keep track of the size of each allocation
keep track of the size of each allocation

[git-p4: depot-paths = "//sw/gpgpu/nvbio/main/": change = 18282650]

NVlabs/nvbio,NVlabs/nvbio,NVlabs/nvbio,kimrutherford/nvbio,NVlabs/nvbio,kimrutherford/nvbio,kimrutherford/nvbio,kimrutherford/nvbio