Messages in this thread | | | Date | Fri, 22 Apr 2022 17:08:34 -0400 | Subject | Re: [PATCH v5 2/5] perf: Add SNOOP_PEER flag to perf mem data struct | From | "Liang, Kan" <> |
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On 4/22/2022 2:49 PM, Ali Saidi wrote: > On Wed, 20 Apr 2022 18:43:28, Kan Liang wrote: >> On 4/8/2022 3:53 PM, Ali Saidi wrote: >>> Add a flag to the perf mem data struct to signal that a request caused a >>> cache-to-cache transfer of a line from a peer of the requestor and >>> wasn't sourced from a lower cache level. >> >> It sounds similar to the Forward state. Why can't the >> PERF_MEM_SNOOPX_FWD be reused? > > Is there a definition of SNOOPX_FWD i can refer to? Happy to use this instead if > the semantics align between architectures. >
+ Andi
As my understanding, the SNOOPX_FWD means the Forward state, which is a non-modified (clean) cache-to-cache copy. https://en.wikipedia.org/wiki/MESIF_protocol
Thanks, Kan
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