From: Bart Van Assche <bart.vanassche@gmail.com>
To: "Ross S. W. Walker" <RWalker@medallion.com>
Cc: Vladislav Bolkhovitin <vst@vlnb.net>,
iscsitarget-devel@lists.sourceforge.net,
scst-devel <scst-devel@lists.sourceforge.net>,
linux-kernel@vger.kernel.org, linux-scsi@vger.kernel.org,
stgt@vger.kernel.org
Subject: Re: [Iscsitarget-devel] [Scst-devel] ISCSI-SCST performance (withalso IET and STGT data)
Date: Wed, 1 Apr 2009 08:29:19 +0200 [thread overview]
Message-ID: <e2e108260903312329u118a54bfn3107fdca4b3e2b1d@mail.gmail.com> (raw)
In-Reply-To: <E2BB8074E5500C42984D980D4BD78EF9029E3D0B@MFG-NYC-EXCH2.mfg.prv>
On Tue, Mar 31, 2009 at 8:43 PM, Ross S. W. Walker
<RWalker@medallion.com> wrote:
> IET just needs to fix how it does it workload with CFQ which
> somehow SCST has overcome. Of course SCST tweaks the Linux kernel to
> gain some extra speed.
I'm not familiar with the implementation details of CFQ, but I know
that one of the changes between SCST 1.0.0 and SCST 1.0.1 is that the
default number of kernel threads of the scst_vdisk kernel module has
been increased to 5. Could this explain the performance difference
between SCST and IET for FILEIO and BLOCKIO ?
Bart.
next prev parent reply other threads:[~2009-04-01 6:29 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-03-30 17:33 ISCSI-SCST performance (with also " Vladislav Bolkhovitin
[not found] ` <e2e108260903301106y2b750c23kfab978567f3de3a0@mail.gmail.com>
2009-03-30 18:33 ` [Scst-devel] " Vladislav Bolkhovitin
2009-03-30 18:53 ` Bart Van Assche
2009-03-31 17:37 ` Vladislav Bolkhovitin
2009-03-31 18:43 ` [Iscsitarget-devel] [Scst-devel] ISCSI-SCST performance (withalso " Ross S. W. Walker
2009-04-01 6:29 ` Bart Van Assche [this message]
2009-04-01 12:20 ` Ross Walker
2009-04-01 20:23 ` James Bottomley
2009-04-02 7:38 ` [Scst-devel] [Iscsitarget-devel] ISCSI-SCST performance (with also " Vladislav Bolkhovitin
2009-04-02 9:02 ` Vladislav Bolkhovitin
2009-04-02 14:06 ` Ross S. W. Walker
2009-04-02 14:14 ` Ross S. W. Walker
2009-04-02 15:36 ` Vladislav Bolkhovitin
2009-04-02 17:19 ` Ross S. W. Walker
2009-04-01 20:14 ` Bart Van Assche
2009-04-02 17:16 ` [Scst-devel] " Vladislav Bolkhovitin
2009-04-03 17:08 ` Bart Van Assche
2009-04-03 17:13 ` [Scst-devel] ISCSI-SCST performance (with also IET and STGTdata) Sufficool, Stanley
2009-04-03 17:52 ` Bart Van Assche
2009-04-04 8:04 ` [Scst-devel] ISCSI-SCST performance (with also IET and STGT data) Bart Van Assche
2009-04-17 18:11 ` Vladislav Bolkhovitin
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