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Matt Macy 3554f22e67 pmc: Add new sub-command structured "pmc" utility 
This will manage pmc functionality with a more
manageable structure of subcommands rather than the
gradually accreted spaghetti logic of overlapping flags
that exists in pmcstat.

This is intended to ultimately have all the same functionality
as pmcannotate+pmccontrol+pmcstat. Currently it just has
"stat" and "system-stat" - counters for the process itself and counters
for the system as a whole respectively (i.e. system-stat includes kernel
threads). Note that the rusage results (page faults/context switches/
user/sys) for stat-system will not account for the system as a whole -
only for the child process specified on the command line.

Implementing stat was suggested by mjg@ and the output is based on that
from Linux's "perf stat".

% pmc stat -- make -j32 buildkernel -DNO_MODULES  -ss > /dev/null
         9598393  page faults           #       0.674 M/sec
          387085  voluntary csw         #       0.027 M/sec
          106989  involuntary csw       #       0.008 M/sec
   2763965982317  cycles
   2542953049760  instructions          #       0.920 inst/cycle
    511562750157  branches
     12917006881  branch-misses         #       2.525%
     17944429878  cache-references      #       0.007 refs/inst
      2205119560  cache-misses          #       12.289%
           43.74  real                  #       2019.72% cpu
          795.09  user                  #       1817.72% cpu
           88.35  sys                   #       202.00% cpu

% make -j32 buildkernel -DNO_MODULES  -ss > /dev/null &
% sudo pmc stat-system cat
^C             103  page faults         #       0.811 M/sec
               4  voluntary csw         #       0.031 M/sec
               0  involuntary csw       #       0.000 M/sec
   2843639070514  cycles
   2606171217438  instructions          #       0.916 inst/cycle
    522450422783  branches
     13092862839  branch-misses         #       2.506%
     18592101113  cache-references      #       0.007 refs/inst
      2562878667  cache-misses          #       13.785%
           44.85  real                  #       0.00% cpu
            0.00  user                  #       0.00% cpu
            0.00  sys                   #       0.00% cpu
2018-05-29 20:28:34 +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): Eliminate ANSI dimming in developer mode 2018-05-27 22:32:45 +00:00
contrib MFV r333668: 2018-05-29 10:29:04 +00:00
crypto Merge upstream patch to unbreak tunnel forwarding. 2018-05-16 14:04:39 +00:00
etc Complete removal of lmc(4) 2018-05-28 17:08:37 +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 libpmc: don't return -1 on success in pmc_allocate 2018-05-29 20:09:35 +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 The extension for zstd-compressed files is ".zst". 2018-05-29 16:04:53 +00:00
secure Upgrade to OpenSSH 7.7p1. 2018-05-11 13:22:43 +00:00
share Add support for hardware rate limiting to mlx5en(4). 2018-05-29 14:04:57 +00:00
stand Teach ufs_module.c about bsd labels and probe 'a' partition. 2018-05-29 03:58:29 +00:00
sys Correct pointer subtraction in KASSERT(). 2018-05-29 20:03:24 +00:00
targets Add kernel and userspace code to dump the firmware state of supported 2018-03-08 15:21:56 +00:00
tests Export a breakpoint() function to userland for riscv. 2018-05-16 16:56:35 +00:00
tools src.conf: use more natural language for @generated 2018-05-26 21:14:49 +00:00
usr.bin logger: fix memory leak and use-after-free 2018-05-28 02:40:06 +00:00
usr.sbin pmc: Add new sub-command structured "pmc" utility 2018-05-29 20:28:34 +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 pmc(3)/hwpmc(4): update supported Intel processors to rely fully on the 2018-05-26 19:29:19 +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 UPDATING: remove EOL whitespace in 20180523 entry 2018-05-24 17:08:55 +00:00

README.md

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