From: Eric Nelson <eric@nelint.com>
To: u-boot@lists.denx.de
Subject: [U-Boot] [RFC PATCH 2/2] mmc: add support for block device cache
Date: Mon, 21 Mar 2016 07:27:34 -0700 [thread overview]
Message-ID: <56F004D6.6010003@nelint.com> (raw)
In-Reply-To: <56EEFB99.2080805@nelint.com>
Hi Stephen,
On 03/20/2016 12:35 PM, Eric Nelson wrote:
> On 03/17/2016 02:23 PM, Stephen Warren wrote:
>> On 03/16/2016 03:40 PM, Eric Nelson wrote:
...
>> Do you have any stats on how many operations this saves for typical FS
>> operations such as:
>>
>> - Partition table type identification (with various types such as
>> MBR/DOS, GPT, ...)
>> - Partition enumeration
>> - Filesystem identification (with various filesystems such as FAT, ext,
>> ...)
>> - File reads
>>
>
> Not yet, but I'm working something up that will allow this to be
> gathered easily. As soon as we implement a cache, it provides a nice
> spot for tracing operations.
>
The V2 RFC patch set implements a command (blkcache) that allows
tracing block read operations as they pass through the cache, among
other things:
=> blkcache trace
=> load mmc 0 10008000 /zImage
miss: start 0, count 1
fill: start 0, count 1
miss: start 2000, count 1
fill: start 2000, count 1
reading /zImage
hit: start 2000, count 1
miss: start 2011, count 2
miss: start 2001, count 6
miss: start 2031, count 9678
miss: start 45ff, count 1
fill: start 45ff, count 1
4955304 bytes read in 258 ms (18.3 MiB/s)
http://lists.denx.de/pipermail/u-boot/2016-March/249155.html
https://patchwork.ozlabs.org/patch/599942/
next prev parent reply other threads:[~2016-03-21 14:27 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-03-16 18:42 [U-Boot] ext4 and caching Eric Nelson
2016-03-16 21:40 ` [U-Boot] [RFC PATCH 0/2] simple cache layer for block devices Eric Nelson
2016-03-16 21:40 ` [U-Boot] [RFC PATCH 1/2] add block device cache Eric Nelson
2016-03-17 21:16 ` Stephen Warren
2016-03-17 21:33 ` Eric Nelson
2016-03-17 21:41 ` Stephen Warren
2016-03-20 22:13 ` Tom Rini
2016-03-20 22:51 ` Eric Nelson
2016-03-16 21:40 ` [U-Boot] [RFC PATCH 2/2] mmc: add support for " Eric Nelson
2016-03-17 21:23 ` Stephen Warren
2016-03-20 19:35 ` Eric Nelson
2016-03-20 22:13 ` Tom Rini
2016-03-20 22:54 ` Eric Nelson
2016-03-21 18:31 ` Eric Nelson
2016-03-26 0:11 ` Eric Nelson
2016-04-09 17:55 ` Simon Glass
2016-04-10 14:31 ` Eric Nelson
2016-03-21 14:27 ` Eric Nelson [this message]
2016-03-19 15:42 ` [U-Boot] ext4 and caching Ioan Nicu
2016-03-20 15:02 ` Eric Nelson
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=56F004D6.6010003@nelint.com \
--to=eric@nelint.com \
--cc=u-boot@lists.denx.de \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.