From: Vladislav Shpilevoy <v.shpilevoy@tarantool.org>
To: Cyrill Gorcunov <gorcunov@gmail.com>,
tml <tarantool-patches@dev.tarantool.org>
Subject: Re: [Tarantool-patches] [PATCH 1/5] qsync: eliminate redundant writes
Date: Fri, 10 Jul 2020 22:31:22 +0200 [thread overview]
Message-ID: <bbbafe41-1773-2b80-6ac7-1661711cde9b@tarantool.org> (raw)
In-Reply-To: <20200710075605.217824-2-gorcunov@gmail.com>
Hi!
On 10/07/2020 09:56, Cyrill Gorcunov wrote:
> Instead of updating is_sync variable on every
> cycle write it once.
>
> Signed-off-by: Cyrill Gorcunov <gorcunov@gmail.com>
> ---
> src/box/txn.c | 8 ++++++--
> 1 file changed, 6 insertions(+), 2 deletions(-)
>
> diff --git a/src/box/txn.c b/src/box/txn.c
> index a2df23833..49b2b2649 100644
> --- a/src/box/txn.c
> +++ b/src/box/txn.c
> @@ -567,8 +567,12 @@ txn_journal_entry_new(struct txn *txn)
> if (stmt->row == NULL)
> continue;
>
> - is_sync = is_sync || (stmt->space != NULL &&
> - stmt->space->def->opts.is_sync);
> + if (!is_sync) {
> + if (stmt->space != NULL &&
> + stmt->space->def->opts.is_sync) {
> + is_sync = true;
> + }
> + }
>
> if (stmt->row->replica_id == 0)
> *local_row++ = stmt->row;
The 'redundant' writes were done intentionally, to avoid unnecessary
branching. I see no point in this change.
next prev parent reply other threads:[~2020-07-10 20:31 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-07-10 7:56 [Tarantool-patches] [PATCH 0/5] qsync: code cleanup Cyrill Gorcunov
2020-07-10 7:56 ` [Tarantool-patches] [PATCH 1/5] qsync: eliminate redundant writes Cyrill Gorcunov
2020-07-10 20:31 ` Vladislav Shpilevoy [this message]
2020-07-10 21:04 ` Cyrill Gorcunov
2020-07-10 7:56 ` [Tarantool-patches] [PATCH 2/5] qsync: add a comment about sync txn in journal allocation Cyrill Gorcunov
2020-07-10 20:33 ` Vladislav Shpilevoy
2020-07-10 20:34 ` Vladislav Shpilevoy
2020-07-10 21:07 ` Cyrill Gorcunov
2020-07-10 21:08 ` Vladislav Shpilevoy
2020-07-11 16:08 ` Vladislav Shpilevoy
2020-07-10 7:56 ` [Tarantool-patches] [PATCH 3/5] qsync: txn_commit_async -- drop redundant variable Cyrill Gorcunov
2020-07-10 20:35 ` Vladislav Shpilevoy
2020-07-10 21:10 ` Cyrill Gorcunov
2020-07-10 21:28 ` Vladislav Shpilevoy
2020-07-10 21:36 ` Cyrill Gorcunov
2020-07-11 14:10 ` Vladislav Shpilevoy
2020-07-11 15:18 ` Cyrill Gorcunov
2020-07-10 7:56 ` [Tarantool-patches] [PATCH 4/5] qsync: txn_commit -- use txn flag instead of caching variable Cyrill Gorcunov
2020-07-10 20:36 ` Vladislav Shpilevoy
2020-07-10 21:27 ` Cyrill Gorcunov
2020-07-10 7:56 ` [Tarantool-patches] [PATCH 5/5] qsync: sanitize txn_limbo_on_rollback Cyrill Gorcunov
2020-07-10 20:38 ` Vladislav Shpilevoy
2020-07-11 15:46 ` Cyrill Gorcunov
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