From: Benjamin Herrenschmidt <benh@kernel.crashing.org>
To: Liu Qiang-B32616 <B32616@freescale.com>
Cc: "jgarzik@pobox.com" <jgarzik@pobox.com>,
"linux-ide@vger.kernel.org" <linux-ide@vger.kernel.org>,
"linuxppc-dev@lists.ozlabs.org" <linuxppc-dev@lists.ozlabs.org>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>
Subject: RE: [PATCH V2 RESEND] fsl-sata: I/O load balancing
Date: Fri, 17 Feb 2012 14:17:40 +1100 [thread overview]
Message-ID: <1329448660.2892.42.camel@pasglop> (raw)
In-Reply-To: <BCB48C05FCE8BC4D9E61E841ECBE6DB702B97D@039-SN2MPN1-013.039d.mgd.msft.net>
On Fri, 2012-02-17 at 01:54 +0000, Liu Qiang-B32616 wrote:
> The default will be set in a common interface fsl_sata_set_irq_coalescing when
> initialize the controller. This interface will check the range of intr count
> and ticks and make sure the values are reasonably.
Allright, but the current defaults are basically no coalescing right ?
> It's hard to find a aggressive value to adapt all scenarios, so I use echo to adjust
> the value. I remember P5020 have some performance issue, I will check it.
> BTW, which filesystem do you use? Ext2 is lower than ext4 because metadata is
> continuously wrote to disk. You can try ext4 or xfs.
ext3 at the moment, I plan to switch to ext4 when I finish that fsck
pass which is taking hours... I am not aware of the 5020 performance
issues, is this something documented and/or fixable ?
Cheers,
Ben.
WARNING: multiple messages have this Message-ID (diff)
From: Benjamin Herrenschmidt <benh@kernel.crashing.org>
To: Liu Qiang-B32616 <B32616@freescale.com>
Cc: "linux-ide@vger.kernel.org" <linux-ide@vger.kernel.org>,
"jgarzik@pobox.com" <jgarzik@pobox.com>,
"linuxppc-dev@lists.ozlabs.org" <linuxppc-dev@lists.ozlabs.org>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>
Subject: RE: [PATCH V2 RESEND] fsl-sata: I/O load balancing
Date: Fri, 17 Feb 2012 14:17:40 +1100 [thread overview]
Message-ID: <1329448660.2892.42.camel@pasglop> (raw)
In-Reply-To: <BCB48C05FCE8BC4D9E61E841ECBE6DB702B97D@039-SN2MPN1-013.039d.mgd.msft.net>
On Fri, 2012-02-17 at 01:54 +0000, Liu Qiang-B32616 wrote:
> The default will be set in a common interface fsl_sata_set_irq_coalescing when
> initialize the controller. This interface will check the range of intr count
> and ticks and make sure the values are reasonably.
Allright, but the current defaults are basically no coalescing right ?
> It's hard to find a aggressive value to adapt all scenarios, so I use echo to adjust
> the value. I remember P5020 have some performance issue, I will check it.
> BTW, which filesystem do you use? Ext2 is lower than ext4 because metadata is
> continuously wrote to disk. You can try ext4 or xfs.
ext3 at the moment, I plan to switch to ext4 when I finish that fsck
pass which is taking hours... I am not aware of the 5020 performance
issues, is this something documented and/or fixable ?
Cheers,
Ben.
next prev parent reply other threads:[~2012-02-17 3:17 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-02-15 5:49 [PATCH V2 RESEND] fsl-sata: I/O load balancing Qiang Liu
2012-02-15 5:49 ` Qiang Liu
2012-02-15 5:49 ` Qiang Liu
2012-02-15 7:22 ` Li Yang
2012-02-15 7:22 ` Li Yang
2012-02-15 7:29 ` Liu Qiang-B32616
2012-02-15 7:29 ` Liu Qiang-B32616
2012-02-15 7:29 ` Liu Qiang-B32616
2012-02-17 0:40 ` Benjamin Herrenschmidt
2012-02-17 0:40 ` Benjamin Herrenschmidt
2012-02-17 1:54 ` Liu Qiang-B32616
2012-02-17 1:54 ` Liu Qiang-B32616
2012-02-17 1:54 ` Liu Qiang-B32616
2012-02-17 3:17 ` Benjamin Herrenschmidt [this message]
2012-02-17 3:17 ` Benjamin Herrenschmidt
2012-02-17 3:30 ` Liu Qiang-B32616
2012-02-17 3:30 ` Liu Qiang-B32616
2012-02-17 3:30 ` Liu Qiang-B32616
2012-02-17 3:09 ` Li Yang-R58472
2012-02-17 3:09 ` Li Yang-R58472
2012-02-17 3:18 ` Benjamin Herrenschmidt
2012-02-17 3:18 ` Benjamin Herrenschmidt
2012-02-20 4:40 ` Zang Roy-R61911
2012-02-20 4:40 ` Zang Roy-R61911
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