Software Tuning, Performance Optimization & Platform Monitoring
Discussion around monitoring and software tuning methodologies, Performance Monitoring Unit (PMU) of Intel microprocessors, and platform monitoring

Intel MBM per NUMA node bandwidth usage info

Reza1
Beginner
303 Views

Does Memory Bandwidth Monitoring technology collect "per numa node" bandwidth usage info or it's just local and all the remote nodes?

0 Kudos
1 Reply
HadiBrais
New Contributor III
303 Views

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

Reply