Thread (30 messages) 30 messages, 6 authors, 2017-03-22

Re: [PATCH rfc 09/10] nvmet: Use non-selective polling

From: Johannes Thumshirn <hidden>
Date: 2017-03-09 13:55:06
Also in: linux-nvme, linux-rdma

On 03/09/2017 02:16 PM, Sagi Grimberg wrote:
It doesn't really make sense to do selective polling
because we never care about specific IOs. Non selective
polling can actually help by doing some useful work
while we're submitting a command.

We ask for a batch of (magic) 4 completions which looks
like a decent network<->backend proportion, if less are
available we'll see less.

Signed-off-by: Sagi Grimberg <sagi@grimberg.me>
---
Just out of curiosity, how did you come up with the magic 4?

Thanks,
	Johannes

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Johannes Thumshirn                                          Storage
jthumshirn@suse.de                                +49 911 74053 689
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