[PATCH 0/3] Convert from bio-based to blk-mq v2
Matias Bjørling
m at bjorling.me
Fri Oct 18 15:10:22 EDT 2013
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 impletation is an 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.
More information about the Linux-nvme
mailing list