Sorry, I really don't know since I haven't tried it yet. There's a lot of potential to eliminate copies and syscalls here, but how much impact that really makes would of course depend on what else your system is doing.
(Note that I go by "Kenton", not "Ken"...) -Kenton On Fri, Feb 5, 2021 at 4:39 PM Taylor Dawson <fob...@gmail.com> wrote: > @Ken how much latency can you shave off with shared memory vs unix > sockets? Cc @Justin if you have any comparisons? > > Thanks! > > On Wednesday, January 23, 2019 at 1:19:13 PM UTC-8 ken...@cloudflare.com > wrote: > >> I think the way I'd do shared memory Cap'n Proto would be to have a large >> shared memory space mapped upfront, allocate/write each message within the >> space, and then signal to the other process "you can find a new message >> located at position X", "I am done with the message located at position Y", >> etc. >> >> This has always been something I intended to implement, but so far it >> hasn't come up as a priority. Sending messages over a unix socket is easy >> and works well, so I'd recommend trying that first, and considering shared >> memory transport as a possible optimization later on. >> >> -Kenton >> >> On Sun, Jan 20, 2019 at 11:23 PM Omega Ishendra <omegai...@gmail.com> >> wrote: >> >>> Hi all, >>> >>> I know that communication between two processes can be done mainly using >>> two methods. >>> >>> 1. Shared Memory >>> 2. Message passing >>> >>> >>> my initial idea about capnp is, it is using "Message Passing". >>> >>> Is my idea correct? >>> Can we do Inter-Process-Communication using shared memory in capnp? >>> which is the faster? >>> >>> Thanks, >>> >>> -- >>> You received this message because you are subscribed to the Google >>> Groups "Cap'n Proto" group. >>> To unsubscribe from this group and stop receiving emails from it, send >>> an email to capnproto+...@googlegroups.com. >>> Visit this group at https://groups.google.com/group/capnproto. >>> >> -- > You received this message because you are subscribed to the Google Groups > "Cap'n Proto" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to capnproto+unsubscr...@googlegroups.com. > To view this discussion on the web visit > https://groups.google.com/d/msgid/capnproto/7c4811b6-1468-419a-81e4-4610cd818818n%40googlegroups.com > <https://groups.google.com/d/msgid/capnproto/7c4811b6-1468-419a-81e4-4610cd818818n%40googlegroups.com?utm_medium=email&utm_source=footer> > . > -- You received this message because you are subscribed to the Google Groups "Cap'n Proto" group. To unsubscribe from this group and stop receiving emails from it, send an email to capnproto+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/capnproto/CAJouXQnnBAddUuiP%3DOHYK7AvQt9yzQuyTAdwfrJLi5mX1xDrpg%40mail.gmail.com.
