From: Weiping Zhang <zwp10758@gmail.com> To: Christoph Hellwig <hch@infradead.org> Cc: Jens Axboe <axboe@kernel.dk>, Tejun Heo <tj@kernel.org>, linux-block@vger.kernel.org, cgroups@vger.kernel.org Subject: Re: [RFC PATCH v2 2/3] bio: track timestamp of submitting bio the disk driver Date: Tue, 31 Mar 2020 16:45:33 +0800 [thread overview] Message-ID: <CAA70yB5cWESKW600Lwoi8toPaiDtOVH53P8GSou6uukmX5mvgQ@mail.gmail.com> (raw) In-Reply-To: <20200331082505.GA14655@infradead.org> Christoph Hellwig <hch@infradead.org> 于2020年3月31日周二 下午4:25写道: > > On Fri, Mar 27, 2020 at 02:28:59PM +0800, Weiping Zhang wrote: > > Change-Id: Ibb9caf20616f83e111113ab5c824c05930c0e523 > > Signed-off-by: Weiping Zhang <zhangweiping@didiglobal.com> > > This needs a commit description and loose the weird change id. > OK, I rewirte commit description, it record the timestamp of issue bio to the disk driver, then we can get the delta time in rq_qos_done_bio. It's same as the D2C time of blktrace. > I also think oyu need to fins a way to not bloat the bio even more, > cgroup is a really bad offender for bio size. struct request { u64 io_start_time_ns; also record this timestamp, I'll check if we can use it. Thanks a lot
WARNING: multiple messages have this Message-ID (diff)
From: Weiping Zhang <zwp10758-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> To: Christoph Hellwig <hch-wEGCiKHe2LqWVfeAwA7xHQ@public.gmane.org> Cc: Jens Axboe <axboe-tSWWG44O7X1aa/9Udqfwiw@public.gmane.org>, Tejun Heo <tj-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>, linux-block-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, cgroups-u79uwXL29TY76Z2rM5mHXA@public.gmane.org Subject: Re: [RFC PATCH v2 2/3] bio: track timestamp of submitting bio the disk driver Date: Tue, 31 Mar 2020 16:45:33 +0800 [thread overview] Message-ID: <CAA70yB5cWESKW600Lwoi8toPaiDtOVH53P8GSou6uukmX5mvgQ@mail.gmail.com> (raw) In-Reply-To: <20200331082505.GA14655-wEGCiKHe2LqWVfeAwA7xHQ@public.gmane.org> Christoph Hellwig <hch-wEGCiKHe2LqWVfeAwA7xHQ@public.gmane.org> 于2020年3月31日周二 下午4:25写道: > > On Fri, Mar 27, 2020 at 02:28:59PM +0800, Weiping Zhang wrote: > > Change-Id: Ibb9caf20616f83e111113ab5c824c05930c0e523 > > Signed-off-by: Weiping Zhang <zhangweiping-+mmu7dyatJ+Rq8AjE7tl8g@public.gmane.org> > > This needs a commit description and loose the weird change id. > OK, I rewirte commit description, it record the timestamp of issue bio to the disk driver, then we can get the delta time in rq_qos_done_bio. It's same as the D2C time of blktrace. > I also think oyu need to fins a way to not bloat the bio even more, > cgroup is a really bad offender for bio size. struct request { u64 io_start_time_ns; also record this timestamp, I'll check if we can use it. Thanks a lot
next prev parent reply other threads:[~2020-03-31 8:45 UTC|newest] Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top 2020-03-27 6:28 [RFC PATCH v2 2/3] bio: track timestamp of submitting bio the disk driver Weiping Zhang 2020-03-27 6:28 ` Weiping Zhang 2020-03-31 8:25 ` Christoph Hellwig 2020-03-31 8:25 ` Christoph Hellwig 2020-03-31 8:45 ` Weiping Zhang [this message] 2020-03-31 8:45 ` Weiping Zhang 2020-03-31 9:16 ` Christoph Hellwig 2020-03-31 10:56 ` Weiping Zhang 2020-03-31 10:56 ` Weiping Zhang
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