From: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
To: mitake.hitoshi@lab.ntt.co.jp
Cc: stgt@vger.kernel.org, mitake.hitoshi@gmail.com
Subject: Re: [PATCH] sheepdog: fine grained locking in write path
Date: Tue, 21 Apr 2015 18:47:53 +0900 (JST) [thread overview]
Message-ID: <20150421.184753.1568838937885752472.fujita.tomonori@lab.ntt.co.jp> (raw)
In-Reply-To: <1429608833-11636-1-git-send-email-mitake.hitoshi@lab.ntt.co.jp>
On Tue, 21 Apr 2015 18:33:53 +0900
Hitoshi Mitake <mitake.hitoshi@lab.ntt.co.jp> wrote:
> Current sheepdog driver has a big write lock section. It harms write
> performance significantly. This patch removes a needless big write
> lock section with checking submitted requests can cause COW or
> not. The write performance can be improved significantly.
>
> In a case of 4k rand write by fio:
> - before: 1144 IOPS
> - after: 19074 IOPS
>
> Signed-off-by: Hitoshi Mitake <mitake.hitoshi@lab.ntt.co.jp>
> ---
> usr/bs_sheepdog.c | 14 +++++++++++++-
> 1 file changed, 13 insertions(+), 1 deletion(-)
Applied, thanks.
prev parent reply other threads:[~2015-04-21 9:47 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-04-21 9:33 [PATCH] sheepdog: fine grained locking in write path Hitoshi Mitake
2015-04-21 9:47 ` FUJITA Tomonori [this message]
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