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AMD Preparing Linux For Smart Data Cache Injection With "Upcoming" CPUs
AMD Linux engineers are preparing the kernel for Smart Data Cache Injection (SDCI) as a feature for AMD EPYC server processors
Sent out today was a new patch series in preparing the Linux kernel's resource control "resctrl" functionality for L3 Smart Data Cache Injection Allocation Enforcement (SDCIAE). SDCI has appeared in AMD programmer documentation since last year while the Linux kernel patches are only surfacing now and building off the recent PCIe TPH work. AMD SDCI is able to let DMA data be pre-fetched into the cache of target CCXs rather than going first into DRAM, in order to help lower latency, increase performance, and conserve memory bandwidth.
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