Re: Crash with multitile-sort

Paul Melis <[email protected]>
Newsgroups gmane.comp.graphics.chromium.user
Message-ID <[email protected]> 
Brian Paul wrote:

> Paul Melis wrote:
>
>> Paul Melis wrote:
>>
>>
>>> Hello,
>>> While attempting to create a multi-tilesort configuration based on 
>>> the multitilesort.conf file included with CR1.9 two things happen:
>>> 1. I get a warning about the state tracker being re-initialized
>>> 2. One of the crservers crashes (backtrace from the coredump shows 
>>> it to be in crSPUCopyDispatchTable()).
>>>
>>>
>>
>> Just a bit more info, the crash is happening in spu_loader/spucopy.c, 
>> crSPUCopyDispatchTable().
>> In the first for-loop, the assignment temp = dst->copy_of->copyList 
>> sets temp to 0x1, which is later used as temp->copy.
>>
>> #0  0x5557f040 in crSPUCopyDispatchTable (dst=0x80d62c0, 
>> src=0x817d8c8) at spucopy.c:630
>> 630                             if (temp->copy == dst)
>> (gdb) bt
>> #0  0x5557f040 in crSPUCopyDispatchTable (dst=0x80d62c0, 
>> src=0x817d8c8) at spucopy.c:630
>> #1  0x08087fc5 in crStateDiffAPI (api=0x817d8c8) at state_flush.c:33
>> #2  0x080515e0 in crServerInit (argc=1, argv=0xffffd494) at 
>> server_main.c:240
>> #3  0x08051655 in CRServerMain (argc=1, argv=0xffffd494) at 
>> server_main.c:254
>> #4  0x08051012 in main (argc=1, argv=0xffffd494) at main.c:22
>> (gdb) p temp
>> $1 = (struct _copy_list_node *) 0x1
>> (gdb) p dst->copy_of
>> $2 = (struct _spu_dispatch_table *) 0xffffa520
>> (gdb)
>
>
> The demo was crashing for me too, but in a different way. I've checked 
> in fixes to tilesortspu_get.c and state_bufferobject.c that fixed 
> things here.  Can you try the current CVS code?

I'm sorry to say it doesn't fix the crash I'm experiencing. The stack 
trace above is still valid. I've attached a reduced version of my 
original configuration script. This shows the crash for me when running 
with e.g. "python multitilesort_crash.conf glxgears", but other apps 
fail in the same way.

I had some trouble figuring out how exactly to set up the tiling 
parameters for this setup, so I might be doing something unusual there.

Paul


-- 
Paul Melis

VR Specialist,
Center for High-Performance Computing & Visualization,
University of Groningen,
The Netherlands

T: +31 50 363 9298
E: [email protected]
W: http://www.rug.nl/rc/hpcv/index

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multitilesort_crash.conf (text/plain, 3.7 KB) 
#!/usr/bin/env python
import sys
import math

sys.path.append('/home/rugrchpc/melis/cr-cvs/mothership/server')

from mothership import *
print "CR bin dir:", crbindir
print "CR lib dir:", crlibdir

import crmatrix

# networking params

MTU = 3*1024*1024

#
# Main chromium object
#

cr = CR()

cr.MTU(MTU)


#
# Application node
#

app = ' '.join(sys.argv[1:])

app_node = CRApplicationNode()

app_node.StartDir(crbindir)
app_node.SetApplication(app)

app_node.Conf('track_window_size', 1)

cr.AddNode(app_node)

# 
# Master display node
#

wall_width = 1024
wall_height = 768

master_display_node = CRNetworkNode('localhost')

master_render_spu = SPU('render')
#master_render_spu.Conf('fake_window_dims', [wall_width, wall_height])
master_render_spu.Conf('render_to_app_window', 1)
master_render_spu.Conf('window_geometry', [0, 0, 640, 480])
master_display_node.AddSPU(master_render_spu)
master_display_node.AddTile(0, 0, 640, 480)

cr.AddNode(master_display_node)

#
# First tilesort SPU, splits the stream in two identical ones
# - One for unaltered display by the master node 
# - Other stream goes to a second tilesort after being filtered to
#   rip out the 2D content before distributing to the slave nodes
#

def layout_tiles_identical(mural_width, mural_height):
	
	"""Return 2 identical tiles, in effect 'splitting' the
	   OpenGL stream into 2 identical streams.
	   Returns a list of tuples of (server_index, x, y, width, height)"""

	tiles = []

	tiles.append( (0, 0, 0, mural_width, mural_height) )
	tiles.append( (1, 0, 0, mural_width, mural_height) )
	
	return tiles
	
split_tilesort_spu = SPU('tilesort')
split_tilesort_spu.TileLayoutFunction(layout_tiles_identical)
app_node.AddSPU(split_tilesort_spu)


#
# Slave tilesort node
#

slave_tilesort_node = CRNetworkNode('localhost')

# insert 3D content filter
#filter3dspu = SPU('filter3d')
#slave_tilesort_node.AddSPU(filter3dspu)

# add tile-sorting based on frusta
slave_tilesort_spu = SPU('tilesort')

slave_tilesort_spu.Conf('fake_window_dims', [wall_width, wall_height])
#slave_tilesort_spu.Conf('fake_window_dims', [640, 480])

# Do bucketing by testing bounding boxes against viewing frustums
slave_tilesort_spu.Conf('bucket_mode', 'Frustum')

slave_tilesort_node.AddSPU(slave_tilesort_spu)
slave_tilesort_node.AddTile(0, 0, 640, 480)

cr.AddNode(slave_tilesort_node)


# Add master and slave nodes to first tilesort SPU
split_tilesort_spu.AddServer(master_display_node, protocol='tcpip', port=7000)
split_tilesort_spu.AddServer(slave_tilesort_node, protocol='tcpip', port=7001)

master_display_node.Conf('optimize_bucket', 0)
slave_tilesort_node.Conf('optimize_bucket', 0)

#
# Add each of the 3 slave nodes
#

#for nodenum in [1]:
for nodenum in [1, 2, 3]:

	slave_node = CRNetworkNode('node%d' % nodenum)

	slave_node.Conf('optimize_bucket', 0)
	slave_node.AddTile(0, 0, wall_width, wall_height)

	#
	# render SPU
	#

	render_spu = SPU('render')	
	render_spu.Conf('fullscreen', 1)
		
	slave_node.AddSPU(render_spu)

	#
	# viewpoint offsets and projection matrices for theatre projectors
	#
	
	cr.AddNode(slave_node)
	
	slave_tilesort_spu.AddServer(slave_node, protocol='tcpip', port=7001+nodenum)

	#
	# autostart
	#
	
	slave_node.AutoStart( [
		"/usr/bin/rsh", "node%d" % nodenum,
		"/bin/sh -c 'DISPLAY=:0.0  CRMOTHERSHIP=master  LD_LIBRARY_PATH=%s  %s/crserver'" % (crlibdir, crbindir)
	] )

	
#
# Autostart
#

args = "DISPLAY=:0.0  CRMOTHERSHIP=master  LD_LIBRARY_PATH=%s  %s/crserver" % (crlibdir, crbindir)

master_display_node.AutoStart( [ '/bin/sh', '-c', args	] )
slave_tilesort_node.AutoStart( [ '/bin/sh', '-c', args	] )

app_node.AutoStart( [
	"/bin/sh", "-c", 'CRMOTHERSHIP=localhost  LD_LIBRARY_PATH=%s:$LD_LIBRARY_PATH  %s/crappfaker' % (crlibdir, crbindir)
] )
	
cr.Go()
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