<i>Yet I also feel the things C910 does well are overshadowed by executing poorly on the basics. The core’s out-of-order engine is poorly balanced, with inadequate capacity in critical structures like the schedulers and register files in relation to its ROB capacity. CPU performance is often limited by memory access performance, and C910’s cache subsystem is exceptionally weak. The cluster’s shared L2 is both slow and small, and the C910 cores have no mid-level cache to insulate L1 misses from that L2. DRAM bandwidth is also lackluster.</i><p>I'm not a CPU designer but shouldn't this be points that one could discover using higher-level simulators? Ie before even needing to do FPGA or gate-level sims?<p>If so, are they doing a SpaceX thing where they iterate fast with known less-than-optimal solutions just to gain experience building the things?
There are some comparative benchmarks on a slightly older post: <a href="https://chipsandcheese.com/p/a-risc-v-progress-check-benchmarking" rel="nofollow">https://chipsandcheese.com/p/a-risc-v-progress-check-benchma...</a>
Apache-2 open source: <a href="https://github.com/XUANTIE-RV/openc910">https://github.com/XUANTIE-RV/openc910</a>
Has it been demonstrated that RISC-V is architecturally suitable for making chips that equal the performance of high-end x86 and ARM designs?<p>I remember this post,by an ARM engineer, who was highly critical of the RISC-V ISA:<p><a href="https://news.ycombinator.com/item?id=24958423">https://news.ycombinator.com/item?id=24958423</a>
Apart from the lip service that has obvious reasons to support that latest chip technology is crucial to the national security, I fail to understand why this is the case.<p>What is the disadvantage that a country has if they only have access to computer technology from the 2010s? They will still make the same airplanes, drones, radars tanks and whatever.<p>It seems to me that it is nice to have SOTA manufacturing capability for semi-conductors but not necessary.
Does anyone know why 910 is used for both this and Huawei's 910 AI chip? Does 910 have some special meaning in Chinese, or is it just a coincidence?
This site is so good (for now...).<p>That said, isn't the C910 with a critical buggy vector block?<p>It is amazing acheivement in a saturated market. The road for reaching a fully mature and performant large RISC-V implementation is still long (to catch up with the other ones)...<p>... but a royalty free ISA is priceless, seriously.
I think „scary” is the best word. If of course rumor about choosing RISC-V over ARM is true!
We just saw big win of ARM over Intel's multi-decade scam and yet here we are with another split from ARM, because of politics. Scary to see how stupid, talking people, convincing other people to hate without real reasons can lead to such stories…