From: "Drew DeVault" <sir@cmpwn.com>
To: <io-uring@vger.kernel.org>
Subject: Confusion regarding the use of OP_TIMEOUT
Date: Wed, 19 May 2021 15:51:35 -0400 [thread overview]
Message-ID: <CBHHFOFELZZ3.C2MWHZF690NB@taiga> (raw)
Hi folks! I'm trying to use IO_TIMEOUT to insert a pause in the middle
of my SQ. I set the off (desired number of events to wait for) to zero,
which according to the docs just makes it behave like a timer.
Essentially, I want the following:
[operations...]
OP_TIMEOUT
[operations...]
To be well-ordered, so that the second batch executes after the first.
To accomplish this, I've tried to submit the first operation of the
second batch with IO_DRAIN, which causes the CQE to be delayed, but
ultimately it fails with EINTR instead of just waiting to execute.
I understand that the primary motivator for OP_TIMEOUT is to provide a
timeout functionality for other CQEs. Is my use-case not accomodated by
io_uring?
next reply other threads:[~2021-05-19 19:57 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-05-19 19:51 Drew DeVault [this message]
2021-05-20 10:11 ` Confusion regarding the use of OP_TIMEOUT Pavel Begunkov
2021-05-20 21:58 ` Drew DeVault
[not found] <af3b1313-2e0a-16fc-facd-aa15dc69f64e@emobrien.com>
2021-05-20 0:32 ` Alex O'Brien
[not found] <24207f62-fa0b-a52a-fa06-a39b4e208dd6@emobrien.com>
2021-05-20 0:34 ` Alex O'Brien
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