From: Fino Meng <fino.meng@linux.intel.com>
To: "孙世龙 sunshilong" <sunshilong369@gmail.com>
Cc: xenomai@xenomai.org
Subject: Re: Is it possible to implement a real-time API to read the files on the disk?
Date: Wed, 6 Jan 2021 08:04:14 +0800 [thread overview]
Message-ID: <20210106000413.GA28404@linux.intel.com> (raw)
In-Reply-To: <CAAvDm6au1h8Mqwk5Dqevduk9iMJ8crvzb4pOhhZhO85EgRVCQg@mail.gmail.com>
On Mon, Jan 04, 2021 at 07:58:53PM +0800, 孙世龙 sunshilong via Xenomai wrote:
> Is it possible to implement a real-time API to read the files on the disk?
>
> As far as I know, there is no such an interface now, but is it
> possible to achieve this goal?
>
> I would be grateful to have some help with this question.
>
> Best Regards
> Sunshilong
>
my first thinking, disks are heavily shared resources in a general OS, if
realtime API occupy it for a long time, non-realtime thread all have to
wait.
read a file is too much slow compare a realtime thread's latency/jitter
scope (< 20us)
depends on your use case, maybe possible to add a raw disk, only used by
the time critical code?
BR/fino
next prev parent reply other threads:[~2021-01-06 0:04 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-01-04 11:58 Is it possible to implement a real-time API to read the files on the disk? 孙世龙 sunshilong
2021-01-04 13:22 ` Julien Blanc
2021-01-06 0:04 ` Fino Meng [this message]
2021-01-07 2:03 ` 孙世龙 sunshilong
2021-01-07 2:28 ` Fino Meng
2021-01-07 11:14 ` Wolfgang Denk
2021-01-07 12:12 ` 孙世龙 sunshilong
2021-01-14 16:55 ` Wolfgang Denk
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