. 2017-12-05 21:29:47 +00:00
ObsoleteFiles.inc Retire vxge(4). 2018-05-17 14:55:41 +00:00
README README: Reduce the textdump; describe the project 2018-05-23 04:09:01 +00:00
README.md README: Reduce the textdump; describe the project 2018-05-23 04:09:01 +00:00
UPDATING Note the need for a new kernel / userland for devinfo to work 2018-05-31 02:58:08 +00:00

FreeBSD Source:

This is the top level of the FreeBSD source directory. This file was last revised on: FreeBSD

FreeBSD is an operating system used to power modern servers, desktops, and embedded platforms. A large community has continually developed it for more than thirty years. Its advanced networking, security, and storage features have made FreeBSD the platform of choice for many of the busiest web sites and most pervasive embedded networking and storage devices.

For copyright information, please see the file COPYRIGHT in this directory. Additional copyright information also exists for some sources in this tree - please see the specific source directories for more information.

The Makefile in this directory supports a number of targets for building components (or all) of the FreeBSD source tree. See build(7), config(8), https://www.freebsd.org/doc/en_US.ISO8859-1/books/handbook/makeworld.html, and https://www.freebsd.org/doc/en_US.ISO8859-1/books/handbook/kernelconfig.html for more information, including setting make(1) variables.

Source Roadmap:

bin		System/user commands.

cddl		Various commands and libraries under the Common Development
		and Distribution License.

contrib		Packages contributed by 3rd parties.

crypto		Cryptography stuff (see crypto/README).

etc		Template files for /etc.

gnu		Various commands and libraries under the GNU Public License.
		Please see gnu/COPYING* for more information.

include		System include files.

kerberos5	Kerberos5 (Heimdal) package.

lib		System libraries.

libexec		System daemons.

release		Release building Makefile & associated tools.

rescue		Build system for statically linked /rescue utilities.

sbin		System commands.

secure		Cryptographic libraries and commands.

share		Shared resources.

stand		Boot loader sources.

sys		Kernel sources.

sys/<arch>/conf Kernel configuration file

tests		Regression tests which can be run by Kyua.  See tests/README
		for additional information.

tools		Utilities for regression testing and miscellaneous tasks.

usr.bin		User commands.

usr.sbin	System administration commands.

For information on synchronizing your source tree with one or more of the FreeBSD Project's development branches, please see:

https://www.freebsd.org/doc/en_US.ISO8859-1/books/handbook/current-stable.html