€•ù/Œsphinx.addnodes”Œdocument”“”)”}”(Œ rawsource”Œ”Œchildren”]”(Œ translations”Œ LanguagesNode”“”)”}”(hhh]”(hŒ pending_xref”“”)”}”(hhh]”Œdocutils.nodes”ŒText”“”ŒChinese (Simplified)”…””}”Œparent”hsbaŒ attributes”}”(Œids”]”Œclasses”]”Œnames”]”Œdupnames”]”Œbackrefs”]”Œ refdomain”Œstd”Œreftype”Œdoc”Œ reftarget”Œ,/translations/zh_CN/admin-guide/perf/arm-cmn”Œmodname”NŒ classname”NŒ refexplicit”ˆuŒtagname”hhh ubh)”}”(hhh]”hŒChinese (Traditional)”…””}”hh2sbah}”(h]”h ]”h"]”h$]”h&]”Œ refdomain”h)Œreftype”h+Œ reftarget”Œ,/translations/zh_TW/admin-guide/perf/arm-cmn”Œmodname”NŒ classname”NŒ refexplicit”ˆuh1hhh ubh)”}”(hhh]”hŒItalian”…””}”hhFsbah}”(h]”h ]”h"]”h$]”h&]”Œ refdomain”h)Œreftype”h+Œ reftarget”Œ,/translations/it_IT/admin-guide/perf/arm-cmn”Œmodname”NŒ classname”NŒ refexplicit”ˆuh1hhh ubh)”}”(hhh]”hŒJapanese”…””}”hhZsbah}”(h]”h ]”h"]”h$]”h&]”Œ refdomain”h)Œreftype”h+Œ reftarget”Œ,/translations/ja_JP/admin-guide/perf/arm-cmn”Œmodname”NŒ classname”NŒ refexplicit”ˆuh1hhh ubh)”}”(hhh]”hŒKorean”…””}”hhnsbah}”(h]”h ]”h"]”h$]”h&]”Œ refdomain”h)Œreftype”h+Œ reftarget”Œ,/translations/ko_KR/admin-guide/perf/arm-cmn”Œmodname”NŒ classname”NŒ refexplicit”ˆuh1hhh ubh)”}”(hhh]”hŒPortuguese (Brazilian)”…””}”hh‚sbah}”(h]”h ]”h"]”h$]”h&]”Œ refdomain”h)Œreftype”h+Œ reftarget”Œ,/translations/pt_BR/admin-guide/perf/arm-cmn”Œmodname”NŒ classname”NŒ refexplicit”ˆuh1hhh ubh)”}”(hhh]”hŒSpanish”…””}”hh–sbah}”(h]”h ]”h"]”h$]”h&]”Œ refdomain”h)Œreftype”h+Œ reftarget”Œ,/translations/sp_SP/admin-guide/perf/arm-cmn”Œmodname”NŒ classname”NŒ refexplicit”ˆuh1hhh ubeh}”(h]”h ]”h"]”h$]”h&]”Œcurrent_language”ŒEnglish”uh1h hhŒ _document”hŒsource”NŒline”NubhŒsection”“”)”}”(hhh]”(hŒtitle”“”)”}”(hŒArm Coherent Mesh Network PMU”h]”hŒArm Coherent Mesh Network PMU”…””}”(hh¼h²hh³Nh´Nubah}”(h]”h ]”h"]”h$]”h&]”uh1hºhh·h²hh³ŒF/var/lib/git/docbuild/linux/Documentation/admin-guide/perf/arm-cmn.rst”h´KubhŒ paragraph”“”)”}”(hŒÈCMN-600 is a configurable mesh interconnect consisting of a rectangular grid of crosspoints (XPs), with each crosspoint supporting up to two device ports to which various AMBA CHI agents are attached.”h]”hŒÈCMN-600 is a configurable mesh interconnect consisting of a rectangular grid of crosspoints (XPs), with each crosspoint supporting up to two device ports to which various AMBA CHI agents are attached.”…””}”(hhÍh²hh³Nh´Nubah}”(h]”h ]”h"]”h$]”h&]”uh1hËh³hÊh´Khh·h²hubhÌ)”}”(hX¨CMN implements a distributed PMU design as part of its debug and trace functionality. This consists of a local monitor (DTM) at every XP, which counts up to 4 event signals from the connected device nodes and/or the XP itself. Overflow from these local counters is accumulated in up to 8 global counters implemented by the main controller (DTC), which provides overall PMU control and interrupts for global counter overflow.”h]”hX¨CMN implements a distributed PMU design as part of its debug and trace functionality. This consists of a local monitor (DTM) at every XP, which counts up to 4 event signals from the connected device nodes and/or the XP itself. Overflow from these local counters is accumulated in up to 8 global counters implemented by the main controller (DTC), which provides overall PMU control and interrupts for global counter overflow.”…””}”(hhÛh²hh³Nh´Nubah}”(h]”h ]”h"]”h$]”h&]”uh1hËh³hÊh´K hh·h²hubh¶)”}”(hhh]”(h»)”}”(hŒ PMU events”h]”hŒ PMU events”…””}”(hhìh²hh³Nh´Nubah}”(h]”h ]”h"]”h$]”h&]”uh1hºhhéh²hh³hÊh´KubhÌ)”}”(hXJThe PMU driver registers a single PMU device for the whole interconnect, see /sys/bus/event_source/devices/arm_cmn_0. Multi-chip systems may link more than one CMN together via external CCIX links - in this situation, each mesh counts its own events entirely independently, and additional PMU devices will be named arm_cmn_{1..n}.”h]”hXJThe PMU driver registers a single PMU device for the whole interconnect, see /sys/bus/event_source/devices/arm_cmn_0. Multi-chip systems may link more than one CMN together via external CCIX links - in this situation, each mesh counts its own events entirely independently, and additional PMU devices will be named arm_cmn_{1..n}.”…””}”(hhúh²hh³Nh´Nubah}”(h]”h ]”h"]”h$]”h&]”uh1hËh³hÊh´Khhéh²hubhÌ)”}”(hŒçMost events are specified in a format based directly on the TRM definitions - "type" selects the respective node type, and "eventid" the event number. Some events require an additional occupancy ID, which is specified by "occupid".”h]”hŒóMost events are specified in a format based directly on the TRM definitions - “type†selects the respective node type, and “eventid†the event number. Some events require an additional occupancy ID, which is specified by “occupidâ€.”…””}”(hjh²hh³Nh´Nubah}”(h]”h ]”h"]”h$]”h&]”uh1hËh³hÊh´Khhéh²hubhŒ bullet_list”“”)”}”(hhh]”(hŒ list_item”“”)”}”(hŒžSince RN-D nodes do not have any distinct events from RN-I nodes, they are treated as the same type (0xa), and the common event templates are named "rnid_*". ”h]”hÌ)”}”(hŒSince RN-D nodes do not have any distinct events from RN-I nodes, they are treated as the same type (0xa), and the common event templates are named "rnid_*".”h]”hŒ¡Since RN-D nodes do not have any distinct events from RN-I nodes, they are treated as the same type (0xa), and the common event templates are named “rnid_*â€.”…””}”(hj!h²hh³Nh´Nubah}”(h]”h ]”h"]”h$]”h&]”uh1hËh³hÊh´Khjubah}”(h]”h ]”h"]”h$]”h&]”uh1jhjh²hh³hÊh´Nubj)”}”(hŒsThe cycle counter is treated as a synthetic event belonging to the DTC node ("type" == 0x3, "eventid" is ignored). ”h]”hÌ)”}”(hŒrThe cycle counter is treated as a synthetic event belonging to the DTC node ("type" == 0x3, "eventid" is ignored).”h]”hŒzThe cycle counter is treated as a synthetic event belonging to the DTC node (“type†== 0x3, “eventid†is ignored).”…””}”(hj9h²hh³Nh´Nubah}”(h]”h ]”h"]”h$]”h&]”uh1hËh³hÊh´K"hj5ubah}”(h]”h ]”h"]”h$]”h&]”uh1jhjh²hh³hÊh´Nubj)”}”(hŒÙXP events also encode the port and channel in the "eventid" field, to match the underlying pmu_event0_id encoding for the pmu_event_sel register. The event templates are named with prefixes to cover all permutations. ”h]”hÌ)”}”(hŒØXP events also encode the port and channel in the "eventid" field, to match the underlying pmu_event0_id encoding for the pmu_event_sel register. The event templates are named with prefixes to cover all permutations.”h]”hŒÜXP events also encode the port and channel in the “eventid†field, to match the underlying pmu_event0_id encoding for the pmu_event_sel register. The event templates are named with prefixes to cover all permutations.”…””}”(hjQh²hh³Nh´Nubah}”(h]”h ]”h"]”h$]”h&]”uh1hËh³hÊh´K%hjMubah}”(h]”h ]”h"]”h$]”h&]”uh1jhjh²hh³hÊh´Nubeh}”(h]”h ]”h"]”h$]”h&]”Œbullet”Œ*”uh1jh³hÊh´Khhéh²hubhÌ)”}”(hX By default each event provides an aggregate count over all nodes of the given type. To target a specific node, "bynodeid" must be set to 1 and "nodeid" to the appropriate value derived from the CMN configuration (as defined in the "Node ID Mapping" section of the TRM).”h]”hXBy default each event provides an aggregate count over all nodes of the given type. To target a specific node, “bynodeid†must be set to 1 and “nodeid†to the appropriate value derived from the CMN configuration (as defined in the “Node ID Mapping†section of the TRM).”…””}”(hjmh²hh³Nh´Nubah}”(h]”h ]”h"]”h$]”h&]”uh1hËh³hÊh´K*hhéh²hubeh}”(h]”Œ pmu-events”ah ]”h"]”Œ pmu events”ah$]”h&]”uh1hµhh·h²hh³hÊh´Kubh¶)”}”(hhh]”(h»)”}”(hŒ Watchpoints”h]”hŒ Watchpoints”…””}”(hj†h²hh³Nh´Nubah}”(h]”h ]”h"]”h$]”h&]”uh1hºhjƒh²hh³hÊh´K0ubhÌ)”}”(hXjThe PMU can also count watchpoint events to monitor specific flit traffic. Watchpoints are treated as a synthetic event type, and like PMU events can be global or targeted with a particular XP's "nodeid" value. Since the watchpoint direction is otherwise implicit in the underlying register selection, separate events are provided for flit uploads and downloads.”h]”hXpThe PMU can also count watchpoint events to monitor specific flit traffic. Watchpoints are treated as a synthetic event type, and like PMU events can be global or targeted with a particular XP’s “nodeid†value. Since the watchpoint direction is otherwise implicit in the underlying register selection, separate events are provided for flit uploads and downloads.”…””}”(hj”h²hh³Nh´Nubah}”(h]”h ]”h"]”h$]”h&]”uh1hËh³hÊh´K2hjƒh²hubhÌ)”}”(hXIThe flit match value and mask are passed in config1 and config2 ("val" and "mask" respectively). "wp_dev_sel", "wp_chn_sel", "wp_grp" and "wp_exclusive" are specified per the TRM definitions for dtm_wp_config0. Where a watchpoint needs to match fields from both match groups on the REQ or SNP channel, it can be specified as two events - one for each group - with the same nonzero "combine" value. The count for such a pair of combined events will be attributed to the primary match. Watchpoint events with a "combine" value of 0 are considered independent and will count individually.”h]”hXiThe flit match value and mask are passed in config1 and config2 (“val†and “mask†respectively). “wp_dev_selâ€, “wp_chn_selâ€, “wp_grp†and “wp_exclusive†are specified per the TRM definitions for dtm_wp_config0. Where a watchpoint needs to match fields from both match groups on the REQ or SNP channel, it can be specified as two events - one for each group - with the same nonzero “combine†value. The count for such a pair of combined events will be attributed to the primary match. 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