Re: Slow file transfer speeds with CFQ IO scheduler in some cases | KernelTrap

Re: Slow file transfer speeds with CFQ IO scheduler in some cases

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From: Christoph Hellwig <hch@...>

To: Jeff Layton <jlayton@...>

Cc: Jens Axboe <jens.axboe@...>, Jeff Moyer <jmoyer@...>, Vitaly V. Bursov <vitalyb@...>, <linux-kernel@...>, <bfields@...>

Subject: Re: Slow file transfer speeds with CFQ IO scheduler in some cases

Date: Wednesday, November 12, 2008 - 8:54 am

On Wed, Nov 12, 2008 at 07:45:03AM -0500, Jeff Layton wrote:

quoted text

> Ahh Good point...I wasn't thinking about it the right way. I guess what
> we really need is some way to tell that a series of I/O requests
> originated from the same client thread. NFS isn't really conducive to
> this...
>
> We might be able to do something like that with NFSv4 though. Maybe an
> io_context per state owner or something. That's probably not going to
> be trivial to implement however...

Talk to Greg Banks, he's been thinking about and working on an open
files cache for quite a while already.

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Messages in current thread:

Slow file transfer speeds with CFQ IO scheduler in some cases, Vitaly V. Bursov, (Sun Nov 9, 2:04 pm)

Re: Slow file transfer speeds with CFQ IO scheduler in some ..., Jens Axboe, (Mon Nov 10, 6:44 am)

Re: Slow file transfer speeds with CFQ IO scheduler in some ..., Jeff Moyer, (Mon Nov 10, 9:51 am)

Re: Slow file transfer speeds with CFQ IO scheduler in some ..., Jens Axboe, (Mon Nov 10, 9:56 am)

Re: Slow file transfer speeds with CFQ IO scheduler in some ..., Jeff Moyer, (Wed Nov 12, 2:32 pm)

Re: Slow file transfer speeds with CFQ IO scheduler in some ..., Vitaly V. Bursov, (Thu Nov 13, 2:54 am)

Re: Slow file transfer speeds with CFQ IO scheduler in some ..., Jeff Moyer, (Thu Nov 13, 10:32 am)

Re: Slow file transfer speeds with CFQ IO scheduler in some ..., Vitaly V. Bursov, (Thu Nov 13, 2:33 pm)

Re: Slow file transfer speeds with CFQ IO scheduler in some ..., Jens Axboe, (Wed Nov 12, 3:02 pm)

Re: Slow file transfer speeds with CFQ IO scheduler in some ..., Jeff Moyer, (Mon Nov 24, 11:33 am)

Re: Slow file transfer speeds with CFQ IO scheduler in some ..., Jens Axboe, (Mon Nov 24, 2:13 pm)

Re: Slow file transfer speeds with CFQ IO scheduler in some ..., Jeff Moyer, (Mon Nov 24, 2:50 pm)

Re: Slow file transfer speeds with CFQ IO scheduler in some ..., Jens Axboe, (Mon Nov 24, 2:51 pm)

Re: Slow file transfer speeds with CFQ IO scheduler in some ..., Wu Fengguang, (Thu Nov 13, 4:51 am)

Re: Slow file transfer speeds with CFQ IO scheduler in some ..., Vladislav Bolkhovitin, (Tue Nov 25, 6:59 am)

Re: Slow file transfer speeds with CFQ IO scheduler in some ..., Wu Fengguang, (Tue Nov 25, 7:30 am)

Re: Slow file transfer speeds with CFQ IO scheduler in some ..., Vladislav Bolkhovitin, (Tue Nov 25, 7:41 am)

Re: Slow file transfer speeds with CFQ IO scheduler in some ..., Wu Fengguang, (Tue Nov 25, 7:49 am)

Re: Slow file transfer speeds with CFQ IO scheduler in some ..., Vladislav Bolkhovitin, (Tue Nov 25, 8:03 am)

Re: Slow file transfer speeds with CFQ IO scheduler in some ..., Vladislav Bolkhovitin, (Tue Nov 25, 8:09 am)

Re: Slow file transfer speeds with CFQ IO scheduler in some ..., Wu Fengguang, (Tue Nov 25, 8:15 am)

Re: Slow file transfer speeds with CFQ IO scheduler in some ..., Vladislav Bolkhovitin, (Thu Nov 27, 1:46 pm)

Re: Slow file transfer speeds with CFQ IO scheduler in some ..., Wu Fengguang, (Thu Nov 27, 8:48 pm)

Re: Slow file transfer speeds with CFQ IO scheduler in some ..., Vitaly V. Bursov, (Thu Nov 13, 2:46 pm)

Re: Slow file transfer speeds with CFQ IO scheduler in some ..., Jens Axboe, (Thu Nov 13, 4:54 am)

Re: Slow file transfer speeds with CFQ IO scheduler in some ..., Wu Fengguang, (Thu Nov 13, 9:36 pm)

Re: Slow file transfer speeds with CFQ IO scheduler in some ..., Vladislav Bolkhovitin, (Tue Nov 25, 7:02 am)

Re: Slow file transfer speeds with CFQ IO scheduler in some ..., Jeff Moyer, (Tue Nov 25, 11:21 am)

Re: Slow file transfer speeds with CFQ IO scheduler in some ..., Vladislav Bolkhovitin, (Tue Nov 25, 12:17 pm)

Re: Slow file transfer speeds with CFQ IO scheduler in some ..., Wu Fengguang, (Tue Nov 25, 7:25 am)

Re: Slow file transfer speeds with CFQ IO scheduler in some ..., Vitaly V. Bursov, (Mon Nov 10, 1:16 pm)

Re: Slow file transfer speeds with CFQ IO scheduler in some ..., Jens Axboe, (Mon Nov 10, 1:35 pm)

Re: Slow file transfer speeds with CFQ IO scheduler in some ..., Vitaly V. Bursov, (Mon Nov 10, 2:27 pm)

Re: Slow file transfer speeds with CFQ IO scheduler in some ..., Jeff Moyer, (Mon Nov 10, 5:51 pm)

Re: Slow file transfer speeds with CFQ IO scheduler in some ..., Jens Axboe, (Tue Nov 11, 5:34 am)

Re: Slow file transfer speeds with CFQ IO scheduler in some ..., Jens Axboe, (Tue Nov 11, 5:35 am)

Re: Slow file transfer speeds with CFQ IO scheduler in some ..., Jens Axboe, (Tue Nov 11, 7:52 am)

Re: Slow file transfer speeds with CFQ IO scheduler in some ..., Vitaly V. Bursov, (Tue Nov 11, 12:53 pm)

Re: Slow file transfer speeds with CFQ IO scheduler in some ..., Jens Axboe, (Tue Nov 11, 2:06 pm)

Re: Slow file transfer speeds with CFQ IO scheduler in some ..., Vitaly V. Bursov, (Tue Nov 11, 3:42 pm)

Re: Slow file transfer speeds with CFQ IO scheduler in some ..., Jeff Moyer, (Tue Nov 11, 3:36 pm)

Re: Slow file transfer speeds with CFQ IO scheduler in some ..., Jeff Layton, (Tue Nov 11, 5:41 pm)

Re: Slow file transfer speeds with CFQ IO scheduler in some ..., Jeff Layton, (Tue Nov 11, 5:59 pm)

Re: Slow file transfer speeds with CFQ IO scheduler in some ..., Jens Axboe, (Wed Nov 12, 8:20 am)

Re: Slow file transfer speeds with CFQ IO scheduler in some ..., Jeff Layton, (Wed Nov 12, 8:45 am)

Re: Slow file transfer speeds with CFQ IO scheduler in some ..., Christoph Hellwig, (Wed Nov 12, 8:54 am)

Re: Slow file transfer speeds with CFQ IO scheduler in some ..., Jeff Moyer, (Tue Nov 11, 12:48 pm)

Re: Slow file transfer speeds with CFQ IO scheduler in some ..., Jens Axboe, (Tue Nov 11, 2:08 pm)

Re: Slow file transfer speeds with CFQ IO scheduler in some ..., Jens Axboe, (Mon Nov 10, 2:29 pm)

Re: Slow file transfer speeds with CFQ IO scheduler in some ..., Jens Axboe, (Mon Nov 10, 2:42 pm)

Re: Slow file transfer speeds with CFQ IO scheduler in some ..., Jeff Moyer, (Mon Nov 10, 2:39 pm)

Re: Slow file transfer speeds with CFQ IO scheduler in some ..., Alexey Dobriyan, (Sun Nov 9, 2:30 pm)

Re: Slow file transfer speeds with CFQ IO scheduler in some ..., Vitaly V. Bursov, (Sun Nov 9, 2:32 pm)

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