Re: [PATCH 1/2] dm-kcopyd: introduce per-module throttle structure

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Subject: Re: [PATCH 1/2] dm-kcopyd: introduce per-module throttle structure
From: Alasdair G Kergon <agk@xxxxxxxxxx>
Date: Thu, 9 Jun 2011 17:27:27 +0100
Cc: device-mapper development <dm-devel@xxxxxxxxxx>, Joe Thornber <thornber@xxxxxxxxxx>
In-reply-to: <Pine.LNX.4.64.1106091136510.7642@xxxxxxxxxxxxxxxxxxxxxxxxxxx>
Mail-followup-to: Mikulas Patocka <mpatocka@xxxxxxxxxx>, Joe Thornber <thornber@xxxxxxxxxx>, device-mapper development <dm-devel@xxxxxxxxxx>
Organization: Red Hat UK Ltd. Registered in England and Wales, number 03798903. Registered Office: 64 Baker Street, 4th floor, London, W1U 7DF.
References: <Pine.LNX.4.64.1105311802330.9322@xxxxxxxxxxxxxxxxxxxxxxxxxxx> <20110601095106.GA3718@ubuntu> <Pine.LNX.4.64.1106021536240.31532@xxxxxxxxxxxxxxxxxxxxxxxxxxx> <20110603110111.GA4969@ubuntu> <Pine.LNX.4.64.1106071321300.8279@xxxxxxxxxxxxxxxxxxxxxxxxxxx> <20110609094746.GA3152@ubuntu> <Pine.LNX.4.64.1106091136510.7642@xxxxxxxxxxxxxxxxxxxxxxxxxxx>
Reply-to: device-mapper development <dm-devel@xxxxxxxxxx>
User-agent: Mutt/1.5.18 (2008-05-17)

On Thu, Jun 09, 2011 at 12:08:08PM -0400, Mikulas Patocka wrote:
> 8 sub jobs --- 76MB/s
> 2 sub jobs --- 74MB/s

Interesting data point: In your set up, the extra 6 sub jobs bring
little benefit.

Alasdair

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References:
- [PATCH 1/2] dm-kcopyd: introduce per-module throttle structure
  - From: Mikulas Patocka
- Re: [PATCH 1/2] dm-kcopyd: introduce per-module throttle structure
  - From: Joe Thornber
- Re: [PATCH 1/2] dm-kcopyd: introduce per-module throttle structure
  - From: Mikulas Patocka
- Re: [PATCH 1/2] dm-kcopyd: introduce per-module throttle structure
  - From: Joe Thornber
- Re: [PATCH 1/2] dm-kcopyd: introduce per-module throttle structure
  - From: Mikulas Patocka
- Re: [PATCH 1/2] dm-kcopyd: introduce per-module throttle structure
  - From: Joe Thornber
- Re: [PATCH 1/2] dm-kcopyd: introduce per-module throttle structure
  - From: Mikulas Patocka

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