Re: I/O statistics per process

From: roland
Date: Wed Sep 27 2006 - 17:22:07 EST

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 "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 ?


----- Original Message ----- From: "Fengguang Wu" <fengguang.wu@xxxxxxxxx>
To: "roland" <devzero@xxxxxx>
Cc: <linux-kernel@xxxxxxxxxxxxxxx>
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( has developed an
iotop based on kprobes/systemtap. You can contact them if necessary.

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