NUMA affect of Optane DIMM

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Mar 28, 2021, 10:43:41 PM3/28/21

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Hi, all.

I am reading a SIGMOD'21 paper named "Maximizing Persistent Memory Bandwidth

Figure 15(a) in the paper shows that cross-NUMA write is very slow:

1) The peak throughput is low

2) Bandwidth collapses when there are concurrent threads.

Anyone know the root causes of 1) and 2) ?

For 1), the authors say it results from the read-modify-write behavior.

Thanks

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Mar 28, 2021, 10:47:14 PM3/28/21

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Sorry, it is Figure 10

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Mar 29, 2021, 8:16:12 AM3/29/21

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Chapter 12 of this manual should help shed some light on the behavior that this paper highlights.

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