From: Konstantin Osipov <kostja@tarantool.org>
To: Vladimir Davydov <vdavydov.dev@gmail.com>
Cc: tarantool-patches@freelists.org
Subject: Re: [PATCH 1/2] xlog: use ev_sleep instead of fiber_sleep for rate limiting
Date: Thu, 7 Jun 2018 16:11:52 +0300 [thread overview]
Message-ID: <20180607131152.GC23310@chai> (raw)
In-Reply-To: <20180604095133.iaxtdven3kjpuff5@esperanza>
* Vladimir Davydov <vdavydov.dev@gmail.com> [18/06/04 23:48]:
> Anyway, yielding in xlog_write() may be unexpected from caller's pov,
> because this function is blocking (writes a file) and isn't supposed
> to yield. One usually hands it over to coio or a worker thread, where
> yielding is pointless.
>
> >
> > We will end up needing it for other things and it's nearly free.
>
> What things?
Multiple things going on in the writer thread. Fiber-based
programming is a powerful concept, and we're already using cbus
for writer threads. Any kind of monitoring, collecting statistics,
periodic work is easier done when you have fiber runtime
available.
--
Konstantin Osipov, Moscow, Russia, +7 903 626 22 32
http://tarantool.io - www.twitter.com/kostja_osipov
next prev parent reply other threads:[~2018-06-07 13:11 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-05-29 15:19 [PATCH 0/2] vinyl: allow to limit dump bandwidth Vladimir Davydov
2018-05-29 15:19 ` [PATCH 1/2] xlog: use ev_sleep instead of fiber_sleep for rate limiting Vladimir Davydov
2018-06-01 17:52 ` Konstantin Osipov
2018-06-04 9:51 ` Vladimir Davydov
2018-06-07 13:11 ` Konstantin Osipov [this message]
2018-05-29 15:19 ` [PATCH 2/2] vinyl: apply box.cfg.snap_io_rate_limit to dump/compaction Vladimir Davydov
2018-06-01 17:56 ` Konstantin Osipov
2018-06-04 9:55 ` Vladimir Davydov
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