![]() 2 × 64-bit channels, up to 2 DIMMs, max.DRAM bus parity and write data CRC options.SR/ DR RDIMM, 4R/ 8R LRDIMM, 3DS DIMM, NVDIMM-N.8 channels per socket, up to 16 DIMMs, max.4-Kbyte and 2-Mbyte pages, PDEs to speed up table walksĪll caches and TLBs are competitively shared in multi-threaded mode.2,048 entry L2 TLB, 16-way set associative.512 entry L2 TLB, 8-way set associative.64 entry L1 TLB, fully associative, all page sizes.DEC-TED ECC, tag array & shadow tags SEC-DED.Shared by all cores in the CCX, configurable." Cezanne": 16 MiB, 8 MiB usable on some SKUs." Vermeer": 32 MiB/CCX, up to 64 MiB total." Milan" & " Chagall": 32 MiB/CCX, up to 256 MiB total.DEC-TED ECC, tag & state arrays SEC-DED.512 KiB per core, 8-way set associative.4,096 Ops per core, 8-way set associative.Sources: Memory Hierarchy Data and Instruction Caches PSFD - Predictive Store Forwarding Disable (Speculation Control MSR). ![]() PSMASH, PVALIDATE, RMPADJUST, RMPUPDATE.SEV-SNP - 3rd generation Secure Encrypted Virtualization - Secure Nested Paging.CLRSSBSY, INCSSP, RDSSP, RSTORSSP, SAVEPREVSSP, SETSSBSY, WRSS, WRUSS.CET_SS - Control-flow Enforcement Technology / Shadow Stack.TLBSYNC - Synchronize TLB invalidations.INVLPGB - Invalidate TLB entry(s) with broadcast to all processors.INVPCID - Invalidate TLB entry(s) in a specified PCID.VPCLMULQDQ - 256-bit Vector Carry-Less Multiplication of Quadwords.VAESENCLAST - AES Last Encryption Round.VAESDECLAST - AES Last Decryption Round.Zen 3 introduced the following ISA enhancements: This list is incomplete you can help by expanding it. Page table walkers tripled from 2 to 6 for TLB miss handling.Store queue increase from 48 to 64 slots.Store throughput increased from 1 to 2, if not 256b.Load throughput increased from 2 to 3, if not 256b.(Unsigned operations are ~1 cycle faster for some of both old/new cases.) Throughput improves proportionately. ![]()
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