Iphrosesa evulekile ye-RISC-V, i-XiangShan, idalwe e-China, encintisana ne-ARM Cortex-A76.

I-Institute of Computer Technology ye-Chinese Academy of Sciences yethule iphrojekthi ye-XiangShan, okuthe kusukela ngo-2020 ibithuthukisa iphrosesa evulekile esebenza kahle esekelwe ku-RISC-V instruction set architecture (RV64GC). Intuthuko yephrojekthi ivuliwe ngaphansi kwelayisensi ye-permissive MulanPSL 2.0.

Le phrojekthi ishicilele incazelo yamabhulokhi ezingxenyekazi zekhompuyutha ngolimi lweChisel, oluhunyushwa ku-Verilog, ukuqaliswa kwereferensi okusekelwe ku-FPGA, kanye nemifanekiso yokulingisa ukusebenza kwe-chip kusifanisi se-Verilog simulator esivulekile. Imidwebo nezincazelo zezakhiwo nazo ziyatholakala (inani selilonke imibhalo engaphezu kuka-400 nemigqa yekhodi eyizinkulungwane ezingama-50), kodwa inqwaba yemibhalo ingesiShayina. I-Debian GNU/Linux isetshenziswa njengenkomba yokusebenza yesistimu esetshenziselwa ukuhlola ukuqaliswa okusekelwe ku-FPGA.

I-XiangShan ithi iyi-chip ye-RISC-V esebenza kakhulu, idlula i-SiFive P550. Kule nyanga kuhlelwe ukuthi kuphothulwe ukuhlola ku-FPGA bese kudedelwa i-chip ye-prototype engu-8-core esebenza ku-1.3 GHz futhi yakhiwe yi-TSMC isebenzisa ubuchwepheshe benqubo ye-28nm, ebizwa ngokuthi “i-Yanqi Lake”. I-chip ihlanganisa inqolobane engu-2MB, isilawuli sememori esisekela inkumbulo ye-DDR4 (kufika ku-32GB we-RAM) kanye nesixhumi esibonakalayo se-PCIe-3.0-x4.

Ukusebenza kwe-chip yokuqala ekuhlolweni kwe-SPEC2006 kulinganiselwa ku-7/Ghz, okuhambisana nama-ARM Cortex-A72 nama-Cortex-A73 chips. Ekupheleni konyaka, kuhlelwe ukukhiqizwa kwe-prototype yesibili "yeLake Lake" enesakhiwo esithuthukisiwe, esizodluliselwa ku-SMIC ngobuchwepheshe benqubo ye-14nm kanye nokwanda kwemvamisa ku-2 GHz. I-prototype yesibili kulindeleke ukuthi yenze ngo-2006/Ghz ekuhlolweni kwe-SPEC10, okuseduze ne-ARM Cortex-A76 kanye ne-Intel Core i9-10900K processors, futhi iphakeme kune-SiFive P550, i-RISC-V CPU eshesha kakhulu, ene- ukusebenza kwe-8.65/Ghz.

Khumbula ukuthi i-RISC-V ihlinzeka ngohlelo lokufundisa ngomshini oluvulekile noluguquguqukayo oluvumela ama-microprocessors ukuthi akhelwe izinhlelo zokusebenza ngokungafanele ngaphandle kokudinga izinkokhelo noma ukubeka izimo zokusebenzisa. I-RISC-V ikuvumela ukuthi udale ama-SoC namaphrosesa avuleke ngokuphelele. Njengamanje, ngokususelwa ekucacisweni kwe-RISC-V, ishumi nambili ukwahluka kwama-microprocessor cores, ama-SoCs nama-chips asevele akhiqiziwe athuthukiswa izinkampani nemiphakathi ehlukene ngaphansi kwamalayisensi ahlukahlukene amahhala (BSD, MIT, Apache 2.0). Amasistimu okusebenza anokusekelwa kwekhwalithi ephezulu kwe-RISC-V afaka i-Linux (ekhona kusukela ekukhishweni kwe-Glibc 2.27, binutils 2.30, gcc 7 kanye ne-Linux kernel 4.15) kanye ne-FreeBSD.

Source: opennet.ru