From: Konstantin Dorfman <kdorfman@codeaurora.org>
To: "Bruce Ford (bford)" <bford@micron.com>
Cc: "linux-mmc@vger.kernel.org" <linux-mmc@vger.kernel.org>
Subject: Re: MMC Driver Throughput
Date: Thu, 31 Jan 2013 15:36:45 +0200 [thread overview]
Message-ID: <510A736D.3090600@codeaurora.org> (raw)
In-Reply-To: <DB9374B0B2CB664D9425A1916C7DE85A36804AA8@NTXBOIMBX06.micron.com>
Hello Bruce,
On 1/30/2013 8:35 PM, Bruce Ford (bford) wrote:
> Question:
>
> Has any testing been done to determine the maximum data throughput to/from
> a MMC device; assuming the MMC device takes zero time to complete tasks?
>
> Put another way - at what level of IOPS does the kernel/driver become the
> bottleneck, instead of the storage device?
This should depend on specific host controller, hardware and driver.
You can look from another end:
kernel/driver overhead = "Row max TPT of of the MMC device" -
"lmdd/iozone/tiotest max TPT"
Where the row tpt can be found from card vendor data.
--
Konstantin Dorfman,
QUALCOMM ISRAEL, on behalf of Qualcomm Innovation Center,
Inc. is a member of Code Aurora Forum,
hosted by The Linux Foundation
prev parent reply other threads:[~2013-01-31 13:36 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-01-30 18:35 MMC Driver Throughput Bruce Ford (bford)
2013-01-31 13:36 ` Konstantin Dorfman [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=510A736D.3090600@codeaurora.org \
--to=kdorfman@codeaurora.org \
--cc=bford@micron.com \
--cc=linux-mmc@vger.kernel.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).