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From: Tom Hromatka <tom.hromatka@oracle.com>
To: linux-kernel@vger.kernel.org, linux-fsdevel@vger.kernel.org,
	tglx@linutronix.de
Cc: fweisbec@gmail.com, mingo@kernel.org, adobriyan@gmail.com
Subject: Re: [PATCH 0/2] iowait and idle fixes in /proc/stat
Date: Tue, 14 Jul 2020 12:55:41 -0600	[thread overview]
Message-ID: <85937052-fcdf-8bd7-83ec-831a51e320cb@oracle.com> (raw)
In-Reply-To: <20200610210549.61193-1-tom.hromatka@oracle.com>

Ping.

Thanks.

Tom


On 6/10/20 3:05 PM, Tom Hromatka wrote:
> A customer is using /proc/stat to track cpu usage in a VM and noted
> that the iowait and idle times behave strangely when a cpu goes
> offline and comes back online.
>
> This patchset addresses two issues that can cause iowait and idle
> to fluctuate up and down.  With these changes, cpu iowait and idle
> now only monotonically increase.
>
> Tom Hromatka (2):
>    tick-sched: Do not clear the iowait and idle times
>    /proc/stat: Simplify iowait and idle calculations when cpu is offline
>
>   fs/proc/stat.c           | 24 ++++++------------------
>   kernel/time/tick-sched.c |  9 +++++++++
>   2 files changed, 15 insertions(+), 18 deletions(-)
>


      parent reply	other threads:[~2020-07-14 19:04 UTC|newest]

Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-06-10 21:05 [PATCH 0/2] iowait and idle fixes in /proc/stat Tom Hromatka
2020-06-10 21:05 ` [PATCH 1/2] tick-sched: Do not clear the iowait and idle times Tom Hromatka
2020-06-10 21:05 ` [PATCH 2/2] /proc/stat: Simplify iowait and idle calculations when cpu is offline Tom Hromatka
2020-07-14 18:55 ` Tom Hromatka [this message]

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