From: Chaitanya Kulkarni <Chaitanya.Kulkarni@wdc.com>
To: Christoph Hellwig <hch@lst.de>
Cc: "kbusch@kernel.org" <kbusch@kernel.org>,
"sagi@grimberg.me" <sagi@grimberg.me>,
"linux-nvme@lists.infradead.org" <linux-nvme@lists.infradead.org>
Subject: Re: [PATCH V2 0/2] nvme: replace linked list with xarray for ns tracking
Date: Wed, 1 Jul 2020 18:41:20 +0000 [thread overview]
Message-ID: <BYAPR04MB496543EAC48207FED8B6E611866C0@BYAPR04MB4965.namprd04.prod.outlook.com> (raw)
In-Reply-To: 20200701053609.GA28056@lst.de
On 6/30/20 10:36 PM, Christoph Hellwig wrote:
> On Tue, Jun 30, 2020 at 07:25:15PM -0700, Chaitanya Kulkarni wrote:
>> Hi,
>>
>> This is a small patch-series which replaces ctrl->namespaces with
>> xarray for host-core and target-core. We can see following
>> performance improvement when running fio with 32 parallel jobs where
>> first 16 namespaces and last 16 namespaces are used for I/O. See [1] for
>> detailed performance numbers.
> Why would that make any difference given that we don't look up namespaces
> in the I/O path?
>
This is for the passthru series which uses nvme_find_get_ns() in the
fast path.
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prev parent reply other threads:[~2020-07-01 18:41 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-07-01 2:25 [PATCH V2 0/2] nvme: replace linked list with xarray for ns tracking Chaitanya Kulkarni
2020-07-01 2:25 ` [PATCH V2 1/2] nvme-core: use xarray for ctrl " Chaitanya Kulkarni
2020-07-01 13:12 ` Christoph Hellwig
2020-07-01 16:44 ` Keith Busch
2020-07-01 18:19 ` Chaitanya Kulkarni
2020-07-01 18:29 ` Keith Busch
2020-07-01 18:40 ` Chaitanya Kulkarni
2020-07-01 2:25 ` [PATCH V2 2/2] nvmet: use xarray for ctrl ns storing Chaitanya Kulkarni
2020-07-01 6:08 ` Christoph Hellwig
2020-07-01 18:36 ` Chaitanya Kulkarni
2020-07-01 5:36 ` [PATCH V2 0/2] nvme: replace linked list with xarray for ns tracking Christoph Hellwig
2020-07-01 13:21 ` Keith Busch
2020-07-01 16:49 ` Sagi Grimberg
2020-07-01 18:43 ` Chaitanya Kulkarni
2020-07-01 18:41 ` Chaitanya Kulkarni
2020-07-01 18:41 ` Chaitanya Kulkarni [this message]
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