From: Konstantin Osipov <kostja.osipov@gmail.com> To: Cyrill Gorcunov <gorcunov@gmail.com> Cc: tml <tarantool-patches@dev.tarantool.org> Subject: Re: [Tarantool-patches] [PATCH 2/5] lua/fio: Add lbox_fio_push_error as a separate helper Date: Fri, 29 Nov 2019 14:22:03 +0300 [thread overview] Message-ID: <20191129112203.GB7760@atlas> (raw) In-Reply-To: <20191129094726.GB19879@uranus> * Cyrill Gorcunov <gorcunov@gmail.com> [19/11/29 14:06]: > > OK, now I get why you simply use write() in popen API - you > > always wrap all calls to popen with a eio call. But why? > > Because there could be calls with higher priority. coio > keeps requests in prio-heap (or similar) so we should > follow the scheme and every call to popen should be > dispatched in compare with other calls. I don't think you should bother with this. I don't see any practical implication of doing it through coio, except overhead/complexity it brings. > > Isn't it sufficient to only wrap vfork, everything else > > can be done in the main thread, what do you think? > > You mean to call popen_helpers directly? From programming > pov I would love to make it so, the code base would shrink > a lot but I fear this won't be looking as a solid design. > Currently all our i/o goes via coio and scheduled. To be > honest I don't know yet which solution would be better. Don't mix up coio and eio please. coio is cooperative-wihtin-the-same-thread. eio is async via a thread pool. Eio should be killed altogether now that asyncio in linux is mature enough, and there is io_uring. eio is just a legacy from the times when there was no good non-blocking file io on linux. > Gimme some more time to investigate, I think we could > gather statistics once things settle down and remove > coio calls to popen if we decide. Thanks it is internal > stuff hidden from Lua users and they will not have to > change anything. > > Cyrill -- Konstantin Osipov, Moscow, Russia
next prev parent reply other threads:[~2019-11-29 11:22 UTC|newest] Thread overview: 34+ messages / expand[flat|nested] mbox.gz Atom feed top 2019-11-28 20:45 [Tarantool-patches] [PATCH 0/5] popen: Add ability to run external process Cyrill Gorcunov 2019-11-28 20:45 ` [Tarantool-patches] [PATCH 1/5] popen: Introduce a backend engine Cyrill Gorcunov 2019-11-29 5:52 ` Konstantin Osipov 2019-11-29 9:57 ` Cyrill Gorcunov 2019-11-29 5:59 ` Konstantin Osipov 2019-11-29 9:40 ` Cyrill Gorcunov 2019-11-29 11:19 ` Konstantin Osipov 2019-11-29 11:36 ` Cyrill Gorcunov 2019-11-29 14:50 ` Konstantin Osipov 2019-11-29 15:14 ` Cyrill Gorcunov 2019-11-29 15:17 ` Cyrill Gorcunov 2019-11-29 18:31 ` Konstantin Osipov 2019-11-29 19:17 ` Cyrill Gorcunov 2019-11-29 22:36 ` Cyrill Gorcunov 2019-11-30 4:21 ` Konstantin Osipov 2019-11-30 7:48 ` Cyrill Gorcunov 2019-11-30 4:14 ` Konstantin Osipov 2019-11-30 7:36 ` Cyrill Gorcunov 2019-11-30 10:04 ` Konstantin Osipov 2019-11-30 10:47 ` Cyrill Gorcunov 2019-11-30 10:54 ` Cyrill Gorcunov 2019-11-30 12:16 ` Cyrill Gorcunov 2019-11-30 20:30 ` Konstantin Osipov 2019-11-30 20:36 ` Cyrill Gorcunov 2019-12-13 2:50 ` Alexander Turenko 2019-11-28 20:45 ` [Tarantool-patches] [PATCH 2/5] lua/fio: Add lbox_fio_push_error as a separate helper Cyrill Gorcunov 2019-11-29 6:02 ` Konstantin Osipov 2019-11-29 9:47 ` Cyrill Gorcunov 2019-11-29 11:22 ` Konstantin Osipov [this message] 2019-11-29 11:42 ` Cyrill Gorcunov 2019-11-29 14:51 ` Konstantin Osipov 2019-11-28 20:45 ` [Tarantool-patches] [PATCH 3/5] popen/fio: Merge popen engine into fio internal module Cyrill Gorcunov 2019-11-28 20:45 ` [Tarantool-patches] [PATCH 4/5] popen/fio: Implement lua interface for a popen object Cyrill Gorcunov 2019-11-28 20:45 ` [Tarantool-patches] [PATCH 5/5] test: Add app/popen test Cyrill Gorcunov
Reply instructions: You may reply publicly to this message via plain-text email using any one of the following methods: * Save the following mbox file, import it into your mail client, and reply-to-all from there: mbox Avoid top-posting and favor interleaved quoting: https://en.wikipedia.org/wiki/Posting_style#Interleaved_style * Reply using the --to, --cc, and --in-reply-to switches of git-send-email(1): git send-email \ --in-reply-to=20191129112203.GB7760@atlas \ --to=kostja.osipov@gmail.com \ --cc=gorcunov@gmail.com \ --cc=tarantool-patches@dev.tarantool.org \ --subject='Re: [Tarantool-patches] [PATCH 2/5] lua/fio: Add lbox_fio_push_error as a separate helper' \ /path/to/YOUR_REPLY https://kernel.org/pub/software/scm/git/docs/git-send-email.html * If your mail client supports setting the In-Reply-To header via mailto: links, try the mailto: link
This is a public inbox, see mirroring instructions for how to clone and mirror all data and code used for this inbox