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From: Thomas Monjalon <thomas@monjalon.net>
To: David Hunt <david.hunt@intel.com>
Cc: stable@dpdk.org, dev@dpdk.org, anatoly.burakov@intel.com
Subject: Re: [dpdk-dev] [dpdk-stable] [PATCH v1] examples/power: fix oob frequency oscillations
Date: Tue, 12 Nov 2019 08:23:29 +0100	[thread overview]
Message-ID: <1922197.y3yMgDX9VE@xps> (raw)
In-Reply-To: <20190724131803.30066-1-david.hunt@intel.com>

24/07/2019 15:18, David Hunt:
> The branch ratio algorithm in the vm_power_manager sample application
> can be very sensitive at patricular loads in a workload, causing
> oscillations between min and max frequency. For example, if a
> workload is at 50%, scaling up may change the ratio
> enough that it immediately thinks it needs to scale down again.
> 
> This patch introduces a sliding window recording the scale up/down
> direction for the last 32 samples, and scales up if any samples indicate
> we should scale up, otherwise scale down. Each core has it's own window.
> 
> Fixes: 4b1a631b8a8a ("examples/vm_power: add oob monitoring functions")
> Cc: stable@dpdk.org
> Signed-off-by: David Hunt <david.hunt@intel.com>

Applied, thanks




      parent reply	other threads:[~2019-11-12  7:24 UTC|newest]

Thread overview: 8+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-07-24 13:18 [dpdk-dev] [PATCH v1] examples/power: fix oob frequency oscillations David Hunt
2019-07-26 10:15 ` Burakov, Anatoly
2019-08-06 11:18   ` Thomas Monjalon
2019-10-27 18:35     ` Thomas Monjalon
2019-10-29 14:05       ` Hunt, David
2019-11-01 23:00         ` Thomas Monjalon
2019-11-04 10:16           ` Burakov, Anatoly
2019-11-12  7:23 ` Thomas Monjalon [this message]

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