From: Jens Axboe <[email protected]>
To: Stefan Hajnoczi <[email protected]>, Ming Lei <[email protected]>
Cc: [email protected]
Subject: Re: Resizing io_uring SQ/CQ?
Date: Wed, 15 Mar 2023 09:18:22 -0600 [thread overview]
Message-ID: <[email protected]> (raw)
In-Reply-To: <20230310165628.GA491749@fedora>
On 3/10/23 9:56 AM, Stefan Hajnoczi wrote:
> On Fri, Mar 10, 2023 at 11:14:04PM +0800, Ming Lei wrote:
>
> Hi Ming,
> Another question about this:
>
> Does the io worker thread pool have limits so that eventually work
> queues up and new work is not able to execute until in-flight work
> completes?
It's effectively limited by how many processes you are allowed to
create. If you exceed that limit, then yes you would have work
sitting behind other work, and that new work won't get to run
before _something_ completes.
But no ring sizing will save that, you've effectively exhausted
any resources in the system, at least for you.
--
Jens Axboe
next prev parent reply other threads:[~2023-03-15 15:18 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-03-09 13:48 Resizing io_uring SQ/CQ? Stefan Hajnoczi
2023-03-10 1:38 ` Ming Lei
2023-03-10 2:58 ` Jens Axboe
2023-03-10 3:42 ` Vito Caputo
2023-03-10 13:44 ` Stefan Hajnoczi
2023-03-10 15:14 ` Ming Lei
2023-03-10 16:39 ` Stefan Hajnoczi
2023-03-10 16:56 ` Stefan Hajnoczi
2023-03-15 15:18 ` Jens Axboe [this message]
2023-03-15 15:15 ` Stefan Hajnoczi
2023-03-15 15:19 ` Jens Axboe
2023-03-15 19:01 ` Stefan Hajnoczi
2023-03-15 19:10 ` Jens Axboe
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