From: Uma Krishnan <ukrishn@linux.vnet.ibm.com>
To: linux-scsi@vger.kernel.org,
James Bottomley <James.Bottomley@HansenPartnership.com>,
"Martin K. Petersen" <martin.petersen@oracle.com>,
"Matthew R. Ochs" <mrochs@linux.vnet.ibm.com>,
"Manoj N. Kumar" <manoj@linux.vnet.ibm.com>
Cc: linuxppc-dev@lists.ozlabs.org,
Brian King <brking@linux.vnet.ibm.com>,
Ian Munsie <imunsie@au1.ibm.com>,
Andrew Donnellan <andrew.donnellan@au1.ibm.com>,
Frederic Barrat <fbarrat@linux.vnet.ibm.com>,
Christophe Lombard <clombard@linux.vnet.ibm.com>
Subject: Re: [PATCH 7/7] cxlflash: Increase cmd_per_lun for better throughput
Date: Tue, 8 Mar 2016 11:56:42 -0600 [thread overview]
Message-ID: <56DF125A.8000202@linux.vnet.ibm.com> (raw)
In-Reply-To: <1457128520-53056-7-git-send-email-ukrishn@linux.vnet.ibm.com>
On 3/4/2016 3:55 PM, Uma Krishnan wrote:
> From: "Manoj N. Kumar" <manoj@linux.vnet.ibm.com>
>
> With the current value of cmd_per_lun at 16, the throughput
> over a single adapter is limited to around 150kIOPS.
>
> Increase the value of cmd_per_lun to 256 to improve
> throughput. With this change a single adapter is able to
> attain close to the maximum throughput (380kIOPS).
> Also change the number of RRQ entries that can be queued.
>
> Signed-off-by: Manoj N. Kumar <manoj@linux.vnet.ibm.com>
Reviewed-by: Uma Krishnan <ukrishn@linux.vnet.ibm.com>
next prev parent reply other threads:[~2016-03-08 17:56 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-03-04 21:53 [PATCH 0/7] Miscellaneous patches to support cxlflash in PowerVM Uma Krishnan
2016-03-04 21:55 ` [PATCH 1/7] cxlflash: Simplify PCI registration Uma Krishnan
2016-03-04 21:55 ` [PATCH 2/7] cxlflash: Unmap problem state area before detaching master context Uma Krishnan
2016-03-07 18:33 ` Matthew R. Ochs
2016-03-04 21:55 ` [PATCH 3/7] cxlflash: Split out context initialization Uma Krishnan
2016-03-08 17:55 ` Uma Krishnan
2016-03-04 21:55 ` [PATCH 4/7] cxlflash: Simplify attach path error cleanup Uma Krishnan
2016-03-08 17:55 ` Uma Krishnan
2016-03-04 21:55 ` [PATCH 5/7] cxlflash: Reorder user context initialization Uma Krishnan
2016-03-07 18:37 ` Matthew R. Ochs
2016-03-04 21:55 ` [PATCH 6/7] cxlflash: Fix to avoid unnecessary scan with internal LUNs Uma Krishnan
2016-03-07 18:45 ` Matthew R. Ochs
2016-03-08 17:56 ` Uma Krishnan
2016-03-04 21:55 ` [PATCH 7/7] cxlflash: Increase cmd_per_lun for better throughput Uma Krishnan
2016-03-07 18:45 ` Matthew R. Ochs
2016-03-08 17:56 ` Uma Krishnan [this message]
2016-03-07 18:30 ` [PATCH 1/7] cxlflash: Simplify PCI registration Matthew R. Ochs
2016-03-08 17:54 ` Uma Krishnan
2016-03-09 2:21 ` [PATCH 0/7] Miscellaneous patches to support cxlflash in PowerVM Martin K. Petersen
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