linux-kernel - Re: seq_put_decimal

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Message-ID: <4F667DF1.3090109@jp.fujitsu.com>
Date:	Mon, 19 Mar 2012 09:29:37 +0900
From:	KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>
To:	Alexey Dobriyan <adobriyan@...il.com>
CC:	Andrew Morton <akpm@...ux-foundation.org>,
	Linux Kernel <linux-kernel@...r.kernel.org>,
	Eric Dumazet <eric.dumazet@...il.com>
Subject: Re: seq_put_decimal_ull() et al

(2012/03/16 20:16), Alexey Dobriyan wrote:

> On Wed, Mar 14, 2012 at 5:08 AM, KAMEZAWA Hiroyuki
> <kamezawa.hiroyu@...fujitsu.com> wrote:
>> On Wed, 14 Mar 2012 09:31:56 +0900
>> KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com> wrote:
>>
>>> On Tue, 13 Mar 2012 15:35:54 +0200
>>> Alexey Dobriyan <adobriyan@...il.com> wrote:
>>>
>>>>> Subject:    + procfs-add-num_to_str-to-speed-up-proc-stat-fix-2.patch added to -mm tree
>>>>
>>>> I think the fix is to create proper binary interface for exporting
>>>> interrupt counts.
>>>> Programs can parse raw data equally well if programming language is
>>>> even minimally reasonable
>>>> (POSIX shell may not qualify, though).
>>>
>>> Ok, please try with all tool-chain updates.
>>> procps, top, sar, and more ?
>>>
> 
> Well, why not?
> We can tune print code or we can create maximally fast interface and forget.
> 

Do you have an idea where to place it ? 
/proc/stat_binary ?
/proc/binary/stat ?

Hm, to parse /proc/stat binary format, the user has to know the format of the
kernel version.

Do we show a format file as
/proc/binary/stat_format and show
# cat /proc/binary/stat_format
  =IHHHIHIQQQIHQQ...

as python's pack/unpack ? or
export the format via /usr/include/linux/proc_format.h ? as a structure ?

any better idea ?

Thanks,
-Kame







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