From: Arnd Bergmann <arnd@arndb.de>
To: Chris Metcalf <cmetcalf@tilera.com>
Cc: virtualization@lists.linux-foundation.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH] arch/tile: add /proc/tile, /proc/sys/tile, and a sysfs cpu attribute
Date: Fri, 20 May 2011 17:13:25 +0200 [thread overview]
Message-ID: <201105201713.25364.arnd@arndb.de> (raw)
In-Reply-To: <4DD6821F.6060707@tilera.com>
On Friday 20 May 2011 17:00:47 Chris Metcalf wrote:
> > Any chance you can still restructure the information? I would recommend
> > making it a first-class procfs member, since the data is really per-task.
> >
> > You can add a conditional entry to tgid_base_stuff[] in fs/proc/base.c
> > to make it show up for each pid, and then just have the per-task information
> > in there to do the lookup the other way round:
> >
> > # cat /proc/484/hardwall
> > 2x2 1,1 @2,1
> >
> > # cat /proc/479/hardwall
> > 2x2 1,1 @1,1
>
> It's not unreasonable to do what you're suggesting, i.e. "what's this
> task's hardwall?", but it's not something that we've come up with any kind
> of use case for in the past, so I'm not currently planning to implement
> this. If we did, I agree, your solution looks like the right one.
It's fairly easy to aggregate in user space though, we do similar
things for 'lsof' and 'top', which walk all of procfs in order
to show the complete picture. This is obviously more overhead than
walking the lists in the kernel, but still not an expensive
operation, and it keeps the data format much simpler.
Arnd
next prev parent reply other threads:[~2011-05-20 15:13 UTC|newest]
Thread overview: 110+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-05-20 5:43 [PATCH] arch/tile: new multi-core architecture for Linux Chris Metcalf
2010-05-20 8:04 ` Barry Song
2010-05-20 14:32 ` Linus Torvalds
2010-05-20 19:10 ` Chris Metcalf
2010-05-21 4:52 ` Barry Song
2010-05-21 15:13 ` Chris Metcalf
2010-05-20 19:12 ` [PATCH] generic: make lowmem_page_address() use PFN_PHYS() for improved portability Chris Metcalf
2010-05-22 4:05 ` [PATCH] arch/tile: new multi-core architecture for Linux Chris Metcalf
2010-05-23 22:08 ` Arnd Bergmann
2010-05-24 15:29 ` Chris Metcalf
2010-05-24 18:53 ` Arnd Bergmann
2010-05-24 21:29 ` Chris Metcalf
2010-05-25 13:54 ` Chris Metcalf
2010-05-25 15:03 ` Arnd Bergmann
2010-05-25 15:13 ` Chris Metcalf
2010-05-25 15:30 ` Arnd Bergmann
2010-05-26 2:44 ` liqin.chen
2010-05-26 2:44 ` liqin.chen
2010-05-26 13:45 ` Chris Metcalf
[not found] ` <4BFBE005.2070500@tilera.com>
[not found] ` <201005251721.23782.arnd@arndb.de>
2010-05-26 23:05 ` Chris Metcalf
2010-05-26 5:02 ` Paul Mundt
2010-05-25 21:45 ` Arnd Bergmann
2010-05-27 0:58 ` Chris Metcalf
2010-05-27 8:41 ` Arnd Bergmann
2010-05-27 13:30 ` Chris Metcalf
2010-05-27 13:41 ` Geert Uytterhoeven
2010-05-27 13:48 ` Paul Mundt
2010-05-27 14:11 ` Arnd Bergmann
2010-05-27 14:35 ` Chris Metcalf
2010-05-27 15:02 ` Arnd Bergmann
2010-05-27 15:04 ` Chris Metcalf
2010-05-27 15:20 ` Arnd Bergmann
2010-05-27 14:52 ` Marc Gauthier
2010-05-28 17:58 ` Chris Metcalf
2010-05-27 15:03 ` Chris Metcalf
2010-05-27 20:34 ` Jamie Lokier
2010-05-27 20:53 ` Arnd Bergmann
2010-05-28 16:45 ` Chris Metcalf
2010-05-28 17:16 ` Arnd Bergmann
2010-05-28 17:28 ` Chris Metcalf
2011-05-16 18:23 ` [PATCH] arch/tile: support signal "exception-trace" hook Chris Metcalf
2011-05-18 18:14 ` Chris Metcalf
2011-05-17 20:26 ` [PATCH] arch/tile: add /proc/tile, /proc/sys/tile, and a sysfs cpu attribute Chris Metcalf
2011-05-19 13:41 ` Arnd Bergmann
2011-05-19 15:12 ` Chris Metcalf
2011-05-19 15:22 ` Arnd Bergmann
2011-05-19 15:22 ` Arnd Bergmann
2011-05-20 14:26 ` Chris Metcalf
2011-05-20 14:26 ` Chris Metcalf
2011-05-20 14:37 ` Arnd Bergmann
2011-05-20 15:00 ` Chris Metcalf
2011-05-20 15:00 ` Chris Metcalf
2011-05-20 15:13 ` Arnd Bergmann [this message]
2011-05-20 19:59 ` Arnd Bergmann
2011-05-20 19:59 ` Arnd Bergmann
2011-05-25 19:09 ` Chris Metcalf
2011-05-25 19:17 ` Chris Metcalf
2011-05-25 19:18 ` Chris Metcalf
2011-05-25 20:20 ` Arnd Bergmann
2011-05-25 20:20 ` Arnd Bergmann
2011-05-25 20:31 ` Chris Metcalf
2011-05-25 20:34 ` Arnd Bergmann
2011-05-25 20:34 ` Arnd Bergmann
2011-05-25 20:31 ` Chris Metcalf
2011-05-26 16:40 ` [PATCH v2] arch/tile: more /proc and /sys file support Chris Metcalf
2011-05-27 14:23 ` Arnd Bergmann
2011-05-27 14:23 ` Arnd Bergmann
2011-05-26 16:40 ` Chris Metcalf
2011-05-25 19:18 ` [PATCH] arch/tile: add /proc/tile, /proc/sys/tile, and a sysfs cpu attribute Chris Metcalf
2011-05-20 15:13 ` Arnd Bergmann
2011-05-20 14:37 ` Arnd Bergmann
2011-05-24 15:38 ` Arnd Bergmann
2011-05-24 15:38 ` Arnd Bergmann
2010-05-24 20:22 ` [PATCH] arch/tile: new multi-core architecture for Linux Sam Ravnborg
2010-05-24 21:30 ` Chris Metcalf
2010-05-25 5:02 ` Sam Ravnborg
2010-05-25 20:12 ` Thomas Gleixner
2010-05-26 1:57 ` Chris Metcalf
2010-05-26 16:22 ` Chris Metcalf
2010-05-26 17:09 ` Arnd Bergmann
2010-05-29 3:01 ` [PATCH 1/8] Fix up the "generic" unistd.h ABI to be more useful Chris Metcalf
2010-05-29 3:01 ` Chris Metcalf
2010-05-29 3:09 ` [PATCH 2/8] arch/tile: infrastructure and configuration-related files Chris Metcalf
2010-05-31 7:47 ` Paul Mundt
2010-06-03 17:54 ` Chris Metcalf
2010-05-29 3:09 ` Chris Metcalf
2010-05-29 3:10 ` [PATCH 3/8] arch/tile: header files for the Tile architecture Chris Metcalf
2010-05-31 2:58 ` FUJITA Tomonori
2010-06-03 21:32 ` [PATCH] arch/tile: respond to reviews of the second code submission Chris Metcalf
2010-06-04 0:50 ` Paul Mundt
2010-06-04 1:31 ` FUJITA Tomonori
2010-06-07 5:25 ` FUJITA Tomonori
2010-05-29 3:10 ` [PATCH 4/8] arch/tile: core kernel/ code Chris Metcalf
2010-05-31 2:58 ` FUJITA Tomonori
2010-05-29 3:11 ` [PATCH 5/8] arch/tile: the kernel/tile-desc_32.c file Chris Metcalf
2010-05-29 3:13 ` [PATCH 6/8] arch/tile: the mm/ directory Chris Metcalf
2010-05-29 3:16 ` [PATCH 7/8] arch/tile: lib/ directory Chris Metcalf
2010-05-29 3:16 ` Chris Metcalf
2010-05-29 3:17 ` [PATCH 8/8] arch/tile: hypervisor console driver Chris Metcalf
2010-05-29 3:17 ` Chris Metcalf
[not found] ` <dVZMmBu$KHA.5388@exchange1.tad.internal.tilera.com>
2010-05-29 3:20 ` [PATCH 0/8] revised patch for arch/tile/ support Chris Metcalf
2010-05-29 3:20 ` Chris Metcalf
2010-05-29 11:29 ` Arnd Bergmann
2010-06-03 20:40 ` Arnd Bergmann
2010-06-03 21:48 ` Chris Metcalf
2010-06-04 21:32 ` Chris Metcalf
2010-06-05 12:56 ` Stephen Rothwell
2010-06-05 13:30 ` Chris Metcalf
2010-06-05 14:10 ` Stephen Rothwell
2010-05-29 3:20 ` Chris Metcalf
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