From: Keith Busch <kbusch@kernel.org>
To: Jeff Johnson <jeff.johnson@aeoncomputing.com>
Cc: linux-nvme@lists.infradead.org
Subject: Re: Pinning nvme interrupts to a single cpu?
Date: Mon, 27 Apr 2020 21:37:19 -0600 [thread overview]
Message-ID: <20200428033718.GA5085@keith-busch> (raw)
In-Reply-To: <CAFCYAscnovJyA0cKeHVxS20+zGgMj4P5ECb95aZE8=o=Wh+5bg@mail.gmail.com>
On Mon, Apr 27, 2020 at 05:10:47PM -0700, Jeff Johnson wrote:
> Is it possible to limit nvme interrupts to a single cpu, rather than
> spread them across many?
The managed interrupts provided by the irq subsystem that the nvme
driver uses doesn't allow altering the cpu affinity. The only way to
have all interrupts handled by a single cpu is to have only one nvme IO
queue, but you don't get to choose the cpu.
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next prev parent reply other threads:[~2020-04-28 3:37 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-04-28 0:10 Pinning nvme interrupts to a single cpu? Jeff Johnson
2020-04-28 3:37 ` Keith Busch [this message]
2020-04-28 3:46 ` Ming Lei
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