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intel / intel-cmt-cat

User space software for Intel(R) Resource Director Technology
http://www.intel.com/content/www/us/en/architecture-and-technology/resource-director-technology.html
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Can the MBM feature moniter memory bandwidth caused by DMA? #186

Closed Jiangrijin closed 3 years ago

Jiangrijin commented 3 years ago

I want to moniter VM's memory bandwidth, so I wonder if the output of MBM(Memory Bandwidth Monitering) includes DMA's bandwidth like network bandwidth.

mdcornu commented 3 years ago

MBM only counts bandwidth generated by processor cores, so the MBM output will not include DMA bandwidth.

Jiangrijin commented 3 years ago

Thanks a lot! I also want to know if the output covers both read and write memory bandwidth.

mdcornu commented 3 years ago

Yes, reads and writes are counted by MBM.