显存估算精度变差

@wengjun 遇到了爆显存问题：

juno/OSIRIS/production#39 (comment 40928)

我也遇到了：

╭─heroxbd@cat /mnt/stage/OSIRIS/calibration/FSMP ‹master› 
╰─$ ipython3 -i ./fsmp.py -- sparsify/0310/003616/0.h5 -o fsmp/0310/003616/0.pq --ref SER.h5

File /opt/gentoo/usr/lib/python3.11/site-packages/cupy/_creation/from_data.py:75, in asarray(a, dtype, order)
     49 def asarray(a, dtype=None, order=None):
     50     """Converts an object to array.
     51 
     52     This is equivalent to ``array(a, dtype, copy=False, order=order)``.
   (...)
     73 
     74     """
---> 75     return _core.array(a, dtype, False, order)

File cupy/_core/core.pyx:2376, in cupy._core.core.array()

File cupy/_core/core.pyx:2400, in cupy._core.core.array()

File cupy/_core/core.pyx:2547, in cupy._core.core._array_default()

File cupy/cuda/memory.pyx:483, in cupy.cuda.memory.MemoryPointer.copy_from_host_async()

File cupy_backends/cuda/api/runtime.pyx:935, in cupy_backends.cuda.api.runtime.streamIsCapturing()

File cupy_backends/cuda/api/runtime.pyx:144, in cupy_backends.cuda.api.runtime.check_status()

CUDARuntimeError: cudaErrorIllegalAddress: an illegal memory access was encountered