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b84460432a
reached end of a block of journal items or read all of journal items. lfjour_cleanup_hook() can clean only journal items every recipient has processed, so it was often called uselessly. This commit restricts most of the unusefull scheduling. Only some consumers are given a token alowing them to try to schedule the lfjour_cleanup_hook(). When a consumer wants to schedule the lfjour_cleanup_hook(), it checks whether it has a token. If yes, it decrements number of tokens the journal has given (issued_tokens) and discards its own token. If issued_tokens reaches zero, the consumer is allowed do schedule the lfjour_cleanup_hook(). There is a maximum number of tokens a journal can give to its customers (max_tokens). A new customer is given a token in its init, if the maximum number of tokens was not reached. The rest of tokens is given to customers in lfjour_cleanup_hook(). In lf_jour_cleanup_hook(), it is increased the issued_tokens number in order not to call the hook before it finishes. Then, tokens are given to the slowest recipients (but never to more than max_token recipients). Before leaving lfjour_cleanup_hook(), the issued_tokens number is decreased. If no other tokens are given, we have to make sure the lfjour_cleanup_hook will be called again. If every item in journal was read by every recipient, tokens are given to random recipients. If all recipients with tokens managed to finish until now, we give the token to first unfinished customer we find or we call the hook again.
BIRD Internet Routing Daemon
Home page http://bird.network.cz/
Mailing list bird-users@network.cz
(c) 1998--2008 Martin Mares <mj@ucw.cz>
(c) 1998--2000 Pavel Machek <pavel@ucw.cz>
(c) 1998--2008 Ondrej Filip <feela@network.cz>
(c) 2009--2019 CZ.NIC z.s.p.o.
================================================================================
The BIRD project aims to develop a dynamic IP routing daemon with full support
of all modern routing protocols, easy to use configuration interface and
powerful route filtering language, primarily targeted on (but not limited to)
Linux and other UNIX-like systems and distributed under the GNU General
Public License.
What do we support
==================
o Both IPv4 and IPv6
o Multiple routing tables
o Border Gateway Protocol (BGPv4)
o Routing Information Protocol (RIPv2, RIPng)
o Open Shortest Path First protocol (OSPFv2, OSPFv3)
o Babel Routing Protocol (Babel)
o Bidirectional Forwarding Detection (BFD)
o IPv6 router advertisements
o Static routes
o Inter-table protocol
o Command-line interface allowing on-line control and inspection of
status of the daemon
o Soft reconfiguration, no need to use complex online commands to
change the configuration, just edit the configuration file and notify
BIRD to re-read it and it will smoothly switch itself to the new
configuration, not disturbing routing protocols unless they are
affected by the configuration changes
o Powerful language for route filtering, see doc/bird.conf.example
o Linux, FreeBSD, NetBSD and OpenBSD ports
How to install BIRD
===================
o From standard distribution package of your OS (recommended)
o From official binary packages for Debian and Red Hat Linux
ftp://bird.network.cz/pub/bird/debian/
ftp://bird.network.cz/pub/bird/redhat/
o From source code of the latest stable release version
ftp://bird.network.cz/pub/bird/
o From current development code in Git repository
https://gitlab.labs.nic.cz/labs/bird/
See the file INSTALL for information about installation from source code.
Documentation
=============
Online documentation is available at http://bird.network.cz/?get_doc or as HTML
files in the doc directory, you can install it by `make install-docs' and
rebuild it by `make docs', but you'll need SGMLtools and LaTeX to be installed
on your machine. You can also download a neatly formatted PDF version as
a separate archive (bird-doc-*.tar.gz) from ftp://bird.network.cz/pub/bird/
User support
============
If you want to help us debugging, enhancing and porting BIRD or just lurk
around to see what's going to develop, feel free to subscribe to the BIRD
users mailing list bird-users@network.cz, just send `subscribe' to
bird-request@network.cz.
Subscribe: http://bird.network.cz/mailman/listinfo/bird-users/
Archive: http://bird.network.cz/pipermail/bird-users/
Please don't send security issues to the mailing-list, contact us instead at
bird-support@network.cz which is a private e-mail address where you also can
get commercial support for your BIRD deployment.
We don't use our gitlab issues for reporting but we're partially tracking
the core developent team's work there publicly.
Contributing
============
Please see the CONTRIBUTING.md file to find how to contribute to BIRD.
Licence
=======
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
History
=======
BIRD development started as a student project at the Faculty of Math
and Physics, Charles University, Prague, Czech Republic under supervision
of RNDr. Libor Forst <forst@cuni.cz>. BIRD has been developed and supported
by CZ.NIC z.s.p.o. http://www.nic.cz/ since 2009.
Good Luck and enjoy the BIRD :)
The BIRD Team