Andreas Kloeckner <[email protected]> writes: > Hi Tomasz, > > Tomasz Rybak <[email protected]> writes: >> I've been packaging PyCUDA for Debian. >> I run all the tests to ensure that package works on Python 2 >> and Python 3. All tests pass except for on from test_driver.py: >> >> $ python test_driver.py >> _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ >> _ _ _ _ >> >> self = <test_driver.TestDriver instance at 0x24e7d88> >> >> @mark_cuda_test >> def test_register_host_memory(self): >> if drv.get_version() < (4,): >> from py.test import skip >> skip("register_host_memory only exists on CUDA 4.0 and >> later") >> >> import sys >> if sys.platform == "darwin": >> from py.test import skip >> skip("register_host_memory is not supported on OS X") >> >> a = drv.aligned_empty((2**20,), np.float64, alignment=4096) >>> drv.register_host_memory(a) >> E LogicError: cuMemHostRegister failed: invalid value >> >> test_driver.py:559: LogicError >> ==================== 1 failed, 20 passed in 116.85 seconds >> ===================== >> >> This test fails both on ION (GeForce 9400M, CC 1.1) and GeForce 460 >> (CC 2.1). I've compiled PyCUDA with gcc 4.8, run with kernel 3.9 >> and drivers 304.88. > > Oddly enough, I know about this issue already--my CI server keeps > bugging me about it. I looked into it, but unfortunately I don't quite > know what to make of it. The pointer that gets fed to CUDA has the right > alignment. The same code used to work. The docs for cuMemHostRegister > don't require anything in particular about the arguments passed. I'm > really at a loss. > > My leading theory is "driver bug", but again, I'm not sure. I'd very > much appreciate any insight...
This issue is now tracked at https://github.com/inducer/pycuda/issues/46 . Andreas
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