From: Matthew Wilcox <[email protected]>
To: Peter Zijlstra <[email protected]>
Cc: Xiaobing Li <[email protected]>,
[email protected], [email protected],
[email protected], [email protected],
[email protected], [email protected], [email protected],
[email protected], [email protected], [email protected],
[email protected], [email protected],
[email protected], [email protected],
[email protected], [email protected], [email protected],
[email protected], [email protected],
[email protected]
Subject: Re: [PATCH 3/3] IO_URING: Statistics of the true utilization of sq threads.
Date: Thu, 28 Sep 2023 09:37:39 +0100 [thread overview]
Message-ID: <[email protected]> (raw)
In-Reply-To: <[email protected]>
On Thu, Sep 28, 2023 at 10:01:14AM +0200, Peter Zijlstra wrote:
> Now, I see what you're trying to do, but who actually uses this data?
I ... don't. There seems to be the notion that since we're polling, that
shouldn't count against the runtime of the thread. But the thread has
chosen to poll! It is doing something! For one thing, it's preventing
the CPU from entering an idle state. It seems absolutely fair to
accuont this poll time to the runtime of the thread. Clearly i'm
missing something.
next prev parent reply other threads:[~2023-09-28 8:38 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <CGME20230928023004epcas5p4a6dac4cda9c867f3673690521a8c18b6@epcas5p4.samsung.com>
2023-09-28 2:22 ` [PATCH 0/3] Sq thread real utilization statistics Xiaobing Li
[not found] ` <CGME20230928023007epcas5p276b6e029a67001a6ed8ab28c05b2be9c@epcas5p2.samsung.com>
2023-09-28 2:22 ` [PATCH 1/3] SCHEDULER: Add an interface for counting real utilization Xiaobing Li
2023-09-28 7:52 ` kernel test robot
2023-09-28 8:02 ` Peter Zijlstra
2023-09-29 0:31 ` Thomas Gleixner
[not found] ` <CGME20230928023011epcas5p32668b193b447f1cd6bf78035f4894c42@epcas5p3.samsung.com>
2023-09-28 2:22 ` [PATCH 2/3] PROC FILESYSTEM: Add real utilization data of sq thread Xiaobing Li
[not found] ` <CGME20230928023015epcas5p273b3eaebf3759790c278b03c7f0341c8@epcas5p2.samsung.com>
2023-09-28 2:22 ` [PATCH 3/3] IO_URING: Statistics of the true utilization of sq threads Xiaobing Li
2023-09-28 8:01 ` Peter Zijlstra
2023-09-28 8:23 ` Jens Axboe
2023-09-28 8:37 ` Matthew Wilcox [this message]
2023-09-28 8:41 ` Jens Axboe
2023-09-28 18:33 ` kernel test robot
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