Since some applications could not effectively utilize more than one NUMA node, I'm testing the situation when NUMA was disabled with a 2S cascade-lake-sp system(48 cores, 12channels total).
The memory latency impact was expected, but the bandwidth was also severely lowered to about 73GB/s, that is 1/3 of the same system with NUMA enabled, or almost half that of a 1S 6-channel system.
Why disabling NUMA has such huge effect on memory bandwidth, even more than on latency? Are there anything I can do to improve on this?
Thanks.
Link Copied
