From: Kirill Yukhin <kyukhin@tarantool.org>
To: Alexander Turenko <alexander.turenko@tarantool.org>
Cc: tarantool-patches@dev.tarantool.org
Subject: Re: [Tarantool-patches] [small] Revert "Free all slabs on region reset"
Date: Wed, 29 Jan 2020 12:59:03 +0300 [thread overview]
Message-ID: <20200129095903.4jor3fgpoiuwiug7@tarantool.org> (raw)
In-Reply-To: <4e734e626aba336b27ec85790747c657d29c0338.1580284383.git.alexander.turenko@tarantool.org>
Hello,
On 29 янв 11:06, Alexander Turenko wrote:
> This reverts commit 67d7ab44ab09df3356929e3692a03321b31f3ebb.
>
> The goal of the reverted commit was to fix flaky fails of tarantool
> tests that checks amount of memory used by a fiber:
>
> | fiber.info()[fiber.self().id()].memory.used
>
> It also attempts to overcome the situation when a fiber holds some
> amount of memory, which is not used in any way. The high limit of such
> memory is controlled by a threshold in fiber_gc() tarantool's function
> (128 KiB at the moment):
>
> | void
> | fiber_gc(void)
> | {
> | if (region_used(&fiber()->gc) < 128 * 1024) {
> | region_reset(&fiber()->gc);
> | return;
> | }
> |
> | region_free(&fiber()->gc);
> | }
>
> The reverted commit, however, leads to significant performance
> degradation on certain workloads (see #4736). So the revertion fixes the
> performance degradation and opens the problem with tests, which is
> tracked in #4750.
>
> Related to #12
> Related to https://github.com/tarantool/tarantool/issues/4750
> Fixes https://github.com/tarantool/tarantool/issues/4736
I've checked your patch into tarantool/small and bumped new version
in master, 2.3, 2.2 and, as exception 2.1.
--
Regards, Kirill Yukhin
next prev parent reply other threads:[~2020-01-29 9:59 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-01-29 8:06 Alexander Turenko
2020-01-29 9:59 ` Kirill Yukhin [this message]
2020-01-29 21:41 ` Konstantin Osipov
2020-01-30 7:23 ` Alexander Turenko
2020-01-30 8:21 ` Konstantin Osipov
2020-01-30 11:03 ` Alexander Turenko
2020-01-30 12:16 ` Konstantin Osipov
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