From: Tejun Heo <tj@kernel.org>
To: Kemeng Shi <shikemeng@huawei.com>
Cc: axboe@kernel.dk, linux-block@vger.kernel.org,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH 3/8] blk-iocost: Trace vtime_base_rate instead of vtime_rate
Date: Mon, 17 Oct 2022 09:03:33 -1000 [thread overview]
Message-ID: <Y02nBcwomc+9xZ+l@slm.duckdns.org> (raw)
In-Reply-To: <20221017020011.25016-4-shikemeng@huawei.com>
On Mon, Oct 17, 2022 at 10:00:06AM +0800, Kemeng Shi wrote:
> Since commit ac33e91e2daca ("blk-iocost: implement vtime loss
> compensation") rename original vtime_base to vtime_base_rate
> and current vtime_base is original vtime_base with compensation.
^
vtime_rate
There are multiple places with the same mistake. Can you please fix the
patch description?
> The current rate showed in tracepoint is mixed with vtime_base
> and vtime_base_rate:
> 1) In function ioc_adjust_base_vrate, the first trace_iocost_ioc_vrate_adj
> shows vtime_base, the second trace_iocost_ioc_vrate_adj shows
> vtime_base_rate.
> 2) In function iocg_activate shows vtime_base by calling
> TRACE_IOCG_PATH(iocg_activate...
> 3) In function ioc_check_iocgs shows vtime_base by calling
> TRACE_IOCG_PATH(iocg_idle...
>
> Trace vtime_base_rate instead of vtime_rate as:
> 1) Before commit ac33e91e2daca ("blk-iocost: implement vtime loss
> compensation"), the traced rate is without compensation, so still
> show rate without compensation.
> 2) The vtime_base_rate is more stable while vtime_rate heavily depends on
> excess budeget on current period which may change abruptly in next period.
>
> Signed-off-by: Kemeng Shi <shikemeng@huawei.com>
Other than that,
Acked-by: Tejun Heo <tj@kernel.org>
Thanks.
--
tejun
next prev parent reply other threads:[~2022-10-17 19:03 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-10-17 2:00 [PATCH 0/8] A few cleanup and bugfix patches for blk-iocost Kemeng Shi
2022-10-17 2:00 ` [PATCH 1/8] blk-iocost: Fix typo in comment Kemeng Shi
2022-10-17 18:52 ` Tejun Heo
2022-10-17 2:00 ` [PATCH 2/8] blk-iocost: Reset vtime_base_rate in ioc_refresh_params Kemeng Shi
2022-10-17 18:59 ` Tejun Heo
2022-10-17 2:00 ` [PATCH 3/8] blk-iocost: Trace vtime_base_rate instead of vtime_rate Kemeng Shi
2022-10-17 19:03 ` Tejun Heo [this message]
2022-10-17 2:00 ` [PATCH 4/8] blk-iocost: Remove vrate member in struct ioc_now Kemeng Shi
2022-10-17 19:08 ` Tejun Heo
2022-10-17 2:00 ` [PATCH 5/8] blk-iocost: Correct comment in blk_iocost_init Kemeng Shi
2022-10-17 19:10 ` Tejun Heo
2022-10-17 2:00 ` [PATCH 6/8] blk-iocost: Avoid to call current_hweight_max if iocg->inuse == iocg->active Kemeng Shi
2022-10-17 19:15 ` Tejun Heo
2022-10-17 2:00 ` [PATCH 7/8] blk-iocost: Remove redundant initialization of struct ioc_gq Kemeng Shi
2022-10-17 19:16 ` Tejun Heo
2022-10-17 2:00 ` [PATCH 8/8] blk-iocost: Get ioc_now inside weight_updated Kemeng Shi
2022-10-17 19:19 ` Tejun Heo
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=Y02nBcwomc+9xZ+l@slm.duckdns.org \
--to=tj@kernel.org \
--cc=axboe@kernel.dk \
--cc=linux-block@vger.kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=shikemeng@huawei.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 a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox
all inboxes | Powered by JetHome®