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From: bugzilla-daemon@bugzilla.kernel.org
To: dri-devel@lists.freedesktop.org
Subject: [Bug 207667] power_dpm_force_performance_level set to "low" reduces CPU performance (Vega 8 / Ryzen 2200G)
Date: Thu, 14 May 2020 05:47:48 +0000	[thread overview]
Message-ID: <bug-207667-2300-GINfFJRoSR@https.bugzilla.kernel.org/> (raw)
In-Reply-To: <bug-207667-2300@https.bugzilla.kernel.org/>

https://bugzilla.kernel.org/show_bug.cgi?id=207667

alekshs@hotmail.com changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
         Resolution|---                         |INVALID

--- Comment #1 from alekshs@hotmail.com ---
I think I discovered what's the issue by playing with a utility called
RyzenAdj.

With RyzenAdj when setting the igp freq to 200 from 400 it doesn't do much for
power consumption. It's when I play with the CPU-GPU speed parameter (fabric
speed?) that power consumption goes down significantly. 

So apparently power_dpm_force_performance_level to low sets both MHz and fabric
speed lower. The first wouldn't make sense to affect CPU performance, the
second is known to affect it - so after thinking about it more, I don't think
it's a bug.

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      reply	other threads:[~2020-05-14  5:47 UTC|newest]

Thread overview: 2+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-05-09 20:48 [Bug 207667] New: power_dpm_force_performance_level set to "low" reduces CPU performance (Vega 8 / Ryzen 2200G) bugzilla-daemon
2020-05-14  5:47 ` bugzilla-daemon [this message]

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