From: Tejun Heo <tj@kernel.org>
To: Paolo Valente <paolo.valente@linaro.org>
Cc: Jens Axboe <axboe@kernel.dk>,
newella@fb.com, clm@fb.com, Josef Bacik <josef@toxicpanda.com>,
dennisz@fb.com, Li Zefan <lizefan@huawei.com>,
Johannes Weiner <hannes@cmpxchg.org>,
linux-kernel <linux-kernel@vger.kernel.org>,
linux-block <linux-block@vger.kernel.org>,
kernel-team@fb.com, cgroups@vger.kernel.org, ast@kernel.org,
daniel@iogearbox.net, kafai@fb.com, songliubraving@fb.com,
yhs@fb.com, bpf@vger.kernel.org
Subject: Re: [PATCHSET block/for-next] IO cost model based work-conserving porportional controller
Date: Mon, 2 Sep 2019 08:56:52 -0700 [thread overview]
Message-ID: <20190902155652.GH2263813@devbig004.ftw2.facebook.com> (raw)
In-Reply-To: <88C7DC68-680E-49BB-9699-509B9B0B12A0@linaro.org>
On Mon, Sep 02, 2019 at 05:45:50PM +0200, Paolo Valente wrote:
> Thanks for this extra explanations. It is a little bit difficult for
> me to understand how the min/max teaks for exactly, but you did give
> me the general idea.
It just limits how far high and low the IO issue rate, measured in
cost, can go. ie. if max is at 200%, the controller won't issue more
than twice of what the cost model says 100% is.
> Are these results in line with your expectations? If they are, then
> I'd like to extend benchmarks to more mixes of workloads. Or should I
> try some other QoS configuration first?
They aren't. Can you please include the content of io.cost.qos and
io.cost.model before each run? Note that partial writes to subset of
parameters don't clear other parameters.
Thanks.
--
tejun
next prev parent reply other threads:[~2019-09-02 15:56 UTC|newest]
Thread overview: 34+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-06-14 1:56 [PATCHSET block/for-next] IO cost model based work-conserving porportional controller Tejun Heo
2019-06-14 1:56 ` [PATCH 01/10] blkcg: pass @q and @blkcg into blkcg_pol_alloc_pd_fn() Tejun Heo
2019-06-14 1:56 ` [PATCH 02/10] blkcg: make ->cpd_init_fn() optional Tejun Heo
2019-06-14 1:56 ` [PATCH 03/10] blkcg: separate blkcg_conf_get_disk() out of blkg_conf_prep() Tejun Heo
2019-06-14 1:56 ` [PATCH 04/10] block/rq_qos: add rq_qos_merge() Tejun Heo
2019-06-14 1:56 ` [PATCH 05/10] block/rq_qos: implement rq_qos_ops->queue_depth_changed() Tejun Heo
2019-06-14 1:56 ` [PATCH 06/10] blkcg: s/RQ_QOS_CGROUP/RQ_QOS_LATENCY/ Tejun Heo
2019-06-14 1:56 ` [PATCH 07/10] blk-mq: add optional request->pre_start_time_ns Tejun Heo
2019-06-14 1:56 ` [PATCH 08/10] blkcg: implement blk-ioweight Tejun Heo
2019-06-14 12:17 ` Toke Høiland-Jørgensen
2019-06-14 15:09 ` Tejun Heo
2019-06-14 20:50 ` Toke Høiland-Jørgensen
2019-06-15 15:57 ` Tejun Heo
2019-06-14 1:56 ` [PATCH 09/10] blkcg: add tools/cgroup/monitor_ioweight.py Tejun Heo
2019-06-14 1:56 ` [PATCH 10/10] blkcg: implement BPF_PROG_TYPE_IO_COST Tejun Heo
2019-06-14 11:32 ` Quentin Monnet
2019-06-14 14:52 ` Tejun Heo
2019-06-14 16:35 ` Alexei Starovoitov
2019-06-14 17:09 ` Tejun Heo
2019-06-14 17:56 ` [PATCHSET block/for-next] IO cost model based work-conserving porportional controller Tejun Heo
2019-08-20 10:48 ` Paolo Valente
2019-08-20 15:04 ` Paolo Valente
2019-08-20 15:19 ` Tejun Heo
2019-08-22 8:58 ` Paolo Valente
2019-08-31 6:53 ` Tejun Heo
2019-08-31 7:10 ` Paolo Valente
2019-08-31 11:20 ` Tejun Heo
2019-09-02 15:45 ` Paolo Valente
2019-09-02 15:56 ` Tejun Heo [this message]
2019-09-02 19:43 ` Paolo Valente
2019-09-05 16:55 ` Tejun Heo
2019-09-06 9:07 ` Paolo Valente
2019-09-06 14:58 ` Tejun Heo
2020-02-19 18:34 ` Paolo Valente
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=20190902155652.GH2263813@devbig004.ftw2.facebook.com \
--to=tj@kernel.org \
--cc=ast@kernel.org \
--cc=axboe@kernel.dk \
--cc=bpf@vger.kernel.org \
--cc=cgroups@vger.kernel.org \
--cc=clm@fb.com \
--cc=daniel@iogearbox.net \
--cc=dennisz@fb.com \
--cc=hannes@cmpxchg.org \
--cc=josef@toxicpanda.com \
--cc=kafai@fb.com \
--cc=kernel-team@fb.com \
--cc=linux-block@vger.kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=lizefan@huawei.com \
--cc=newella@fb.com \
--cc=paolo.valente@linaro.org \
--cc=songliubraving@fb.com \
--cc=yhs@fb.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;
as well as URLs for NNTP newsgroup(s).