at 7:35 PM, Klaus Jensen <i...@irrelevant.dk> wrote:

> 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.

This change is definitely desired.

> 
>                   | iops
>  -----------------+------
>    baseline       | 138k
>    +cqe batching  | 233k

What is the queue depth config for this test?


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