public inbox for linux-arm-kernel@lists.infradead.org 
 help / color / mirror / Atom feed

From: cyril@ti•com (Cyril Chemparathy)
To: linux-arm-kernel@lists•infradead.org
Subject: [PATCH v4 00/13] ARM LPAE Fixes - Part 1
Date: Fri, 1 Feb 2013 11:13:48 -0500	[thread overview]
Message-ID: <510BE9BC.9090701@ti.com> (raw)
In-Reply-To: <20130201151410.GR23505@n2100.arm.linux.org.uk>

On 02/01/2013 10:14 AM, Russell King - ARM Linux wrote:
> On Fri, Feb 01, 2013 at 10:10:37AM -0500, Cyril Chemparathy wrote:
>> With this, I ran simple network and filesystem performance tests to
>> compare the code-patching vs. non-code-patching variants.  These tests
>> didn't yield any significant performance difference between the two on
>> an ARMv7 (Cortex-A8) platform.
>
> It's not network and fs activity that this kind of stuff is likely to
> show up in, but more to do with walking pages tables and the like -
> remember that page tables are stored using physical addresses, and any
> walks of them have to convert those physical addresses to virtual
> addresses and back again.
>
> So, things like page scanning for eviction (eg, page aging, page
> faults even those which just re-use a page from the page cache) have
> to use the v:p / p:v translation macros.
>

Thanks, Russell.  Any recommendations on how to best benchmark this?

Thanks
-- Cyril.

next prev parent reply	other threads:[~2013-02-01 16:13 UTC|newest]

Thread overview: 30+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2013-01-31 21:58 [PATCH v4 00/13] ARM LPAE Fixes - Part 1 Cyril Chemparathy
2013-01-31 21:58 ` [PATCH v4 01/13] ARM: LPAE: use signed arithmetic for mask definitions Cyril Chemparathy
2013-01-31 21:58 ` [PATCH v4 02/13] ARM: LPAE: use phys_addr_t in alloc_init_pud() Cyril Chemparathy
2013-02-01  3:11   ` Hui Wang
2013-02-01  3:35     ` Nicolas Pitre
2013-02-01  5:40       ` Hui Wang
2013-02-01 17:33       ` Subash Patel
2013-02-01 17:56         ` Cyril Chemparathy
2013-02-01 18:14         ` Nicolas Pitre
2013-02-01 20:32           ` Subash Patel
2013-01-31 21:58 ` [PATCH v4 03/13] ARM: LPAE: use phys_addr_t in free_memmap() Cyril Chemparathy
2013-01-31 21:58 ` [PATCH v4 04/13] ARM: LPAE: use phys_addr_t for initrd location Cyril Chemparathy
2013-01-31 21:58 ` [PATCH v4 05/13] ARM: LPAE: use phys_addr_t in switch_mm() Cyril Chemparathy
2013-01-31 21:58 ` [PATCH v4 06/13] ARM: LPAE: use 64-bit accessors for TTBR registers Cyril Chemparathy
2013-01-31 21:58 ` [PATCH v4 07/13] ARM: LPAE: define ARCH_LOW_ADDRESS_LIMIT for bootmem Cyril Chemparathy
2013-02-01  3:42   ` Nicolas Pitre
2013-01-31 21:58 ` [PATCH v4 08/13] ARM: LPAE: factor out T1SZ and TTBR1 computations Cyril Chemparathy
2013-01-31 21:58 ` [PATCH v4 09/13] ARM: LPAE: accomodate >32-bit addresses for page table base Cyril Chemparathy
2013-02-01  3:48   ` Nicolas Pitre
2013-01-31 21:58 ` [PATCH v4 10/13] ARM: mm: use physical addresses in highmem sanity checks Cyril Chemparathy
2013-01-31 21:58 ` [PATCH v4 11/13] ARM: mm: cleanup checks for membank overlap with vmalloc area Cyril Chemparathy
2013-01-31 21:58 ` [PATCH v4 12/13] ARM: mm: clean up membank size limit checks Cyril Chemparathy
2013-01-31 21:58 ` [PATCH v4 13/13] ARM: fix type of PHYS_PFN_OFFSET to unsigned long Cyril Chemparathy
2013-02-01  3:51   ` Nicolas Pitre
2013-02-01  4:00 ` [PATCH v4 00/13] ARM LPAE Fixes - Part 1 Nicolas Pitre
2013-02-01 15:10   ` Cyril Chemparathy
2013-02-01 15:14     ` Russell King - ARM Linux
2013-02-01 16:13       ` Cyril Chemparathy [this message]
2013-02-01 17:56         ` Nicolas Pitre
2013-02-01 20:21 ` Subash Patel

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=510BE9BC.9090701@ti.com \
    --to=cyril@ti$(echo .)com \
    --cc=linux-arm-kernel@lists$(echo .)infradead.org \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox