Free Knowledge Resources


Linux Manual Pages


Free Software * Books

Source Code

Free Media

Linux

tc-hfsc(8)


NAME

   HFSC - Hierarchical Fair Service Curve's control under linux

SYNOPSIS

   tc qdisc add ... hfsc [ default CLASSID ]

   tc class add ... hfsc [ [ rt SC ] [ ls SC ] | [ sc SC ] ] [ ul SC ]

   rt : realtime service curve
   ls : linkshare service curve
   sc : rt+ls service curve
   ul : upperlimit service curve

   * at least one of rt, ls or sc must be specified
   * ul can only be specified with ls or sc

   SC := [ [ m1 BPS ] d SEC ] m2 BPS
          m1 : slope of the first segment
          d  : x-coordinate of intersection
          m2 : slope of the second segment

   SC := [ [ umax BYTE ] dmax SEC ] rate BPS
          umax : maximum unit of work
          dmax : maximum delay
          rate : rate

   For  description  of  BYTE,  BPS  and SEC - please see UNITS section of
   tc(8).

DESCRIPTION (qdisc)

   HFSC qdisc has only one optional parameter - default. CLASSID specifies
   the  minor part of the default classid, where packets not classified by
   other means (e.g. u32 filter, CLASSIFY  target  of  iptables)  will  be
   enqueued.  If  default  is  not specified, unclassified packets will be
   dropped.

DESCRIPTION (class)

   HFSC class is used to create a class hierarchy for HFSC scheduler.  For
   explanation  of the algorithm, and the meaning behind rt, ls, sc and ul
   service curves - please refer to tc-hfsc(7).

   As you can see in SYNOPSIS, service curve (SC) can be specified in  two
   ways.  Either  as  maximum  delay  for  certain amount of work, or as a
   bandwidth assigned for certain amount of time. Obviously, m1 is  simply
   umax/dmax.

   Both  m2 and rate are mandatory. If you omit other parameters, you will
   specify linear service curve.

SEE ALSO

   tc(8), tc-hfsc(7), tc-stab(8)

   Please direct bugreports and patches to: <net...@vger.kernel.org>

AUTHOR

   Manpage created by Michal Soltys (sol...@ziu.info)



Opportunity


Personal Opportunity - Free software gives you access to billions of dollars of software at no cost. Use this software for your business, personal use or to develop a profitable skill. Access to source code provides access to a level of capabilities/information that companies protect though copyrights. Open source is a core component of the Internet and it is available to you. Leverage the billions of dollars in resources and capabilities to build a career, establish a business or change the world. The potential is endless for those who understand the opportunity.

Business Opportunity - Goldman Sachs, IBM and countless large corporations are leveraging open source to reduce costs, develop products and increase their bottom lines. Learn what these companies know about open source and how open source can give you the advantage.



Free Software


Free Software provides computer programs and capabilities at no cost but more importantly, it provides the freedom to run, edit, contribute to, and share the software. The importance of free software is a matter of access, not price. Software at no cost is a benefit but ownership rights to the software and source code is far more significant.

Free Office Software - The Libre Office suite provides top desktop productivity tools for free. This includes, a word processor, spreadsheet, presentation engine, drawing and flowcharting, database and math applications. Libre Office is available for Linux or Windows.



Free Books


The Free Books Library is a collection of thousands of the most popular public domain books in an online readable format. The collection includes great classical literature and more recent works where the U.S. copyright has expired. These books are yours to read and use without restrictions.

Source Code - Want to change a program or know how it works? Open Source provides the source code for its programs so that anyone can use, modify or learn how to write those programs themselves. Visit the GNU source code repositories to download the source.



Education


Study at Harvard, Stanford or MIT - Open edX provides free online courses from Harvard, MIT, Columbia, UC Berkeley and other top Universities. Hundreds of courses for almost all major subjects and course levels. Open edx also offers some paid courses and selected certifications.

Linux Manual Pages - A man or manual page is a form of software documentation found on Linux/Unix operating systems. Topics covered include computer programs (including library and system calls), formal standards and conventions, and even abstract concepts.


birds banner