From mboxrd@z Thu Jan 1 00:00:00 1970 From: bugzilla-daemon@freedesktop.org Subject: [Bug 111987] Unstable performance (periodic and repeating patterns of fps change) and changing VDDGFX Date: Sun, 13 Oct 2019 05:24:15 +0000 Message-ID: References: Mime-Version: 1.0 Content-Type: multipart/mixed; boundary="===============2097363817==" Return-path: Received: from culpepper.freedesktop.org (culpepper.freedesktop.org [131.252.210.165]) by gabe.freedesktop.org (Postfix) with ESMTP id 9253D6E112 for ; Sun, 13 Oct 2019 05:24:15 +0000 (UTC) In-Reply-To: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" To: dri-devel@lists.freedesktop.org List-Id: dri-devel@lists.freedesktop.org --===============2097363817== Content-Type: multipart/alternative; boundary="15709442550.e2DEF88d.581" Content-Transfer-Encoding: 7bit --15709442550.e2DEF88d.581 Date: Sun, 13 Oct 2019 05:24:15 +0000 MIME-Version: 1.0 Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable X-Bugzilla-URL: http://bugs.freedesktop.org/ Auto-Submitted: auto-generated https://bugs.freedesktop.org/show_bug.cgi?id=3D111987 --- Comment #7 from Witold Baryluk -= -- I just also reproduced it using Firefox with WebGL and ShaderToy with custom reasonably complex shader to load the GPU. With frame rate capped to 60 fps= , so that required reasonably complex shader to load it high. I.e. 17 fps at low= s, and 27 fps at highs. The fps patterns is again periodic and repeating, desp= ite the shader not depending on time (constantly output a full screen quad with same pixel content and execution). GPU temperature is constant 28 deg C even at full blast. VDD changes from 1.25 to 1.14, 1.10, 1.05, 0.94, 0.90, and sometimes even to 0.85 V. After a while it jumps back to 1.25V and cycle repeats. --=20 You are receiving this mail because: You are the assignee for the bug.= --15709442550.e2DEF88d.581 Date: Sun, 13 Oct 2019 05:24:15 +0000 MIME-Version: 1.0 Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable X-Bugzilla-URL: http://bugs.freedesktop.org/ Auto-Submitted: auto-generated

Commen= t # 7 on bug 11198= 7 from Witold Baryluk= 
I just also reproduced it using Firefox with WebGL and ShaderT=
oy with custom
reasonably complex shader to load the GPU. With frame rate capped to 60 fps=
, so
that required reasonably complex shader to load it high. I.e. 17 fps at low=
s,
and 27 fps at highs. The fps patterns is again periodic and repeating, desp=
ite
the shader not depending on time (constantly output a full screen quad with
same pixel content and execution).

GPU temperature is constant 28 deg C even at full blast.

VDD changes from 1.25 to 1.14, 1.10, 1.05, 0.94, 0.90, and sometimes even to
0.85 V. After a while it jumps back to 1.25V and cycle repeats.

You are receiving this mail because:
  • You are the assignee for the bug.
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