From: Vipin <vj358@nyu.edu>
To: dri-devel@lists.freedesktop.org
Subject: Empty /proc/dri/0/bufs queues
Date: Thu, 11 Aug 2011 13:34:50 -0400 [thread overview]
Message-ID: <4E4412BA.9000508@nyu.edu> (raw)
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Hello all,
I have been trying to study the radeon open source driver and have some
questions after turning the debug flag on.
System Information ---------------
uname -a
Linux gilubuntu1 3.0.1vipindebug #1 SMP Thu Aug 11 11:17:24 EDT 2011
i686 GNU/Linux
kernel option - drm.debug=1
glxinfo | grep rendering
direct rendering: Yes
lspci -vvv | grep ATI
01:00.0 VGA compatible controller: ATI Technologies Inc RV710 [Radeon HD
4550] (prog-if 00 [VGA controller])
Subsystem: ATI Technologies Inc Device 0104
lsmod - relevant entries
ttm 110688 1 radeon
drm_kms_helper 49424 1 radeon
drm 317625 5 radeon,ttm,drm_kms_helper
agpgart 56250 2 ttm,drm
i2c_algo_bit 10782 1 radeon
---------------------------------------------------------------------
Question 1.
Empty /proc/dri/0 bufs, queues files
Is this an expected behavior ?
I have tried generating extensive 3D workloads, but the file remains empty.
Question 2.
/sys/kernel/debug/dri/
There are two directories 0 & 64, what does the 64 entry signify ?
Question 3.
The contents of /sys/kernel/debug/dri/0 contains 15 radeon_ib_00xx
Does this mean, the card has 15 indirect buffers ? Also, does this
interface shows me the ringbuffer data like i915.
Question 4.
The kernel log shows entries like these (massive amounts)
Aug 11 13:19:01 gilubuntu1 kernel: [ 4251.705377] [drm:drm_ioctl],
pid=1544, cmd=0xc0086464, nr=0x64, dev 0xe200, auth=1
Aug 11 13:19:01 gilubuntu1 kernel: [ 4251.705394] [drm:r600_irq_set],
r600_irq_set: sw int
Shouldn't it have other debug entries other than these two ?
Thank You
Vipin Jain
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