Bug 59639

Summary:

Performance regression on Intel 945GM since 2.20.18

Product:

DRI

Reporter:

guns <self>

Component:

DRM/Intel

Assignee:

Intel GFX Bugs mailing list <intel-gfx-bugs>

Status:

CLOSED FIXED

QA Contact:

Intel GFX Bugs mailing list <intel-gfx-bugs>

Severity:

normal

Priority:

medium

Version:

unspecified

Hardware:

x86-64 (AMD64)

OS:

Linux (All)

Whiteboard:

i915 platform:

i915 features:

Attachments:

Description	Flags
Xorg logfile with intel driver 2.20.19	none

Description guns 2013-01-20 23:48:30 UTC

Created attachment 73351 [details]
Xorg logfile with intel driver 2.20.19

Hello,

Regular 2D rendering has been much slower since 2.20.18 on an old
Macbook with the following specs:

    Kernel: 3.6.11-1-ARCH x86_64 (64 bit)
    Desktop: Openbox 3.5.0
    Distro: Arch Linux
    Card: Intel Mobile 945GM/GMS 943/940GML Express
          Integrated Graphics Controller
    X.Org: 1.13.1
    driver: intel
    Resolution: 1280x800@59.9hz
    GLX Renderer: Mesa DRI Intel 945GM
    GLX Version: 1.4 Mesa 9.0.1

In particular, window redrawing is very choppy, and moving / resizing
windows is much less responsive than before.

For control, no other software was updated on the system, and a
reversion to 2.20.17 immediately fixes the problem. There are no notable
differences between the Xorg logfiles when using 2.20.17 vs 2.20.19
(attached).

I have decided to report here since the Arch package applies no patches
and configures with just --prefix=/usr --enable-dri

Thank you for the excellent software.

Comment 1 Chris Wilson 2013-01-21 02:12:27 UTC

commit fdda97007b1dbf95beb16a0e3510fd36c89e8c33
Author: Chris Wilson <chris@chris-wilson.co.uk>
Date:   Fri Jan 11 00:55:12 2013 +0000

    intel: Remove the fence count contributions when clearing relocs
    
    As we clear the relocs from the bo, we also need to clear the
    contribution of the reloc_target_bo from the fence count. Otherwise they
    are leaked and prevent any further relocations being added to the bo.

Install libdrm-intel-2.4.41

Comment 2 guns 2013-01-21 02:27:37 UTC

Thank you. I will try to document this dependency in the Arch packages.

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