On Tue, Mar 22, 2022 at 08:41:55AM -0700, "T.J. Mercier" <tjmercier@xxxxxxxxxx> wrote: > So "total" is used twice here in two different contexts. > The first one is the global "GPU" cgroup context. As in any buffer > that any exporter claims is a GPU buffer, regardless of where/how it > is allocated. So this refers to the sum of all gpu buffers of any > type/source. An exporter contributes to this total by registering a > corresponding gpucg_device and making charges against that device when > it exports. > The second one is in a per device context. This allows us to make a > distinction between different types of GPU memory based on who > exported the buffer. A single process can make use of several > different types of dma buffers (for example cached and uncached > versions of the same type of memory), and it would be useful to have > different limits for each. These are distinguished by the device name > string chosen when the gpucg_device is first registered. So is this understanding correct? (if there was an analogous line in gpu.memory.current to gpu.memory.max) $ cat gpu.memory.current total T dev1 d1 ... devN dn T = Σ di + RAM_backed_buffers and that some of RAM_backed_buffers may be accounted also in memory.current (case by case, depending on allocator). Thanks, Michal
