linux-arm-kernel.lists.infradead.org archive mirror
 help / color / mirror / Atom feed
From: shawnguo@kernel.org (Shawn Guo)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH 1/1 v8] ARM: imx: Added perf functionality to mmdc driver
Date: Sun, 23 Oct 2016 20:41:50 +0800	[thread overview]
Message-ID: <20161023124149.GS30578@tiger> (raw)
In-Reply-To: <1474307849-7341-1-git-send-email-Frank.Li@nxp.com>

On Mon, Sep 19, 2016 at 12:57:29PM -0500, Frank Li wrote:
> From: Zhengyu Shen <zhengyu.shen@nxp.com>
> 
> MMDC is a multi-mode DDR controller that supports DDR3/DDR3L x16/x32/x64
> and LPDDR2 two channel x16/x32 memory types. MMDC is configurable, high
> performance, and optimized. MMDC is present on i.MX6 Quad and i.MX6
> QuadPlus devices, but this driver only supports i.MX6 Quad at the moment.
> MMDC provides registers for performance counters which read via this
> driver to help debug memory throughput and similar issues.
> 
> $ perf stat -a -e mmdc/busy-cycles/,mmdc/read-accesses/,mmdc/read-bytes/,mmdc/total-cycles/,mmdc/write-accesses/,mmdc/write-bytes/ dd if=/dev/zero of=/dev/null bs=1M count=5000
> Performance counter stats for 'dd if=/dev/zero of=/dev/null bs=1M count=5000':
> 
>          898021787      mmdc/busy-cycles/
>           14819600      mmdc/read-accesses/
>             471.30 MB   mmdc/read-bytes/
>         2815419216      mmdc/total-cycles/
>           13367354      mmdc/write-accesses/
>             427.76 MB   mmdc/write-bytes/
> 
>        5.334757334 seconds time elapsed
> 
> Signed-off-by: Zhengyu Shen <zhengyu.shen@nxp.com>
> Signed-off-by: Frank Li <frank.li@nxp.com>

Applied, thanks.

      parent reply	other threads:[~2016-10-23 12:41 UTC|newest]

Thread overview: 5+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2016-09-19 17:57 [PATCH 1/1 v8] ARM: imx: Added perf functionality to mmdc driver Frank Li
2016-09-26 16:40 ` Zhi Li
2016-10-10 20:17   ` Zhi Li
2016-10-13 12:49     ` Shawn Guo
2016-10-23 12:41 ` Shawn Guo [this message]

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=20161023124149.GS30578@tiger \
    --to=shawnguo@kernel.org \
    --cc=linux-arm-kernel@lists.infradead.org \
    /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 a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).