唯一の欠点は、FDPの追加メリットであったWAFが利用できなくなるということです。 FDPはオプション機能であるため、FDPが活性化されたSSDはIOコマンドで活性化された場合にのみ、ホストに提供されたヒントを処理します(DTYPEおよびDSPECフィールドが使用されます)。 4.1 いつFDP...
FDP allows the host to track the writes in an RU. Using FDP spec, host can get to know the remaining bytes in an RU and it can even instruct the SSD to pick up a new RU for a given RUH when needed. While host architects might rejoice at such a provision, this needs t...
You may wish to add a new command or possibly an entirely new plug-in for some special extension outside the spec. This project provides macros that help generate the code for you. If you're interested in how that works, it is very similar to how trace events are created by Linux kern...
void nvme_directive_show(__u8 type, __u8 oper, __u16 spec, __u32 nsid, __u32 result, void *buf, __u32 len, enum nvme_print_flags flags); void *buf, __u32 len, nvme_print_flags_t flags); void nvme_show_select_result(enum nvme_features_id fid, __u32 result); void nvm...
nvme_print(directive, flags, type, oper, spec, nsid, result, buf, len); } const char *nvme_plm_window_to_string(__u32 plm) { switch (plm & 0x7) { case 1: return "Deterministic Window (DTWIN)"; case 2: return "Non-deterministic Window (NDWIN)"; ...
case XNVME_SPEC_NVM_NS_16B_GUARD: if (o->prchk & XNVME_PI_FLAGS_REFTAG_CHECK) ctx->cmd.nvm.ilbrt = (uint32_t)slba; break; case XNVME_SPEC_NVM_NS_64B_GUARD: if (o->prchk & XNVME_PI_FLAGS_REFTAG_CHECK) { ctx->cmd.nvm.ilbrt = (uint32_t)slba; ...
看上去更像是NVM sets和Multi-Stream功能的技术融合,具体实现细节可能要等最终确定进入NVME Spec在说。有可能在NVME Spec 2.x就可以看到了。 如果这个FDP实现,是不是就完成了写放大优化策略的大统一呢?也不好说,让我们拭目以待。 除了以上优化写放大的方式,你还有其他的想法吗?欢迎评论留言交流～...
FDP allows the host to track the writes in an RU. Using FDP spec, host can get to know the remaining bytes in an RU and it can even instruct the SSD to pick up a new RU for a given RUH when needed. While host architects might rejoice at such a provision, this needs to b...
FDP allows the host to track the writes in an RU. Using FDP spec, host can get to know the remaining bytes in an RU and it can even instruct the SSD to pick up a new RU for a given RUH when needed. While host architects might rejoice at such a provision, this needs to...
nvme_print(directive, flags, type, oper, spec, nsid, result, buf, len); } const char *nvme_plm_window_to_string(__u32 plm) { switch (plm & 0x7) { case 1: return "Deterministic Window (DTWIN)"; case 2: return "Non-deterministic Window (NDWIN)"; ...