Viewing profile — electricshampo1

Depending on the IOPS rate for your app; SPDK can result in less CPU time spent in issuing IO/reaping completions compared to ex. io_uring. See Ex. https://www.vldb.org/pvldb/vol16…

From the pdf of the bill, software is still classified as R&D on page 303 of this bill; the change is that domestic (US) software R&D is no longer forced into a 5yr amortization sc…

Nice to see SDC concerns being taken more seriously by hardware folks. Once software gets to sufficient quality (which we have achieved in many cases), these kinds of rando hw issu…

The gap between the efficiency displayed here and that which can be found in ex. postgres/mysql is insane.

It is integer factors better overall total BW than ddr5 spr; I think they went for minimal investment + time to market for the spr w/ hbm product rather than heavy investment to hi…

Completely agree re: firedancer codebase. There is a level of thought and discipline wrt performance that I have never seen anywhere else.

On prod servers I see a bunch of frontend stalls & code misses in the L2 for the kernel tcp stack; having each process statically embed its own network stack may make that worse (t…

Thanks for this link; did not realize that they did this.

Answering only the latter question: A Primer on Memory Consistency and Cache Coherence, Second Edition https://www.morganclaypool.com/doi/10.2200/S00962ED2V01Y2019... (free online …

" Like many modern analytical engines [18, 20], Procella does not use the conventional BTree style secondary indexes, opting instead for light weight secondary structures such as z…

The whole chip in general will be used in aggregate by independent vms/containers etc that do NOT read and write to the same memory. Some kernel datastructures within a given vm ar…

It might be helpful to read something like DB2 with BLU Acceleration: So Much More than Just a Column Store https://db.cs.pitt.edu/courses/cs3551/16-1/handouts/db2BLU.p... or Real-…

Unlike goroutines, seems here you have control over the execution schedule for the virtual threads if you provide an executor. This is pretty great. Think this will obsolete go ove…

This is only on the client side; server still has and will have AVX512 for the foreseeable future.

"However, we were talking about array indexes, for loops, and file offsets for a single file. These are 8 byte variables within a running program." This depends on storage/page lay…

Is Swift ( https://dl.acm.org/doi/pdf/10.1145/3387514.3406591 ) expected/designed to be used in non-intra dc environments where primarily quic is expected to have an advantage rela…

Generally for perf critical use cases you dedicate the machine to the database. This simplifies many things (avoiding having to reason about sharing, etc etc).

Seems like facebook's internal db TAO supports it according to https://www.vldb.org/pvldb/vol14/p3014-cheng.pdf

Seems 400M is aggregated qps worldwide. Wonder what avg qps looks like per iam server (and size of server).

This is just best effort on google's end right? Don't think anything is documented/guaranteed such that you would be able to, for ex. rely on it like spanner's use of true time.