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 04/10] box/txn: move setup of txn start to txn_prepare Date: Sat, 7 Mar 2020 00:30:03 +0300 [thread overview] Message-ID: <20200306213003.GD8140@atlas> (raw) In-Reply-To: <20200305122943.7324-5-gorcunov@gmail.com> * Cyrill Gorcunov <gorcunov@gmail.com> [20/03/05 15:32]: > For unification sake, we will handle nop transactions > via common helper for both sync and async cases. > > Signed-off-by: Cyrill Gorcunov <gorcunov@gmail.com> > --- > src/box/txn.c | 10 +++++++++- > 1 file changed, 9 insertions(+), 1 deletion(-) > > diff --git a/src/box/txn.c b/src/box/txn.c > index 9f61303ab..5dd52e6db 100644 > --- a/src/box/txn.c > +++ b/src/box/txn.c > @@ -554,6 +554,15 @@ txn_prepare(struct txn *txn) > trigger_clear(&txn->fiber_on_stop); > if (!txn_has_flag(txn, TXN_CAN_YIELD)) > trigger_clear(&txn->fiber_on_yield); > + > + /* > + * It is important to set start transaction > + * time at the last moment, when everything > + * is ready to initiate commit procedure, > + * just to be more precise in timings to > + * detect long WAL writes. > + */ I think this comment is misleading. There are no yields between start of txn_prepare() and end. There may appear yields when vinyl lock manager is more smart, but there are no yields now. So ev_monotonic_now returns exactly the same value regardless of where you call it. Otherwise lgtm. > + txn->start_tm = ev_monotonic_now(loop()); > return 0; > } > -- Konstantin Osipov, Moscow, Russia
next prev parent reply other threads:[~2020-03-06 21:30 UTC|newest] Thread overview: 28+ messages / expand[flat|nested] mbox.gz Atom feed top 2020-03-05 12:29 [Tarantool-patches] [PATCH 00/10] box/journal: redesign sync and async writes Cyrill Gorcunov 2020-03-05 12:29 ` [Tarantool-patches] [PATCH 01/10] box: recovery_journal_create -- set journal here Cyrill Gorcunov 2020-03-06 21:27 ` Konstantin Osipov 2020-03-05 12:29 ` [Tarantool-patches] [PATCH 02/10] box/txn: move fiber_set_txn to header Cyrill Gorcunov 2020-03-06 21:27 ` Konstantin Osipov 2020-03-05 12:29 ` [Tarantool-patches] [PATCH 03/10] box/txn: rename txn_write to txn_commit_async Cyrill Gorcunov 2020-03-06 21:28 ` Konstantin Osipov 2020-03-05 12:29 ` [Tarantool-patches] [PATCH 04/10] box/txn: move setup of txn start to txn_prepare Cyrill Gorcunov 2020-03-06 21:30 ` Konstantin Osipov [this message] 2020-03-18 12:38 ` Cyrill Gorcunov 2020-03-18 13:58 ` Konstantin Osipov 2020-03-18 14:09 ` Cyrill Gorcunov 2020-03-05 12:29 ` [Tarantool-patches] [PATCH 05/10] box/txn: add txn_commit_nop helper Cyrill Gorcunov 2020-03-06 21:30 ` Konstantin Osipov 2020-03-05 12:29 ` [Tarantool-patches] [PATCH 06/10] box/txn: unweave txn_commit from txn_commit_async Cyrill Gorcunov 2020-03-06 21:33 ` Konstantin Osipov 2020-03-05 12:29 ` [Tarantool-patches] [PATCH 07/10] box/txn: clear fiber storage right before journal write Cyrill Gorcunov 2020-03-06 21:34 ` Konstantin Osipov 2020-03-05 12:29 ` [Tarantool-patches] [PATCH 08/10] box/txn: move journal allocation into separate routine Cyrill Gorcunov 2020-03-06 21:35 ` Konstantin Osipov 2020-03-05 12:29 ` [Tarantool-patches] [PATCH 09/10] box/journal: journal_entry_new -- drop setting up callbacks Cyrill Gorcunov 2020-03-06 21:37 ` Konstantin Osipov 2020-03-06 21:41 ` Cyrill Gorcunov 2020-03-06 21:51 ` Konstantin Osipov 2020-03-06 21:57 ` Cyrill Gorcunov 2020-03-06 22:04 ` Konstantin Osipov 2020-03-05 12:29 ` [Tarantool-patches] [PATCH 10/10] box/journal: redesign sync and async writes Cyrill Gorcunov 2020-03-06 21:48 ` Konstantin Osipov
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