From: James Bottomley <James.Bottomley@HansenPartnership.com>
To: Ming Lei <ming.lei@redhat.com>,
linux-scsi@vger.kernel.org,
"Martin K . Petersen" <martin.petersen@oracle.com>
Cc: Bart Van Assche <bvanassche@acm.org>,
Christoph Hellwig <hch@lst.de>,
John Garry <john.garry@huawei.com>
Subject: Re: [PATCH V2] scsi: put hot fields of scsi_host_template into one cacheline
Date: Wed, 22 Apr 2020 07:41:30 -0700 [thread overview]
Message-ID: <1587566490.3485.7.camel@HansenPartnership.com> (raw)
In-Reply-To: <20200422095425.319674-1-ming.lei@redhat.com>
On Wed, 2020-04-22 at 17:54 +0800, Ming Lei wrote:
> The following three fields of scsi_host_template are referenced in
> scsi IO submission path, so put them together into one cacheline:
>
> - cmd_size
> - queuecommand
> - commit_rqs
Are there benchmarks to show this actually makes a difference, if so,
how much?
James
next prev parent reply other threads:[~2020-04-22 14:41 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-04-22 9:54 [PATCH V2] scsi: put hot fields of scsi_host_template into one cacheline Ming Lei
2020-04-22 10:06 ` John Garry
2020-04-22 14:36 ` Bart Van Assche
2020-04-22 14:41 ` James Bottomley [this message]
2020-04-23 1:48 ` Ming Lei
2020-04-23 6:02 ` Christoph Hellwig
2020-04-24 18:14 ` Martin K. Petersen
2020-05-01 22:27 ` Douglas Gilbert
2020-05-04 1:09 ` Ming Lei
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