[igt-dev] [RFC i-g-t 0/7] tests/i915/svm: Shared Virtual Memory (SVM) test

[Niranjan Vishwanathapura]

On Fri, Dec 13, 2019 at 01:54:22PM -0800, Niranjana Vishwanathapura wrote:
>Shared Virtual Memory (SVM) allows the programmer to use a single virtual
>address space which will be shared between threads executing on CPUs and GPUs.
>It abstracts away from the user the location of the backing memory, and hence
>simplifies the user programming model.
>SVM supports two types of virtual memory allocation methods.
>Runtime allocator requires a driver to provide memory allocation and
>management interface like buffer object (BO) interface.
>Whereas system allocator makes use of default OS memory allocation and
>management support (like malloc()).
>
>This patch series validates both SVM system and runtime allocator support.
>
>The patch series adds driver interface and some test cases.
>It tests for
> - Binding an address range or a BO in device page table
> - Migrating of pages to and from device memory
> - GPU access to memory through shared virtual address space
> - Implicit migration back to host memory upon CPU access
> - SVM capability and configurability on per vm basis
> - Large mappings
> - Both CPU copy and blitter copy of pages
> - Multiple context/vm support
> - Proper unbinding when the buffer is freed
> - Different allocation methods
> - Stress test
> - etc.
>

Required i915 driver support is posted here.
https://lists.freedesktop.org/archives/intel-gfx/2019-December/223480.html

Thanks,
Niranjana

>Niranjana (1):
>  drm-uapi: Import SVM UAPI
>
>Niranjana Vishwanathapura (6):
>  lib: Add interface to support SVM
>  tests/i915/svm: Add basic SVM RT allocator test support
>  tests/i915/svm: Add mmap support for SVM RT allocator
>  tests/i915/svm: Add basic SVM SYS allocator test support
>  tests/i915/svm: Add multiple process tests
>  tests/i915/svm: Add stress test
>
> include/drm-uapi/i915_drm.h |  74 ++++
> lib/i915/gem_context.c      |  27 ++
> lib/i915/gem_context.h      |   2 +
> lib/i915/gem_vm.c           |  48 +++
> lib/i915/gem_vm.h           |   6 +
> lib/ioctl_wrappers.c        | 154 +++++++
> lib/ioctl_wrappers.h        |  14 +
> tests/Makefile.sources      |   3 +
> tests/i915/i915_svm_basic.c | 808 ++++++++++++++++++++++++++++++++++++
> tests/meson.build           |   1 +
> 10 files changed, 1137 insertions(+)
> create mode 100644 tests/i915/i915_svm_basic.c
>
>-- 
>2.21.0.rc0.32.g243a4c7e27
>
>_______________________________________________
>igt-dev mailing list
>igt-dev at lists.freedesktop.org
>https://lists.freedesktop.org/mailman/listinfo/igt-dev