On 2021/11/23 3:34, Yang Shi wrote:
On Mon, Nov 22, 2021 at 2:22 AM Baolin Wang
<baolin.wang@xxxxxxxxxxxxxxxxx> wrote:
Some workloads access a set of data entities will follow the data locality,
also known as locality of reference, which means the probability of accessing
some data soon after some nearby data has been accessed.
On some systems with different memory types, which will rely on the numa
balancing to promote slow hot memory to fast memory to improve performance.
So we can promote several sequential pages on slow memory at one time
according to the data locality for some workloads to improve the performance.
Fault around for NUMA fault definitely could reduce the overhead for
NUMA balancing by having fewer faults. I think this could be extended
to regular NUMA balancing too. But I'm not sure whether false
positives are worth concerning or not.
OK. Like Huang Ying said, maybe we can add some algorithm to adjust the
window of proactive numa faults dynamically. Thanks for your input.
I recall Mel proposed fault around too (not in patch, but shared some
ideas). Added Mel in this thread.
