€•W6      Œsphinx.addnodes”Œdocument”“”)”}”(Œ	rawsource”Œ ”Œchildren”]”(Œtranslations”ŒLanguagesNode”“”)”}”(hhh]”(h Œpending_xref”“”)”}”(hhh]”Œdocutils.nodes”ŒText”“”ŒChinese (Simplified)”…””}”Œparent”hsbaŒ
attributes”}”(Œids”]”Œclasses”]”Œnames”]”Œdupnames”]”Œbackrefs”]”Œ	refdomain”Œstd”Œreftype”Œdoc”Œ	reftarget”Œ)/translations/zh_CN/networking/multiqueue”Œmodname”NŒ	classname”NŒrefexplicit”ˆuŒtagname”hhhubh)”}”(hhh]”hŒChinese (Traditional)”…””}”hh2sbah}”(h]”h ]”h"]”h$]”h&]”Œ	refdomain”h)Œreftype”h+Œ	reftarget”Œ)/translations/zh_TW/networking/multiqueue”Œmodname”NŒ	classname”NŒrefexplicit”ˆuh1hhhubh)”}”(hhh]”hŒItalian”…””}”hhFsbah}”(h]”h ]”h"]”h$]”h&]”Œ	refdomain”h)Œreftype”h+Œ	reftarget”Œ)/translations/it_IT/networking/multiqueue”Œmodname”NŒ	classname”NŒrefexplicit”ˆuh1hhhubh)”}”(hhh]”hŒJapanese”…””}”hhZsbah}”(h]”h ]”h"]”h$]”h&]”Œ	refdomain”h)Œreftype”h+Œ	reftarget”Œ)/translations/ja_JP/networking/multiqueue”Œmodname”NŒ	classname”NŒrefexplicit”ˆuh1hhhubh)”}”(hhh]”hŒKorean”…””}”hhnsbah}”(h]”h ]”h"]”h$]”h&]”Œ	refdomain”h)Œreftype”h+Œ	reftarget”Œ)/translations/ko_KR/networking/multiqueue”Œmodname”NŒ	classname”NŒrefexplicit”ˆuh1hhhubh)”}”(hhh]”hŒSpanish”…””}”hh‚sbah}”(h]”h ]”h"]”h$]”h&]”Œ	refdomain”h)Œreftype”h+Œ	reftarget”Œ)/translations/sp_SP/networking/multiqueue”Œmodname”NŒ	classname”NŒrefexplicit”ˆuh1hhhubeh}”(h]”h ]”h"]”h$]”h&]”Œcurrent_language”ŒEnglish”uh1h
hhŒ	_document”hŒsource”NŒline”NubhŒcomment”“”)”}”(hŒ SPDX-License-Identifier: GPL-2.0”h]”hŒ SPDX-License-Identifier: GPL-2.0”…””}”hh£sbah}”(h]”h ]”h"]”h$]”h&]”Œ	xml:space”Œpreserve”uh1h¡hhhžhhŸŒC/var/lib/git/docbuild/linux/Documentation/networking/multiqueue.rst”h KubhŒsection”“”)”}”(hhh]”(hŒtitle”“”)”}”(hŒ+HOWTO for multiqueue network device support”h]”hŒ+HOWTO for multiqueue network device support”…””}”(hh»hžhhŸNh Nubah}”(h]”h ]”h"]”h$]”h&]”uh1h¹hh¶hžhhŸh³h Kubhµ)”}”(hhh]”(hº)”}”(hŒGSection 1: Base driver requirements for implementing multiqueue support”h]”hŒGSection 1: Base driver requirements for implementing multiqueue support”…””}”(hhÌhžhhŸNh Nubah}”(h]”h ]”h"]”h$]”h&]”uh1h¹hhÉhžhhŸh³h Kubhµ)”}”(hhh]”(hº)”}”(hŒ,Intro: Kernel support for multiqueue devices”h]”hŒ,Intro: Kernel support for multiqueue devices”…””}”(hhÝhžhhŸNh Nubah}”(h]”h ]”h"]”h$]”h&]”uh1h¹hhÚhžhhŸh³h KubhŒ	paragraph”“”)”}”(hŒ8Kernel support for multiqueue devices is always present.”h]”hŒ8Kernel support for multiqueue devices is always present.”…””}”(hhíhžhhŸNh Nubah}”(h]”h ]”h"]”h$]”h&]”uh1hëhŸh³h KhhÚhžhubhì)”}”(hX/  Base drivers are required to use the new alloc_etherdev_mq() or
alloc_netdev_mq() functions to allocate the subqueues for the device.  The
underlying kernel API will take care of the allocation and deallocation of
the subqueue memory, as well as netdev configuration of where the queues
exist in memory.”h]”hX/  Base drivers are required to use the new alloc_etherdev_mq() or
alloc_netdev_mq() functions to allocate the subqueues for the device.  The
underlying kernel API will take care of the allocation and deallocation of
the subqueue memory, as well as netdev configuration of where the queues
exist in memory.”…””}”(hhûhžhhŸNh Nubah}”(h]”h ]”h"]”h$]”h&]”uh1hëhŸh³h KhhÚhžhubhì)”}”(hXq  The base driver will also need to manage the queues as it does the global
netdev->queue_lock today.  Therefore base drivers should use the
netif_{start|stop|wake}_subqueue() functions to manage each queue while the
device is still operational.  netdev->queue_lock is still used when the device
comes online or when it's completely shut down (unregister_netdev(), etc.).”h]”hXs  The base driver will also need to manage the queues as it does the global
netdev->queue_lock today.  Therefore base drivers should use the
netif_{start|stop|wake}_subqueue() functions to manage each queue while the
device is still operational.  netdev->queue_lock is still used when the device
comes online or when itâ€™s completely shut down (unregister_netdev(), etc.).”…””}”(hj	  hžhhŸNh Nubah}”(h]”h ]”h"]”h$]”h&]”uh1hëhŸh³h KhhÚhžhubeh}”(h]”Œ+intro-kernel-support-for-multiqueue-devices”ah ]”h"]”Œ,intro: kernel support for multiqueue devices”ah$]”h&]”uh1h´hhÉhžhhŸh³h Kubeh}”(h]”ŒFsection-1-base-driver-requirements-for-implementing-multiqueue-support”ah ]”h"]”ŒGsection 1: base driver requirements for implementing multiqueue support”ah$]”h&]”uh1h´hh¶hžhhŸh³h Kubhµ)”}”(hhh]”(hº)”}”(hŒ/Section 2: Qdisc support for multiqueue devices”h]”hŒ/Section 2: Qdisc support for multiqueue devices”…””}”(hj*  hžhhŸNh Nubah}”(h]”h ]”h"]”h$]”h&]”uh1h¹hj'  hžhhŸh³h Kubhì)”}”(hXÃ  Currently two qdiscs are optimized for multiqueue devices.  The first is the
default pfifo_fast qdisc.  This qdisc supports one qdisc per hardware queue.
A new round-robin qdisc, sch_multiq also supports multiple hardware queues. The
qdisc is responsible for classifying the skb's and then directing the skb's to
bands and queues based on the value in skb->queue_mapping.  Use this field in
the base driver to determine which queue to send the skb to.”h]”hXÇ  Currently two qdiscs are optimized for multiqueue devices.  The first is the
default pfifo_fast qdisc.  This qdisc supports one qdisc per hardware queue.
A new round-robin qdisc, sch_multiq also supports multiple hardware queues. The
qdisc is responsible for classifying the skbâ€™s and then directing the skbâ€™s to
bands and queues based on the value in skb->queue_mapping.  Use this field in
the base driver to determine which queue to send the skb to.”…””}”(hj8  hžhhŸNh Nubah}”(h]”h ]”h"]”h$]”h&]”uh1hëhŸh³h Khj'  hžhubhì)”}”(hŒÚsch_multiq has been added for hardware that wishes to avoid head-of-line
blocking.  It will cycle though the bands and verify that the hardware queue
associated with the band is not stopped prior to dequeuing a packet.”h]”hŒÚsch_multiq has been added for hardware that wishes to avoid head-of-line
blocking.  It will cycle though the bands and verify that the hardware queue
associated with the band is not stopped prior to dequeuing a packet.”…””}”(hjF  hžhhŸNh Nubah}”(h]”h ]”h"]”h$]”h&]”uh1hëhŸh³h K&hj'  hžhubhì)”}”(hŒ×On qdisc load, the number of bands is based on the number of queues on the
hardware.  Once the association is made, any skb with skb->queue_mapping set,
will be queued to the band associated with the hardware queue.”h]”hŒ×On qdisc load, the number of bands is based on the number of queues on the
hardware.  Once the association is made, any skb with skb->queue_mapping set,
will be queued to the band associated with the hardware queue.”…””}”(hjT  hžhhŸNh Nubah}”(h]”h ]”h"]”h$]”h&]”uh1hëhŸh³h K*hj'  hžhubeh}”(h]”Œ.section-2-qdisc-support-for-multiqueue-devices”ah ]”h"]”Œ/section 2: qdisc support for multiqueue devices”ah$]”h&]”uh1h´hh¶hžhhŸh³h Kubhµ)”}”(hhh]”(hº)”}”(hŒ:Section 3: Brief howto using MULTIQ for multiqueue devices”h]”hŒ:Section 3: Brief howto using MULTIQ for multiqueue devices”…””}”(hjm  hžhhŸNh Nubah}”(h]”h ]”h"]”h$]”h&]”uh1h¹hjj  hžhhŸh³h K0ubhì)”}”(hŒÇThe userspace command 'tc,' part of the iproute2 package, is used to configure
qdiscs.  To add the MULTIQ qdisc to your network device, assuming the device
is called eth0, run the following command::”h]”hŒÊThe userspace command â€˜tc,â€™ part of the iproute2 package, is used to configure
qdiscs.  To add the MULTIQ qdisc to your network device, assuming the device
is called eth0, run the following command:”…””}”(hj{  hžhhŸNh Nubah}”(h]”h ]”h"]”h$]”h&]”uh1hëhŸh³h K2hjj  hžhubhŒliteral_block”“”)”}”(hŒ-# tc qdisc add dev eth0 root handle 1: multiq”h]”hŒ-# tc qdisc add dev eth0 root handle 1: multiq”…””}”hj‹  sbah}”(h]”h ]”h"]”h$]”h&]”h±h²uh1j‰  hŸh³h K6hjj  hžhubhì)”}”(hŒÁThe qdisc will allocate the number of bands to equal the number of queues that
the device reports, and bring the qdisc online.  Assuming eth0 has 4 Tx
queues, the band mapping would look like::”h]”hŒÀThe qdisc will allocate the number of bands to equal the number of queues that
the device reports, and bring the qdisc online.  Assuming eth0 has 4 Tx
queues, the band mapping would look like:”…””}”(hj™  hžhhŸNh Nubah}”(h]”h ]”h"]”h$]”h&]”uh1hëhŸh³h K8hjj  hžhubjŠ  )”}”(hŒGband 0 => queue 0
band 1 => queue 1
band 2 => queue 2
band 3 => queue 3”h]”hŒGband 0 => queue 0
band 1 => queue 1
band 2 => queue 2
band 3 => queue 3”…””}”hj§  sbah}”(h]”h ]”h"]”h$]”h&]”h±h²uh1j‰  hŸh³h K<hjj  hžhubhì)”}”(hŒ”Traffic will begin flowing through each queue based on either the simple_tx_hash
function or based on netdev->select_queue() if you have it defined.”h]”hŒ”Traffic will begin flowing through each queue based on either the simple_tx_hash
function or based on netdev->select_queue() if you have it defined.”…””}”(hjµ  hžhhŸNh Nubah}”(h]”h ]”h"]”h$]”h&]”uh1hëhŸh³h KAhjj  hžhubhì)”}”(hX
  The behavior of tc filters remains the same.  However a new tc action,
skbedit, has been added.  Assuming you wanted to route all traffic to a
specific host, for example 192.168.0.3, through a specific queue you could use
this action and establish a filter such as::”h]”hX	  The behavior of tc filters remains the same.  However a new tc action,
skbedit, has been added.  Assuming you wanted to route all traffic to a
specific host, for example 192.168.0.3, through a specific queue you could use
this action and establish a filter such as:”…””}”(hjÃ  hžhhŸNh Nubah}”(h]”h ]”h"]”h$]”h&]”uh1hëhŸh³h KDhjj  hžhubjŠ  )”}”(hŒƒtc filter add dev eth0 parent 1: protocol ip prio 1 u32 \
        match ip dst 192.168.0.3 \
        action skbedit queue_mapping 3”h]”hŒƒtc filter add dev eth0 parent 1: protocol ip prio 1 u32 \
        match ip dst 192.168.0.3 \
        action skbedit queue_mapping 3”…””}”hjÑ  sbah}”(h]”h ]”h"]”h$]”h&]”h±h²uh1j‰  hŸh³h KIhjj  hžhubhŒ
field_list”“”)”}”(hhh]”(hŒfield”“”)”}”(hhh]”(hŒ
field_name”“”)”}”(hŒAuthor”h]”hŒAuthor”…””}”(hjë  hžhhŸNh Nubah}”(h]”h ]”h"]”h$]”h&]”uh1jé  hjæ  hŸh³h K ubhŒ
field_body”“”)”}”(hŒ-Alexander Duyck <alexander.h.duyck@intel.com>”h]”hì)”}”(hjý  h]”(hŒAlexander Duyck <”…””}”(hjÿ  hžhhŸNh NubhŒ	reference”“”)”}”(hŒalexander.h.duyck@intel.com”h]”hŒalexander.h.duyck@intel.com”…””}”(hj  hžhhŸNh Nubah}”(h]”h ]”h"]”h$]”h&]”Œrefuri”Œ"mailto:alexander.h.duyck@intel.com”uh1j  hjÿ  ubhŒ>”…””}”(hjÿ  hžhhŸNh Nubeh}”(h]”h ]”h"]”h$]”h&]”uh1hëhŸh³h KMhjû  ubah}”(h]”h ]”h"]”h$]”h&]”uh1jù  hjæ  ubeh}”(h]”h ]”h"]”h$]”h&]”uh1jä  hŸh³h KMhjá  hžhubjå  )”}”(hhh]”(jê  )”}”(hŒOriginal Author”h]”hŒOriginal Author”…””}”(hj1  hžhhŸNh Nubah}”(h]”h ]”h"]”h$]”h&]”uh1jé  hj.  hŸh³h K ubjú  )”}”(hŒ9Peter P. Waskiewicz Jr. <peter.p.waskiewicz.jr@intel.com>”h]”hì)”}”(hjA  h]”(hŒPeter P. Waskiewicz Jr. <”…””}”(hjC  hžhhŸNh Nubj  )”}”(hŒpeter.p.waskiewicz.jr@intel.com”h]”hŒpeter.p.waskiewicz.jr@intel.com”…””}”(hjJ  hžhhŸNh Nubah}”(h]”h ]”h"]”h$]”h&]”Œrefuri”Œ&mailto:peter.p.waskiewicz.jr@intel.com”uh1j  hjC  ubhŒ>”…””}”(hjC  hžhhŸNh Nubeh}”(h]”h ]”h"]”h$]”h&]”uh1hëhŸh³h KNhj?  ubah}”(h]”h ]”h"]”h$]”h&]”uh1jù  hj.  ubeh}”(h]”h ]”h"]”h$]”h&]”uh1jä  hŸh³h KNhjá  hžhubeh}”(h]”h ]”h"]”h$]”h&]”uh1jß  hjj  hžhhŸh³h KMubeh}”(h]”Œ9section-3-brief-howto-using-multiq-for-multiqueue-devices”ah ]”h"]”Œ:section 3: brief howto using multiq for multiqueue devices”ah$]”h&]”uh1h´hh¶hžhhŸh³h K0ubeh}”(h]”Œ+howto-for-multiqueue-network-device-support”ah ]”h"]”Œ+howto for multiqueue network device support”ah$]”h&]”uh1h´hhhžhhŸh³h Kubeh}”(h]”h ]”h"]”h$]”h&]”Œsource”h³uh1hŒcurrent_source”NŒcurrent_line”NŒsettings”Œdocutils.frontend”ŒValues”“”)”}”(h¹NŒ	generator”NŒ	datestamp”NŒsource_link”NŒ
source_url”NŒtoc_backlinks”Œentry”Œfootnote_backlinks”KŒsectnum_xform”KŒstrip_comments”NŒstrip_elements_with_classes”NŒstrip_classes”NŒreport_level”KŒ
halt_level”KŒexit_status_level”KŒdebug”NŒwarning_stream”NŒ	traceback”ˆŒinput_encoding”Œ	utf-8-sig”Œinput_encoding_error_handler”Œstrict”Œoutput_encoding”Œutf-8”Œoutput_encoding_error_handler”j©  Œerror_encoding”Œutf-8”Œerror_encoding_error_handler”Œbackslashreplace”Œlanguage_code”Œen”Œrecord_dependencies”NŒconfig”NŒ	id_prefix”hŒauto_id_prefix”Œid”Œdump_settings”NŒdump_internals”NŒdump_transforms”NŒdump_pseudo_xml”NŒexpose_internals”NŒstrict_visitor”NŒ_disable_config”NŒ_source”h³Œ_destination”NŒ_config_files”]”Œ7/var/lib/git/docbuild/linux/Documentation/docutils.conf”aŒfile_insertion_enabled”ˆŒraw_enabled”KŒline_length_limit”M'Œpep_references”NŒpep_base_url”Œhttps://peps.python.org/”Œpep_file_url_template”Œpep-%04d”Œrfc_references”NŒrfc_base_url”Œ&https://datatracker.ietf.org/doc/html/”Œ	tab_width”KŒtrim_footnote_reference_space”‰Œsyntax_highlight”Œlong”Œsmart_quotes”ˆŒsmartquotes_locales”]”Œcharacter_level_inline_markup”‰Œdoctitle_xform”‰Œdocinfo_xform”KŒsectsubtitle_xform”‰Œimage_loading”Œlink”Œembed_stylesheet”‰Œcloak_email_addresses”ˆŒsection_self_link”‰Œenv”NubŒreporter”NŒindirect_targets”]”Œsubstitution_defs”}”Œsubstitution_names”}”Œrefnames”}”Œrefids”}”Œnameids”}”(jƒ  j€  j$  j!  j  j  jg  jd  j{  jx  uŒ	nametypes”}”(jƒ  ‰j$  ‰j  ‰jg  ‰j{  ‰uh}”(j€  h¶j!  hÉj  hÚjd  j'  jx  jj  uŒfootnote_refs”}”Œcitation_refs”}”Œautofootnotes”]”Œautofootnote_refs”]”Œsymbol_footnotes”]”Œsymbol_footnote_refs”]”Œ	footnotes”]”Œ	citations”]”Œautofootnote_start”KŒsymbol_footnote_start”K Œ
id_counter”Œcollections”ŒCounter”“”}”…”R”Œparse_messages”]”Œtransform_messages”]”Œtransformer”NŒinclude_log”]”Œ
decoration”Nhžhub.