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28 .Nm pmc.cmn-600
29 .Nd Library for accessing the Arm CoreLink CMN-600 Coherent Mesh Network
36 CMN-600 PMU counters may be configured to count any one of a defined set of
38 Unlike other performance counters, counters for the CMN-600 require the
52 Some BIOS versions of dual-socket machines have no NUMA domain information in
57 the CPU package containing that CMN-600 controller.
64 Arm CoreLink CMN-600 Coherent Mesh Network Controller performance counters are
67 .%B "Arm CoreLink CMN-600 Coherent Mesh Network Technical Reference Manual"
73 CMN-600 PMU counters support the following capabilities:
74 .Bl -column "PMC_CAP_INTERRUPT" "Support"
91 .Bl -tag -width indent
111 .Bl -tag -width indent
114 This includes all the sub-types include TLB invalidate, Branch predictor
144 .Ss HN-F node events
145 .Bl -tag -width indent
161 Counts number of directed snoops sent (not including SF back invalidation)
163 Counts number of multicast snoops sent (not including SF back invalidation)
173 Counts number of times a HighHigh priority request is protocol-retried at the
174 HN-F
176 Counts the POCQ occupancy in HN-F.
177 Support argument "occupancy". Accept: All, Read, Write, Atomic, Stash.
190 Counts number of times HN-F has a pending TXDAT flit but no credits to upload
192 Counts number of times HN-F has a pending TXRSP flit but no credits to upload
198 Counts number of snoops sent including directed, multicast, and SF back
201 Counts number of times directed snoops were sent due to SF back invalidation
203 Counts number of times multicast snoops were sent due to SF back invalidation
207 Counts number of times SF back invalidation resulted in dirty line intervention
216 .Ss HN-I node events
217 .Bl -tag -width indent
221 RRT write occupancy count overflow
225 RDT write occupancy count overflow
231 RRT write allocation
235 RDT write allocation
253 Non-PCIe serialization event
258 .Bl -tag -width indent
270 RN-F_CHIA port.
279 .Bl -tag -width indent
283 Write request
295 Write request tracker occupancy count overflow
315 .Ss RN-D node events
316 .Bl -tag -width indent
331 This is a measure of the write bandwidth.
343 All entries in the write request tracker are occupied.
344 This is a measure of oversubscription in the write request tracker.
349 Number of write data cancels sent.
350 This is the measure of write cancel rate.
353 This is a measure of write bandwidth on AXI port 0.
356 This is a measure of write bandwidth on AXI port 1.
359 This is a measure of write bandwidth on AXI port 2.
364 Number of allocations in the write request tracker.
365 This is a measure of write transaction count.
376 .Ss RN-I node events
377 .Bl -tag -width indent
392 This is a measure of the write bandwidth.
403 All entries in the write request tracker are occupied.
404 This is a measure of oversubscription in the write request tracker.
409 Number of write data cancels sent.
410 This is the measure of write cancel rate
413 This is a measure of write bandwidth on AXI port 0.
416 This is a measure of write bandwidth on AXI port 1.
419 This is a measure of write bandwidth on AXI port 2.
424 Number of allocations in the write request tracker.
425 This is a measure of write transaction count
438 .Bl -tag -width indent
458 Write Data Buffer Occupancy
467 .Bl -tag -width indent
475 Write data buffer occupancy
506 .Bl -tag -width indent
577 .Nm pmc.cmn-600
581 .An -nosplit
588 The CMN-600 PMU driver was sponsored by ARM Ltd.