linux-kernel - [DM-Delay] How can I reduce the granularity from mili-sec to nano-sec?

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Date:   Tue, 27 Mar 2018 10:46:12 +0900
From:   강철호 <kbright0912@...il.com>
To:     linux-kernel@...r.kernel.org
Subject: [DM-Delay] How can I reduce the granularity from mili-sec to nano-sec?

To whom it may concern,

Hello, this is Chulho Kang at Seoul National University, the Republic of Korea.
I have a question regarding dm-delay component.

I know this implementation has a limited delay granularity (1ms)
I hope to emulate devices with sub-millisecond delays through the
high-resolution Linux timers.

Could I ask you for advice?
I want to try out this component to “storage performance analysis”
that I’m researching
My aim is to emulate SSD devices latency of being reduced from
mili-sec to nano-sec on
ramdisk using dm-delay.

Best regards,
- Chulho Kang