Re: [PATCH] hw/nvme: reenable cqe batching

[Klaus Jensen]

On Oct 20 13:35, Klaus Jensen wrote:
> From: Klaus Jensen <k.jensen@samsung.com>
> 
> Commit 2e53b0b45024 ("hw/nvme: Use ioeventfd to handle doorbell
> updates") had the unintended effect of disabling batching of CQEs.
> 
> This patch changes the sq/cq timers to bottom halfs and instead of
> calling nvme_post_cqes() immediately (causing an interrupt per cqe), we
> defer the call.
> 
>                    | iops
>   -----------------+------
>     baseline       | 138k
>     +cqe batching  | 233k
> 
> Fixes: 2e53b0b45024 ("hw/nvme: Use ioeventfd to handle doorbell updates")
> Signed-off-by: Klaus Jensen <k.jensen@samsung.com>

Thanks for the reviews, applied to nvme-next!

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