Hi John, > On the other hand, looking at Linux kernel sources, it seems a patch using > this > technique was contributed by Intel over a decade ago: > > https://github.com/torvalds/linux/blob/master/arch/x86/crypto/crc32c-pcl-intel- > asm_64.S > > So one more thing to ask our friends at Intel.
Intel has contributed SSE4.2 CRC32C [1] and AVX-512 CRC32C [2] based on similar techniques to postgres. [1] https://www.postgresql.org/message-id/ph8pr11mb8286f844321ba1deec518348fb...@ph8pr11mb8286.namprd11.prod.outlook.com [2] https://www.postgresql.org/message-id/bl1pr11mb530401fa7e9b1ca432cf9dc3dc...@bl1pr11mb5304.namprd11.prod.outlook.com Raghuveer
