From: keith.busch@intel.com (Keith Busch)
Subject: Question on IOStat accounting
Date: Wed, 17 Sep 2014 08:28:07 -0600 (MDT) [thread overview]
Message-ID: <alpine.LRH.2.03.1409170820490.4696@AMR> (raw)
In-Reply-To: <067e01cfd273$76dbc4e0$64934ea0$@samsung.com>
On Wed, 17 Sep 2014, Indraneel Mukherjee wrote:
> In the current implementation of IO accounting in the nvme driver,
> accounting is started once IOD is successfully prepared.
> Thereafter 2 cases can happen, either IO gets successfully submitted to
> device or it can get queued up in the IOD list if there is a failure.
>
> So what's the definition of iostat here? In-flight in the device or
> in-flight in the driver ? Is there a need to make this consistent?
It seems consistent with other block drivers. Usually stats are handled
above the device driver at the request layer, but bio-based drivers
handle the stats on their own.
next prev parent reply other threads:[~2014-09-17 14:28 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-09-17 12:32 Question on IOStat accounting Indraneel Mukherjee
2014-09-17 14:28 ` Keith Busch [this message]
2014-09-23 7:40 ` Indraneel Mukherjee
2014-09-23 15:31 ` Keith Busch
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=alpine.LRH.2.03.1409170820490.4696@AMR \
--to=keith.busch@intel.com \
/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.