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Hang on to old modules to avoid syncing

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Steven Robertson 2012-02-15 10:07:47 -05:00
parent ed09cc6955
commit 5a91d9f96c
1 changed files with 10 additions and 0 deletions
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cuburn/render.py
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@ -194,11 +194,21 @@ class DevInfo(object):
self.d_pal_array = cuda.Array(self.palette_surf_dsc) self.d_pal_array = cuda.Array(self.palette_surf_dsc)
class Renderer(object): class Renderer(object):
# Unloading a module triggers a context sync. To keep the renderer
# asynchronous, and avoid expensive CPU polling, this hangs on to
# a number of (relatively small) CUDA modules and flushes them together.
MAX_MODREFS = 20
_modrefs = []
def __init__(self, gnm): def __init__(self, gnm):
self.packer, self.lib = iter.mkiterlib(gnm) self.packer, self.lib = iter.mkiterlib(gnm)
cubin = util.compile('iter', assemble_code(self.lib)) cubin = util.compile('iter', assemble_code(self.lib))
self.mod = cuda.module_from_buffer(cubin) self.mod = cuda.module_from_buffer(cubin)
if len(self._modrefs) > self.MAX_MODREFS:
del self._modrefs[:]
self._modrefs.append(self.mod)
# TODO: make these customizable # TODO: make these customizable
self.filts = [ filters.Bilateral() self.filts = [ filters.Bilateral()
, filters.Logscale() , filters.Logscale()