From: "Martin K. Petersen" <martin.petersen@oracle.com>
To: "Michael Kelley (EOSG)" <Michael.H.Kelley@microsoft.com>
Cc: Stephen Hemminger <sthemmin@microsoft.com>,
"linux-scsi@vger.kernel.org" <linux-scsi@vger.kernel.org>,
"martin.petersen@oracle.com" <martin.petersen@oracle.com>,
"JBottomley@odin.com" <JBottomley@odin.com>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
"longi@microsoft.com" <longi@microsoft.com>,
"devel@linuxdriverproject.org" <devel@linuxdriverproject.org>
Subject: Re: [PATCH 1/1] scsi: storvsc: Spread interrupts when picking a channel for I/O requests
Date: Tue, 06 Feb 2018 19:39:17 -0500 [thread overview]
Message-ID: <yq160793a6i.fsf@oracle.com> (raw)
In-Reply-To: <1516831913-26013-1-git-send-email-mikelley@ntdev.microsoft.com> (Michael Kelley's message of "Wed, 24 Jan 2018 22:14:08 +0000")
Michael,
> Update the algorithm in storvsc_do_io to look for a channel starting
> with the current CPU + 1 and wrap around (within the current NUMA
> node). This spreads VMbus interrupts more evenly across CPUs. Previous
> code always started with first CPU in the current NUMA node, skewing
> the interrupt load to that CPU.
Applied to 4.16/scsi-fixes. Thanks!
--
Martin K. Petersen Oracle Linux Engineering
WARNING: multiple messages have this Message-ID (diff)
From: "Martin K. Petersen" <martin.petersen@oracle.com>
To: "Michael Kelley \(EOSG\)" <Michael.H.Kelley@microsoft.com>
Cc: Stephen Hemminger <sthemmin@microsoft.com>,
"linux-scsi@vger.kernel.org" <linux-scsi@vger.kernel.org>,
"martin.petersen@oracle.com" <martin.petersen@oracle.com>,
"JBottomley@odin.com" <JBottomley@odin.com>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
"longi@microsoft.com" <longi@microsoft.com>,
"devel@linuxdriverproject.org" <devel@linuxdriverproject.org>
Subject: Re: [PATCH 1/1] scsi: storvsc: Spread interrupts when picking a channel for I/O requests
Date: Tue, 06 Feb 2018 19:39:17 -0500 [thread overview]
Message-ID: <yq160793a6i.fsf@oracle.com> (raw)
In-Reply-To: <1516831913-26013-1-git-send-email-mikelley@ntdev.microsoft.com> (Michael Kelley's message of "Wed, 24 Jan 2018 22:14:08 +0000")
Michael,
> Update the algorithm in storvsc_do_io to look for a channel starting
> with the current CPU + 1 and wrap around (within the current NUMA
> node). This spreads VMbus interrupts more evenly across CPUs. Previous
> code always started with first CPU in the current NUMA node, skewing
> the interrupt load to that CPU.
Applied to 4.16/scsi-fixes. Thanks!
--
Martin K. Petersen Oracle Linux Engineering
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next prev parent reply other threads:[~2018-02-07 0:39 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-01-24 22:14 [PATCH 1/1] scsi: storvsc: Spread interrupts when picking a channel for I/O requests Michael Kelley (EOSG)
2018-01-24 22:14 ` Michael Kelley (EOSG)
2018-01-24 22:37 ` Michael Kelley (EOSG)
2018-01-24 22:37 ` Michael Kelley (EOSG)
2018-01-31 20:22 ` Long Li
2018-01-31 20:22 ` Long Li
2018-01-31 21:14 ` Michael Kelley (EOSG)
2018-01-31 21:14 ` Michael Kelley (EOSG)
2018-01-31 21:22 ` Long Li
2018-01-31 21:22 ` Long Li
2018-02-07 0:39 ` Martin K. Petersen [this message]
2018-02-07 0:39 ` Martin K. Petersen
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