From: weiping zhang <zhangweiping@didichuxing.com>
To: Jens Axboe <axboe@kernel.dk>
Cc: <linux-block@vger.kernel.org>
Subject: Re: [PATCH] blk-mq-debugfs: add mapping show for hw queue to cpu
Date: Thu, 13 Jul 2017 01:13:31 +0800 [thread overview]
Message-ID: <20170712171331.GA13374@localhost.didichuxing.com> (raw)
In-Reply-To: <d9e4984e-07f1-c1bd-07be-4e0a4b2a71df@kernel.dk>
On Wed, Jul 12, 2017 at 10:57:37AM -0600, Jens Axboe wrote:
> On 07/12/2017 10:54 AM, weiping zhang wrote:
> > A mapping show as following:
> >
> > hctx cpus
> > hctx0 0 1
> > hctx1 2
> > hctx2 3
> > hctx3 4 5
>
> We already have that information in the /sys/block/<dev>/mq/X/cpu_list
>
> where X is the hardware queue number. Why do we need it in debugfs as
> well, presented differently?
this arribute give a more obviously showing, only by 1 "cat" command.
/sys/bloc/<dev>/mq/X/cpu_list not easy get mapping for all hctx by 1
command.
also /sys/kernel/debug/block/xxx/hctxN/cpuX can export that info, but
these two methods both not obviously.
next prev parent reply other threads:[~2017-07-12 17:13 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-07-12 16:54 [PATCH] blk-mq-debugfs: add mapping show for hw queue to cpu weiping zhang
2017-07-12 16:57 ` Jens Axboe
2017-07-12 17:13 ` weiping zhang [this message]
2017-07-12 17:25 ` Jens Axboe
2017-07-13 14:09 ` weiping zhang
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