Software Tuning, Performance Optimization & Platform Monitoring
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Intel MBM per NUMA node bandwidth usage info

Reza1
Beginner
‎02-23-2019 09:30 PM
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Does Memory Bandwidth Monitoring technology collect "per numa node" bandwidth usage info or it's just local and all the remote nodes?

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HadiBrais
New Contributor III
‎02-28-2019 12:03 PM
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I don't think you can measure bandwidth per NUMA node using MBM because there is only one Event ID (0x02) for the total external bandwidth and Event ID (0x3) for the local memory bandwidth. However, there is one PMON box per QPI/UPI link. You can use the data flit events to measure data QPI bandwidth between any two specific sockets as follows:

Incoming data bandwidth = (RxL_FLITS_G1.DRS_DATA + RxL_FLITS_G2.NCB_DATA) * 8 / time

Outgoing data bandwidth = TxL_FLITS_G0.DATA * 8 / time

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