From: Cyrill Gorcunov <gorcunov@gmail.com> To: "Георгий Кириченко" <georgy@tarantool.org> Cc: tarantool-patches@freelists.org Subject: [tarantool-patches] Re: [RFC] fiber: Increase default stack size Date: Fri, 22 Feb 2019 10:46:07 +0300 [thread overview] Message-ID: <20190222074607.GU7198@uranus> (raw) In-Reply-To: <7936473.6eviP72C8M@home.lan> On Fri, Feb 22, 2019 at 10:38:42AM +0300, Георгий Кириченко wrote: > Hi Cyrill! Hi! > Thanks for the patch, please see some comments bellow. > I like your approach but I think we should do it in a different manner: we > could poison 64k page of a fiber stack on start and then check the poison mark > when fiber finished. If watermark was overwritten by fiber activity we could use > madvise in order to decrease RSS usage. I somehow fail to see how it is different from the current scheme. In the patch we put single 8 16 bytes poison at 64K (well, page aligned offset to be precise) and once the fiber scheduled out we test it. I suspect the difference you mean is to _when_ test the poison? Or you mean to poison the whole 64K? p.s. You know, I think this stack limits *must not* be fixed in size but rather configurable from some parameters (getenv or something). Otherwise it will be an endless run and catch game.
next prev parent reply other threads:[~2019-02-22 7:46 UTC|newest] Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top 2019-02-21 21:26 Cyrill Gorcunov 2019-02-22 7:38 ` [tarantool-patches] " Георгий Кириченко 2019-02-22 7:46 ` Cyrill Gorcunov [this message] 2019-02-22 9:24 ` Георгий Кириченко 2019-02-22 9:45 ` Cyrill Gorcunov 2019-02-22 10:48 ` [tarantool-patches] " Alexander Turenko 2019-02-22 10:57 ` 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=20190222074607.GU7198@uranus \ --to=gorcunov@gmail.com \ --cc=georgy@tarantool.org \ --cc=tarantool-patches@freelists.org \ --subject='[tarantool-patches] Re: [RFC] fiber: Increase default stack size' \ /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