From: keith.busch@intel.com (Keith Busch)
Subject: NVMe and IRQ Affinity
Date: Tue, 2 Feb 2016 23:58:19 +0000 [thread overview]
Message-ID: <20160202235818.GB21046@localhost.localdomain> (raw)
In-Reply-To: <CACo6K_YGiH2ER4s21OzmD69LDL+ES0PO54jJ_efcSFw7pHADvQ@mail.gmail.com>
On Wed, Feb 03, 2016@12:50:06AM +0100, Mark Jacobson wrote:
> Output is below. I'm aware the distro hints are fairly invalid.
They're all invalid. This kernel must have forked before the affinity
hints were fixed for a blk-mq nvme driver. A more optimal affinity hint
would match the mq's cpu_list, which is how it looks upstream.
I guess your platform strongly prefers CPU 0 when allowed. You can
either manually override the smp_affinity, use an out-of-tree driver
with a fix and let irqbalance handle it.
next prev parent reply other threads:[~2016-02-02 23:58 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-02-02 23:31 NVMe and IRQ Affinity Mark Jacobson
2016-02-02 23:45 ` Keith Busch
2016-02-02 23:50 ` Mark Jacobson
2016-02-02 23:58 ` Keith Busch [this message]
2016-02-03 0:13 ` Mark Jacobson
2016-02-03 14:30 ` Keith Busch
2016-02-03 18:31 ` Azher Mughal
2016-02-03 18:58 ` Keith Busch
2016-02-03 16:14 ` Kim Kyungsan
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