Re: I/O statistics per process

["roland" <devzero@web.de>]

thanks. tried to contact redflag, but they don`t answer. maybe support is 
being on holiday.... !?

linux kernel hackers - there is really no standard way to watch i/o metrics 
(bytes read/written) at process level?

it`s extremly hard for the admin to track down, what process is hogging the 
disk - especially if there is more than one task consuming cpu.

meanwhile i found blktrace and read into the documenation. looks really cool 
and seems to be very powerful tool - but it it`s seems a little bit 
"oversized" and not the right tool for this. seems to be for 
tracing/debugging/analysis

what about http://lkml.org/lkml/2005/9/12/89  "with following patch, 
userspace processes/utilities will be able to access per process I/O 
statistics. for example, top like utilites can use this information" which 
has been posted to lkml one year ago ? any update on this ?

roland


----- Original Message ----- 
From: "Fengguang Wu" <fengguang.wu@gmail.com>
To: "roland" <devzero@web.de>
Cc: <linux-kernel@vger.kernel.org>
Sent: Sunday, September 24, 2006 5:04 AM
Subject: Re: I/O statistics per process


> On Fri, Sep 22, 2006 at 09:12:05PM +0200, roland wrote:
> > is there a modified top/ps with i/o column, or is there yet missing
> > something at the kernel level for getting that counters from ?
>
> Red Flag(http://www.redflag-linux.com/eindex.html) has developed an
> iotop based on kprobes/systemtap. You can contact them if necessary. 

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