Add general purpose host memory allocator reference to cuIO with a demo of pooled-pinned allocation. #15079
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…th benchmarks for pooled-pinned memory.
nvdbaranec
added
libcudf
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Nice work @nvdbaranec !! |
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I like this ability. My only question is if we should follow the current optional memory resource passed into functions or if we should add this as a set/get. Maybe this becomes: I don't know where all this applies and the trouble of passing it through. |
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I'm really surprised the old host_memory_resource works with the pool. I added rmm::mr::pinned_host_memory_resource (which implements the cuda::mr::async_memory_resource and cuda::mr::memory_resource concepts instead of deriving from host_memory_resource) specifically to enable use with pool_memory_resource. Please use it instead of the old one.
…ref instead of host_resource_ref. Removed the pageable-memory path entirely.
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comment (non-blocking): In an ideal (and not too distant) world, this entire file will be unnecessary.
One shouldn't need to define their own allocator, or vector type. We should have an cuda::mr::allocator that can be constructed from a cuda::mr::resource_ref.
I understand not wanting to wait for that, but I just want to give you a heads up on what is coming.
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Sounds good. This is definitely worth replacing.
…eallocate functions so that we can pass the correct stream.
… define for default host alloc alignment instead of thrust.
| /** | ||
| * @brief Copy constructor | ||
| */ | ||
| rmm_host_allocator(rmm_host_allocator const& other) = default; |
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In rmm::device_buffer and device_uvector we delete the copy constructor and copy-assignment operator because they don't allow specifying a stream. YMMV, just suggesting it may be good practice.
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I think this would be better done as a followup. There are a number of places in cudf code using the assignment operator and thrust itself hits the copy constructor for mysterious reasons. For example, just calling reserve on the wrapping thrust::host_vector causes it to happen (h_data.reserve(max_size);). Something happening internally in thrust::detail::contiguous_storage
…ost_data field in hostdevice_vector.
…ties for lifetime management of the passed resource ref.
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/merge |
## Description Following #15079, we add a way to share the pinned pool in JNI with cuIO via the new method added by @nvdbaranec `set_host_memory_resource`. ## Checklist - [x] I am familiar with the [Contributing Guidelines](https://github.com/rapidsai/cudf/blob/HEAD/CONTRIBUTING.md). - [x] New or existing tests cover these changes. - [ ] The documentation is up to date with these changes. --------- Signed-off-by: Alessandro Bellina <[email protected]>
This PR adds a new interface to cuIO which controls where host memory allocations come from. It adds two core functions:
Addresses #14314
cudf::io::hostdevice_vectorwas currently implemented in terms of athrust::host_vector<>that explicitly uses an allocator calledpinned_host_vector. I copied that and made a new class calledrmm_host_vectorwhich takes any host_resource_ref. This probably makespinned_host_vectorobsolete.Parquet benchmarks have a new commandline option which lets you toggle between 3 modes:
The ultimate intent here is to reduce the cpu-side overhead of the setup code that comes before the decode kernels in the parquet reader. The wins are pretty significant for our faster kernels (that is, where we are less dominated by gpu time)
Edit: Updated to use newly minted resource ref types from rmm itself. I also switched the type to be
host_async_resource_refeven though in this case the user (thrust::host_vector) doesn't explicitly go through the async path. In addition, the pageable memory path (an experimental feature) has been removed.Pinned
Pooled/pinned
Checklist