From mboxrd@z Thu Jan 1 00:00:00 1970 From: bugzilla-daemon@freedesktop.org Subject: [Bug 97260] [bisected] R9 290 low performance in Linux 4.7 Date: Fri, 12 Aug 2016 19:58:07 +0000 Message-ID: References: Mime-Version: 1.0 Content-Type: multipart/mixed; boundary="===============0904172769==" Return-path: Received: from culpepper.freedesktop.org (culpepper.freedesktop.org [IPv6:2610:10:20:722:a800:ff:fe98:4b55]) by gabe.freedesktop.org (Postfix) with ESMTP id 349376EC20 for ; Fri, 12 Aug 2016 19:58:07 +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 --===============0904172769== Content-Type: multipart/alternative; boundary="14710318872.6abe11.27185"; charset="UTF-8" --14710318872.6abe11.27185 Date: Fri, 12 Aug 2016 19:58:07 +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=3D97260 Kai changed: What |Removed |Added ---------------------------------------------------------------------------- Keywords| |bisected CC| |michel@daenzer.net Summary|R9 290 low performance in |[bisected] R9 290 low |Linux 4.7 |performance in Linux 4.7 --- Comment #12 from Kai --- Ok, after 14 steps of bisection I identified the first bad commit as: c63dd758589b1f7e8398841d1f443f06ebfbcefc is the first bad commit commit c63dd758589b1f7e8398841d1f443f06ebfbcefc Author: Michel D=C3=A4nzer Date: Fri Apr 1 18:51:34 2016 +0900 drm/radeon: Support DRM_MODE_PAGE_FLIP_ASYNC When this flag is set, we program the hardware to execute the flip during horizontal blank (i.e. for the next scanline) instead of during vertical blank (i.e. for the next frame). Currently this is only supported on ASICs which have a page flip completion interrupt (>=3D R600), and only if the use_pflipirq parameter has value 2 (the default). Reviewed-by: Christian K=C3=B6nig Signed-off-by: Michel D=C3=A4nzer Signed-off-by: Alex Deucher :040000 040000 2f3d8295e7fa2809a3546a23c64da33311e624b9 6cd9fd9b53df0942efab559295e4c11fc6cc0463 M drivers An additional build of 4.7.0 with c63dd758589b1f7e8398841d1f443f06ebfbcefc reverted maintains the performance level of 4.6.x. Adding Michel to the CC list of this bug, since he authored the offending commit. Let me know, if you need anything else. --=20 You are receiving this mail because: You are the assignee for the bug.= --14710318872.6abe11.27185 Date: Fri, 12 Aug 2016 19:58:07 +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 Kai changed bug 97260<= /a>
What Removed Added
Keywords   bisected
CC   michel@daenzer.net
Summary R9 290 low performance in Linux 4.7 [bisected] R9 290 low performance in Linux 4.7

Commen= t # 12 on bug 97260<= /a> from Kai 
Ok, after 14 steps of bisection I identified the first bad com=
mit as:

c63dd758589b1f7e8398841d1f443f06ebfbcefc is the first bad commit
commit c63dd758589b1f7e8398841d1f443f06ebfbcefc
Author: Michel D=C3=A4nzer <michel.daenzer@amd.com>
Date:   Fri Apr 1 18:51:34 2016 +0900

    drm/radeon: Support DRM_MODE_PAGE_FLIP_ASYNC

    When this flag is set, we program the hardware to execute the flip
    during horizontal blank (i.e. for the next scanline) instead of during
    vertical blank (i.e. for the next frame).

    Currently this is only supported on ASICs which have a page flip
    completion interrupt (>=3D R600), and only if the use_pflipirq param=
eter
    has value 2 (the default).

    Reviewed-by: Christian K=C3=B6nig <christian.koenig@amd.com>
    Signed-off-by: Michel D=C3=A4nzer <michel.daenzer@amd.com>
    Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

:040000 040000 2f3d8295e7fa2809a3546a23c64da33311e624b9
6cd9fd9b53df0942efab559295e4c11fc6cc0463 M      drivers

An additional build of 4.7.0 with c63dd758589b1f7e8398841d1f443f06ebfbcefc
reverted maintains the performance level of 4.6.x.

Adding Michel to the CC list of this bug, since he authored the offending
commit. Let me know, if you need anything else.

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