From: m@bjorling.me (Matias Bjorling)
Subject: [PATCH 0/3] Convert from bio-based to blk-mq v2
Date: Fri, 18 Oct 2013 21:21:36 +0200 [thread overview]
Message-ID: <52618A40.6010105@bjorling.me> (raw)
In-Reply-To: <20131018154801.GQ16716@linux.intel.com>
On 10/18/2013 05:48 PM, Matthew Wilcox wrote:
> On Fri, Oct 18, 2013@03:14:19PM +0200, Matias Bjorling wrote:
>> Performance study:
>>
>> System: HGST Research NVMe prototype, Haswell i7-4770 3.4Ghz, 32GB 1333Mhz
>
> I don't have one of these. Can you provide more details about it,
> such as:
> - How many I/O queues does it have?
> - Are the interrupts correctly bound to the CPUs (for both sets of tests)?
> The driver isn't allowed to set the irq affinity correctly itself;
> it can only set a hint and userspace (eg irqbalance) has to set the
> affinity correctly
> - Does it support interrupt coalescing? If so, have you managed to do any
> testing using that feature?
>
Current implementation is a driven using a PCI-e Gen2x4 interface, two
I/O queues. One for admin and one for all other I/Os. I'll check up on
IRQ affinity when multiple queues are available. I haven't yet tested
interrupt coalescing.
WARNING: multiple messages have this Message-ID (diff)
From: Matias Bjorling <m@bjorling.me>
To: Matthew Wilcox <willy@linux.intel.com>
Cc: axboe@kernel.dk, keith.busch@intel.com,
linux-kernel@vger.kernel.org, linux-nvme@lists.infradead.org
Subject: Re: [PATCH 0/3] Convert from bio-based to blk-mq v2
Date: Fri, 18 Oct 2013 21:21:36 +0200 [thread overview]
Message-ID: <52618A40.6010105@bjorling.me> (raw)
In-Reply-To: <20131018154801.GQ16716@linux.intel.com>
On 10/18/2013 05:48 PM, Matthew Wilcox wrote:
> On Fri, Oct 18, 2013 at 03:14:19PM +0200, Matias Bjorling wrote:
>> Performance study:
>>
>> System: HGST Research NVMe prototype, Haswell i7-4770 3.4Ghz, 32GB 1333Mhz
>
> I don't have one of these. Can you provide more details about it,
> such as:
> - How many I/O queues does it have?
> - Are the interrupts correctly bound to the CPUs (for both sets of tests)?
> The driver isn't allowed to set the irq affinity correctly itself;
> it can only set a hint and userspace (eg irqbalance) has to set the
> affinity correctly
> - Does it support interrupt coalescing? If so, have you managed to do any
> testing using that feature?
>
Current implementation is a driven using a PCI-e Gen2x4 interface, two
I/O queues. One for admin and one for all other I/Os. I'll check up on
IRQ affinity when multiple queues are available. I haven't yet tested
interrupt coalescing.
next prev parent reply other threads:[~2013-10-18 19:21 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-10-18 13:14 [PATCH 0/3] Convert from bio-based to blk-mq v2 Matias Bjorling
2013-10-18 13:14 ` Matias Bjorling
2013-10-18 13:14 ` [PATCH 1/3] blk-mq: call exit_hctx on hw queue teardown Matias Bjorling
2013-10-18 13:14 ` Matias Bjorling
2013-10-18 13:14 ` [PATCH 2/3] NVMe: Extract admin queue size Matias Bjorling
2013-10-18 13:14 ` Matias Bjorling
2013-10-18 13:14 ` [PATCH 3/3] NVMe: Convert to blk-mq Matias Bjorling
2013-10-18 13:14 ` Matias Bjorling
2013-10-18 15:13 ` Keith Busch
2013-10-18 15:13 ` Keith Busch
2013-10-18 19:06 ` Matias Bjørling
2013-10-18 19:06 ` Matias Bjørling
2013-10-22 16:55 ` Keith Busch
2013-10-22 16:55 ` Keith Busch
2013-10-22 18:55 ` Matias Bjorling
2013-10-22 18:55 ` Matias Bjorling
2013-10-22 19:52 ` Keith Busch
2013-10-22 19:52 ` Keith Busch
2013-10-18 15:48 ` [PATCH 0/3] Convert from bio-based to blk-mq v2 Matthew Wilcox
2013-10-18 15:48 ` Matthew Wilcox
2013-10-18 19:10 ` Matias Bjørling
2013-10-18 19:10 ` Matias Bjørling
2013-10-18 19:21 ` Matias Bjorling [this message]
2013-10-18 19:21 ` Matias Bjorling
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